r9 290 crossfire or r9 280x crossfire 850w psu for 1440p

Yoloking1324

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Mar 13, 2015
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Hello I am building a black and white theme pc and i was wondering on what type of gpu i should get. so far my build is a
i5 4690k
unsure of the cpu cooler maybe a h100i or a enermax white cpu cooler
8gb of kingston white ram
1tb wb hhd
white nzxt hale 90v2 850w 80+plus gold
asus z97 sabertooth which i plan to paint the armor white
and my case is a black version corsair 760t which i plan i changing the front fans with white led ones
and a ultrawide lg 34 curved monitor
so I am wondering if i can do an r9 280x crossfire with a 850w or can i do an r9 290 and then later add another r9 290 in crossfire and if my psu will be able to handle it , also i will do a light over clock of the cpu maybe 4.0 even. So will my system be able two handle two r9 290 in crossfire or should i just stick with two r9 280x in crossfire ? and also i might do a diy mod with the gpu shrouds and paint then white and black and thank you
 
Solution
I would have no problem running a pair of 300W R9-290 cards on that PSU along with an OC'ed i5-4690K. It has the same specs for the +12V rail as my XFX 850W Black Edition PSU: 70A/840W

However, if I was buying new for dual 290s, I would probably go for a 1KW PSU.

clutchc

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I would have no problem running a pair of 300W R9-290 cards on that PSU along with an OC'ed i5-4690K. It has the same specs for the +12V rail as my XFX 850W Black Edition PSU: 70A/840W

However, if I was buying new for dual 290s, I would probably go for a 1KW PSU.
 
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Yoloking1324

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Mar 13, 2015
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really so what would be better for the 850w. since i have it and dont plant on upgrading for maybe 3 years, and i plan on doing 1440p , so what would be better r9 280x crossfire, one r9 290, or a r9 290x, ? and i would go nvidia but the gtx 780 is still pretty expensive and idk if two gtx 770 in sli would be able to do 1440p for maybe 2 to 3 years unless i get a gsyntic monitor
 

clutchc

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1440p will require roughly half again as many pixels to render per frame as 1080p. Not as bad as a move to 4K rez. So with that in mind, dual 280x would probably produce the greatest performance on a screen of that rez. But a single 290X will do the job too and allow adding a 2nd one in the future.
Your MB's PCIe x16 slots drop to x8 lanes each if 2 cards are installed in CF or SLI. But I don't know of any card yet that can saturate the bandwidth of PCIe 2.0/3.0 at 8 lanes.