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how can i do quad crossfire with a Sabertooth x79

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March 27, 2014 1:25:21 PM

i thought it said you could quad crossifre but it only has 3 pcie x16? am i missing something

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March 27, 2014 1:30:44 PM

You'd need 2 dual gpu cards like the 7990.
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March 27, 2014 1:34:27 PM

where did it said that?

riser or adapter card
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March 27, 2014 1:34:28 PM

bignastyid said:
You'd need 2 dual gpu cards like the 7990.


so there is no way to run 4? i wanted to use 4 r9 290s :/ 
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March 27, 2014 1:36:26 PM

roty135 said:
bignastyid said:
You'd need 2 dual gpu cards like the 7990.


so there is no way to run 4? i wanted to use 4 r9 290s :/ 


No, the motherboard only has 3 pci-e 16x slots.
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March 27, 2014 1:43:28 PM

bignastyid said:
roty135 said:
bignastyid said:
You'd need 2 dual gpu cards like the 7990.


so there is no way to run 4? i wanted to use 4 r9 290s :/ 


No, the motherboard only has 3 pci-e 16x slots.


so best i could do is 3 r9 290s in crossfire? bummer
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March 27, 2014 1:58:52 PM

Even if the board were not a limiting factor...

If you want to do 4 R9 290's, you are going to need a custom water loop and a 1000w PSU or better. You're talking about MAJOR heat and power specs coming off those cards. You'll easily need 800w just for the GPUs, if not more. You'll also need an overclocked 6 core Intel to even get close to being able to drive all 4 of those GPUs to their full potential, and even then 3 290's is probably the most that CPU could support without bottlenecking.

3 is actually a much better option. It will be better balanced between CPU and GPU powwer. You could get away with an overclocked 4770k, but the CPU will still be the weak link in that chain. Maybe take the money you didn't use for the 4th 290 and put it into the better CPU and cooling?
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March 27, 2014 2:04:03 PM

rgd1101 said:
where did it said that?

riser or adapter card


maddogfargo said:
Even if the board were not a limiting factor...

If you want to do 4 R9 290's, you are going to need a custom water loop and a 1000w PSU or better. You're talking about MAJOR heat and power specs coming off those cards. You'll easily need 800w just for the GPUs, if not more. You'll also need an overclocked 6 core Intel to even get close to being able to drive all 4 of those GPUs to their full potential, and even then 3 290's is probably the most that CPU could support without bottlenecking.


ive got water cooler and an intel i7 3820 overclocked 1500w psu my cards are actually the 290x's
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March 27, 2014 2:04:37 PM

You might not even have 3 full x16 Pcie's. Look at the specs and it shows 2 16x and the 3rd 16x at 8X. I have seen this on other motherboards, depending on how much bandwidth the first or second 16x cards are using the remaining pcie buses will sometimes be only 8x. 8x won't necessarily hurt you to much but there will be a slight performance loss. Your best bet to have two full 16x is two dual GPU cards on two slots.
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March 27, 2014 2:08:21 PM

warezme said:
You might not even have 3 full x16 Pcie's. Look at the specs and it shows 2 16x and the 3rd 16x at 8X. I have seen this on other motherboards, depending on how much bandwidth the first or second 16x cards are using the remaining pcie buses will sometimes be only 8x. 8x won't necessarily hurt you to much but there will be a slight performance loss. Your best bet to have two full 16x is two dual GPU cards on two slots.


already bought everything :/  looks like 3 will have to do since riser to a 1x is usless...not to worried about the 8x as most people seem to believe 8x is plenty to run a card on
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