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Tri-fire 3870 bottleneck?

post #1 of 9
Thread Starter 
Hey guys I am receiving a Sapphire 3870X2 tomorrow () and I was wondering if putting it in CFX alongside my current 3870 (tri-fire) with my rig below would work. I'm mainly concerned about my 5600 causing a bottleneck between all of that gpu power. its oc'ed to 3.2 Ghz but something tells me it just isn't enough.

any thoughts?


also even if it is a bottleneck it isn't that big of a deal because i will be picking up either a q6700 or a 45nm quad come mid-april. so it will eventually be balanced either way, I just want to know if it is even worth it to keep my single 3870 plugged in until then.

thanks
post #2 of 9
Well it'll be cool to see run but yeah that X2 is going to be crying its eyes out. Its still worth leaving the other card in, I mean really, even with the bottleneck, it'll still help a bit.
post #3 of 9
Thread Starter 
ok cool ill keep it in then. just thought id check since its such a massive amount of gpu power suddenly dumped on my poor little 5600. plus i have had some pretty bad bottlenecks in the past and they aren't fun.

thanks
post #4 of 9
So does tri and quad fire work on 580x/3200xpress boards? I never got an official answer on it. For your sakes I hope it is supported.
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Dirty Intel
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post #5 of 9
Well..in your case (with getting a quad and all), its just a matter of time until you have to take out the 3870. As of now, you're bottlenecking your GPUs with your CPU and it'll be the other way around once you get your quad.

It'll only be "balanced" once you get the quad and the 3870 out of there. Have fun with that beast.
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post #6 of 9
Thread Starter 
alright awesome thanks for the help guys. I suppose I will just enjoy my bottleneck for the next couple of weeks till i get my quad and my rampage formula then

and about the 580X chipset working with CFX I am 95% sure it does because my friend said that he got it working. (did the same thing as i am doing right now, only he has a phenom) He said that with the single gpu 3870 you just go into bios and set the pcie16x lane to 8x so all of the 3870s are running at the same bandwidth (because the M2R32 lanes aren't pcie16x 2.0 and the 3870X2 can't run at its normal 16x without them). i thought that made sense so I don't see why it wouldn't work. only thing is that the cards wouldn't be running at full 16x but oh well.
post #7 of 9
I would personally say that the 5600+ would bottleneck 2X 3870s in Crossfire by quite a bit. If u can get 3.5GHz+ on ure CPU, then it wouldnt be a prob.
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post #8 of 9
for tricrossfire its gonna take at least 4.0ghz+ on an intel CPU for it to be totally free of the bottleneck so in your case its gonna be pretty severe
    
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post #9 of 9
Keep the extra 3870 in man, but just have it running dedicated to 24x crossfire AA
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