TechSpot

Crossfire 7950's

By Hamfish
Jun 26, 2013
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  1. Hey I was just wandering if I would get much bottlenecking if I got a second 7950 if I have a amd fx 8350. Its usually oc to 4.5 so that may also help.
    I currently have 1 7950 and I am thinking of upgrading but not sure if it is worth it or not
     
  2. GhostRyder

    GhostRyder TS Evangelist Posts: 2,260   +541

    Go For it, im running an FX-8350 at 4.7ghz, and I have Dual HD 6990's, trust me, two 7950's will not be bottlenecked.
     
  3. JC713

    JC713 TS Evangelist Posts: 7,018   +912

    The 8350 is the highest end AMD CPU. It may not perform as well as an Intel, but it wont bottleneck at all. Just make sure your motherboard supports SLI/xfire.
     
  4. slh28

    slh28 TechSpot Paladin Posts: 1,925   +170

    Don't worry about bottlenecking from the CPU. What you should be worried about (as JC touched on) is your mobo - you need to make sure that the PCI-E bandwidths won't be bottlenecking your cards when in CF. Also make sure you have enough space between the PCI-E slots, I.e. if there's only 2 slots between them then a 3-slot cooler design card won't fit.
     
    JC713 likes this.
  5. JC713

    JC713 TS Evangelist Posts: 7,018   +912

    Yeah, for all we know, you may have a microATX board. What motherboard do you have?
     
  6. Blkfx1

    Blkfx1 TS Addict Posts: 890   +171

    Yeah, depending on your MOBO bandwidth could be an issue. You'll want dual link 16x or 8x. Anything lower will bottleneck the performance.

    Also, you'll want to make sure your PSU is up to the task. Something 650- 700W or more should do the trick.
     
  7. Hamfish

    Hamfish TS Rookie Topic Starter

    Hey I have a asus sabertooth 990fx r.2
    I also have the Saphire oc 7950 and it looks like it blocks the 2nd slot
     
  8. JC713

    JC713 TS Evangelist Posts: 7,018   +912

    There are 3 PCIe 2 slots that can run at x16 + x16 or x16 + x8 + x8. You should be fine if you use 2 PCIe slots far enough apart.
    http://www.asus.com/Motherboards/SABERTOOTH_990FX/#specifications
     
  9. Hamfish

    Hamfish TS Rookie Topic Starter

    Ok sweet thanks for the help. And is this upgrade worth it
    Btw I play games like bf3 and crisis 3 mainly
     
  10. JC713

    JC713 TS Evangelist Posts: 7,018   +912

    This upgrade is definitely worth it if you wish to play Crysis 3 at max settings @ 60 FPS @ 1080P.
     


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