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3x R9 290s....tri-fire...unplayable on bf4 in 7680x1440

post #1 of 146
Thread Starter 
I am trying to play bf4 on my 3x 27" monitor setup in 7680x1440 and no matter what video settings I pick it is unbelievably laggy.

setup

3x R9 290s w/ gentle overclock
i5 4670k w/ gentle overclock
8 gig ram

it's an open air setup with the fans set to go above default so I don' think it is throttling my GPUs.

Is 12 gigs VRAM not enough for 7680x1440 on bf4?

Thanks
post #2 of 146
vram doesnt stack, even tho you have 3x 4GB cards you still only have 4GB vram

Your CPU could be bottlenecking you, when you play does the CPU hit 100% before the cards do?
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post #3 of 146
System profile would help.

What motherboard are you using with that Tri-fire configuration? Are you running the latest greatest beta Catalyst drivers? BF4 has a lot of issues with a lot of systems - it's mostly development issues as far as I'm concerned, not a problem with your hardware.

Three 2560x1440p monitors is moving a LOT of pixels around. BF4 should at least be smooth on medium settings with those boards, but that doesn't rule out driver or system board issues.

Greg
post #4 of 146
Well the vram doesnt exactly stack unfortunately, you are limited to the amount on the lowest card, which should be 4gb.

BF4 still has a ton of issues, its is pretty much a miserable experience with my 2 GTX 670's. I am just curious though, Does the game lag if you play it on just one monitor with tri-fire?
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post #5 of 146
Thread Starter 
Quote:
Originally Posted by Aussiejuggalo View Post

vram doesnt stack, even tho you have 3x 4GB cards you still only have 4GB vram

Your CPU could be bottlenecking you, when you play does the CPU hit 100% before the cards do?

I'm not really sure. I do remember alt-tabbing out and seeing my CPU at 100% while playing. Would that make that much of a difference?
Quote:
Originally Posted by hammong View Post

System profile would help.

What motherboard are you using with that Tri-fire configuration? Are you running the latest greatest beta Catalyst drivers? BF4 has a lot of issues with a lot of systems - it's mostly development issues as far as I'm concerned, not a problem with your hardware.

Three 2560x1440p monitors is moving a LOT of pixels around. BF4 should at least be smooth on medium settings with those boards, but that doesn't rule out driver or system board issues.

Greg

Using Z87-G45 motherboard. Yes, I am running the most current drivers according to the AMD website.

Quote:
Originally Posted by mxfreek09 View Post

Well the vram doesnt exactly stack unfortunately, you are limited to the amount on the lowest card, which should be 4gb.

BF4 still has a ton of issues, its is pretty much a miserable experience with my 2 GTX 670's. I am just curious though, Does the game lag if you play it on just one monitor with tri-fire?

Game is perfectly smooth on a single monitor. Haven't tried just 2 as my reticle would be in between the 2 monitors and drive me crazy.
post #6 of 146
If your CPU is at 100% and your GPUs are only at 50% or something then your CPU might be bottlenecking you, which can happen sometimes but if you have it overclocked it shouldnt really be a problem
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post #7 of 146
Your board only supports 16/4/4 or 8/8/4. And only an i5. To fully utilize the kind of power those cards have you need a better board and cpu. Likely a 2011 socket.

Try just two cards and make sure both are running at 8x . I'll bet it'll perform better.
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post #8 of 146
Thread Starter 
Everything I have read online suggests that an i5 is more than capable for gaming and that there is little difference in performance between a GPU on pci-e 16x 3.0 with 4 lanes vs a GPU on pci-e 16x 3.0 with 8 or 16 lanes. Is this not true? I guess I was expecting more out of this setup, seeing how I have seen reviews with similar setups and they are getting 50 fps on bf4 and other games.
post #9 of 146
Pcie 4x 3.0=pcie 2.0 8x

Which is your vram usage?which is your gpu usage?which are the Vrm temperature?which are graphical setting?which is the cpu usage?
Edited by PontiacGTX - 1/11/14 at 9:32am
post #10 of 146
Overclock your processor more to something like 4.5Ghz. If i had to guess your cards are stacked and downclocking severely
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