Has anyone tried this trick with Ryzen (Win7/8/10)?

How do you know which 4 are active and which 4 are disabled?
 
RAutrey said:
This. Need to isolate one of the CCX's.
Click to expand...

Does the option exist in the BIOS/UEFI for any of the AM4 motherboards? Also, does anyone know how they are organized in the BIOS/UEFI? If Windows is having issues with thread scheduling, it is quite possible that the OS is not differentiating between the cores/SMT cores in any meaningful way, therefore the Windows method may not be reliable, but it also shouldn't hurt for someone to test it out.
 
MrCaffeineX said:
Does the option exist in the BIOS/UEFI for any of the AM4 motherboards? Also, does anyone know how they are organized in the BIOS/UEFI? If Windows is having issues with thread scheduling, it is quite possible that the OS is not differentiating between the cores/SMT cores in any meaningful way, therefore the Windows method may not be reliable, but it also shouldn't hurt for someone to test it out.
Click to expand...

Yep. It does exist in UEFI and has been tested
4+4 > 4+0 > 2+2

So scheduler improvements could help 4+4 mode potentially but its still better than 4+0
 
ecmaster76 said:
Yep. It does exist in UEFI and has been tested
4+4 > 4+0 > 2+2

So scheduler improvements could help 4+4 mode potentially but its still better than 4+0
Click to expand...

Yes, but 4+0 being 10-15% better than 2+2 despite half the L3 cache points to some decent performance improvements available if they can work out the thread scheduling so a thread doesn't move across CCX's.

That said, those should have been ironed out before launch and the fact that they weren't doesn't make me too hopeful that they'll be fixed quickly.
 
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