Help overclocking graphics card

Danbuscus25 · Apr 27, 2014

Ok, so i am trying to overclock my graphics card (Radeon HD 6670 1gb gddr5) and i have tried many different overclocking tools, like msi after burner, sapphire trixx, i tried amd overdrive, and nothing lets me change the voltage (well, sapphire trixx lets me lower it, but nothing higher than stock of 1.1v), and i have tried a lot of things: first, with msi afterburner, i enabled the voltage changing in the settings, and changed the .cfg file aswell, no luck, even with latest version. sapphire trixx works just fine, but i cant raise the voltage above stock. amd overdrive doesnt have an option to raise the voltage, and i even tried this trick you can do in the registry to unlock voltage control: http://linustechtips.com/main/topic/89360-cant-adjust-gpu-voltage-msi-afterburner/ followed the instructions for changing the registry 100%. I have the latest drivers, and the only thing i can possibly think of is re-flashing the vbios, but i would like a couple more opinions. thanks!

chris987 · Apr 27, 2014

with such gpu you should be satisfied with a several mhz increase, stock voltage can provide.that gpu doesnt have the cooling capacity or the components (vrm-capacitors...) to withstand such stress.also i wouldnt mess with the gpu firmware cause you may brick it.

Danbuscus25 · Apr 27, 2014

hmm, well i have been able to achieve a core clock from 800mhz to ~1050, but only ~960 stable, and memory from 1000mhz to ~1150 stable with temps under 65c under stress test. from what ive read, this is an impressive OC at stock voltage.

chris987 · Apr 27, 2014

Danbuscus25 :

yes...it is impressive...also keep in mind that any gpu with no supplementary power is restricted to the 75w pci-e slot can provide.making it draw more power would only cause problems!

Danbuscus25 · Apr 27, 2014

right, but how much more power in watts would it need if it went from 1.1v to 1.2v? is there even a way to tell? this card maxes out at 66 watts as is.

chris987 · Apr 27, 2014

Danbuscus25 :

actually 6670 has a 44W TDP so you wont be able to even reach 75W. but as we said it isnt the only restriction

Danbuscus25 · Apr 27, 2014

huh, somewhere in my system i saw max power draw 66 watts. anyways, ill see how much performance i can get without extra voltage, i only want to change the vbios if i really need it, and it seems safe.

chris987 · Apr 27, 2014

Danbuscus25 :

well 66w it is to be expected with such o/c done on your gpu.you are almost making the most out of that chip.

Danbuscus25 · Apr 27, 2014

lol, i like to make the most out of my system because the games i play can run on max settings, but with lower AA and some lag in some maps and situations, which just drives me nuts that im so close to max settings but not quite there >.<

chris987 · Apr 27, 2014

with that gpu any anti-aliasing method, on any amount, shouldnt be an option. it really cripples performance on even greater hardware.

Danbuscus25 · Apr 27, 2014

yeah, i can usually have AA at 2x, but that chips away about ~8 fps.

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Help overclocking graphics card

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