CURRENT GPU AND POWER SUPPLY: XFX Radeon HD 6770 on an Antec BP550 Plus 550W psu
OTHER RELEVANT SYSTEM SPECS: This was a budget build
Memory---2 x 4GB Gskill @ 1066
Cpu--------AMD FX 4100 oc @ 4.1 Ghz
Psu--------Stated above, Antec BP 550 Plus 550W psu
PREFERRED WEBSITE(S) FOR PARTS: newegg or similar site
PARTS PREFERENCES: xfx
ADDITIONAL COMMENTS: First off I know that my motherboard supports crossfire, the only thing is, the slots run at 16x and 4x and I know that isn't ideal for a crossfire setup. Secondly I am a little worried that my 550W psu wont hold up to a 6770 crossfire. So basicly I am trying to decide whether to buy a second 6770 for crossfire or to just upgrade to a 6850. What do you guys think?
I guess what I really want to know is whether crossfire 6770's will run on my power supply and if my 16x/4x motherboard would limit the performance so much that it would just be better to buy a 6850/6870. Ideally I would like to buy another 6770 for crossfire as I have read that the performance is fairly good. Sorry if my original post was confusing, and thanks for you help
The 4X slot will not massively hold back the second 6770 and the PSU should be fine making it a very good value upgrade compared to replacing the card. The only real bonus to the 6850/70 is you may get microstutter with the dual cards.
In 4x the performance of the second card will drop greatly, your psu also in corncern......
I'll have to opt for single 68XX....
Edit: I once experience with x16/x4 5770cfx (when I fail to o.c.) , The performance is horrid if u compare with 16x/16x (or 16x/8x/8x mine now) as i recal 5770/6770 need min x8 to work properly..........
Well I'm experience that my self the game was almost unplayable in 16x/4x, I don't know if it becaused of failed O.C. (I need to reseat the card to fix that) or it because the bandwith of second card being cut off...
So now I'm Hardly recommend any dual 5770 setup at 4x..........
There are reasons for both 2 x 5770s is better price & performance but does have some issues a 6850 is not a massive upgrade from a 5770 but will not have any of the crossfire problems. I don't think personally a 6850 is a big enough upgrade from a 5770 to be worth it and suggest if you don't go the crossfire route wait until you can afford a 560Ti, 6950 or better.