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I had some extra time on my hands and went about testing performance differences with wow-64.exe using spoofed CPU ID's using Vmware and found some startling differences.
In laymans terms this is reporting an AMD CPU as an Intel Core I7 to wow-64.exe
Without further ado here are the WOW performance tests done on a Interlagos 8C/16C vs Core I7 3960X with spoofed CPU IDs.
No CPU ID change:
AMD --> 76min/102max
CPU ID spoofed:
AMD --> 127min/162max
Im not sure exactly how you guys optimize the compiler in terms of intel vs amd but the results are rather interesting.
Edited by Urgfelstorm on 2/22/2012 11:21 AM PST
Edited by Northernlite on 2/22/2012 12:29 PM PST
Why is the fps for the Intel CPU lower with CPUID spoofed? Are you comparing native vs. vmware performance? Or are you spoofing the CPUID to a CPU that doesn't support SSE / AVX, resulting in slower performance from a fallback to x87 FPU math?
If your non-spoofed results are for native, then you're also benching virtualization performance, aren't you?
Also, IDK if you have vmware set up give the VM exclusive direct access to the vid card with VT-d, or if you're using the host system's gl / dx11 drivers. 2500k and 2600k CPUs don't support VT-d, unlike the non-K non-unlocked versions, but I haven't checked on sandy-bridge E.
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