why wont my 4870's OC like they used to

[mcmeat51]

my powercolor used to OC to about 840/1100


I now have a sapphire aswell, and I hve put TIM 0098 on the cores and also on the vrm's and ram under the pads to aid in cooling (which it has done).

I know the sapphire is 'another card' but it runs cooler than my powercolor and im sure i tested it on its own and it did it fine.

However I cant (even with upping the voltage to ~1.3V get above 820 on both without artifacts in atitool. or crashing.

I have also tried upping the PCI ref clock, but to no avail.

Any ideas?

does VC1 traffic support and ASPM make a difference?

cheers guys

Matt

[varrius]

The GPUs degrade over time.

[mcmeat51]

!!!! really that quickly? they have not been OCed all the time, just for a few games and benching

[Rattle]

diff drivers?

[Bradan]

Different ambients, drivers, BIOS etc. can change OC %.

[mcmeat51]

yea thought as much... damn that xtra 40mhz or so really made the difference!

[Bradan]

yea thought as much... damn that xtra 40mhz or so really made the difference!

:p: Sure feels like it, doesn't it?

[mcmeat51]

think i may hve to get a 955 to make up for it !