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Quick Q for SLI and PhysX w/ a pair of GTS450's

post #1 of 16
Thread Starter 
Alrighty so I have a pair of Asus GTS450's.

I got the first one for Christmas and I installed it in my pc, installed the drivers, etc etc. Then when I got the second one I installed it in my pc along with the SLI ribbon deal, Windows picked it up and in the nVidia control panel it allowed me to turn SLI on/choose which card to use for PhysX.

Now, a couple days ago I moved my PC, from the floor to the top of a desk and something really strange happened. Not sure entirely what, something with the bios..but I had to uninstall and reinstall the nVidia drivers. Now, both cards are showing up, but there is no SLI option, just the PhysX option.

I ran GPU-Z and all that to check if they were in SLI still or what, and they are not.

Should I just uninstall the drivers, take out the 2nd card. Reinstall the drivers, then put the 2nd card back in? Or is there an easier fix...

And for my PhysX question, would I see a good performance boost if I bought a third nVidia card (open to recommendations) that would solely serve as a PhysX card? And if so what card should I buy? I don't really want to spend a whole lot on it, and I'd prefer something that's relatively quiet. If it was a card without a fan that'd be wonderful.

Thanks guys
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post #2 of 16
First thing I would do is check the SLI ribbon.
post #3 of 16
During the move did you accidentally bump the SLI bridge enough that it's not making proper contact? Otherwise I'd just try a quick driver reinstall and see what happens.
As for a third card, that's up to you- I'd almost sell the pair and take the proceeds + third card worth of cash and get a single more powerful card, like a 570 or something... Not sure how SLI 450s perform vs a 570, but I've been converted from SLI to single cards, multi-card means too many variables.. Until my 570 is outdated enough that I need a second one to help
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post #4 of 16
first reseat both cards and the sli cable. then reinstall the drivers. i would recommend the 266.35 drivers though. they are in the beta section and help to give a little better performance.

i would leave PhysX set to auto. and i doubt you will really see an improvement running a third card.
Edited by The Fryer - 1/21/11 at 1:08pm
post #5 of 16
I'll second the 266.35- I couldn't get my 8800 seen next to the 570 on the 266.58 set.

Edit: Above may or may not be relevant, but it's a multi-card issue so I figured I might as well mention it. Doesnt' sound like your problem though, you can see both cards..
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post #6 of 16
Thread Starter 
Yeah I tried multiple resets with taking the ribbon/bridge on and off.

As for a single 570, I don't need that much..ha. My old graphics card before christmas was an ATI X1800XT 512MB. So anything was really a nice improvement. I'm more of a console gamer, I just needed something to replace my 5 year old card. Then I thought about SLI and I wanted to give it a try, being that the GTS450's are pretty damn cheap for around $130 a card.

I just downloaded 266.58 right after the first post, I guess I'll give that a try and if no luck I'll get the 266.35.

For PhysX you don't think it'd be worth it to get a 88** or 98** or something..
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post #7 of 16
Quote:
Originally Posted by derickwm View Post
For PhysX you don't think it'd be worth it to get a 88** or 98** or something..
Anything is better than nothing. An 8/9 series or GTS250 would be good and also spit out some additional PPD if you're, you know, into curing cancer and all that
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post #8 of 16
Thread Starter 
Yeahhh I need to jump on the Folding wagon. Especially since University pays for electricity.

Edit* Finally installed 266.58 and SLI is back in business.

Couple other questions,

When I set PhysX to auto select it chooses to set the dedicated card to card 1, when both my 24" and 42" displays are hooked up through that card displaying at 1920x1080. I don't know a ton about PhysX but from what I do know, wouldn't it make more sense to have the dedicated PhysX card be the one with no displays hooked up to it?

Also for PhysX I was thinking about this: http://www.newegg.com/Product/Produc...82E16814143169
Would that be good enough for PhysX while playing games at 1920x1080. And anybody know where I could get one?
Edited by derickwm - 1/21/11 at 2:30pm
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post #9 of 16
Quote:
Originally Posted by derickwm View Post
Yeahhh I need to jump on the Folding wagon. Especially since University pays for electricity.
Yup, internet + electricity paid for = time to fold! You'll pull some nice PPD from your rig...
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post #10 of 16
Thread Starter 
Quote:
Originally Posted by derickwm View Post
Couple other questions,

When I set PhysX to auto select it chooses to set the dedicated card to card 1, when both my 24" and 42" displays are hooked up through that card displaying at 1920x1080. I don't know a ton about PhysX but from what I do know, wouldn't it make more sense to have the dedicated PhysX card be the one with no displays hooked up to it?

Also for PhysX I was thinking about this: http://www.newegg.com/Product/Produc...82E16814143169
Would that be good enough for PhysX while playing games at 1920x1080.
Anyone?

I found a passive cooled 9800...for $100 on eBay. For that price I'd rather get a third GTS450. However I did find a passively cooled 9400GT http://www.newegg.com/Product/Produc...82E16814134093 for $52 and that might be worth it. Lastly I'm looking at a Zotac GT 220 http://www.newegg.com/Product/Produc...82E16814500159 for around $80.

What do you guys think? For strictly being a PhysX card should I spend $50 on the 9400GT, $80 on the Zotac GT 220, or another $100-$130 on a GTS450.

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