Advise o/c using XFX750i

tribz · 15 Oct 2009 at 18:32

Having some problems o/c using the spec in the signature below. I cant get a stable o'c at say 3.333GHz which is would have thought been quite achievable. My CPU voltage is 1.375, NB is 1.45 and FSB is 1.5. RAM is 2.0 with the timings set to auto. Speedfan says my temps are 35,29,31,30 across the cores at idle. The system will apear stable but after a short bout of gaming, the system resets. This also happened when I had a GTX275 so I dont think its the 5870 below doing it.

Can anyone help with getting a stable o/c
Cheers

tribz · 15 Oct 2009 at 22:11

Good news, its passed memtest so ram is ok and I'm not running it overclocked.
I've reset to defaults and downloaded coretemp. That gave me a VID of 1.1V. I went into the BIOS and the closest I could set was 1.125V so I've set it that. When booted backup tho, coretemp now shows a VID of 1.3! I'm not sure how to read that or its just some weirdry of this mobo (the o/c settings arent really extensive).
I jumped straight in with a FSB of 400 and no boot. I'm now going to try 8.5 x 352 which is a miniscule o/c to start. Should I drop the multiplier downt to 8? Would that be more likely to avoid the holes.

Cheers

tribz · 16 Oct 2009 at 12:57

I think my board may be dodgy. At stock clocks, it locks up within a few moments of running prime 95. I think I might look at getting another board.

tribz · 21 Oct 2009 at 16:31

Just as a follow up to this. Replaced the board with a Asus P5Q Deluxe and hit 3.66 on first go at stock voltages and ran Prime95 fine overnight. Highest temp was 78 but normally was hovering in the 60's during stress test.