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Putting in a second 7950

By Hamfish
Jul 5, 2013
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  1. Hey guys I have decided that I'm going to buy a second 7950 and I am wondering what I have to do to install it correctly when I already have one installed
  2. Spykezxp

    Spykezxp TechSpot Booster Posts: 144   +23

    Check your power supply to make sure it can handle the additional 7950. For a system using two Radeon HD 7950 graphics cards in 2-way CrossFireX mode, AMD specifies a minimum of an 700 Watt or greater power supply. The power supply should also have a combined +12 Volt continuous current rating of 46 Amps or greater and have at least four 6-pin PCI Express supplementary power connectors.
  3. JC713

    JC713 TechSpot Evangelist Posts: 6,864   +889

    What are you system specs? You need a PSU that can handle xfire like Spykexp said. Also, you need a motherboard that can run 2x 7950s @ x8 + x8.
  4. Hamfish

    Hamfish Newcomer, in training Topic Starter

    I have a thermaltake 750w bronze certified power supply ( can't remember the exact model, I'll check it when I get home) and a asus sabertooth 990fx r.2 motherboard

    I'm pretty sure I my computer can handle it it's just my worry is what I have to do to get the card running properly in crossfire with the other

    Ok my psu is Thermaltake smart series Sp 750m
  5. Blkfx1

    Blkfx1 TechSpot Addict Posts: 887   +171

    That MOBO is fine. It allows for Dual x16 links for SLI/CFX. As for the PSU, it should also be fine. It's not most reputable brand when it comes to PSU's but it should get the job done.
    hellokitty[hk] likes this.
  6. JC713

    JC713 TechSpot Evangelist Posts: 6,864   +889

    Yeah, you can easily xfire.
  7. St1ckM4n

    St1ckM4n TechSpot Evangelist Posts: 3,452   +620

    ...Make sure you use the crossfire bridge.
    JC713 likes this.
  8. JC713

    JC713 TechSpot Evangelist Posts: 6,864   +889

    Sometimes you screw up the simplest things xD.
    St1ckM4n likes this.


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