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Poor performance with SLI on MW3

Last response: in Graphics & Displays
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December 5, 2011 9:22:10 PM

Try to keep the keep the criticism to a min please. I did not have the money to upgrade to a newer processor so I was attempting to save money using existing CPU and parts.

I bought a evga nforce 750i sli board and another gtx 260 for sli and 2 x 2 ddr2 Dual channel corsair xms2 performance ram. Unfortunately when I was finishing a degree my last computer quit working, and I did not have the time to build a system with 2 weeks of classes left so I bought a HP with the stupid pre-installed OS headache. In changing everything I lose my Vista resorting to win XP 32 bit. I know lots of people who don't work with on computers everyday love XP. Applications on XP were always crashing on me so I hated it. I ran Vista for 4 1/2 years without a reformat until recently when I wiped everything trying to remove a pretty nasty malware.

After finally getting everything patched I install MW2. Running at optimal settings I cap out at 85 but get some severe Frame drops at times.

System:
750i sli
850 w sli read corsair psu
Intel duo core 2 quad Q6600
4 gb dual channel (2 sticks) ram
2 x SATA hdd running in non raid. Board on XP requires floppy for raid setup
2 x GeForce gtx 260s (one is super clocked factory)

I'm running at 1900 x 1200. Yes I've searched the forums, and yes I can turn down the graphics to lower settings. I would have thought I'd get better performance with 2 cards with higher settings. I am running on a CRT though. Cuda is disabled and physX off.

I bought win7 64 bit today, but came here first before I break the seal. Should I upgrade to Win7? Swap to a LCD? Or do I have another option besides overclocking CPU or GPUs? I'm running it in an Antec 300 case with lots of fans so I should be able to overclock some. But would prefer not to.

a b U Graphics card
December 5, 2011 9:43:26 PM

I suggest you to OC your CPU. That CPU in stock clock is kinda low 2.4ghz. I think its the limiting factor.
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December 5, 2011 10:11:45 PM

I'll try that. Would win7 64 bit, be better than 32 bit XP?
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a b U Graphics card
December 5, 2011 10:21:06 PM

No. It would allow you to use more RAM, which would be nice, but I agree with acerace that the CPU is probably the bottleneck. 64 bit doesn't directly increase performance.
If you don't OC the slower GPU, they'll both run at the lower speed.
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December 5, 2011 10:26:26 PM

$285 and up for a 3ghz quad. Not buying one just looking. Are these people nuts? LOL
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December 5, 2011 10:28:20 PM

Thanks for the help. I'll post my results in a bit.
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a b U Graphics card
December 5, 2011 10:32:05 PM

Oh yeah, they just jack up prices on some out-of-production chips.
An X4 955 would be nice, a 2400 would be better and a 2500K would have you set for years.
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December 5, 2011 10:49:21 PM

Not sure of the CPU code, but the I7 I was dreaming for which I don't see in new egg as I speak was a step below the black box gamer extreme the latter being $1k at the time. Would be nice but money is too tight right now. The gulftowns I see are 500+ add cost of ddr3 ram and motherboard not happening.
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a c 253 U Graphics card
December 5, 2011 11:13:22 PM

You do have to be careful when buying a cpu and match the socket on the motherboard. You usually end up changing everything and for $390 you can get all three and have really top notch performance even with the two GTX 260's that you have.
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a c 253 U Graphics card
December 5, 2011 11:25:20 PM

Intel Core i5-2500K Sandy Bridge 3.3GHz (3.7GHz Turbo Boost) LGA 1155 95W Quad-Core Desktop Processor Intel HD Graphics 3000 BX80623I52500K
$219.99
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

ASRock Z68 Extreme3 Gen3 LGA 1155 Intel Z68 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard
$124.99 and a $10 rebate for $114.99
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

CORSAIR Vengeance 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model CMZ8GX3M2A1600C9B
$49.99
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

If you were to update your Pc with these components and then load the Windows 7 64bit on it your performance would then be limited to the video cards.
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a c 109 U Graphics card
December 5, 2011 11:43:58 PM

Make sure you have a good cooler before overclocking :) 
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December 6, 2011 8:35:39 PM

Best answer selected by Quarkstar.
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