Intel is Now Fusing Off AVX-512 support in Alder Lake CPUs

[windwhirl]

On the desktop? For what? Office? Web Surfing? Games?

RPCS3 supports AVX512, last I heard

 

[Deleted member 24505]

RPCS3 supports AVX512, last I heard

Tried this, works fine on my CPU/980ti

 

[R-T-B]

On the desktop? For what? Office? Web Surfing? Games?

N-body simulation in KSP using principia mod. Compiled with avx512 support you can get quite a few more vessels on the map then without.

Fact is, a lot of games could benefit. But it's a chicken and the egg problem, and product segmentation makes it only worse. Devs won't add support until it's mainstream, etc.

This actually makes Rocket Lake more appealing to me than Alder Lake, lol.

 

[looniam]

so does this make my RKL purchase not as regrettable?

 

[R-T-B]

so does this make my RKL purchase not as regrettable?

I'd certainly be more likely to be in the used market for it someday...

 

[ThrashZone]

Glad i still have the option for it on my 12700k

Hi,
Don't believe I've ever seen bios avx 512 offset ever kicking in at any level I've ever used.

 

[Frank_100]

On the desktop? For what? Office? Web Surfing? Games?

Mathematica uses it.
R uses it.
If you write any optimized code on an Intel machine and use an Intel compiler or just link to an Intel Library (i.e. MLK, Performance Primitives) it will try to use AVX-512.
Probably Intel wants to sell Xeon's to the I9 consumers.

 

[Deleted member 24505]

Hi,
Don't believe I've ever seen bios avx 512 offset ever kicking in at any level I've ever used.

Well the chip still has it, seems only later ones will be fused off. Whether i can or will ever enable it is another matter.

 

[ThrashZone]

Well the chip still has it, seems only later ones will be fused off. Whether i can or will ever enable it is another matter.

Hi,
I'd have to look at the description of what avx 512 offset set at auto actually does lol

 

[bug]

Mathematica uses it.
R uses it.
If you write any optimized code on an Intel machine and use an Intel compiler or just link to an Intel Library (i.e. MLK, Performance Primitives) it will try to use AVX-512.
Probably Intel wants to sell Xeon's to the I9 consumers.

Well, the software you described belongs mainly to a workstation. Requiring a workstation CPU isn't all that outrageous.

 

[quadibloc]

I have always thought that AVX-512 was the one important feature that would allow Intel CPUs to be so superior to AMD CPUs as to blow them away. So I was pleased to see Intel finally bringing competition back to the CPU marketplace - after AMD brought so much competition, what with Intel's 10nm woes, that the lack of competition traditionally present turned around in the other direction.
So I see this as Intel shooting itself in the foot. Yes, the efficiency cores don't support AVX-512. So there should be a software solution.

 

[bug]

I have always thought that AVX-512 was the one important feature that would allow Intel CPUs to be so superior to AMD CPUs as to blow them away. So I was pleased to see Intel finally bringing competition back to the CPU marketplace - after AMD brought so much competition, what with Intel's 10nm woes, that the lack of competition traditionally present turned around in the other direction.
So I see this as Intel shooting itself in the foot. Yes, the efficiency cores don't support AVX-512. So there should be a software solution.

The idea is fine (I mean, who can argue more instructions aren't better than fewer of them?). The problem is AVX512 is so complex to implement, it eats a significant part of the die area, area that could be used to speed up other non-specialized things instead. And it's also power hungry. So hungry that using AVX512 on one core, will cause other cores to throttle.

Perhaps Intel should do what they did back in 80386 days and put these instructions in a co-processor again.