During a time of increased competitor activity, Intel has decided to disclose some of the high level details surrounding its next generation consumer processor, known as Rocket Lake or Intel’s 11th Gen Core. The new processor family is due in the market in the first quarter of 2021, and is expected to share a socket and motherboard compatibility with the current 10th Gen Comet Lake processors, providing an upgrade path even for those with a Core i9-10900K, Intel’s highest performing desktop processor to date. New 500-series motherboards are also expected to be available.

The new Rocket Lake-S silicon or SoC is going to be known as ‘Cypress Cove’. Intel confuses itself in the press release compared to the PDF presentation, as the press release dictates that this isn’t the core – it specifically states that the core microarchitecture is Ice Lake (Sunny Cove). However the presentation PDF says Cypress Cove is the core. In this instance, to be clear, Sunny Cove and Cypress Cove are set to be practically identical, however Sunny Cove is on 10nm and Cypress Cove is the back-ported variant on 14nm.

Paired with these cores will be the Tiger Lake graphics architecture, known as Xe-LP, which is also being backported from 10nm to 14nm for this product. The combined 14nm representation of Ice Lake cores and Xe-LP graphics is what is going to be known as Rocket Lake, (at least one of) the SoC(s) of the 11th Gen Core family.

With the new processors, Intel is targeting a raw instruction-per-clock uplift in the double digit range, which would be similar to the uplift we saw moving from Comet Lake to Intel’s Ice Lake mobile processors. Because of the node difference, the exact IPC change is likely to be lower than what we’ve seen before, but 10%+ is still highly respectable, especially if Intel is also able to maintain the high frequency it has achieved with the current generation of Comet Lake.

One of the benefits of moving to a back-ported Sunny Cove core will be the inclusion of the AVX-512 vector acceleration unit in Cypress Cove. This enables Intel to enable its library of Deep Learning Boost technologies for AI and ML acceleration, including support for Vector Neural Network Instructions (VNNI), finally bringing AVX-512 to the desktop platform.

However, to mix and match the right combination of core count, graphics, and AVX-512 for die size/yield/cost, it appears that Rocket Lake-S will only offer a maximum of eight cores in its largest configuration. Within the press release PDF, Intel stated that the current silicon as tested is rated for 125 W TDP, with a top turbo boost of 250 W, which matches what we see on the Core i9-10900K already. There’s no escaping the performance-per-watt characteristics of the process node, which indicates that Intel might find hitting those high frequencies a little easier with fewer cores to deal with. Intel is also promoting new overclocking tools with Rocket Lake, however did not go into details.

Another feature that Intel has disclosed with Rocket Lake is the move to PCIe Gen 4.0 on the processor, with up to 20 lanes available. These are likely to be split into one x16 for graphics and one x4 for storage on most motherboards, and this aligns with what we’ve seen on the latest generation of Intel Z490 motherboards, some of which have already promoted support for PCIe 4.0 ‘on future Intel processors’. This means Rocket Lake. Intel also mentions that the memory controller now supports up to DDR4-3200, however the projected performance numbers were done with DDR4-2933 memory.

On the graphics side, moving to the Xe-LP graphics architecture is going to be a big uplift in graphics performance, with Intel suggesting a 50% improvement over current Comet Lake integrated graphics. It is worth noting here in the slide that Intel mentions ‘UHD Graphics ft Xe Graphics Architecture’ – this would perhaps point to a scaled down version of Xe compared to Tiger Lake. I’m fully expecting to see only 32 EUs here, as a balance between die area, power, and performance. In the fine print it suggests that there will be some versions of Rocket Lake without the integrated graphics enabled, similar to the F processors we see on the market today.

That being said, for those units with integrated graphics, Intel is promoting new media encoders and display resolution support, with up to 4K60 12-bit for 4:4:4 HEVC and VP9, or up to 4K60 with 10-bit 4:2:0 AV1, showcasing AV1 support for mainstream processors. Display resolution support has also increased, with up to three 4K60 displays or two 5K60 displays, supporting DP 1.4a (with HBR3) and HDMI 2.0b.

This was an unexpected news announcement this morning - speaking to peers it all seems to be a bit of a surprise - perhaps even for the PR teams, given that the system configurations as 'projected' in the slide above is dated 6th August, almost 3 months ago. It will be interesting to hear if Intel will disclose more details ahead of launch.

Source: Intel

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  • sing_electric - Thursday, October 29, 2020 - link

    I think energy/heat's got to be a factor: You're already facing significant tradeoffs between thermals, clock and maxing out the cores without the graphics on, and adding more cores would just add more heat to the equation. Better to have "dead space" with disabled graphics than to add cores that couldn't run at full tilt anyways. Intel's apparently already going down to a max of 8 cores from 10, even though there's likely room on the die for all 10 for this exact reason.
  • movax2 - Thursday, October 29, 2020 - link

    "back-ported" to 14 nm.

    Though "double digit" uplift was for 10 nm.
  • Everett F Sargent - Thursday, October 29, 2020 - link

    Read the fine print ... their numbers are all in binary ... so that 00-to-11 is a 3% improvement (but in Intel language that would be a double digit improvement) and 000-to-111 is a 7% improvement (but in Intel language that would be a triple digit improvement). ;)
  • movax2 - Thursday, October 29, 2020 - link

    there are 10 kinds of people: those who understand binary and those who don't
  • SanX - Friday, October 30, 2020 - link

  • Spunjji - Thursday, October 29, 2020 - link

    I'll be interested to see the die size numbers for this - especially compared with 8 core Tiger Lake. We'll finally get a marginally better idea of the relative densities of their processes.

    Looks like a solid upgrade path for anyone who bought into Z490, which is a nice change. Definitely good for gamers already using a solid water-cooling chip. That turbo TDP, though... Ouch!
  • drothgery - Thursday, October 29, 2020 - link

    Though less than perfect, because 8 core Tiger Lake undoubtedly will have at least the iGPU from 4-core Tiger Lake, which is relatively a lot bigger than what's going in Rocket Lake.
  • Spunjji - Friday, October 30, 2020 - link

    Last I'd heard, TGL 8-core also uses a 32 EU Xe GPU - presumably because it's headed for larger devices that can benefit from a dGPU. That may have just been a rumour, though.

    Either way, TGL has larger caches than the cores in Rocket Lake - so it'll never be a perfect comparison. I'm betting it will reveal fun things about 10nm++ / SF density, though.
  • phoenix_rizzen - Thursday, October 29, 2020 - link

    So they're continuing with the 2 separate CPU architectures per generation?

    10th gen == Comet Lake (14 nm) or Ice Lake (10 nm)
    11th gen == Rocket Lake (14 nm) or Tiger Lake (10 nm)

    Because that's not going to be confusing. It was bad enough when it was limited to laptops, but now it's going to be on desktops too. Would be nice if they used different names for each, instead of Lakes for both 14 and 10 nm variants.

    On the bright side (?) they'll at least both have the same iGPU architecture, so you won't have to choose between better CPU (Comet) or GPU (Ice), you'll just have to choose the number of CPU cores you want: up to 4 (Tiger) or up to 8 (Rocket).

    The "Intel Decoder Ring" is really starting to get unwieldy... Wonder just how bad the model numbering is going to be for these. At least with Comet vs Ice you could look for the "G#" at the end to know you're getting Ice Lake with upgraded graphics. How are they going to differentiate things now?
  • mooninite - Thursday, October 29, 2020 - link

    I completely agree with you. It's impossible to figure out what an Intel CPU is anymore without looking it up in the Ark.

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