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Crossfire 7870 xt or 290/290x?

post #1 of 15
Thread Starter 
So right now I'm rocking a 7870xt w/ boost. Not a bad little card, but I've been thinking about what path to go on upgrading. I know I can grab a used refrence r9 290 for about $350, or I can grab another 7870 xt w/ boost and crossfire them. I've never been one to crossfire as I never have, I'm usually a single gpu kinda guy. But with that being said I can grab a second 7870xt used for half the price of a used 290. I've done some looking around on the net and two crossfired 7870 xt's perform close to a 290x? Which route should I go? I have an i7 2600k on an asus p8p67 le board, w/ a 700w cool master psu.
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post #2 of 15
i would say since your a single video card guy get a 290x, i had was debating going to a 290x myself. instead i got waterblocks for my 7870 reference cards which are pitcarin. i never did waterblocks on a video card before so i figured the 7870's were good practice with acceptable risk if the whole thing blew up.
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post #3 of 15
Thread Starter 
Quote:
Originally Posted by Maximization View Post

i would say since your a single video card guy get a 290x, i had was debating going to a 290x myself. instead i got waterblocks for my 7870 reference cards which are pitcarin. i never did waterblocks on a video card before so i figured the 7870's were good practice with acceptable risk if the whole thing blew up.

how many cards are you running? was there a significant notice on crossfire?
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post #4 of 15
i run two 7870 references on a 1920 x 1200 monitor, I noticed improvements definity. The 2GB will limit you when you start going to higher resolutions though. The drivers will be hit or miss depending on application. my best benchmark so far is this one below

http://www.3dmark.com/fs/1940195
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post #5 of 15
Wait For amd pirate islands gpu(a r9 380x will be better than a 290(x) and would be a lot cooler since it will be a 20nm gpu
Edited by PontiacGTX - 4/16/14 at 6:57pm
post #6 of 15
Quote:
Originally Posted by Maximization View Post

i run two 7870 references on a 1920 x 1200 monitor, I noticed improvements definity. The 2GB will limit you when you start going to higher resolutions though. The drivers will be hit or miss depending on application. my best benchmark so far is this one below

http://www.3dmark.com/fs/1940195

something is off with your combined score.

http://www.3dmark.com/3dm/2851708

it could be win8.
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post #7 of 15
Quote:
Originally Posted by rdr09 View Post

something is off with your combined score.

http://www.3dmark.com/3dm/2851708

it could be win8.

your not using the newest drivers

:::actually, win 7 does not have DX11.2 , your card is not being used fully.
Edited by Maximization - 4/16/14 at 6:23pm
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post #8 of 15
Quote:
Originally Posted by Maximization View Post

your not using the newest drivers

no. i use 13.11 in one drive and 14.3 in another. i use 13.11 for benches. 14 drivers cause throttling when adding voltage.
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post #9 of 15
Reference R9 290s are dropping to about $250 on Ebay (I've been watching them), so it's actually a better option than going 7870 CF.

If you do go for a CF system, make sure you know what you're getting yourself into. The Asus board you are using only supports the top card in 16x, while the bottom card is forced to run at 4x. This may cause you to have issues when crossfiring cards. Also, you must ALWAYS play in fullscreen mode to use Crossfire and all monitors must be hooked up to your top card.
    
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post #10 of 15
the throttling is caused by heat not the chip, but i do have water blocks on mine, the reference cooler could never handle it on the 7870,

http://www.techpowerup.com/gpuz/2bpr8/

290x is unleashed under water,
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