Sign in with
Sign up | Sign in
Your question

IS it my PSU or Crossfire doen't work very well?

Last response: in Graphics & Displays
Share
February 21, 2013 12:30:06 AM

Hello,
so i have a radeon HD 7850 2gb and recently i bought another one for $140 1gb with 2 freegames(Bioshock and Tombraider) a week ago and my new PSU is on the way, however my current PSU is 500w, the one i ordered is 600w; so today i plugged my new Card and tried crossfiring, but it seems that any game i play i experience stuttering all over. is it my PSU or or there is something wrong with corssfiring or is it because one of my GPUs is 2gb while the other is 1gb? or my PSU isn't capable of handing both?

specs

CPU: intel i5 2500k 4.2
GPU 1: Sapphire Radeon hd 7850 OC version 2gb
GPU 2: XFX 7850 1gb
Mobo: Asrock Z77 Pro 4
RAM: Kingston Hyperx BLu 8gb
HDD: Western digital caviar black 1tb
SSD 1: Samsung 840 series 240gb for OS
SSD 2: OCZ agility 60GB
PSU: Coolermaster Extreme 500w
a b U Graphics card
February 21, 2013 12:34:47 AM

well, your current psu isnt enough for both. and the 1gig card is limiting your other card to 1gig as well, so you'd prob be better off with just the single 2gig card.
m
0
l
February 21, 2013 12:42:50 AM

daswilhelm said:
well, your current psu isnt enough for both. and the 1gig card is limiting your other card to 1gig as well, so you'd prob be better off with just the single 2gig card.

so what can i do, i can't return the card because i already entered my codes for free games on AMD site?
where can i sell it to someone?
m
0
l
Related resources
a b U Graphics card
February 21, 2013 12:44:20 AM

wait for the new psu and see if that makes a difference? if not sell it on craigslist or ebay etc...
m
0
l
a b U Graphics card
February 21, 2013 12:50:47 AM

+1 500w for mid-high end GPUs is really close so that could be an issue... Also you could try to remove and reinstall the latest AMD drivers to see if that's not the drivers that are buggy...

PS: your 2gb card is limited by the 1gb card under it like daswilhelm wrote...
m
0
l
February 21, 2013 1:01:46 AM

also make sure you download and install teh caps as well...
m
0
l
February 21, 2013 1:05:22 AM

Hard Line said:
also make sure you download and install teh caps as well...

what caps?
m
0
l
a c 173 U Graphics card
February 21, 2013 1:10:26 AM

depending on the game it could be a ram limitation. games like BF3, Crysis2 and Skyrim all use more than 1gb vram at max settings. That WILL cause stuttering, especially when you add crossfire into the picture. the psu you have is not enough, but it may not be the issue causing your stuttering. Crossfire is crap at the best of times, particularly on mid range and low end cards. turn all the details down in your games and see if it still stutters, if it doesnt your probably maxing the vram of the 1gb card. If i were you i would sell both cards and get a better single card. You probably could get away with not upgrading the psu then, and you wouldnt be restricted to medium detail levels by your 1gb card.
m
0
l
February 21, 2013 1:30:38 AM

if the problem persists even after installing the 600w PSU i will try to sell the 1gb card ,but i haven't sold anything online so i might need some input on where to sell.

this is the link to the card http://www.newegg.com/Product/Product.aspx?Item=N82E168...
bought it for 165 and it is 140 after the rebate, but i haven't processed the rebate yet.
m
0
l
February 21, 2013 2:25:14 PM

there are 3 things on that page. the 1st item are the catalyst drivers, the 2nd is a beta driver, the 3rd is the caps ( for multi gpu setups.) you need catalyst AND caps for multi gpu setups (1st and third)
m
0
l
a b U Graphics card
February 21, 2013 2:33:59 PM

You might still be able to return the card even after using the codes. I returned a card before after redeeming the AMD Never Settle code things, they never even asked for them.
m
0
l
!