Some further clarification has emerged relating to the latest Intel Rocket Lake leaks. The suggestion is that the upcoming 14nm CPUs, set for a 2021 launch, will come that includes the new Willow Cove core architecture quite than simply one other respin of the identical getting old Skylake design Comet Lake goes to function.
That’s probably nice information contemplating the consternation that met reviews that Intel could be sticking with the 14nm manufacturing course of for our desktop CPUs till 2021. With the superior Sunny Cove core design solely being rolled out to the 10nm cell Ice Lake chips, and the subsequent Willow Cove replace being aimed toward the 10nm Tiger Lake laptop computer components, there was the concern that any future chip rendered on 14nm was nonetheless going to function the historic Skylake core.
The Sunny Cove core architecture was launched at its Architecture Day this time final yr, introduced as the 10nm successor to its 14nm design for each Core and Xeon processors. But to this point it has solely arrived in cell type inside Ice Lake chips, with the Sapphire Rapids Xeon server components anticipated someday.
There has, nevertheless, been no suggestion that Intel would back-port the new core architecture to its 14nm lithography for introduction onto the desktop. Until now… The Rocket Lake specs leak we reported on beforehand claimed that it could use the identical 256-bit model of AVX as Comet Lake (a by-product of Skylake), however it has now appeared that was an error in reporting these specs.
Here’s the correct translation:
“Apologies, made mistakes copying the spec. RKL-UP3/S should be AVX-512.”
“In plain language: RKL = 14nm version of TGL, minus iTBT, with weakened IGD”
“Plus changed VRM scheme to SVID.” pic.twitter.com/B8pRLOnB7f
— RetiredEngineer® (@chiakokhua) December 2, 2019
A correct translation of the put up on ptt.cc clarifies that it’s going to certainly be utilising AVX-512 and can due to this fact be a 14nm model of the Tiger Lake processor architecture, which itself is ready to use the Willow Cove replace to Sunny Cove. There are caveats, nevertheless, as the poster claims that Rocket Lake will come with out iTBT – Intel Thunderbolt, in all probability not Turbo Boost Technology – and have a weakened built-in graphics part.
That final was beforehand prompt by the indisputable fact that Rocket Lake was reported as sporting simply 32 EUs in its model of the Gen12, Intel Xe GPU design, considerably lower than the 96 EUs of Tiger Lake.
But why is Sunny Cove and Willow Cove an thrilling addition to desktop processing? Mostly as a result of of the touted IPC improve that it has launched to the 10nm components. According to Intel the IPC improve of the Sunny Cove architecture is between 15% and 18%. With Willow Cove probably enhancing on that it’s not inconceivable to anticipate possibly one thing in the area of no less than a 20% IPC enhance for Rocket Lake over Comet Lake.
When it was initially designing Sunny Cove Intel probably didn’t anticipate to nonetheless be wanting to 14nm for its flagship merchandise by 2021, however the battle it’s had getting the 10nm lithography in a match state for public consumption has severely prolonged the life of the 14nm course of.
These latest leaks do throw up an entire lot of questions, nevertheless, principally based mostly round the indisputable fact that it seems as if Rocket Lake will faucet out at eight cores regardless of the previous Comet Lake era providing up to ten cores of processing energy. And if that was all Intel provided that might really feel like a significant backwards step, particularly with AMD providing an increasing number of cores in each successive era of its Zen CPUs.
This may be as a result of of the issue in back-porting the 10nm-based Sunny/Willow Cove design to the 14nm course of. The further efficiency Intel has wrung out of the 10nm Ice Lake chips has come from the truth it has that increased transistor density, permitting it to do issues like multiply the cache on supply to every core. And with Willow Cove the cache ranges are set to rise once more, and on a 14nm course of how will Intel give you the option to match up to 10 cores in the identical area as the customary Skylake design if it wants to many occasions extra cache on die?
Presumably that’s one of the causes extraneous options, comparable to Thunderbolt, are being axed from the Rocket Lake design, simply to make sure that the cores have as a lot area as potential.
Either approach, the suggestion is that the increased core-count half in that era wouldn’t be based mostly on Rocket Lake and could be produced on a special platform altogether. Maybe that’s one of the causes Intel has introduced down the pricing of its Cascade Lake HEDT lineup in anticipation…