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New Graphic card doesn't work but old one stil does.

So i decided to upgrade my graphics card from an XFX 7850 to the XFX 7870. i installed the new graphics card and nothing happened. The Mother board is getting power but when I press the power button nothing happens at all. I tried removing a stick of RAM i tried unplugging the dvd drive and seeing if i could get some more power. But still nothing whatsoever. I then reinstalled the old graphic card and everything booted up just fine. I don't know if its the power supply or maybe the motherboard not recognizing my Card. Here are the specs.

Phenom ii x4 955 black
8gb RAM
700w KDM PSU
2 Seagate HDD
1 LG DVD drive.
8 answers Last reply Best Answer
More about graphic card work stil
  1. why didn't you include the PS in your description?

    you did hook power to the card and you did reinstall drivers?
  2. Like swifty said, make sure that it is plugged into the PSU, you need at least two 6-pin PCI Express supplementary power connectors.

    Also, did you un-install the old card drivers 1st?
  3. No I didn't.So I absolutely have to uninstall the old drivers? I did list the Powersupply.
  4. I have one PCI-E connector and am using an adapter for the second.
  5. Best answer
    Timothy Walker said:
    No I didn't.So I absolutely have to uninstall the old drivers? I did list the Powersupply.


    Yes. Uninstall the old drivers. This will fix your problem most likely ;)
  6. Worked like a Charm Thank you so much!
  7. Timothy Walker said:
    Worked like a Charm Thank you so much!


    No problem. If It help, picked the reply as best solution.
  8. Timothy Walker said:
    Worked like a Charm Thank you so much!


    your welcome!
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