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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  • tipoo - Tuesday, September 1, 2015 - link

    The bit of eDRAM on even ultrabook parts may be one of the more exciting bits of Skylake. Should bring baseline performance up significantly, even with half the eDRAM of the Pro 5200. Reply
  • tipoo - Tuesday, September 1, 2015 - link

    That 72EU part also comes shockingly close to XBO GPU Gflop numbers, which, while not directly comparable, means integrated graphics will catch up to this gens consoles very soon.
  • RussianSensation - Wednesday, September 2, 2015 - link

    But it's irrelevant in the real world for 5 reasons:

    1) Intel's best CPUs don't focus on IGP (i.e., i7-6600K, 6700K, 5820K-5960X) which means someone who is interested in gaming is buying a dedicated i5/i7, especially K series and going for a discrete graphics card.

    2) Since we are discussing PC gaming, not console gaming, a budget gamer is going to be better off getting a lower end discrete GPU like the $90 GTX750Ti or even going on the used market and buying a $100 HD7970/GTX670, instead of trying to play games on Intel's 72 EU part.

    3) Looking at historical pricing of Intel's parts with eDRAM, they'll probably cost almost as much as the Xbox One/PS4.

    4) No one buys an Xbox One/PS4 because they want the best graphics. If you want that, you build a Core i7 + GTX980Ti SLI/Fury X CF system. People buy consoles for ease of use, to play online with their friends, and to have exclusives. In the areas the consoles excel, a 13-15" PC laptop with a 72 EU Intel part will fail miserably in comparison to the gaming experience one would get on a PS4/XB1 + large TV in the living room. Frankly, these 2 devices aren't competing with each other.

    5) Overall cost of the device - a $300 Intel CPU is worthless without a motherboard, ram, SSD/HDD, keyboard, etc. That means trying to compare how fast an Intel's CPU with 72 EUs and EDRAM is vs. an Xbox One and PS4 and ignoring the Total System Cost is misleading.

    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.
  • HideOut - Wednesday, September 2, 2015 - link

    No where in his comment did he mention same performance and cost. He was merely making an observation. Reply
  • Jumangi - Wednesday, September 2, 2015 - link

    That Intels Integrated graphics can finally match a ten year old console? Big deal... Reply
  • IanHagen - Wednesday, September 2, 2015 - link

    No, that it matches a console released last year. Reply
  • SunLord - Wednesday, September 2, 2015 - link

    I doubt it they might be able to match the spec numbers but actual real world performance will likely still favor the console simply because of the specialized optimizations developers use on consoles vs the more generic options pc games are forced to use thanks to the near infinit hardware combinatiosn one can have Reply
  • tuxRoller - Sunday, September 6, 2015 - link

    There's already a vulkan driver ready for Intel (on Linux) made by lunarg. That will allow for the optimizations needed if the developers care to make them. Reply
  • Jumangi - Wednesday, September 2, 2015 - link

    Ahaha you think this thing will match an Xbox one? Wow the delusion is seriously big with some people. Also the cost of one of these high end Iris Pro CPUs alone will cost more than an entire console or a decent AMD laptop with still better graphics. Reply
  • BillyONeal - Wednesday, September 2, 2015 - link

    Considering both the PS4 and XBO also use integrated graphics solutions from a couple years ago it isn't far fetched. Reply

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