What to Expect

With Intel going for a full YUHS launch today, looking up and down the stack there are a number of interesting things to consider at each segment.  Starting with Skylake-Y, or Core M, the new branding to m7/m5/m3 will hopefully make it easier for users to ascertain the performance of their processor, but it also allows Intel to inject vPro into various SKUs, such as the upcoming update to Intel’s Compute Stick.

In the mini-PC space, through various sources in the industry, we are told that it is the vPro moniker for these devices (such as the NUC and Compute Stick) that generate the higher proportion of sales. At this point, the vPro versions of Core M are not due out until later in Q4/even Q1, but I assume we should see something at the Consumer Electronics Show during the first week of January.

One element we haven’t touched upon is how Intel will implement different TDP aspects to both its Skylake-Y and Skylake-U lines. With Haswell and Broadwell, most processors had a cTDP Up and a cTDP Down mode that allowed the device OEM to take a processor and move it slightly outside its normal TDP window, perhaps to take advantage of a chassis design they already had and either increase battery life or increase performance.

Now due to Speed Shift, one could argue that cTDP down is less relevant, and when cTDP up is available and a Speed Shift aware operating system is installed, that setting might be used as well. Because Speed Shift is not universal, there is still this element of cTDP Up and Down to contend with. To insert a few more caveats, it seems like SDP (scenario design power) might also be part of the equation, especially in the Skylake-Y domain.

It is worth noting that the Skylake-Y package is crazy small. At IDF Intel showed off a finished Skylake-Y package to demonstrate the CPU die size in relation to the package size, and to compare the overall package size to the already small Broadwell-Y package. While both packages are still 16.5mm wide, Intel has compacted the overall layout and squared off the CPU die, bringing the height of the Skylake-Y package down from 30mm to 20mm, a 33% savings in package size.

Meanwhile Intel also had the other BGA Skylake processor packages on display as well:

Actually in this shot, we can calculate the die size of the Y 2+2 die to be approximately 98.5 mm2 (9.57mm x 10.3mm). This is compared to the 4+2 arrangement on Skylake-K which we measured at 122.4mm2. At this package size of 20 x 16.5 mm, Intel is claiming a 40% gain in graphics performance for Skylake-Y over Broadwell-Y, which will be interesting to compare when we get some samples in house.

Skylake-Y still comes in as Intel’s premium low power processor, with 1K pricing from $281 to $393. That more or less aligns with Broadwell-Y, but we also get a Pentium model that is severely cut with no turbo mode and only 1 MB of L3 cache per core.

The 15W models of Skylake-U either follow the 00U naming for GT2 graphics (24 EUs) or 50U/60U for GT3e graphics (48 EUs with 64MB eDRAM). The pricing on the GT3e parts is not given as they will be coming later in the year, but it can be pointed out that the base frequency for the GT2 parts is actually higher than the GT3 parts. Also, the L3 cache on the i5-U processors with GT2 is at 1.5 MB/core rather than 2 MB/core. Normally all the i5 parts would be below the i7 parts, but because the eDRAM arrangement moves up to 2 MB/core, the i5-U parts with GT3e have to comply.

Moving up to 28W with Skylake-U presents us with the higher power GT3e models. Similarly, the pricing has not been announced for these but for all the processors the base frequency is relatively high (2.7 GHz to 3.3 GHz) with only a small jump to the maximum frequency.  The i3 at the bottom without any turbo frequency but with GT3e would be an interesting part to play with.

At 45W, the Skylake-H mobile processors almost all move into quad core territory here, aligning with the power increase, but also moving down to GT2 arrangements. We get a vew vPro enabled parts here too, and the pricing of the i5 seems quite reasonable.

There is one part that stands out – the i7-6820HK. This is Intel’s mobile part that can be user overclocked. Yes, that’s not a typo. This processor is designed to go into laptop systems that have sufficient cooling (either high powered air… or water) and can be pushed when they are needed. Expect to see this part in the large 17” desktop replacement gaming systems over the next few months.

Intel is also releasing a couple of mobile processors under the Xeon branding. This means ECC support and all the other Xeon benefits, but in a processor specifically designed for notebooks rather than a repurposed desktop processor that might not fit properly / give the best ergonomics. When these were announced, it was perhaps wishful thinking that Xeon would come down to 15W, perhaps offering ultrabooks with this feature set, though I imagine at 45W we will see some desktop-replacement workstations with professional grade graphics cards, such as the already-announced Lenovo workstation laptops.

On the Skylake-S side of the equation, the processors come in two segments. Here is the list of the low powered processors that have the ‘T’ in the name, or unofficially known as ‘Skylake-T’. These are all 35W, some with vPro, but covering the i3/i5/i7 lines sufficiently.

The non-T and non-K desktop processors come in at 65W, and there are no real surprises here in the product lines as they migrate well enough from previous generation designations.  All the Skylake-S i3/i5/i7 processors have HD 530 graphics.

Beyond Skylake and to Kaby Lake

Post Skylake, Intel is breaking from the tick-model to tick-tock-tock, posting a third generation on 14nm called Kaby Lake (pronounced Kah-bee, as far as we were told).

This stems from the issues of moving to smaller process nodes. At 14nm, this equates to only 90 silicon atoms, meaning ever more intensive manufacturing is required which drives up cost and reduces yield. Due to the issues Intel had at 14nm using their second generation FinFET method and more advanced double patterning, initial costs were high and yields were lower than expected for the timeframe, pushing Broadwell to a later-than-expected timeline. Skylake was kept to the regular timeline, resulting in a brief outing for Broadwell (on the desktop especially). But we suspect that similar reasoning is behind a delay from 14nm to 10nm –more esoteric ways under conventional methodology are required to keep driving the node down, and with that comes extra challenges that delay both time to market and yield numbers before tweaking the design.

We’ve mentioned in the past that the development of extreme-ultra-violet (EUV) technology is one element that could assist this drive down, however Intel is not expected to implement this for 10nm but rather for 7nm, which is still several years down the road.  To that end, tick-tock is not dead, but merely stretching out.

The Long March to Power: Intel’s Assault on Battery Life Final Words


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  • jimmy$mitty - Thursday, September 3, 2015 - link

    Is it your love of AMD that makes you say this? Think about it. The XB1 uses DDR3 for its GPU. This will use DDR4. The XB1 has a small eDRAM cache. Skylake has a small eDRAM cache. The XB1 has a very weak AMD Jaguar based CPU. This will have a much stronger Skylake based CPU.

    So why is it so far fetched to think that Skylake could get close to matching the XB1? It wont outright beat it, not this one maybe the next one, but it could get close with proper optimizations and DX12.



    Haswell beat the top end AMD APU at the time and Broadwell makes the current A10 look even worse.

    AMD is great if you are on a budget. But if you are looking simply for performance they are lagging behind in a lot of ways.
  • JKflipflop98 - Sunday, September 6, 2015 - link

    Ah, I wondered who would make an actually well-reasoned posting. I am not surprised to see it's you. Reply
  • tipoo - Wednesday, September 2, 2015 - link

    I didn't say it was a good value. Just interesting how times have changed, that Intel integrated graphics are this close to a two year old console already. Reply
  • eddman - Thursday, September 3, 2015 - link

    Yes, they "could" care less. Reply
  • MobiusPizza - Friday, September 4, 2015 - link

    As ArsTechnica and TechReport (http://arstechnica.co.uk/gadgets/2015/09/intels-sk... has noted, eDRAM has performance advantage even for people with discrete GPUs Reply
  • anubis44 - Tuesday, September 8, 2015 - link

    "I guarantee it that anyone interested in PC gaming could care less about Intel's IGP as any serious gamer will be getting a Skylake laptop with a Maxwell and next year a Pascal GPU."

    I would argue that anyone interested in PC gaming will avoid laptops like the plague and buy/build a desktop PC so they can replace graphics/ram/CPU easily and pay a lot less for a DX12 card, and on that note, anyone wanting to build a DX12-ready gaming machine right now will be getting a Radeon 290/390(X) series card and skipping Maxwell altogether, as it doesn't support hardware asynchronous shaders.
  • ered - Sunday, February 14, 2016 - link

    Well, when the Macbook gets it, you can stream your screen to the Apple TV connect an Xbox One/PS4 controller and play like you're on console. Having similar graphics and at the same time a computer for school etc. But of course these devices are not competitors to consoles, it's just interesting what is possible. Reply
  • TallestJon96 - Wednesday, September 2, 2015 - link

    You actually make a great point. Despite the fact that on a desktop an i5 paired with a $200 dollar gpu will crush integrated graphics, on a laptop a 72 EU cpu could do some serious work. This paired with ddr4 could kicked integrated graphics up a notch, which is good for everyone, as it raises the lowest common denominator.

    Like you say, it probably won't be long until integrated graphics catch up with the Xbone, especially as they have a CPU advantage in many cases, and with ddr4 they have VERY similar system memory. It'll be a few more years after that til ps4 is caught up with. I would add that tablets will probably catch the xbone before the end of this generation. It could be an interesting future, where games could come to tablet, pc, and consoles simultaneously.
  • Stochastic - Wednesday, September 2, 2015 - link

    "... as it raises the lowest common denominator." That's the important bit. One reason there aren't more PC gamers is simply that there aren't that many people who have modern PCs powerful enough to run today's games. This limits the technical ambition of PC games as developers have to keep in mind the wider PC audience and not just us tech enthusiasts. If integrated graphics can continue improving generation to generation, in a few years time even $600 laptops will be capable of running games at comparable fidelity to the Xbox One. Adding substantive amounts of eDRAM to all integrated GPUs would go a long ways towards making that dream a reality. Reply
  • flashpowered - Wednesday, September 2, 2015 - link

    I am hoping to replace my Arrandale laptop with an ultrabook, and really hope that the 15w or 28w Iris with eDRAM can give me something with a high resolution display and smoother running UI than Retina Haswell/Broadwell. Reply

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