Can't OC CPU with 5870 installed

[mystikl]

I've recently bought a used 5870 to use for mining, and when I tried to OC my Q6600 I noticed that it doesn't even let me enable host clock control in BIOS, it just restarts with it disabled. I've been told it's the PSU but before I shell out 100$ on a new PSU I want to be sure.
Could it be from the motherboard? it's a GA-P31-DS3L, and it would be a hell of lot cheaper to just get a used mobo.

 

[biostud]

What PSU do you have?

 

[mystikl]

A 425W Hiper Power.

 

[VirtualLarry]

Neither your board nor your PSU is any good for overclocking, sorry.

 

[mystikl]

Neither your board nor your PSU is any good for overclocking, sorry.

That's just it, I can overclock to 3Ghz @1.25V with a 7750 instead of the 5870. It seems it's from the motherboard, as I've found similar cases were USB devices or video boards would cause the same issue.

 

[Smoblikat]

That's just it, I can overclock to 3Ghz @1.25V with a 7750 instead of the 5870. It seems it's from the motherboard, as I've found similar cases were USB devices or video boards would cause the same issue.

Right...........but a 7750 use much less power. Your PSU is of poor quality and probobly puts out about 250 - 300w max.

 

[mystikl]

After flashing just about every BIOS revision on the motherboard, and trying various settings I found that it will boot with host clock control enabled but only with Thermal monitor enabled which for some reason sets the multiplier to 6. I guess the motherboard and the GPU just don't play well together.

 

[Rast]

sell that card and get better psu

 

[Bubbleawsome]

Here. http://www.newegg.com/Product/Produc...82E16817182068

 

[mystikl]

After a little more digging I discovered that this issue sometimes happens to Gigabyte P3x and P4x boards. It happens when replacing the processor or adding a new GPU or it can just happen out of the blue. And the great part is there is no solution to this problem.

 

[LagunaX]

I remember having booting up and oveclocking problems when I moved to a 5870 on a 500w Corsair psu. It was just as bad with a 6950 too. Even an Enermax 620w was struggling sometimes. Come 7970 the power consumption came down. That's why I stick to 750w or higher to cover all of my overclocking and gpu's.

 

[Net Prowler]

that psu probably isnt rated 80 plus bronze or anything like that. the gpu alone pulls 188watts on load, thats more than half the output i would resasonably expect with your psu. get at least a 650, preferably a 750 watt if overclocking.