WOW… To me it looks like AM5 got the poo end of the stick with Zen 5. I had a feeling when Zen 5 released on desktop that Zen 5 on server and Workstation would be great. It looks like if Zen 5 on desktop got an upgraded IO Die things could have been different and makes me think AMD does not care as much about AM5 Desktop. Same 16 Cores even though they could have a 32 Core with Zen 5 C. Same IO Die.
With this launch, I was looking earlier to see if the prices for the Genoa or Siena CPUs, but for me to ditch my current Intel E5-2697A v4 platform and switch over – it’ll be at least $2k USD (for the motherboard, CPU, and all new RAM).
sigh…
Sidebar: COMSOL is a multiphysics solver, not just CFD. The benchmarks that are shown here is for both CFD and EM (albeit, it’s using segregated solvers to deal with each physics domain), but still.
It is also nice to see that OpenRadioss is a thing now. So, I’m going to play around with that a little bit.
With Genoa, you were looking at $2k minimum between RAM and MoBo
Reason: You lost 15-30% on benchmarks without each RAM channel populated
When Wendell mentioned EPYC Turin still can’t clock up with both DIMMs filled, that leads me to believe the same still holds true as Genoa was the same way.
For those seriously contemplating builds:
Genoa MoBo’s QML starts at 16GB RDIMM
So your baseline RAM configuration is 192GB and each step up is in 192GB increments.
We’ve gotten memory not on the QML lists by scouring RAM offerings from the big players and finding unlabeled duplicates, but we’ve also been burned playing that game.
I like the 512 bit wide AVX path. This Turin generation might what I upgrade to down the line. Not now, I can not justify to spend that amount of money on a computer who does not pay the bills, but maybe three years down the line I could see myself getting one of those. I hope DDR5 would be a little more reasonable prices by then as well. But Zen5 cores as well as those Zen5c cores seem capable. Luckily it seems Epyc parts become available for much cheaper then their original asking price a few years down the line as soon as the first racks of server are getting cleared out by businesses and datacenters.
I would need to clear it with management but we might very much love to test a workload on an Epyc 9005 system.
We have a particular workload that does not scale well on server hardware as it’s primarily bottlenecked by memory bandwidth.
We would love to see how it runs on 12 channels of faster memory. It might help us find the sweet spot for memory/cpu ratio and space density.