*Another OC question

[twiliusbasic]

OK here goes. This is my 1st time at these forums. So far noone has been able to help me :-(. Like the sig says, I have a PX845PEV Pro with the 1.09 bios, a Gigabyte 9700 Pro @ stock, 512mb of Corsair XMS3200, and a B0 2.4ghz at a 533mhz fsb. I can't figure out why the hell I can't stably overclock. I mean sometimes if I'm lucky I can complete 3Dmark 2k1 (and 2k3) with my cpu at 2.7ghz and ram @ 400 and I'll get a nice score (15100-15200), then I'll reboot and do it again and it'll freeze up. Everything performs great at stock and is stable, but most of the time I can't OC. The thing that bothers me is that sometimes it'll work for a while and then it won't. Temps aren't really a prob, they never get above ~50C even in the summer ( I've tried it in the winter, same deal). I know that is warm but it's still safe. I have tried upping voltages (cpu and ddr) but that doesn't really help. I've tried switching bioses, same thing, and lowering mem speeds and easing up on timings, but my mem should handle it anyway. I've read that the PX845PEV Pro is a good OC'er, I've seen that some of you guys here have had good luck w/ it, so I don't think that's the prob. And even though my cpu is a B0, it should still do 2.7 (I have tried it at slower and it still freezes), plus OC'ed it will run CPU-burnin for an hour (haven't tried more) without errors. So, anyone have any ideas? They would be much appreciated. Thanks for bearing with me through the long rant.

William

*edit* oh yeah, I also have an Antec TruPower 430 psu.

 

[Duvie]

Freezes sounds like a possible power issue...List power supply and all the voltages (+3.3,+5,+12, and vcore) at idle speed and load if you can....

 

[twiliusbasic]

Originally posted by: Duvie
Freezes sounds like a possible power issue...List power supply and all the voltages (+3.3,+5,+12, and vcore) at idle speed and load if you can....

ok, MBM says this for my voltages:

Core 0 average - 1.45v
Core 1 average - 1.67
+3.3v average - 3.25 low - 3.14 high - 3.34
+5.00v average - 4.96 low - 4.92 high - 4.97
+12.00v average - 11.74 low - 11.67 high - 11.86

aight, there it is. this is at idle, not load I think (how do I check it while it is at load?)

 

[Duvie]

With prime95 you can have the mbm box open and watch the voltages change....also go to general tab and set the interval to take temp and voltage readings as 5sec or less....

I actually think the voltages look good as I have same board as yours and I get same low +12v from 2.4ghz to 3.3ghz....

Another thing could be the radeon card....make sure fast writes are disabled and maybe even try it at lower then 4x agp....may also get a radtweak program and underclock the video card to rule out heating with it...

 

[twiliusbasic]

Originally posted by: Duvie
With prime95 you can have the mbm box open and watch the voltages change....also go to general tab and set the interval to take temp and voltage readings as 5sec or less....

I actually think the voltages look good as I have same board as yours and I get same low +12v from 2.4ghz to 3.3ghz....

Another thing could be the radeon card....make sure fast writes are disabled and maybe even try it at lower then 4x agp....may also get a radtweak program and underclock the video card to rule out heating with it...

ok then, I have been running Prime95 while at 2.7ghz for like almost an hour now. I just now got " FATAL ERROR: Rounding was .5, expected less than .4". It ran for 1 hour, 5mins. I'll try disabling fast-writes and see if that helps. Could the fact that I have a Rev 1.0 9700 Pro have anything to do w/ my 3Dmark and gaming instabilities while OC'ing? I have agp/pci locked at 66/33 in bios and I am not OC'ing the vid card (yet). Here are the MBM5 readings at load while I ran Prime95 @ 2.7ghz.

LOW HIGH AVERAGE
+3.3 3.12 3.34 3.25
+5 4.95 4.97 4.96
+12 11.67 11.80 11.74

Thanks again, any replies appreciated.

William

 

[twiliusbasic]

nobody? bump...