Custom Search
Join the PC homebuilding revolution! Read the all-new, FREE 200-page online guide: How to Build Your Own PC!
NOTE: Using robot software to mass-download the site degrades the server and is prohibited. See here for more.
Find The PC Guide helpful? Please consider a donation to The PC Guide Tip Jar. Visa/MC/Paypal accepted.
Results 1 to 7 of 7

Thread: HD 6790 In Crossfire Mode.

  1. #1

    HD 6790 In Crossfire Mode.

    I realise some games run crossfire better than others, but I was wondering what kind of increase I would get with x2 HD 6790's running in crossfire? Oh, and on a 16x @16x and 16x @4x PCIe slot? so 16x and 4x with x2 6790's. Please no suggestions about other cards and such either.
    Ive got an
    FX 4100 CPU @ 3.6Ghz
    500Gb Seagate barracuda hardrive
    2x4Gb of corsair Vengeance RAM
    Asrock AM3+ 970 Extreme3 board
    Antec 900Watt HCG Power supply.

    -thanks

  2. #2
    Join Date
    Jan 2004
    Location
    Here
    Posts
    10,462
    You will no doubt see an increase but a 6970 will be bottlenecked by the x4 slot. If it were x8 you would be fine, but x4 is going to choke it.
    8.1 Pro 64bit
    AMD FX 8350
    Asus Sabertooth 990FX R2.0
    24GB GSkill/Corsair 1866MHz
    2x XFX 6870 1GB
    SSD - OCZ V4 128GB/Kingston 120GB
    HDD - 3TB/2x 750GB/500GB/250GB
    Corsair TX850M
    Cooler Master HAF 932 Red
    CM Hyper 212 EVO w/2x SickleFlow 120mm Red
    12x BD-ROM
    Logitech X540 5.1 Surround
    2X Acer 23" LED - Eyefinity: 3840x1080
    Microsoft Sidewinder x4 KB

    "The significant problems we face cannot be solved at the same level of thinking we were at when we created them."
    - Albert Einstein

  3. #3

    Wink Acctaully....

    Quote Originally Posted by jlreich View Post
    You will no doubt see an increase but a 6970 will be bottlenecked by the x4 slot. If it were x8 you would be fine, but x4 is going to choke it.
    Haha, Alot of people get this wrong, I ment the 6790, not the 6970. It will only be a 6790 on the 4x slot, so a relatively slow card

  4. #4
    Join Date
    Jan 2004
    Location
    Here
    Posts
    10,462
    Ahh, my mistake. Guess my eyes wanted to see 6970. No issues then.

    I have been seeing some issues with the latest drivers in crossfire though. I am using 11.12 drivers and CAP's (catalyst application profile). Still a bit buggy, but way better than 12.3. The biggest issue seems to be the 12.3 CAP, but even just the 12.3 driver and 11.12 CAP was still not very good.
    8.1 Pro 64bit
    AMD FX 8350
    Asus Sabertooth 990FX R2.0
    24GB GSkill/Corsair 1866MHz
    2x XFX 6870 1GB
    SSD - OCZ V4 128GB/Kingston 120GB
    HDD - 3TB/2x 750GB/500GB/250GB
    Corsair TX850M
    Cooler Master HAF 932 Red
    CM Hyper 212 EVO w/2x SickleFlow 120mm Red
    12x BD-ROM
    Logitech X540 5.1 Surround
    2X Acer 23" LED - Eyefinity: 3840x1080
    Microsoft Sidewinder x4 KB

    "The significant problems we face cannot be solved at the same level of thinking we were at when we created them."
    - Albert Einstein

  5. #5
    Join Date
    Jan 2010
    Location
    Vancouver, BC
    Posts
    2,769
    i run in crossfire and have no issues with that driver (12.3) as it seems to play all games with great scaling.............heard there was some issue with it but not here................
    but.......x4 will lose some of the productivity of having Cfx 6790's
    Win8.1/HAF X/CM 1000W/Z77X-UD5H/OC'ed 3770k @4.2GHz/32g G Skill/OC'ed GTX780 @1063MHz-6608MHz/Vertex3 120g/WD 500 Blk/WD 1T Blk
    Win7/CM Centurion/650W/Z77X-UD3H/OC'ed 2500k @ 4.1GHz/16g Kingston/HD6870/Vertex2 90g/WD 500 Black
    Win7/modded mid-case/725W/TA785G3+/Athone 2 x 4 640 OC'ed @3.442 GHz/8g Kingston/HD6870/WD 500 Blk/WD 1T Blk

    doesn't keep me up nights, no siree

  6. #6
    Join Date
    Jan 2004
    Location
    Here
    Posts
    10,462
    I didn't notice any issues with 12.3 running a single card.

    I didn't crunch the numbers but x4 shouldn't hurt a 6790 too much at all I wouldn't think.
    8.1 Pro 64bit
    AMD FX 8350
    Asus Sabertooth 990FX R2.0
    24GB GSkill/Corsair 1866MHz
    2x XFX 6870 1GB
    SSD - OCZ V4 128GB/Kingston 120GB
    HDD - 3TB/2x 750GB/500GB/250GB
    Corsair TX850M
    Cooler Master HAF 932 Red
    CM Hyper 212 EVO w/2x SickleFlow 120mm Red
    12x BD-ROM
    Logitech X540 5.1 Surround
    2X Acer 23" LED - Eyefinity: 3840x1080
    Microsoft Sidewinder x4 KB

    "The significant problems we face cannot be solved at the same level of thinking we were at when we created them."
    - Albert Einstein

  7. #7
    Join Date
    Jan 2010
    Location
    Vancouver, BC
    Posts
    2,769
    should be OK with that gpu card as it will not saturate x4............just sometimes with x16 in the first slot and x4 in the second slots, wanky things have been known to happened.........better to have a x8x8 than x16x4........but both should work
    Win8.1/HAF X/CM 1000W/Z77X-UD5H/OC'ed 3770k @4.2GHz/32g G Skill/OC'ed GTX780 @1063MHz-6608MHz/Vertex3 120g/WD 500 Blk/WD 1T Blk
    Win7/CM Centurion/650W/Z77X-UD3H/OC'ed 2500k @ 4.1GHz/16g Kingston/HD6870/Vertex2 90g/WD 500 Black
    Win7/modded mid-case/725W/TA785G3+/Athone 2 x 4 640 OC'ed @3.442 GHz/8g Kingston/HD6870/WD 500 Blk/WD 1T Blk

    doesn't keep me up nights, no siree

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •