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README.md
CometLakeFspBinPkg
These FSP binaries are intended to be used with 10th Generation Intel® Core™ processors and chipsets formerly known as Comet Lake. They are not intended to be used with 10th Generation Intel® Core™ processors and chipsets formerly known as Ice Lake.
Comet Lake Binary Differences
There are different variants of the Comet Lake FSP intended for different 10th Generation Intel® Core™ (formerly Comet Lake) SKUs. Please consult the table below:
| Directory Name | 10th Generation Intel® Core™ (formerly Comet Lake) SKU Description |
|---|---|
| CometLake1 | U-Series & H-Series processors with support for LPDDR3 & DDR4 memory |
| CometLake2 | U-Series processors with support for LPDDR4 & DDR4 memory |
| CometLakeS | Desktop processors with a 14nm Platform Controller Hub (PCH) |
| CometLakeV | Desktop processors with a 22nm Platform Controller Hub (PCH) |
Differentiating CometLake1 and CometLake2
CometLake1 and CometLake2 can be differentiated by checking the CPU Family, Model, and Stepping data. This can be done by setting the value of EAX=1, executing a CPUID instruction, and storing the value of EAX. CometLake2 has a value of EAX=0x000A0661, CometLake1 has a value of EAX=0x000A0660 or 0x000806EC.
Processor numbers cannot be used to determine the difference between CometLake1 and CometLake2. For example, some Intel® Core™ i7-10710U processors are CometLake1 and some Intel® Core™ i7-10710U processors are CometLake2. An indirect method of differentiation is checking if the system's RAM is LPDDR3 or LPDDR4; this method fails if the system RAM is DDR4 however. CPUID checks are the only reliable mechanism to differentiate them.
Differentiating CometLakeS and CometLakeV
The desktop processors work in any LGA1120 socket; therefore the difference between CometLakeS and CometLakeV is the Platform Controller Hub (PCH). Motherboards with a 14nm Platform Controller Hub (PCH) use CometLakeS. Motherboards with a 22nm Platform Controller Hub (PCH) use CometLakeV. At time of writing, the following Intel® 400 Series Chipsets use 22nm fabrication:
- Intel® B460C Chipset
- Intel® H410 Chipset
For all other Intel® 400 Series Chipsets, use CometLakeS. For the Intel® B460 Chipset use CometLakeS.
Comet Lake Y-Series
Comet Lake Y-Series processors use AmberLakeFspBinPkg. Amber Lake FSP version 3.7.6 or later is required for Comet Lake Y-Series support. For all other Comet Lake processors, please use CometLakeFspBinPkg.