Sapphire hd 7870 oc cannot use overclock

Hello, I can't even use the overclock on my 7870 without my screen getting artifacts and coloured lines and black screens. The card works fine when clocked down to stock speeds, but I paid for an overclocked card.

Thanks for your help!
12 answers Last reply
More about sapphire 7870 overclock
  1. what program are you using?
  2. It crashes on everything I play.
    Empire total war
    Napoleon total war
    cities xl 2012
    medieval 2 total war
    stronghold 3
    shogun total war
    tropico 4
    mount and blade
  3. Sirsweed said:
    It crashes on everything I play.
    Empire total war
    Napoleon total war
    cities xl 2012
    medieval 2 total war
    stronghold 3
    shogun total war
    tropico 4
    mount and blade


    have you tried raising the voltage?

    aah mount and blade, one of my all time fav games
  4. I tried raising the voltage but it still crashes.
  5. i would just live with the stock clocks, it's a pretty powerful card anyways
  6. I have it at the voltage I got it at and the card is still messed up.
  7. try contacting sapphire, they will be able to address your issue if anyone can
  8. ok thanks for your advice.
  9. oc is different for every card..maybe you are not that lucky.,,,
  10. Not entirely sure why the card cant support the factory overclock, I guess take it back to where you got it and get a replacement.

    I have the Sapphire HD7870, and have overclocked fine.
    Here's the settings if you want them (Using MSI Afterburner)
    Core Voltage: 1237mV
    Power limit: 0%
    Core Clock: 1150Mhz
    Memory Clock: 1375Mhz (equates to 5500Mhz in reality)

    That is running stable for me with no noticeable artifacts or oddities. Though of course, the limits of overclocking is individual to every card.
  11. manofchalk said:
    Not entirely sure why the card cant support the factory overclock, I guess take it back to where you got it and get a replacement.

    I have the Sapphire HD7870, and have overclocked fine.
    Here's the settings if you want them (Using MSI Afterburner)
    Core Voltage: 1237mV
    Power limit: 0%
    Core Clock: 1150Mhz
    Memory Clock: 1375Mhz (equates to 5500Mhz in reality)

    That is running stable for me with no noticeable artifacts or oddities. Though of course, the limits of overclocking is individual to every card.


    0.0 how much performance boost do you see? lol
  12. I'm planning to test it out on a different computer to see if the problems continues. If so I'll ask for a replacement.
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