ATI HD6950/HD6970 - Can I change the memory timings?

Discussion in 'Die-hard Overclocking & Case Modifications' started by djjonastybe, Apr 10, 2012.

  1. djjonastybe

    djjonastybe Master Guru

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    GPU:
    HD6950(70) 885/1350
    I was wondering if it is possible to change the memory timings.

    Increasing the overdrive limits doesn't work anymore using software. I was wondering if I could change the memory timings with copy pasting that part into the HD6950 BIOS if there is no GUI editor.

    Does the HD6970 have tighter or looser timings? If they are looser I don't think I can make use of them

    Any ideas if I should try this ? I am a pro in hex editing. Just wondering what kinds of things I can do to my HD6950

    My HD6950 doesn't like the Sapphire BIOS
     
  2. Pill Monster

    Pill Monster Banned

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    Both cards should have the same timings unless the IC's are different...which I doubt.

    Anyway the Overdrive limits can still be extended, are you using Afterburner?
     
  3. Saad

    Saad Master Guru

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    GPU:
    Amd Radeon 6970 crossfire
    you want to increase the limits? why dont you just use the racerx reg hack..it still works with the official 12.3s


    the 6970 has tighter timings..i once flashed a reference 6950 with a 6970 bios..the card ran a lot hotter and i lost the voltage control (since the voltage controller is different)
     
  4. Pill Monster

    Pill Monster Banned

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    That doesn't indicate the timings are tighter.

    The 6970 should run hotter anyway, as it uses higher voltage (1.17 vs 1.10).
     

  5. Saad

    Saad Master Guru

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    yes but the 6970 does have tighter timings...the chips are different as well...the 6950 has chips rated for 5000 while most 6970 have 5500 and some have 6000 chips..and the bios makes the gpu run at 1175mv(hence its hotter) i just need 1085mv to run them at 880/1375
     
  6. Pill Monster

    Pill Monster Banned

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    Well the only way to know for sure is by looking up the part number....I know my card has Hynix chips but don't feel like pulling off the cooler to see the numbers....
     

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