Introduction and Setup Impressions

The Intel NUC category has been an interesting product line to analyze, as it provides us with insights into where the traditional casual / home use desktop market might end up. UCFF (ultra-compact form factor) PCs have had an excellent reception in the market, both from home and business users. Intel kickstarted the market with the Sandy Bridge NUCs a couple of years back. Since then, we have had NUCs based on Ivy Bridge, Haswell and even Bay Trail. Other vendors such as GIGABYTE, Zotac and ECS have their own UCFF variants in the BRIX, nano xs and LIVA models respectively.

UCFF PCs have become popular due to a host of factors - performance per watt has improved to such an extent that much of the average consumer's traditional desktop work can be done with systems sporting a sub-20W TDP CPU. SSDs are becoming smaller and smaller, with even 1 TB mSATA units available in the market. High speed interfaces such as USB 3.0 have also become ubiquitous, removing the need for dedicating storage space inside the chassis for fast access to large amounts of data. The advent of mobile platforms have also made casual gaming quite popular - and power-hungry discrete GPUs are not needed for those. All these trends have enabled powerful palm-sized computers - the Next Unit of Computing. Intel has been pushing the performance per watt aspect and GPU performance heavily in the last few generations, making each successive NUC generation more attractive than the one before.

The 14nm Broadwell CPUs were introduced into the market with the Core M branding for fanless ultraportables. Essentially a rebranding of Y-series CPUs, its power efficiency got everyone excited about what a higher TDP version (U-series) could bring for the PC market. Even as ultrabooks based on Broadwell-U are getting ready for the market, Intel and its partners have started getting the UCFF units into the hands of consumers. Intel's Broadwell NUCs were introduced at CES 2015. We have already reviewed GIGABYTE's Core i7-5550U-based BRIX s unit, giving us some insight into how a 15 W TDP Broadwell-U might perform for common workloads. In the concluding section of that review, we had remarked that it would be interesting to see how Intel would differentiate its Broadwell NUC from its partners' UCFF PCs. This review of the NUC5i5RYK - Intel's Core i5 Broadwell-U-based NUC - provides some insights.

The first Sandy Bridge NUC was important for two main reasons - the obvious one being the kickstarting of the UCFF craze. The other one was the introduction of Intel's premium external I/O interface - Thunderbolt - in a reasonably priced system outside the Apple ecosystem. Unfortunately, with Ivy Bridge and Haswell, Intel took a step backwards. NUCs based on those didn't stand out much from what was brought out by vendors such as GIGABYTE and Zotac (in the non-vPro market). With the Broadwell-U NUCs, Intel is trying to regain the edge. These units are the first UCFF PCs that we have seen with support for M.2 PCIe SSDs.

Traditionally, the NUCs are barebones machines - the end-user could choose an appropriate mSATA SSD (or, for selected models, 2.5" drives), a mini-PCIe WLAN adapter, DDR3L SO-DIMMs and an operating system. Intel has two main changes in the barebones approach for the Broadwell-U NUCs: The WLAN adapter (Intel AC7265) now comes soldered to the motherboard. mSATA SSDs are no longer supported. In its place, we have support for either SATA or PCIe-based M.2 SSDs. Similar to the previous generation NUCs, a free SATA port is available on the board. It can be used to hook up 2.5" drives in certain models.

In order to bring out the capabilities of the NUC5i5RYK, we evaluated two configuration:

• Mainstream (M.2 SATA SSD + DDR3L 1600 C9)
• Enthusiast (M.2 PCIe 2.0 x4 SSD + DDR3L 1866 C10)

The specifications of both NUC5i5RYK review configurations are summarized in the table below.

Intel NUC5i5RYK Specifications
Processor	Intel Core i5-5250U (2C/4T x 1.60 GHz, 14nm, 3MB L2, 15W TDP)
Memory	2x 4GB DDR3L 1600 C9 [ Mainstream ] 2x 4GB DDR3L 1866 C10 [ Enthusiast ]
Graphics	Intel HD Graphics 6000 (Broadwell-U GT3)
Disk Drive(s)	Intel SSD 530 Series 360 GB M.2 SATA SSD [ Mainstream ] Samsung XP941 Series 256 GB M.2 PCIe 2.0 x4 SSD [ Enthusiast ]
Networking	1x Intel I218-V GbE, 2x2 Intel AC7265 802.11ac Wi-Fi
Audio	Capable of 5.1/7.1 digital output with HD audio bitstreaming (HDMI)
Operating System	Retail unit is barebones, but we installed Windows 8.1 Pro x64
Pricing (As configured)	$662 [ Mainstream ] $728 [ Enthusiast ] $400 [ Barebones ]
Full Specifications	Intel NUC5i5RYK Specifications

The Intel NUC5i5RYK kit doesn't come with any pre-installed OS, but our pre-production engineering sample review unit came with a USB key containing the drivers. In addition to the main unit, the other components of the package include a 65 W (19V @ 3.43A) wall-wart (with detachable multi-country power plugs), a VESA mount (along with the necessary screws), setup guides and a QVL (qualified vendors list) for the memory and storage subsystems. The gallery below takes us around the package contents and the external features of the unit.

The NUC5i5RYK officially supports DDR3L SO-DIMMs at 1600 MHz. The Kingston HyperX modules that we utilized for the mainstream build had no trouble whatsoever in operating at the rated speed and latencies. For the enthusiast build in which we went the M.2 PCIe SSD route, we initially tried to use the Corsair Vengeance 2133 MHz (C11) kit that worked well in the Broadwell BRIX s unit. Unfortunately, the NUC refused to boot with that kit. Given the pre-production nature of the kit and the absence of the Corsair Vengeance series in the QVL, it didn't come across as too much of a surprise.

In any case, we were able to utilize the 1866 MHz (C10) kit without any problems whatsoever. The BIOS (with memory auto-configuration by default) automatically configured the memory speeds to the maximum rated value. Intel's Visual BIOS is one of the few UEFI BIOSes that provide a good user experience. Plenty of configuration options are available for the end-user (including configurable maximum sustained as well as burst power consumption). The gallery below shows the various BIOS options available.

Certain default configurations (such as disabling of the WLAN subsystem) in the BIOS are questionable, but they should be hopefully fixed by the time the NUC5i5RYK officially starts shipping to end users.

In the table below, we have an overview of the various systems that we are comparing the Intel NUC5i5RYK (Enthusiast) against. Note that they may not belong to the same market segment. The relevant configuration details of the machines are provided so that readers have an understanding of why some benchmark numbers are skewed for or against the Intel NUC5i5RYK (Enthusiast) when we come to those sections.

Comparative PC Configurations
Aspect	Intel NUC5i5RYK (Enthusiast)	Intel NUC5i5RYK (Enthusiast)GIGABYTE GB-BXi7H-5500GIGABYTE GB-BXi7-4770R (2)GIGABYTE GB-BXi7-4500ASRock Vision HT 321BHabey BIS-6922Intel NUC5i5RYK (Mainstream)Intel D54250WYKHZotac ID89 Plus
CPU	Intel Core i5-5250U	Intel Core i5-5250U
GPU	Intel HD Graphics 6000 (Broadwell-U GT3)	Intel HD Graphics 6000 (Broadwell-U GT3)
RAM	Corsair Vengeance CMSX8GX3M2B1866C10 10-10-10-32 @ 1866 MHz 2x4 GB	Corsair Vengeance CMSX8GX3M2B1866C10 10-10-10-32 @ 1866 MHz 2x4 GB
Storage	Samsung XP941 Series MZHPU256HCGL (256 GB; M.2 Type 2280 PCIe 2.0 x4; 19nm; MLC)	Samsung XP941 Series MZHPU256HCGL (256 GB; M.2 Type 2280 PCIe 2.0 x4; 19nm; MLC)
Wi-Fi	Intel Dual Band Wireless-AC 7265 (2x2 802.11ac - 867 Mbps)	Intel Dual Band Wireless-AC 7265 (2x2 802.11ac - 867 Mbps)
Price (in USD, when built)	$728	$728

 

Performance Metrics - I

The Intel NUC5i5RYK was evaluated using our standard test suite for low power desktops / industrial PCs. We revamped our benchmark suite early last year after the publication of the Intel D54250WYK NUC review. We reran some of the new benchmarks on the older PCs also, but some of them couldn't be run on loaner samples. Therefore, the list of PCs in each graph might not be the same.

Futuremark PCMark 8

PCMark 8 provides various usage scenarios (home, creative and work) and offers ways to benchmark both baseline (CPU-only) as well as OpenCL accelerated (CPU + GPU) performance. We benchmarked select PCs for the OpenCL accelerated performance in all three usage scenarios. These scores are heavily influenced by the CPU in the system. The Core i5-5250U is obviously not as powerful as the Iris Pro-equipped Core i7-4770R in the BRIX Pro. However, note that the M.2 PCIe SSD and the faster DRAM (despite the lower latency) help the enthusiast configuration take a handy lead over the mainstream configuration in all the PCMark benchmarks.

Miscellaneous Futuremark Benchmarks

PCMark 7 seems to favor the Core i7 models much more compared to the PCMark 8 benches. However, even in this suite, the enthusiast configuration performs better (similar to what we saw in the previous sub-section). The faster memory also helps the GPU post better scores under the enthusiast configuration for the 3DMark benches. Surprisingly, HD 6000 doesn't perform better than the HD 5500 in the Broadwell BRIX s when the 3DMark 2013 scores are considered. However, 3DMark 11 clearly favors the HD 6000.

3D Rendering - CINEBENCH R15

We have moved on from R11.5 to R15 for 3D rendering evaluation. CINEBENCH R15 provides three benchmark modes - OpenGL, single threaded and multi-threaded. Evaluation of select PCs in all three modes provided us the following results.

As far as 3D rendering goes, the Broadwell-U NUC really doesn't provide any great benefits compared to the Haswell-U NUC. Faster memory helps with the multi-threaded and OpenGL-accelerated rendering a bit, but, other than that, there is really not much to talk about with this benchmark in terms of performance improvement.

Performance Metrics - II

In this section, we mainly look at benchmark modes in programs used on a day-to-day basis, i.e, application performance and not synthetic workloads.

x264 Benchmark

First off, we have some video encoding benchmarks courtesy of x264 HD Benchmark v5.0. This is simply a test of CPU performance. As expected, the configurations based on the Core i5-5250U are not as powerful as the Core i7-based ones. The effect of faster memory is almost non-existent. The slightly higher burst frequency of the Core i5-5250U (2.7 GHz) compared to the Core i5-4250U (2.6 GHz) help the NUC5i5RYK take a slight lead over the corresponding Haswell NUC.

7-Zip

7-Zip is a very effective and efficient compression program, often beating out OpenCL accelerated commercial programs in benchmarks even while using just the CPU power. 7-Zip has a benchmarking program that provides tons of details regarding the underlying CPU's efficiency. In this subsection, we are interested in the compression and decompression MIPS ratings when utilizing all the available threads.

Results in the compression benchmark are similar to what we observed for 3D rendering - Broadwell-U doesn't provide too much benefit over Haswell-U except when burst frequencies play a major role. This is understandable - 14nm helps sustain higher clock rates for the same power consumption.

TrueCrypt

As businesses (and even home consumers) become more security conscious, the importance of encryption can't be overstated. CPUs supporting the AES-NI instruction for accelerating the encryption and decryption processes have, till now, been the higher end SKUs. However, with Bay Trail, even the lowly Atom series has gained support for AES-NI. The Core i5-4200H in the BXi5G-760 does have AES-NI support. TrueCrypt, a popular open-source disk encryption program can take advantage of the AES-NI capabilities. The TrueCrypt internal benchmark provides some interesting cryptography-related numbers to ponder. In the graph below, we can get an idea of how fast a TrueCrypt volume would behave in the Intel NUC5i5RYK and how it would compare with other select PCs. This is a purely CPU feature / clock speed based test.

Agisoft Photoscan

Agisoft PhotoScan is a commercial program that converts 2D images into 3D point maps, meshes and textures. The program designers sent us a command line version in order to evaluate the efficiency of various systems that go under our review scanner. The command line version has two benchmark modes, one using the CPU and the other using both the CPU and GPU (via OpenCL). The benchmark takes around 50 photographs and does four stages of computation:

• Stage 1: Align Photographs
• Stage 2: Build Point Cloud (capable of OpenCL acceleration)
• Stage 3: Build Mesh
• Stage 4: Build Textures

We record the time taken for each stage. Since various elements of the software are single threaded, others multithreaded, and some use GPUs, it is interesting to record the effects of CPU generations, speeds, number of cores, DRAM parameters and the GPU using this software.

The results show that the faster DRAM helps despite increased latency. GPU acceleration proves beneficial in cutting down the time taken for the second stage considerably.

Dolphin Emulator

Wrapping up our application benchmark numbers is the Dolphin Emulator benchmark mode results. This is again a test of the CPU capabilities, and the Core i7-based models obviously trump the Core i5-based ones.

Gaming Benchmarks

Intel's integrated GPUs don't have a big name in the gaming community. Once in a while, Intel throws in a surprise. In the Haswell family, CPUs with Iris Pro graphics gave a pleasant surprise to casual gamers. In this section, we will identify whether the Intel HD Graphics 6000 in the Core i5-5250U can provide an acceptable gaming experience. It will also be interesting to determine whether HD 6000 can provide better numbers compared to the HD 5500 in the Core i7-5500U (BRIX s).

For the purpose of benchmarking, we chose four different games (Sleeping Dogs, Tomb Raider, Bioshock Infinite and DiRT Showdown) at three different quality levels. As someone focusing on HTPCs and multimedia aspects, I rarely get to process gaming benchmarks, even while evaluating GPUs. One of the aspects that I feared was spending lot of time in installing the same games again and again on different PCs under the review scanner. The solution was to go the Steam route. Unfortunately, Steam also likes to keep the game files updated. A quick online search revealed that Steam could make use of an external drive for storing the game executables and downloadable content. With the Steam drive on-the-go use-case being read-heavy, the Corsair Flash Voyager GS USB 3.0 128GB Flash Drive (with read speeds of up to 275 MBps) was ideal for use as a portable Steam drive.

Sleeping Dogs

Tomb Raider

Bioshock Infinite

DiRT Showdown

The gaming benchmarks, when considered as a showdown between the HD Graphics 5500 and HD Graphics 6000, is is a complete walkover for the former in the Core i7-5500U. Faster memory helps in salvaging a few FPS here and there, but the games are not fluid even with all settings dialed down. One aspect to be kept in mind while considering the above results is that the HD 5500 in the Core i7-5500U had accesses to DRAM running at 2133 MHz, while the HD 6000 in the NUC5i5RYK was limited to 1866 MHz.

Networking and Storage Performance

We have recently started devoting a separate section to analyze the storage and networking credentials of the units under review. On the storage side, one option would be repetition of our strenuous SSD review tests on the drive(s) in the PC. Fortunately, to avoid that overkill, PCMark 8 has a storage bench where certain common workloads such as loading games and document processing are replayed on the target drive. Results are presented in two forms, one being a benchmark number and the other, a bandwidth figure. We ran the PCMark 8 storage bench on selected PCs and the results are presented below.

While the storage subsystem score doesn't bring out the efficacy of the M.2 PCIe SSD, the storage bandwidth number shows a chart-leading 322 MBps for the XP941 in the NUC5i5RYK. For good measure, we also ran the inbuilt benchmark in Samsung Magician (which doesn't support XP941 due to its OEM nature) to make sure that the SSD was utilizing the full capabilities offered by the PCIe lanes.

Sequential reads came in at 1 GBps and sequential writes at 716 MBps. Random accesses had upwards of 40K IOPS. All these point to the NUC5i5RYK possessing a ultra-compact platform with support for insanely fast primary storage media.

On the networking side, we restricted ourselves to the evaluation of the WLAN component. Our standard test router is the Netgear R7000 Nighthawk configured with both 2.4 GHz and 5 GHz networks. The router is placed approximately 20 ft. away, separated by a drywall (as in a typical US building). A wired client (Zotac ID89-Plus) is connected to the R7000 and serves as one endpoint for iPerf evaluation. The PC under test is made to connect to either the 5 GHz (preferred) or 2.4 GHz SSID and iPerf tests are conducted for both TCP and UDP transfers. It is ensured that the PC under test is the only wireless client for the Netgear R7000. We evaluate total throughput for up to 32 simultaneous TCP connections using iPerf and present the highest number in the graph below.

In the UDP case, we try to transfer data at the highest rate possible for which we get less than 1% packet loss.

Intel's AC7265 now behaves like a true 2x2 solution compared to the AC7260 in our testbed. While the numbers are not as good as those obtained with Broadcom-based 802.11ac WLAN cards, the improved performance is quite welcome.

HTPC Credentials

The NUC5i5RYK is a UCFF PC, but, thanks to the 15W TDP CPU inside, it doesn't require a noisy thermal solution. Subjectively speaking, the unit is silent for most common HTPC use-cases. Only under heavy CPU / GPU loading does the fan become audible. In our investigation, recent software improvements in the software chain for playback on Windows have lightened the stress considerably. The NUC5i5RYK definitely makes a good HTPC for folks who don't want to pay the premium for a passively cooled system.

Refresh Rate Accurancy

Starting with Haswell, Intel, AMD and NVIDIA have been on par with respect to display refresh rate accuracy. The most important refresh rate for videophiles is obviously 23.976 Hz (the 23 Hz setting). As expected, the Intel NUC5i5RYK has no trouble with refreshing the display appropriately in this setting.

The gallery below presents some of the other refresh rates that we tested out. The first statistic in madVR's OSD indicates the display refresh rate.

Network Streaming Efficiency

Evaluation of OTT playback efficiency was done by playing back our standard YouTube test stream and five minutes from our standard Netflix test title. Using HTML5, the YouTube stream plays back a 720p encoding. Since YouTube now defaults to HTML5 for video playback, we have stopped evaluating Adobe Flash acceleration. Note that only NVIDIA exposes GPU and VPU loads separately. Both Intel and AMD bundle the decoder load along with the GPU load. The following two graphs show the power consumption at the wall for playback of the HTML5 stream in Mozilla Firefox (v 35.0.1).

GPU load was around 13.46% for the YouTube HTML5 stream and 2.92% for the steady state 6 Mbps Netflix streaming case.

Netflix streaming evaluation was done using the Windows 8.1 Netflix app. Manual stream selection is available (Ctrl-Alt-Shift-S) and debug information / statistics can also be viewed (Ctrl-Alt-Shift-D). Statistics collected for the YouTube streaming experiment were also collected here.

For similar OTT streaming workloads, the NUC5i5RYK unit consumes slightly lower power at the wall compared to the corresponding Haswell NUC. That said, it is difficult to quantify how much of this is due to Broadwell moving down to 14nm. Other components such as the WLAN adapter, DRAM and even the power supply have changed between the two compared units. That said, the Core i5 U-based Broadwell NUC is more power-efficient for these workloads compared to the Core i7 U-based BRIX units.

Decoding and Rendering Benchmarks

In order to evaluate local file playback, we concentrate on EVR-CP and madVR using the mainstream configuration (which has the 1600 MHz DRAM). We already know that EVR works quite well even with the Intel IGP for our test streams. In our Broadwell BRIX s review, we found the HD Graphics 5500 to be incapable of downscaling 4kp30 to 1080p using default madVR settings. We didn't have much hopes for HD Graphics 6000 and our fears were confirmed when similar results were obtained with the NUC5i5RYK initially using the LAV Filters DXVA 2 Copy-Back mode in MPC-HC 1.7.8.

One of the odd aspects that we found in the course of the 4kp30 playback and downscaling process using madVR was that the GPU loading never went above 70%, but approximately half the frames were getting dropped. A careful analysis of the OSD revealed that the split queue was simply not able to keep up (with queues prior to that in the OSD being kept close to full). madVR's split queue copies the decoded frames from the GPU RAM to system RAM and then back to GPU RAM. However, this process seemed to be too slow for 4Kp30 content on the Intel IGP. Just as we were about to wrap up testing of the decoding and rendering aspects, LAV Filters 0.64 was released with huge improvements in DXVA Copy-Back performance. We repeated our benchmarks after overriding the in-built LAV filters of MPC-HC 1.7.8 with LAV Filters 0.64. 4Kp30 downscaling with madVR default settings worked without any dropped frames.

Usually, we suggest usage of the QuickSync decoder built into LAV Video Decoder whenever playback with an Intel IGP machine is desired. However, HEVC decode acceleration using DXVA (implemented partially in software) is available only in the DXVA2N and DXVA2 Copy-Back modes for Broadwell. Hence, we no longer recommend setting the default codec in LAV Video Decoder to Intel QuickSync.

In our earlier reviews, we focused on presenting the GPU loading and power consumption at the wall in a table (with problematic streams in bold). This time around, we decided to represent the GPU load and power consumption in a graph with dual Y-axes. Nine different test streams of 90 seconds each were played back with a gap of 30 seconds between each of them. The characteristics of each stream are annotated at the bottom of the graph. Note that the GPU usage is graphed in red and needs to be considered against the left axis, while the at-wall power consumption is graphed in green and needs to be considered against the right axis.

Points of concern would be GPU loading being consistently above 85 - 90%, but there is no such case in the two scenarios tested above. Power consumption at the wall is less than 15 W for even the most complicated streams when using EVR-CP, while madVR with DXVA2 Copy-Back decoding averages around 20 W for the higher complexity streams involving scaling for fast frame rate or high-resolution content.

Power Consumption and Thermal Performance

The power consumption at the wall was measured with a 1080p display being driven through the HDMI port. In the graphs below, we compare the idle and load power of the Intel NUC5i5RYK (Enthusiast) with other low power PCs evaluated before. For load power consumption, we ran Furmark 1.12.0 and Prime95 v27.9 together. The numbers are not beyond the realm of reason for the combination of hardware components in the machine.

By default, the BIOS puts the unit in the maximum power consumption / performance mode. The above numbers are with those default settings. It is possible for the end-user to drive down the numbers further with tweaks in the BIOS (at the cost of performance)

In terms of thermal design, the NUC5i5RYK is no different from the Haswell NUC. There are ventilation slots on the side and a small fan directly beneath the lid helps draw in air over the heatsink that is placed behind the slots. On the other side, the lid has a thermal protection strip adhered to it such that it gets placed directly over the M.2 SSD. This ensures proper cooling for the storage media (an issue that one of the previous generation NUCs faced). In order to evaluate the thermal performance, we started with the system at idle, followed by 30 minutes of pure CPU loading. This was followed by another 30 minutes of both CPU and GPU being loaded simultaneously. After this, the CPU load was removed, allowing the GPU to be loaded alone for another 30 minutes.

In the pure CPU loading scenario, the cpre frequencies stay well above the suggested base value of 1.6 GHz, thanks to the BIOS setting controlling the maximum allowed sustained power consumption. The turbo burst frequency of 2.7 GHz is observed only very briefly, and the cores settle down to between 2.4 and 2.5 GHz. We see the temperature stabilizing slightly above 80 C (despite the junction temperature being 105 C). On the other hand, when the CPU and GPU are both loaded, the frequencies drop down to around 1.3 GHz for the cores. The GPU is advertised to run at a base clock of 300 MHz, with a turbo mode of 950 MHz. The actual frequency stays above 700 MHz comfortably throughout our stress test. In the absence of any CPU load, the cores drop down to 800 MHz. The temperatures are also below 80 C throughout the time that the GPU is loaded up. The behavior of the clocks is similar to what we observed for the GIGABYTE Broadwell BRIX s.

The above graph presents the power consumption at the wall during the above thermal stress run. This shows that Intel has designed the NUC with a certain maximum power budget in mind, and the clocks of the CPU and GPU are adjusted depending on the load to obey that configurable TDP. One interesting aspect is that the GPU clock at idle is always reported to be 900 MHz by various tools. We assume there is some sort of inner clock-gating going on beyond the observation point. Otherwise, it is possible to drive down the idle power consumption even further. The thermal performance of the enthusiast build was along the same lines, with a cap of around 34 W for the maximum power consumption at the wall.

All in all, the thermal solution is very effective. Given that the acoustic side-effects were not irksome (subjectively) and the temperature of the CPU package was well under the junction temperature limits, we wonder if Intel has missed a trick by dialing down the overclocking and not allowing the full performance potential of the system to come through with the default BIOS settings.

Final Words

The Intel NUC5i5RYK provided us with the opportunity to take a look at what Broadwell-U can deliver when coupled with a motherboard providing premium features. The migration from 22nm to 14nm has allowed for higher base clocks while maintaining the same power envelop. The performance delta over the Haswell-U-based D54250WYKH (particularly, on the graphics side) is noticeable. That said, while migrating from Sandy Bridge or Ivy Bridge is a no-brainer, there is not enough on offer to recommend migrating from a Haswell-based UCFF PC.

The BIOS in our pre-production review kit had some quirks and the QVL could do with some additions (particularly, support for 2133 MHz DRAM kits would be very welcome). Hopefully, these get fixed as the official market availability date (sometime in March) draws near. We also covered aspects such as replaceable lids for added functionality (NFC and wireless chargining, for example) and customization in our launch piece. Similar to the previous generation NUCs, we also have a kit with support for a 2.5" drive.

The NUC5i5RYK provides an admirable UCFF PC option due to three major aspects:

• Availability of a M.2 PCIe 2.0 x4 slot for SSDs while retaining compatibility with M.2 SATA SSDs
• Presence of an I218-V GbE controller compared to the Realtek-based controllers in other UCFF / mini-PCs
• Upgrade to the Intel AC7265 2x2 802.11ac solution for the WLAN component

There is scope for improvement in terms of the overall feature set. For the home-consumer focused kits, it would be nice if a mini-HDMI to HDMI adapter were to be bundled. Even better would be a full-sized HDMI port - GIGABYTE, ECS and Zotac have shown that it is possible to cram in a full-sized HDMI port even in the NUC form factor. While M.2 PCIe SSD support is a welcome addition, it would be great to get Thunderbolt support back into the NUC ecosystem. For cutting-edge HTPCs, the absence of HDMI 2.0 and full hardware decoding for HEVC streams is a drawback. However, we know that those will definitely be getting fixed in the upcoming generations.

The final aspect we talk about today is the pricing. The NUC5i5RYK seems to be available for $376 on PCConnection as of today (even though Intel indicated a street price slightly north of $400). M.2 SSDs (PCIe or SATA) still carry a premium. For users wishing to keep the build cost down, the NUC5i5RYH model with support for 2.5" drives might be a better option.