Definitely false. Pentium and Celeron CPUs are on the list (both Core and Atom based) and they have AVX disabled. Best they can do is require SSE4.1/SSE4.2. Of course there are other less talked about instruction sets they might care to enable, but I kind of doubt this has anything to do with it. Requiring UEFI alone basically sets the hard minimum to Sandy Bridge and FX (Technically Phenom can be used in FX boards to get UEFI but I suspect most Phenom systems are BIOS booted). Probably some exceptions to the rule (particularly old Apple hardware, but that's a whole can of worms).dpJudas wrote:The comments I've been reading are saying the cutoff is to target x86-64-v3, but then also only the CPUs that have hardware fixes against spectre/meltdown. Basically they want to be able to compile all exes to use AVX2 (to compete more fairly against the M1 in tests) and remove the performance hit they had to implement in the kernel to prevent all those broken CPUs from getting hacked.
I really can't think of any particular reason that set the cut off to 8th gen Intel and 2nd gen Ryzen. At the very least there should be no difference going back to 6th gen and 1st gen respectively since they're basically the same chip. The side channel mitigations is indeed perhaps the explanation. Having trouble finding any matrix of hardware mitigations by CPU generation, but I don't recall 2nd gen Ryzen having anything over 1st gen in that regard so there still seems to be some amount of arbitrary cut off there. Coffee Lake did do hardware meltdown mitigation so that would at least explain the requirement there.
Personally I expect that the statements that the CPU list is a hard requirement is a miscommunication somewhere, but I guess we'll see how things develop as more information comes available. I'll definitely be surprised if the actual DIY requirement doesn't basically come down to UEFI and perhaps the TPM support. Maybe toss out Phenom and Bobcat and require SSE4.1/4.2. The current requirements make sense for OEM certification, but seem quite arbitrarily aggressive otherwise.
Hey they could totally downgrade to 1809 LTSC (likely illegally) to get security patches until 2029!sinisterseed wrote:This will only anger those bitter people even further and they'll still be staying on 10 past 2025 - and sadly not switch to an alternative either, they'd rather enjoy staying unsupported.