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8800GT squealing and artifacting? - Page 3

post #21 of 38
Thread Starter 
Ok, I have managed to reproduce the problem. Basically because its very hot here now I have downclocked my CPU from 3.4GHz to 3GHz to keep the CPU temperature in the safe zone.

When I change the CPU speed and reboot and then go into Windows and run ATITool I get tons of artifacting or if I run a game, my PC locks up.



What is causing this?

If I switch the PC off and switch it back on after a couple of minutes, the graphics card works fine. An hour of ATITool and no artifacting.
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post #22 of 38
I see your problem right there man. You're running too small of a PSU. Granted this also appears to be a graphics card issue as well...I would say RMA your card, and buy a bigger PSU. 430w isn't enough to push an 8800GT AND overclock your processor to the extend you've done. You need more power .
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post #23 of 38
Thread Starter 
Quote:
Originally Posted by pioneerisloud View Post
I see your problem right there man. You're running too small of a PSU. Granted this also appears to be a graphics card issue as well...I would say RMA your card, and buy a bigger PSU. 430w isn't enough to push an 8800GT AND overclock your processor to the extend you've done. You need more power .
Thanks for the info but my system is rock solid even when the CPU is at 3.4GHz with the 8800GT. It is only when I change the CPU clock speed and reboot that I get the graphics problems, otherwise its fine
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post #24 of 38
Thread Starter 
Sending the PNY 8800GT back to the store for a refund and getting the BFG 8800GT OC instead which has 10 years warranty instead of PNY's 3 years. It only costs £10 more anyway.
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post #25 of 38
BFG has lifetime warranty . As well as EVGA and XFX.
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post #26 of 38
Squealing is perfectly normal.
post #27 of 38
Thread Starter 
Quote:
Originally Posted by Sonic View Post
BFG has lifetime warranty
Not in Europe they don't. Its 10 years.
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post #28 of 38
Sqealing is the sign of a bad/damaged cap. I've RMA'ed an 8800GT for sqealing as well.

edit: also your PSU should be fine. Your system probably only draws about 300w under load, even with the OC. At stock you would be looking more like 240-ish. Well within the capabilities of that PSU.

As a matter of fact, most PSU's reach their max efficiency at about 60-80% load, so if you buy too large of a PSU for your system just to follow the PSU overkill crowd, you aren't loading it to its intended level and actually are using more power from the wall socket than if you run a PSU properly matched to your system, such as yours is. I will be switching to a quad, and will be running a W/C loop, hence the reason I have a 600w unit.
Edited by iandh - 5/11/08 at 5:27pm
post #29 of 38
the PSU is the most important part of your computer...if you get some cheap your crap...you have a chance f-ing your hardware...which I would take a really good PSU anyday to keep my Hardware from not being strained of power.

But I would RMA the card anyways and get a new PSU
post #30 of 38
Thread Starter 
But my Antec EarthWatts isn't a cheap PSU.
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