Radeon HD 7870 Crossfire Cpu Bottleneck

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Daniel Valeanu

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Oct 16, 2013
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Hi, i plan on getting another Sapphire Radeon HD 7870 Ghz Ed to crossfire it with the one i have... but , will my Phenom II X4 970 BE be a bottleneck for them? (i didnt OC the cpu because i never saw any difference in gaming but i could if needed, got a kuhler h2o 920 cooling it)
And also... my PSU is a 600WRX ATX 12V v2.3 it is a cheap one but it did its job until now... should i upgrade it too?
 
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jordonc

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Apr 30, 2012
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Well I can't say about the CPU, but you'll either have to buy 2 molex to 6pin adapters or get a 750W psu to accommodate both those 7870s. Right now I think you have just 2 6+2 power connectors, and you need 4x 6 pin connectors to get both 7870s running.
 
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ilysaml

ilysaml

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Oct 30, 2010
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Hello,
What resolution are you gaming at? The Phenoms are already old CPUs for the new CPU intensive titles, and you won't be able to get the full potential of the cards in some scenarios, so you'd better upgrade it. OCing the CPU won't help at all, as the phenoms max at 4/4.2GHz unless some serious cooling is made. Your PSU isn't a quality branded one, seems to have only 2x8 PCIE pins, any quality 600W PSU from Antec, Corsair, Silverstone, Seasonic will be sufficient.
 
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Daniel Valeanu

Honorable
Oct 16, 2013
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10,510
Thanks for the replies :)
I play at 1080p resolution and i want to crossfire it because its cheaper and i saw in some benchmarks that they perform pretty good and i would rather pay 200$ for another 7870 than pay more for a high-end card that gives around the same fps, as for the cpu i will get an i7-4770K and for the motherboard id probably go with Asus MAXIMUS VI HERO Z87 and a new psu. But i was planning to get those later on because i cant afford them all at once. Also i dont plan on playing on more than one monitor.
 
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