Intel completely disables AVX-512 on Alder Lake after all

Re:Intel completely disables AVX-512 on Alder Lake after all by flyinghamster on Friday January 07, 2022 @08:03AM (#29838611)

The Core 2 Quad Q8200 was what did it for me. I had intended to build a system to play with virtual machines, only to find after I built it up that the Q8200 didn't have VT-x - something that was NOT noted in the store display.

I put it in an Intel-branded motherboard as well, and that turned out to be one of the few motherboards I've had that failed prematurely.

Since then, the only Intels I've bought since then have been used ThinkPads.

[ Parent | on HN ]

Re:Intel completely disables AVX-512 on Alder Lake after all by timpattinson on Friday January 07, 2022 @09:06AM (#29839220)

to be fair, that's unavoidable with AVX-512, you can't underestimate how much power it draws compared to non-vectorised instructions. That's why Prime95 is such an effective stress test and draws 150% of the power that Cinebench R20 does for example.

[ Parent | on HN ]

Re:Intel completely disables AVX-512 on Alder Lake after all by ncmncm on Friday January 07, 2022 @09:24AM (#29839416)

You can, in fact, underestimate that, and most people who guess do.

[ Parent | on HN ]

Re:Intel completely disables AVX-512 on Alder Lake after all by fomine3 on Friday January 07, 2022 @03:27PM (#29844311)

Unlocked K CPUs didn't support VT-d until Skylake. That was weird segmentation.

[ Parent | on HN ]