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Performance dramatically increased after disabling half my cores

K

Keller1

Weaksauce
Joined
Dec 10, 2013
Messages
65
After enabling "One core per module" option in the bios, some games and windows perform much faster than they would normally perform.

Civilization V: ~30% shorter load times.
The Talos Principle : Playable.
Smite, League of Legends, Dota - No random FPS dips.
Edit: Dolphin now runs games stably at 60 fps.

This were my test results so far, but i'll be trying out more games. has anyone else ran into this issue? Is it fixable? What causes it?

The system is running Windows 8.1.
FX-6300 @ 4.31Ghz.
Radeon HD7950.
AssRock 970 Extreme4 Mobo
SSD Boot Drive.
HDD Games Drive.
 
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Perhaps your overclock isnt as stable as you hoped.
You are now producing less heat and performance has stabilised.

Try enabling all cores again with a lower overclock.
 
I've prime95'd this overclock for about 20 hours so i'm pretty confident in it's stability, however i did try it at stock and got the same result.Then i underclocked to 3.5. Same result.

Other than the limited number of games there are certain applications that run better on 6 cores.

Lemme run some benchmarks.
 
Even if it's stable the overclock will have the chip generating more heat. If you have turbo mode enabled that won't work as well given that it has less headroom to play with. I've never overclocked a bulldozer arch chip though so I don't know what the process is and if turbo gets disabled along the way.
 
How do you rate your performance based on game + hardware reviews?
Are you getting expected performance when using 1/2 cores, or does performance exceed that?
 
Do you have APM Master Mode disabled in the BIOS? If not the chip throttles itself to stay within it's rated wattage, with half the cores disabled the chip could be reaching higher clockspeeds for longer.

IIRC testing early on with Bulldozer generally found less than 10% IPC improvement from one-core-per-module mode. I haven't seen much about it since.
 
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