OC problem

[juicebykurt]

Hey guys. I got a new HSF (VANTEC AeroFlow VA4-C7040) today and when I first installed it my CPU temp dropped from 53 to 41 degrees. I was extreemly pleased with the results so I decided to OC my 1.2Mhz TB. I read some reviews and knocked it up to 1.4Mhz (10x140mhz) and my temp only went up to 43 degrees. I ran some tests and it was stable. Then I decided to raise it to 1.6Mhz (11x145mhz). It wasn't stable at this speed so I brought it back down 1.4mhz and left for a while, figuring it would be okay since I already tested this setting. I came back to a BSOD. The temp broke 60 degrees and set off the thermal protection on my mobo. I then reclocked my cpu to the factory default but it was still getting hot at around 55-60 degrees. I took off the HSF and cleaned the cpu die and the copper core and reinstalled the HSF with atric silver. It's a little cooler now at a steady 55 degrees. This is no where near the 41 degrees I origionally had. Anyone have any suggestions? I've never had a CPU react to OCing like this before...

Specs:
1.2Mhz AMD TB 266mhz FSB
2 @ 256MBs PC2100
Shuttle AK31v3
Gainward Ti200 128MB
2 @ 40GB Maxtor 7200rpms
Lite-On CDRW
Linksys NC100 Ethernet card
300Wt PSU

 

[kanute]

What were the case temps during the different times? Ambient temp could make quite a difference in CPU temp. If your case themp was 25 C when you were getting the low reading, but 36 C when you got the higher reading, that could account for the difference. Also, does the fan seem to be running at the same speed? I have heard of a few people having problems with the TMD fan on that heatsink performing inconsistantly. Last, did you happen to raise your vCore when you OCed it, and forgot to lower it back down when you went back to the slower settings? Other then that, there is no reason why the CPU would run hotter after having OCed it when you go back to stock speed. There has to be some other factor affecting temps.

That oughta void your warrenty!

 

[juicebykurt]

I reset everything back to default after I OC'ed just to make sure I didn't miss anything like that. So, the voltage is set correctly.

I've remounted my HSF several times and even tried my old one again and now it's running right at 48C idle. I got this with my old and new HSFs. I've tried Artic Silver and the generic stuff that came with the new HSF. I should be getting temps in the upper 30s with this HSF. As far as the systems temps go, I didn't record exact numbers but I haven't moved my case and my room temp is pretty constant so I doubt that's the problem. I guess I'll RMA this HSF unless I can squeeze out some more ideas...

 

[kanute]

Is that a 1.2 Ghz T-Bird CPU? If so, then getting temps in the 30C range is gonna be pretty tough. The high end T-Birds were the hottest of the athlons pretty much. Before I just built my barton system, I had a 1.2 Ghz t-bird OCed to 1.4 and I had idle temps of about 47 and load of 55 or so, and that was with a thermalright sk-6 and a delta "make your ears bleed" 60 mm fan. Something tells me that maybe those initial readings you got were just inaccurate.

That oughta void your warrenty!

 

[juicebykurt]

Interesting, thanks for the input. I knew these cpus ran hot but I've seen tons of people get great results with this HSF, so I expected a little more out of it. However, after burning it in over night it's now down to 45C idle. That's only 4C over what I initially got before the OC problem. So, I guess I can live with that.

 

[CarlosTheJackal]

Oh man that 60mm Delta screamer was a BITCH! I had one and my tv has never had to be so loud. The neighbours were complaining cos I had to ramp the tv volume up so much to try and hear it over that monster.