Will a Phenom x4 955 Bottleneck Two 7870s

Hey guys how's it going, first time on these forums hopefully not my last :)

so I've got a bit of a debate. I recently bought a sapphire 7870 OC edition and it's been running pretty nice but I would love to add another one in another month or two once prices drop a bit more. My problem is, I have a feeling my phenom x4 955 BE running @ 4.0 will bottleneck the whole system, especially considering the main game I play is BF3.

So here are my options. Right now I have a mobo (gigabyte ga-970a-d3) that only has one pcie 16x and one 4x so that automatically has to go since there will be a huge performance drop in cf. Should I a) buy a whole new intel mobo + an i5 3550k but then have to wait several months before getting another 7870 ? or b) just get a new amd mobo, keep the phenom, and buy the 7870 faster. I am running it with a corsair ax850 psu so I am good to go in that respect.

in short, will my phenom x4 955 @ 4.0 bottleneck two 7870s !?

thanks
13 answers Last reply
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  1. Crossfiring at 16/4 isn't going to net you a massive difference in fps,
    the 955 at 4GHz shouldn't hold it back on a 16/16 or 8/8 mobo, but I wouldn't bother on a 16/4
    You could throw a bulldozer chip in there and a 79xx card though,
    or the best option is the Intel route and wait for a second card
    Moto
  2. Oh I know a 16x 4x CF won't do much that's why I am automatically upgrading motherboards regardless. It's just the fact that if the phenom x4 can handle 16x/16x CF (although I don't know what the price point is for motherboards that can do that, would it be $200 mark? ) all I need to do is buy a mobo + 7870 ,rather then mob + cpu + 7870.
  3. I have a PII 975 rolling two 6950 2Gb's at 16/16, no issues here :)
    Theres a couple of Am3+ Plates Here that have 16/16 available from around $120
    http://www.newegg.com/Product/Product.aspx?Item=N82E16813157281 is a nice one
    Moto
  4. WOW $120 ?!


    What's the catch....


    So your phenom has no problem with two 6950s ? No bottlenecking what so ever ? this is great news if true
  5. I play WoW (When I'm not modding the hell out of my rig)
    and at 3.6GHz on the chip, stock settings on cards as well I pull about 120fps in stormwind city
    Any game-ometer, yougamers etc I use gives me great scores for gfx, I'm sure the Cpu holds things back at higher stress levels, but on one monitor 1680x1050, its never going to see that level
    Moto
  6. Probably no bottleneck, but, I don't see the point of buying a new motherboard just to ad another video card, you should have just added the cost of a new mobo and bought a faster video card from the start.
  7. Motopsychojdn said:
    I play WoW (When I'm not modding the hell out of my rig)
    and at 3.6GHz on the chip, stock settings on cards as well I pull about 120fps in stormwind city
    Any game-ometer, yougamers etc I use gives me great scores for gfx, I'm sure the Cpu holds things back at higher stress levels, but on one monitor 1680x1050, its never going to see that level
    Moto



    Hm very very interesting, so my best bet it just to stay with the amd build I guess ? Rather then drop almost $500 on a whole new intel build ?

    and what do you think about this:
    http://www.newegg.com/Product/Product.aspx?Item=N82E16813157266

    is it cheap quality ?
  8. geekapproved said:
    Probably no bottleneck, but, I don't see the point of buying a new motherboard just to ad another video card, you should have just added the cost of a new mobo and bought a faster video card from the start.



    I spent $400 and that was pushing it at the time. Like I said I don't plan on buying another for another few months. plus two 7870s is probably faster then a 680.
  9. I prefer the one I linked, its prettier hehe (and cheaper)
    the other one looks like my 890fx, those northbridge heatsinks are 2 inches high and they will possibly be an issue with your cooler, but it looks the same as my 890fx, (I W/Cool so Nb Hs not a problem for me)
    Nope, AsRock are a great brand and you could make it even cheaper by going for an 890 chipset board, unless the 990 has features you need?
    Moto
  10. Motopsychojdn said:
    I prefer the one I linked, its prettier hehe (and cheaper)
    Nope, AsRock are a great brand and you could make it even cheaper by going for an 890 chipset board, unless the 990 has features you need?
    Moto



    my build is all blue and black so i like mine better ^.^ hehehe

    The only features I really need/want is usb 3.0 and 2 pcie slots to run at 16x/16x. other then that just want a board that lasts me a long time.


    would cf 7870s beat a single 680 ?
  11. Best thing there is to google 7970Crossfire vs 680 and check out some reviews/ opinions
    I have a nightshift to get ready for so i'm out till tomorrow mate, sorry :)
    Moto
  12. all good sir thanks a lot !! have a good one
  13. most 890fx and 990fx have x16 x2 This is what I have http://www.msi.com/product/mb/890FXA-GD70.html#/?div=Detail
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