AMD 6670 overclocking problem BSOD!

[peiri]

i have recently purchased AMD radeon 6670. i can overclock it slightly ex:GPU clock 850mhz memory 885mhz
but when ever i try to over clock it to GPU clock 900mhz(max) and memory 1000mhz and start a game i get BSOD
need some help/advice

Thanks

 

[wolfram23]

You can change the voltage through the GPU Bios, but I highly recommend NOT doing that.

When OCing a GPU, take it 1 step at a time. Do not increase Core and Memory speeds at the same time. Start with memory and increase it 5mhz at a time (with the Core at stock settings). You already know how high you cannot go, so perhaps start decreasing from there. I would think the Memory is causing the BSODs, but it may be the Core.

Anyway, when you reach the stable limit of Memory speed, then increase the Core speed in the same fashion.

As stated, just because CCC has higher speeds "available" doesn't mean they are reachable. You are only guaranteed that the card can work at stock speeds, anything higher takes patience to figure out.

Anyway, a 6670 is a pretty low end card. You'd do a lot better just getting a 5770/6770 (same card) or 6790 (or anything more expensive than those lol)

 

[purple stain]

Really, you can adjust the GPU Voltage in the BIOS? What setting is it usually called?

I've seen voltage adjustments for the PCI-E lane or controller but not the card itself.

 

[wolfram23]

I don't mean the mobo BIOS, but the GPU BIOS (aka VBIOS). You need to use Radeon Bios Editor (RBE) which can be downloaded from Techpowerup.com.

However, it's entirely possible that the 6670 VRMs simply can't output a different voltage, but for cards that are able to, you can do it through the VBIOS. Of course this means you then have to reflash the GPU with the new BIOS which is always a bit of a risk.

Again, highly NOT recommended!

 

[purple stain]

Yah, flashing a GPU is much more risky than flashing a motherboard.Their is no reset switch on GPU BIOS if you mess up so if anything goes wrong you can't use the card anymore.