Intel will release Lakefield in 2 SKUs: Core i5-L16 G7 and the Core i3-L13 G4. The i5 CPU will run at a base clock of 1.4 GHz and a turbo of 3GHz, though this uses just to the single Sunny Cove CPU – multi-core turbo is minimal to 1.8 GHz. The i5 has 64 EUs (the very same width as Ice Lake), however a much lower GPU frequency of just 500 MHz; the Core i3 has 48 EUs however the very same 500 MHz GPU frequency. Wide and sluggish, instead of small and fast, is plainly the power- conserving order of the day.
TDP on these chips is 7W, with support for LPDDR4-4267, which will keep the lower-clocked Ice Lake GPU fed. Mobile Ice Lake only runs up to LPDDR4-3733, making this a 1.14x boost.
Both the single Sunny Cove and the quad-core Tremont have access to a 4MB last- level cache, though Intel hasn’t confirmed if that’s L2 or L3. Lakefield uses Foveros, Intel’s 3D interconnect technology, to tie the entire core together and connect the different CPU cores. According to Intel, workload moving is dealt with by the OS however assisted by information from the underlying hardware. Specific information on how this hand-off occurs or when the OS understands to spin up the Sunny Cove core versus the Tremont cores are still unknown. We do know that Lakefield is anticipated to rely primarily on its Tremont cores; the Sunny Cove CPU core exists for UI latency and user interactions.
AVX-512 does not appear to be supported in Sunny Cove, which may be a good thing in the context of trying to keep to a 7W power usage window. AI workloads are probably run on either the CPU or GPU, however, there’s no specific co-processor to manage them.
It’s not clear yet what we should anticipate from Lakefield or how well it will identify itself from existing low-power Intel items. The business has actually had a hard time separating on power usage prior to; Core M didn’t produce a really clear identity for itself prior to being mostly subsumed back into Intel’s existing item lineup.
Lakefield utilizes something more similar to Nvidia’s old “Companion Core” concept for Tegra, just in reverse – instead of having a single low-power core for light workloads, Intel has a single high-power core to deal with the heavy lifting. We’ll see if the various approach yields various results when hardware like the Samsung Galaxy Book S, Lenovo ThinkPad X1 Fold, and Microsoft Surface Book Neo become available.