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Dual 7702 CPUs perform worse than single!

Question asked by ralph7d7 on Aug 9, 2020
Latest reply on Aug 31, 2020 by mbaker_amd

Hello everyone. I purchased a supermicro dual mobo with two 7702's. The problem I'm having is that a single CPU installed is significantly outperforming the two when installed together. I've tested this with multi-threading applications like Maya, in which I both rendered and did fluid simulations. The RAM shows up in Windows 10 (512Gb), as well as the 256 threads, when both CPUs are installed. When running multi-threaded tasks the task manager shows all 256 threads active. So on the surface, everything looks like it's working, but the simulation/render times are at least 1/3rd less when just a single CPU is installed.

 

Any ideas what could be causing this?

 

*Note, I did have to fix the mobo's pins on socket 2. It arrived with a couple of pins out of place, but the machine wouldn't boot if the pins weren't aligned, so I can't see how this is a factor?

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