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First Time using SLI

post #1 of 34
Thread Starter 
I just got my second GTX 460 v2 in the mail and got both cards installed, aswell is updating drivers..

Is there any kind of setting i should enable in the physics setting? its giving me dedicated card 1, card 2 or cpu, and auto.. any ideas?
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post #2 of 34
I usually just put it on card #2 and Auto usually selects Card #2.
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post #3 of 34
My suggested steps:-
1) Assign the Physx function to Card 1.
2) Run some gaming benchmarks (eg Mafia 2, Metro 2033, Batman). Note temperature for both cards.
3) Rerun those gaming benchmarks with the Physx function re-assigned to Card 2. Note temperature for both cards.
4) Then, assign Physx function to whichever the card which is cooler.

Usually (but not always), the top card of a SLI setup gets hotter because the gap between its intake fan and the next card is fairly restricted. So, it is generally the lower card that is cooler.

Now, here is a tricky part:-
when using a temperature monitor utility (eg Afterburner) to check temperature for both cards (GPU1 and GPU2), make sure you know which refers to the top card and which refers to the bottom card. It is not always true that GPU1 refers to the top card. Sometimes (and often), GPU1 refers to the bottom card.
Simply put, do not mix up the temp reading between the cards.

For an example, Nvidia Control panel shows that my top card is GPU2 while my bottom card is GPU1.
467
post #4 of 34
Thread Starter 
Well im running into a bigger problem at the moment.. While in bf3 im get weird artifacting. and then the game just freeze or crashes.
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post #5 of 34
Test the new card by itself. Run everything at stock if you aren't already.

Nice post windfire thumb.gif rep+
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post #6 of 34
Thread Starter 
Quote:
Originally Posted by robbo2 View Post

Test the new card by itself. Run everything at stock if you aren't already.
Nice post windfire thumb.gif rep+

Stop drop the Overclock on my CPU, also both cards have a factory overclock do i need to downclock the cards>
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Blue Steel
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post #7 of 34
I use the onboard from my mobo for physx, but you may not have that option.
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post #8 of 34
Quote:
Originally Posted by Jaxis View Post

Stop drop the Overclock on my CPU, also both cards have a factory overclock do i need to downclock the cards>

As robbo2 suggested above, test the new GTX460 by itself since it is new. Make sure it works.

How long into BF3 did the artifacting come? Check the temp of both cards.

And, if you are still using the Corsair CX430 PSU in your sig rig, this might be very likely the culprit. Stop using it for GTX460 SLI. It neither has enough native PCIE connectors nor the wattage/amperage to drive two GTX460s.
Use a good quality 650W (eg Corsair AX650 or HX650).

Also, when troubleshooting, I would avoid using very recent games like BF3 to avoid possible possibility of game software issue or driver conflicts. Use older games or some benchmarks.
Edited by windfire - 5/5/12 at 12:28am
post #9 of 34
Quote:
Originally Posted by JTHMfreak View Post

I use the onboard from my mobo for physx, but you may not have that option.

Your motherboard features GeForce 8300. In order to utilize PhysX you need at bare minimum an 8600, and even then it won't PROPERLY function. 8800GT / 9800GT is bare minimum for playable framerates.

So honestly, I believe for you its either your GTX480 or your CPU doing it.
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post #10 of 34
I have 2 570's in SLI and just installed the drivers (left everything at default). I turned off vertical sync.

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