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Can I run 2x HD 5850 in crossfire on this setup? (i read the FAQ b4)

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January 30, 2012 4:47:38 PM

Hi all,

after reading the crossfire FAQ, I still wanted to be sure that i can run two 5850's on my individual configeration:

Mainboard: P7P55D 1,33MHZ
CPU: Intel i5 @ 2.67ghz
RAM: 8 GB
GPU: 5850 icooler V
Power: 700V

I mainly play BF3 and i want to get at least some 5-10% performance boost to enable MSAA. As far as i researched, BF3 supports crossfire pretty well, doesn't it? I chose crossfire over a new card because of the price (100 € compared to >400 €).


a c 109 U Graphics card
January 30, 2012 4:52:50 PM

What amperages in the power supply?
January 30, 2012 4:58:15 PM

Do you mean whether there are any other devices in my system?
No, only the hardware I listed and some two little ventilators are in my computer, I don't think those will exceed 700 volt?

thanks for the reply so far!
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a b U Graphics card
January 30, 2012 5:23:52 PM

CrossfireNewb said:
Do you mean whether there are any other devices in my system?
No, only the hardware I listed and some two little ventilators are in my computer, I don't think those will exceed 700 volt?

thanks for the reply so far!

You do NOT have a 700 volt powersupply. :ange:  Maybe 700 watts. What we don't know is how many amperes are available on the 12 volt rails of your power supply. If you could list a brand and model, we would be better able to help you. :hello: 
January 30, 2012 5:54:07 PM

clarkjd said:
You do NOT have a 700 volt powersupply. :ange:  Maybe 700 watts. What we don't know is how many amperes are available on the 12 volt rails of your power supply. If you could list a brand and model, we would be better able to help you. :hello: 


okay, i feel totally stupid right now :3

it is "Be Quiet!" 700W!
a c 92 U Graphics card
January 30, 2012 6:06:12 PM

I'd suggest a psu upgrade but other than that you should be able to do 2x 5850.

1 x PCIe 2.0 x16 (single at x16)
1 x PCI Express 2.0 x16 slots (@x4 mode, 2.5GT/s)
2 x PCI Express 2.0 x1 (2.5GT/s)
3 x PCI
Only thing I don't get is that ^^^ on your motherboard. Does it only do pci express x1 when you crossfire???
January 30, 2012 6:19:06 PM

esrever said:
I'd suggest a psu upgrade but other than that you should be able to do 2x 5850.

1 x PCIe 2.0 x16 (single at x16)
1 x PCI Express 2.0 x16 slots (@x4 mode, 2.5GT/s)
2 x PCI Express 2.0 x1 (2.5GT/s)
3 x PCI
Only thing I don't get is that ^^^ on your motherboard. Does it only do pci express x1 when you crossfire???


What do you mean my that? I am quite the noob when it comes to details of mainboards :whistle: 
If it only gives me half the performance boost that i heard bf3 gets from crossfire i am totally cool!

Why do you think the PSU upgrade is neccessary? some guy up in the comments has a 620W PSU and runs two 560ti on it, why wouln't 700W be enough for 5850 crossfire? =/
January 30, 2012 8:41:50 PM

Just to be sure, will my PC burn out with 2x 5850 without CPU overclocking and just CCC minor overclocking of the GPU on a 700w "be quiet!" ?

Please answer, I got a good offer for my second GC right now!
!