ATI 6870 not overclocking (Low FPS)

[Orpheus]

Originally Posted by Thee_oddball

Nvid cards wont be affected UVD is an ATI program

Ahh right, thanks for the info!

Originally Posted by O_Smiladon

Do you mean powercolor cards ?

I have a HD4890 1 GB powercolor and I am not to sure if I have an a improvment.

It still stutters down low sooooo not sure.

O_Smiladon

Smiladon - no, I mean the ATI Powerplay function:

http://www.amd.com/us/products/techn...ower-play.aspx

All it does is throttle up/down the GPU depending on load. It should detect changes and throttle the card appropriately. The Ubi splash video that plays on startup was locking the card to video speeds (UVD) and the Powerplay function wasn't detecting the return to 3D, so the game was effectively running on half a graphics card.

For ATI cards with the underclocking problem, when running GPU-Z I saw a max clock spike on initial load, then the Ubi splash locks the GPU clock at 400mhz. Removing/renaming the .wmv file solves the problem as there's no transition from 3D to 2D clocks - the game runs at full 3D clock speed.

If you're not sure if you have this issue, run GPU-Z before you load CloD and see how your GPU clocks up. If it's stuck at half clock speeds (400mhz in my case, may differ for different cards), try renaming the ubi splash. Not all ATI cards are affected by this issue, so if your card clocks properly there's no need to do it - but if your card isn't clocking properly, this will solve it & give you a nice performance boost.

[O_Smiladon]

Thanks Orpheus

O_Smiladon

[Phazon]

I recommend all ATI users do this fix regardless of their card model. New drivers may change your card's behaviour to cause you to be affected.

[Blackdog_kt]

Mine definitely clocks properly now, since i'm getting the same "reboot after 40 minutes" that i got when forcing the clocks via Ati tray tools


It's weird because i've never had problems in any other game. I'll try switching it to a different slot so that it gets better ventilation within the case. Failing that, it could be a power supply issue (the leads could be delivering low amperage). I use a 700w thermaltake PSU that i recently got after my previous one died, maybe i have to RMA this one too...it's a good thing the guy i buy from only carries brands with a 3 year warranty

So, just in order to gradually eliminate possible causes and find out what's to blame, if i set GPU-Z to log the parameters to a file does it only log what has been monitored up to the point that i enable the log function and specify the file name? Or does it keep appending to that file for as long as it's running (which would mean it would record up to the point the PC reboots)?

The reason i'm asking is that i need a logfile showing my temperatures at the moment the reboot occurs, this way i can decide if i just need to add an extra case fan or if i should look for other problems. Any ideas?

[RE77ACTION]

You could try to underclock your CPU and/or GPU just a bit to get its power usage down (5 or 10% should already make the difference). This way you could test if your system holds out longer. Of course I've assumed you don't have any heat issues with your case, GPU or CPU. You could also check if the fan of your power supply is working properly.