Shouldn't Crysis FPS Increase With Crossfire Enabled

[muskyx1]

If graphic settings in Crysis are identical, shouldn't FPS and pic quality increase if crossfire is enabled? I've tried updating drivers and rebooting each time I change crossfire setting but both modes have the same fps.

two HD4830's on P6T

 

[Quiksilver]

FPS should increase (as there is a crossfire profile for crysis), picture quality, no.
Did you ever get your crossfire bridge, sames you never updated your other thread

 

[slick2500]

Probably not with 2 HD4830's, thats like trying to race in nascar with a ford pinto.

 

[vj8usa]

Originally posted by: slick2500
Probably not with 2 HD4830's, thats like trying to race in nascar with a ford pinto.

What're you talking about? Maybe you don't understand how Crossfire works - you use 2+ GPUs together to provide higher framerates than you'd get with only one of those GPUs. If anything, you should see more of an increase with slower cards, as you'd have more of a GPU bottleneck than with higher end GPUs (where your CPU may keep you from seeing good scaling).

 

[aka1nas]

Originally posted by: vj8usa

Originally posted by: slick2500
Probably not with 2 HD4830's, thats like trying to race in nascar with a ford pinto.

What're you talking about? Maybe you don't understand how Crossfire works - you use 2+ GPUs together to provide higher framerates than you'd get with only one of those GPUs. If anything, you should see more of an increase with slower cards, as you'd have more of a GPU bottleneck than with higher end GPUs (where your CPU may keep you from seeing good scaling).

Doesn't work that way. If you use two lower-end cards in a multi-GPU config, you still are effectively limited to the VRAM/Memory bandwidth of one card as the framebuffer has to be kept synchronized between cards. When you do this with lower-end cards that have shitty memory bandwidth, you tend to get rather poor scaling (especially if you try to increase resolution and other details settings).

 

[Phew]

Some serious techno-snobbery going on in this thread. Two 4830s in X-fire should smoke just about any single-GPU solution (4870, GTX 280/285) in Crysis, and for less money too. You should see significant FPS gains, if you don't, something is wrong.

LINK to benchmarks.

 

[SlowSpyder]

Originally posted by: slick2500
Probably not with 2 HD4830's, thats like trying to race in nascar with a ford pinto.

Errrrr...

Two 4830's are probably faster then any single GPU more often then not.

OP, something sounds like it's not working, you should get better FPS at the same settings. What is your monitor size, what CPU?

 

[krnmastersgt]

Originally posted by: Phew
Some serious techno-snobbery going on in this thread. Two 4830s in X-fire should smoke just about any single-GPU solution (4870, GTX 280/285) in Crysis, and for less money too. You should see significant FPS gains, if you don't, something is wrong.

LINK to benchmarks.

Originally posted by: SlowSpyder

Originally posted by: slick2500
Probably not with 2 HD4830's, thats like trying to race in nascar with a ford pinto.

Errrrr...

Two 4830's are probably faster then any single GPU more often then not.

OP, something sounds like it's not working, you should get better FPS at the same settings. What is your monitor size, what CPU?

Like aka1nas said, that only applies when the 4830s arent limited by the memory bandwidth. In a situation where the memory bandwidth isn't an issue, but instead raw computing power, then yes 2 4830s should be able to outperform any single gpu solution on the market. But as it stands, it's usually the memory bandwidth that stifles these cards in the first place, having 2 doesn't help nearly as much as 1 powerful card.

Now on to the real issue, you only get better performance than a single more powerful card when and only when the Crossfire scaling is any good. The reason people opt for 1 powerful card is because of that very issue, scaling with CF or SLI won't affect them. Another issue being microstutter but some people don't notice it while for others its a gamebreaker, a matter of opinion I suppose.

 

[Phew]

If Crysis at 1920x1200 with 4xAA doesn't saturate the memory bandwidth, nothing will.

 

[SlowSpyder]

Originally posted by: Phew
If Crysis at 1920x1200 with 4xAA doesn't saturate the memory bandwidth, nothing will.

Yup, in the link I posted above they're running Crysis Warhead on the 'Frost' level (I think that's the one everyone says really tortures video crds) at 1920x1200 4xAA/16xAF - DX10 "Very High" and get substantial gains going from one to two 4830's. No doubt it's 512MB is filled as well as it's using every last megabit of bandwidth... but it still gains in performance on the order of 50%.

 

[NoStateofMind]

Originally posted by: Phew
Some serious techno-snobbery going on in this thread. Two 4830s in X-fire should smoke just about any single-GPU solution (4870, GTX 280/285) in Crysis, and for less money too. You should see significant FPS gains, if you don't, something is wrong.

LINK to benchmarks.

Where do you see a GTX280? Am I blind?

 

[Phew]

GTX280 typically performs 10-15% ahead of HD4870 (at best, they are dead even in some games), which would still put it behind the HD4830 X-fire in most games.

Personally, I'm not a huge fan of X-fire/SLI (for heat/power reasons, plus the fact that it adds stuttering and doesn't really help MINIMUM frame rates), but you can't deny that the HD4830 X-fire is a very powerful yet affordable setup.

 

[Quizard]

Is the second card getting any power? Is it hooked up all right? Does it say you have crossfire enabled in CCC? Maybe the crossfire connector might be bad??? Just check those things first because you should always get better FPS in crossfire( have seen cases where in some games you would only get like 2 FPS better)