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Intel Discloses Lakefield CPUs Specifications: 64 Execution Units, up to 3.0 GHz, 7 W

Intel Discloses Lakefield CPUs Specifications: 64 Execution Units, up to 3.0 GHz, 7 W

Over the previous 12 months, Intel has slowly began to reveal details about its first hybrid x86 platform, Lakefield. This new processor combines one ‘massive’ CPU core with 4 ‘small’ CPU cores, together with a hefty chunk of graphics, with Intel getting down to ship a brand new computing type issue. Highlights for this processor embrace its small footprint, as a result of new 3D stacking ‘Foveros’ know-how, in addition to its low standby SoC energy, as little as 2.5 mW, which Intel states is 91% decrease than earlier low energy Intel processors. Right this moment’s announcement is available in two elements: first, the specs.

Intel will debut these two SKUs in its first technology of Lakefield. These CPUs will discover properties in premium, always-connected laptops, such because the Samsung Galaxy Book S anticipated in markets this month, the Lenovo ThinkPad X1 Fold, coming later this yr, and within the Microsoft Surface Book Neo.

Each SKUs will characteristic one massive ‘Sunny Cove’ CPU core, together with 4 little ‘Tremont’ Atom CPU cores. Each units of cores could have entry to a Four MB final degree cache, though Intel has not but disclosed what kind of cache that is.

In the meantime on the graphics entrance, Intel is integrating a Gen11 GPU with 64 execution items, the identical variety of EUs as on Intel’s Ice Lake processors. Apparently, the iGPU is clocked about half as excessive as typical for an Intel GPU, with clockspeeds peaking at simply 500 MHz – suggesting that Intel goes vast and gradual to extend graphics efficiency. Each CPUs will likely be rated for a TDP of seven W.

Intel Lakefield Processors
AnandTech Cores Base
Freq
1C
Turbo
nT
Turbo
Gen11
IGP
IGP
Freq
DRAM
LP4
TDP
i5-L16G7 1+4 1400 3000 1800 64 EUs 500 4267 7 W
i3-L13G4 1+4 800 2800 1300 48 EUs 500 4267 7 W

Intel confirmed to us that the bottom frequency is the unified frequency throughout all 5 cores, and the only core turbo frequency applies solely to the large Sunny Cove core. Assist for LPDDR4X-4266 is a notch above the reminiscence controller in Ice Lake, which solely runs at LPDDR4X-3733, and the reminiscence velocity will doubtless be a giant increase to efficiency.

In an effort to allow these processors in a small 12mm x 12mm footprint, Intel is utilizing its 3D stacking know-how, referred to as Foveros. Which means the logic areas of the chip, such because the cores and the graphics, sit on a 10+ nm die, whereas the IO elements of the chip are on a 22nm silicon die, and they’re stacked collectively. In an effort to make the connections work, Intel has enabled 50 micron connection pads between the 2 silicon halves, together with power-focused TSVs (via silicon vias) in an effort to energy the cores on the highest layer.

Intel lists the TDP for these chips at 7 W, though the corporate has not disclosed the turbo energy limits for the chip. As talked about above, Intel hasn’t disclosed how the cache works. Within the preliminary diagrams, we have been proven that PoP reminiscence can be added on prime, and whereas Intel hasn’t provided additional particulars there, we all know from final month’s Samsung Galaxy Ebook S reveal that there will likely be (at the least) 8GB SKUs utilizing LPDDR4X.

We have now massive questions as to how every of the cores will work, provided that by default they assist completely different instruction units – Intel hasn’t offered info on this presently. Intel has acknowledged that the scheduling of the threads on the completely different elements of the CPU will happen based mostly on hardware-guided OS scheduling, though once more Intel hasn’t gone into the main points of its {hardware} monitoring and enablement on how that is finished. Within the demos now we have seen, Lakefield will use the Tremont cores for nearly every little thing, and solely name on the Sunny Cove core for user-experience sort of interactions, similar to typing or interacting with the display screen.


Lenovo ThinkPad X1 Fold

Intel is planning a post-announcement briefing for press to ask questions, which implies that this announcement is coming in two elements. That is the data we’re being given beforehand, and we’ll replace you with the main points from the post-announcement briefing. As a part of this course of, we’ve exclaimed to Intel how this manner round of presenting particulars to the press is irritating – firstly for readers, as you all should come again if you wish to discover out what extra Intel tells us later as we speak, however secondly for us, as press, who should scramble to leap on the main points and resolve whether or not to jot down quick and miss particulars, or write gradual and miss the wave of site visitors.

One factor we will verify prematurely – the Sunny Cove doesn’t look like AVX-512 enabled. Intel’s preliminary press launch states that AI workloads happen on the CPU; given the additional energy draw required for AVX-512, that is most likely a very good factor.

Extra info out of Intel’s post-announcement press-briefing will come later as we speak.

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