4 ms·
That's only if you use all cores 24x7 and all ALUs within those cores (vectorized workloads), which is very unlikely unless you're doing straight up linear alge
by m0zg 7y ago
That's only if you use all cores 24x7 and all ALUs within those cores (vectorized workloads), which is very unlikely unless you're doing straight up linear algebra on the CPU.
In CA there's also the issue of not having electricity in the first place sometimes though. So power _consumption_ seems kind of secondary.
- Dylan16807 7y ago> That's only if you use all cores 24x7 and all ALUs within those cores These chips don't run at a fixed frequency. They dynamically adjust based on thermal limits and power limits. You only have to burden most of the cores/ALUs to hit maximum power. Any load above that threshold uses the same amount of power, as frequencies nudge down to compensate.
- simooooo 7y agoThat doesn’t sound right
- Dylan16807 7y agoWhy doesn't it sound right? Just look at the chart in the article: https://images.anandtech.com/doci/15044/3970X%20Power%20Graph.png https://images.anandtech.com/doci/15044/3970X%20Power%20Grap... The power limit is configured in the BIOS, and can be disabled, but with these massive chips they default to throttling down and capping power consumption so that you aren't forced to go crazy with the cooling system (and motherboard and PSU capacity).
- m0zg 7y agoAccording to the linked Anandtech article, the maximum TDP is reached at ~22 cores fully slammed, yes. But it doesn't drop off much after that. But that's splitting hairs.