Need Ultrabook components in a tiny desktop?
Intel's quasi-barebones NUC PC is back for round three, with the sexy-named "NUC5i5RYK" SKU leading the charge. Equipped with Intel's i5-5250U dual-core CPU, clocked at 1.6GHz, the processor still comes soldered to the NUC's motherboard. And once again, owners will have to bring their own OS to the party.
In terms of form factor, the NUC is still extremely portable—it measures 4.5x4.3x1.3 inches and weighs one pound, 4 ounces. Ports include four USB 3.0, one Mini HDMI 1.4a, one Mini DisplayPort 1.2, and an Ethernet jack. In addition to the new Broadwell proc, there are several upgrades to the NUC5i5RYK. This NUC now supports up to 16GB of 1866MHz SO-DIMM RAM, with its two memory slots. This addition is appreciated, considering the old NUC D54250WYKH SKU would only support 1,600MHz RAM. For the purposes of this review, Intel provided us with 8GB of HyperX DDR3L RAM clocked at 1,600MHz, but you'll have to BYO if you want to join in on the NUC party. In addition, this NUC does away with both SATA and mSATA slots and replaces them with the faster M.2 standard, previously known as the Next Generation Form Factor. For review purposes, Intel provided us with its own 530 series M.2 SSD and Samsung's more expensive XP941 series 256GB drive, to give us an idea of how an enthusiast M.2 SSD could take advantage of the speedier slot. Finally, another nice addition to this is an 802.11ac and Bluetooth 4.0 combo adapter. With previous SKUs, you bought your own.

Accessing all of these components is just as easy as unscrewing four screws on the bottom of the NUC. Owners may be happy to hear that the base uses captured screws, which means they won't fall out. Users will be able to install their M.2 drives by unscrewing a single screw, which anchors the drive in place (we had to use a small Phillips head screwdriver here because our standard screwdriver was too big). You can also pry open and change the top cover. The default black lid pops out easily enough with a thin flathead screwdriver. Intel says there will be different color options available, but we don't really see this catching on in much of a big way outside of the enthusiast NUC community.
Considering that Broadwell is a "tick" on Intel's tick-tock roadmap and equates to a new 14nm manufacturing process, our CPU is focused more on power efficiency than pure performance gains. Oddly enough, however, we saw a bit of the reverse to be true in our test. Measuring the wattage, this NUC5i5RYK soaked up roughly one watt less at idle than the D54250WYKH Haswell NUC we reviewed last year, but consumed roughly five more watts when we stressed it under Prime95 and Furmark. Thankfully, this Broadwell NUC made up for it in performance, where it bested its Haswell cousin by roughly 7–10 percent in our CPU benchmarks.
While the CPU gains were admirable, we saw a bigger delta in our graphics benchmarks. The NUC5i5RYK uses Intel's HD Graphics 6000, and while it doesn't hold a candle to the Gigabyte Brix Pro we reviewed last year, which uses Intel's top-of-the-line Iris Pro graphics, it is a step up compared to Intel's HD Graphics 5000 series, beating it by 10–45 percent in our graphics tests.
Considering that the box is quite small, you might be wondering how hot or loud it gets. When the NUC is sitting idle, it's both cool and quiet. Under the onslaught of our benchmarks, however, the fan did rev up, but it was hardly offensive. The box also got a little warm to the touch, but nowhere near as scorching as the Gigabyte Brix Pro, which is an enthusiast NUC gunning for performance.
The real story here pertains to the included M.2 slot, which allows for some ridiculous storage speeds. With Intel's 530 Series M.2 SSD installed, we saw sequential-read and -write speeds of 419MB/s and 213.6MB/s, respectively, using our CrystalDiskMark benchmark. Those numbers aren't super impressive, but considering that a 180GB drive will run you $105, it isn't a super high-end SSD either. When we plopped in Samsung's more expensive ($254) XP941 256GB M.2 drive, however, we got stupid sequential-read and -write speeds of 1,089MB/s and 798MB/s, respectively. You're grandmother's traditional 2.5-inch SSDs can't touch those numbers, as they are limited to SATA III's 6Gb/s bandwidth cap. What makes M.2 drives interesting is that they come in different sizes and even have different connectors. Interesting tidbit aside, the downside of M.2 SSDs at the moment is that they aren't as plentiful as traditional 2.5-inch SSDs, and are still quite expensive. Alas, this is the price you pay for being an early adopter.
If you can stomach the extra cashola that the M.2 slot currently demands, then you'll appreciate some of the tweaks that this NUC brings to the table. The included Bluetooth and Wi-Fi are greatly appreciated, and we like that you can stuff speedier RAM in the box, which could further bolster the integrated graphics. Like other NUCs, we still feel that it's going to be a pretty niche product at the end of the day. It's certainly not hard to build into, and could be a good first step for the noob PC builder. That said, the fact you have to purchase your own storage, RAM, OS, and install all the drivers yourself may turn off PC noobs from picking up what is essentially a pretty cool Ultrabook tossed into a small desktop form factor.
$400

