By: Adrian (a.delete@this.acm.org), April 6, 2021 12:01 pm
Room: Moderated Discussions
anon (anon.delete@this.anon.com) on April 6, 2021 10:48 am wrote:
> https://www.anandtech.com/show/16594/intel-3rd-gen-xeon-scalable-review
Good:
The cheaper SKUs are no longer crippled by disabling 1 of the 2 FMA units.
No clock frequency penalty for AVX-256 and light AVX-512 instructions.
For heavy AVX-512 instructions, the clock frequency > 80% of normal frequency.
There are a few SKUs with good price/performance, e.g. Gold 6312U.
Bad:
The cheaper SKUs (Silver & Gold 5000) are crippled by low memory speed.
Hopefully ARK contains mistakes, because it shows even some Gold 6000 SKUs as being crippled by low memory speed.
Very bad:
At the same number of active cores and the same power consumption, the clock frequency is much lower than for Epyc 7003, so the performance is much lower for anything that does not use AVX-512 (the Ice Lake IPC is a little lower than that of Zen 3, so at lower clock frequencies it does not have any chance).
Also the maximum single-core turbo frequency is much lower than for Epyc 7003.
Because of the previous facts, in their presentation Intel has wisely chosen to not show any comparisons with competitors, except the few that could take advantage of AVX-512.
Unfortunately for Intel, they were not able to upgrade Ice Lake Server to the improved manufacturing process used by Tiger Lake (SuperFin) and this handicap has lowered dramatically the competitivity of Ice Lake Server. They have to survive with this until Sapphire Rapids, but at least it is better than Cascade Lake.
> https://www.anandtech.com/show/16594/intel-3rd-gen-xeon-scalable-review
Good:
The cheaper SKUs are no longer crippled by disabling 1 of the 2 FMA units.
No clock frequency penalty for AVX-256 and light AVX-512 instructions.
For heavy AVX-512 instructions, the clock frequency > 80% of normal frequency.
There are a few SKUs with good price/performance, e.g. Gold 6312U.
Bad:
The cheaper SKUs (Silver & Gold 5000) are crippled by low memory speed.
Hopefully ARK contains mistakes, because it shows even some Gold 6000 SKUs as being crippled by low memory speed.
Very bad:
At the same number of active cores and the same power consumption, the clock frequency is much lower than for Epyc 7003, so the performance is much lower for anything that does not use AVX-512 (the Ice Lake IPC is a little lower than that of Zen 3, so at lower clock frequencies it does not have any chance).
Also the maximum single-core turbo frequency is much lower than for Epyc 7003.
Because of the previous facts, in their presentation Intel has wisely chosen to not show any comparisons with competitors, except the few that could take advantage of AVX-512.
Unfortunately for Intel, they were not able to upgrade Ice Lake Server to the improved manufacturing process used by Tiger Lake (SuperFin) and this handicap has lowered dramatically the competitivity of Ice Lake Server. They have to survive with this until Sapphire Rapids, but at least it is better than Cascade Lake.
