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BF3 lag, only when SLI enabled

post #1 of 45
Thread Starter 
Hey guys, I have just had a BSOD, after which (when I had rebooted) my GTS 450's showed no option for SLI, although they had before. So I re-installed the drivers (285.62) and the SLI option reappeared again, and I enabled SLI with all of the Nvidia default settings. After this I launched BF3 to play a few games online, and saw in MSI afterburner that I was getting 8-10 fps in ULTRA at 1920x1080, whereas I have previously been getting ~50fps before the BSOD. I played around with the settings for a while and could achieve ~17fps at 640x480 res, with all of the lowest settings...

After a while I disabled SLI and launched BF3, expecting to have the same problem, just with half the fps. But to my surprise, everything ran normally at ~25fps on ULTRA with 1920x1080 res.

What is going on? The blue screen said something about PDE's, or PED's and some drivers, but I can't remember much other than that and that GPU 2's fan sped up to 100%.
Prior to this SLI worked fine in BF3, has anybody else had this problem, and does anybody know how to sort it out?
Thanks in advance, and well done if you read the whole post...
 
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post #2 of 45
When their fans sped up to 100% do you think that possibly they got damaged and when used in sli for some reason they access the damaged part. This is totally just a theory but makes sense in my head. Good luck.
-Ghooble
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post #3 of 45
Sorry im no help but how well does your 1 gts 450 run bf3 at max settings?
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post #4 of 45
Thread Starter 
All maxed out, without AA or AF and at 1080p, you can get 25-30 FPS. Lower the graphics a bit and you can easily get 60fps. Nvidia lied when they said you'd need GTX580's in dual SLI to max out BF3...
 
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post #5 of 45
Quote:
Originally Posted by Warweo View Post
All maxed out, without AA or AF and at 1080p, you can get 25-30 FPS. Lower the graphics a bit and you can easily get 60fps. Nvidia lied when they said you'd need GTX580's in dual SLI to max out BF3...
Wow thats awesome to read because i heard you NEED a radeon 6970 or gtx 580 to have playable fps before the game came out. I hope you get this problem fixed i was thinking of SLI'ing my gts 450
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post #6 of 45
Quote:
Originally Posted by Warweo View Post
All maxed out, without AA or AF and at 1080p, you can get 25-30 FPS. Lower the graphics a bit and you can easily get 60fps. Nvidia lied when they said you'd need GTX580's in dual SLI to max out BF3...
Dude, you are like my grandma complaining so much, they didn't lie at all
25-30fps if that's not choppy then Justin Bieber married you.
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post #7 of 45
Thread Starter 
Nope, that Nvidia and ATi/AMD just trying to make money, Nvidia especially... A single 450 runs the game just fine, but make sure you get a GDDR5 card, with at least 1GB of VRAM.
 
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post #8 of 45
Quote:
Originally Posted by Warweo View Post
All maxed out, without AA or AF and at 1080p, you can get 25-30 FPS. Lower the graphics a bit and you can easily get 60fps. Nvidia lied when they said you'd need GTX580's in dual SLI to max out BF3...
Hmm, with a single GTS450 I crash every 10 mins if my textures are set to high. Everything else runs fine at medium, but textures has to be low.
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post #9 of 45
can i see proof i5 2500k 5ghz 1.376v ? :]
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post #10 of 45
Thread Starter 
Quote:
Dude, you are like my grandma complaining so much, they didn't lie at all
25-30fps if thats not choppy then Justin Bieber married you
Excuse me? Just in case you didn't notice, you have a GTX 570, and I have a GTS 450. I think I know more about how it runs BF3 than you do... and of course you wouldn't run the game in ULTRA with it, that why I said it was possible to lower the gfx and get ~60fps. as for Justin Bieber having married me, do you have some kind of problem?
 
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