Overclocking woes

after mustering the courage to oc my card, ive hit a few snags
reading thru older threads for the 8800m gtx i found that
gpu at 600, mem at 900 and shader at 1600 shud be fine, and to a certain degree it is. however after 5 mins of gameplay the fps drops massively. The temperature remained around 58-60C so it cudnt be that.
any ideas?


(ive tried lower speeds and all but there is this random slowdown)

 

Which Drivers are you using?

Check your GPU/Mem/Core speed when the slowdown happens, there is a chance that your card is down clocking itself to half clock speeds...Which I have had happen to me with certain drivers...namely Dox's...for some reason with his drivers, randomly my 8800 will be stuck at 383/400/700....have yet to figure out a pattern with it....but when i use the regular 182.06 mod'ed drivers, it does not happen...but would happen on 181.22, 185.2 and 182.05 from Dox

 

Aaaah
Same thing here man
181.22 DOX Custom V1.1
Stuck at CORE 383 and Mem 300

Always have to reboot

I will install a different driver and see what happens... my temps never go over 70C so I have no clue what the matter is


EDIT: Getting the 185.20 Vista 32bit right now with modded INF so I can install it on my laptop.

 

thanks for the info ,im using dox's 181.20, i will try another driver

 

My 8600m gt use to do the same thing and this was my solution.

1. overclock your card with ati tools and use artifact test to find a safe oc.
2. run 3dmark 06 and make sure it runs normally without crashes. your score should also show inprovement.
3. once you have found a stable over clock, set all sliders ( 2d, 3d low and high) to the overclocked rate.
4. after gaming set your clock speeds to default so your gpu will downclock like normal.

 

Sorry but this wont help :]

Since the OC's are safe our problem occurs right around... 1 :]

So just after a couple minutes of testing anything the driver resets to LOW END 3D settings without overheating, artifacts etc...


Its the drivers we use to OC that are the problem, so your just either wasting time or being too cautious hahaha

 

Read the bold. The driver cant downclock anything because even low 2d performance would be running at your 3d performance clocks.

 

digitydawg,


I can't for the life of me get ATI tools to run on Vista 64...says it can not load the low level driver....any suggestions?

 

You either have to run it as administrator or else allow Windows to use unsigned drivers. I can't remember which fix I had to implement, but I had the same problem on x64 Windows 7.

 

well i realised the drop in fps isnt due to underclocking , but an error with the driver, some thing on the lines of "nvdklm.dll has encountered an error hardware reboot" or something and after that , fps remains down until computer reboot. temps remain well within the nominal range

edit: if it is the driver , can u suggest others ( currently using 181.20)