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Help! 7800 GT downclocks in 3D!

Forum Graphic & Displays : Graphics Cards - Help! 7800 GT downclocks in 3D!

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I downloaded and installed the 178.24 drivers, and ever since, my video card has been acting sluggish. After clearing the drivers, rolling back the system, and checking other drivers, it's still having problems. I ran 3D Mark 2006, and got half the score I used to get when I built the system.

I ran RivaTuner and found out that after 10 seconds of 3d processing (Core 450 Mhz), the card slows back down to it's 2D settings (275 Mhz).

I don't think it's a heat issue (Card doesn't get over 50 Degrees), and it's exactly 10 seconds every time. I think it's something the driver triggered, but I can't rollback before it was installed, and removing, whiping, and reinstalling older drivers (I think 164 I was using) doesn't seem to help.

Is there another driver cleaner I can use to try? Anyone else hear of any issue like this?

Message edited by bront on 11-05-2008 at 08:46:57 AM

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Bump to keep this on the front page. I need help please.

Reply to bront

You mean when u DLed the 178.24 drivers this happened ? and when u rolled back the the older one u had it still Downclocked ?
Driver cleaner is a good tool.

------------------------------ Q6600@3.4+ TT V1 Cooler,SAPPHIRE HD 4870X2,ASUS MAXIMUS FORMULA,4GB OCZ DDR2 800,LG W2452V 1920x1200
Reply to Maziar

I installed the new 178 drivers, and that's when it started. I rolled back to the older drivers, and that didn't fix it. I used driver cleaner and loaded the older drivers, and that still didn't fix it. I am currently back on the 178 drivers.

Ok, I ran some more tests.

Guild wars runs fine, and the card never downclocks. It also never got hotter than 47 C (44 Idle).

Oblivion downclocked once, but I think it was durring the loading screen. It got the card up to 56 or 57, the downclock happened when it was around 52.

3D Mark 06 downclocks 10-15 seconds into the app. It doesn't seem quite consistant other than in the first scene, it's after the interior of the lander at some point. It downclocks before it gets to 50, but gets up to 52.

Mass Effect downclocks pretty quickly into the game, and generates odd artifacts as well as video hickups. Similar heat profile as 3D Mark 06.

I realy don't understand what's triggering the downshift in speed.

Reply to bront

u may want to take a look @ this:
http://forums.nvidia.com/index.php [...] 33&t=27558

------------------------------ Q6600@3.4+ TT V1 Cooler,SAPPHIRE HD 4870X2,ASUS MAXIMUS FORMULA,4GB OCZ DDR2 800,LG W2452V 1920x1200
Reply to Maziar

I redid a driver scrub, and loaded the 97 drivers ok. I then loaded the 169 drivers, and they ran ok. Looks like the issue is fixed. Annoying though.

Reply to bront

Hope its fixed and btw update your DX

------------------------------ Q6600@3.4+ TT V1 Cooler,SAPPHIRE HD 4870X2,ASUS MAXIMUS FORMULA,4GB OCZ DDR2 800,LG W2452V 1920x1200
Reply to Maziar

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