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Video card or Power supply?

\015 I have a HP Pavilion a1642x. Its pretty cheap buy i intended to replace certain parts for gaming. So i first got a video card. its a xfx 8800gs pci-e, not the best but good for what it cost. it helped alot but with the default RAM i was very limited. So i bought so kingston RAM 2x1gb cards compared to the default 2x512mb. This helped tremendously in cooling my PC and helping the Video card. i thought ''since its so cool i should try overclocking the graphics.'' So i downloaded ntune,i know about rivertune, and safely raised the juice. After a few tests i found the max without a fail, about 710mhz. After about 1 day i had a crash. At first i thought the bestec fail finally happened but now im not so sure. i unplugged certain things to rule out faulty parts. i tried unplugging the p1 and to my amazment it worked. the led was now static but when i tried plugging it back in it shutdown.then it was the video cards turn. i unplugged the six-holed pci plug and started my computer. i got a loud static beep. i completly removed the card to find my computer booted. So i either fried the card or had a bestec psu fail. any help or opinion is appreciated a dont really need a fix, i just need to know what to replace for sure as im not made of money.\015

Answers :

Well if you overclocked you video card you have to increase your video card voltage by using bios for not having a crash. this could be as well your overclocking problem. try to use your default video card clocks and sea what will happen. it could be becouse your psu is low on power four your computer components.
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