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How big of a PSU do I need?


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#1
CS420

CS420
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Currently I am running a core i5 and a radeon hd 6850. How much power is it going to take to overclock the CPU and crossfire the GPU with an R9 270x?



#2
Fidite Nemini

Fidite Nemini
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Can you even crossfire a HD 6850 with a R9 270X? Might be I missed some details about Crossfire functionaility, but afaik you can't Crossfire those two.

 

Anyway, rule of thumb for a dual GPU system is 750W (make sure you have enough 6+2 connectors to power the GPUs).



#3
A Crusty Knight Of Colour

A Crusty Knight Of Colour
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The 270x is a 7870 iirc. They won't crossfire.

But two 270x cards and an i5 highly overclocked, a good quality 650w power supply would do nicely.