When I put the stock card in my HP m8120n it works, but the card is terrible. When I change to either me ATI or Nvidia card I get 3 beeps in the post test. There is no way both of them went bad at the exact same time, when the nvidia one wasn't in a pc, and my ati was working just days ago.
The 3 short beeps indicates a video card memory problem.
The video card uses video RAM that is part of the video card. Try reseating the video card and if the problem is not resolved then the fault is the video card and it needs to be replaced.
You could have two faulty video cards. There is nothing on the video card to reset.
Does the motherboard had a built-in video? If so go into the BIOS and disable the on-board video, then insert the video cards to see if it works.
Try to borrow another video card to see if it works, if not you could have a faulty AGP slot in the computer, you may have to go for an older PCI video card.
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I had the computer running with the ATI Radeon 3870 and the Nvidia 8800 GTS before that. One day my computer froze and so I powered down and started up again. But in the post test it did 3 beeps. I tried using the Nvidia card again but same thing. I then decided to try the original card that came with the computer, no idea what it is, and it turns on fine. So I tried the other ones again, no luck. I have cleaned the pc several times with compressed air/vacuum/brush and still nothing.
I had the computer running with the ATI Radeon 3870 and the Nvidia 8800 GTS before that. One day my computer froze and so I powered down and started up again. But in the post test it did 3 beeps. I tried using the Nvidia card again but same thing. I then decided to try the original card that came with the computer, no idea what it is, and it turns on fine. So I tried the other ones again, no luck. I have cleaned the pc several times with compressed air/vacuum/brush and still nothing.
Both of them go at the same time? Isn't that a little weird, especially since the nividia has been sitting in its box? How do I reset the video card?
Did you try disabling the on board graphics in the bios? Look for lint, dust, or debri in the slot. If you can check the voltage at the video card connection from the power supply.
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