My system is running an EVGA 560 GTX with an EVGA 8800 GT as a dedicated PhysX card.  I just tried upgrading to the most recent GeForce 344.75 drivers and I immediately got a BSOD during the install and upon every restart of Windows 7 x64.  I tried rolling back the drivers and the latest one I could get to work was 340.52.  I am assuming this is because the 8800 GT is considered EOL as per the following statement by Nvidia:
 
http://nvidia.custhelp.co...swers/detail/a_id/3473
 
So I guess the question I have is that am I to assume there will be no longer a way for me to update my drivers for my 560 GTX on account of the 8800 GT?  If this is true, I'm not sure what the best thing to do is.  Should I just remove the 8800 GT or just stay with 340.52 driver?  I do play games which use PhysX and I do notice having an 8800 GT makes a difference in performance.

The 8800gt isn't going to help your PhysX in reality, you can test it in games that utilize it. You can stick with the drive until later, or remove it and upgrade. In the end, it is personal preference honestly.

I'm not sure that DX10 card is going to mix well with a those DX11 cards.

In case anyone was interested, I recently performed a whole battery of benchmarks with and without the 8800 GT as a dedicated PhysX card.  I used Metro 2033, Batman Arkham City, and the MARS PhysX benchmark.  Overall, there was no significant improvement using the 8800 GT as a dedicated PhysX card.
 
I had reported before that I saw a significant improvement in testing with Batman Arkham City, but now I recall that was Arkham Asylum not Arkham City and it was with a different machine (I had the 560 and 8800 GT with an Intel C2D E6750 processor), so my apologies for the misinformation.  The testing I just performed was also a lot more thorough and repeated several times.
 
For those interested in some numbers, here are some of my results (all resolutions are 1920x1080):
 
Batman Arkham City (all settings max including PhysX, Min-Max-Avg FPS):
 
GTX 560 + 8800 GT: 19-83-49
GTX 560: 29-78-52
 
MARS Physx Benchmark (MSAAx2, everything else max, Min-Avg FPS):
 
GTX 560 + 8800 GT: 12.64-20.44
GTX 560: 13.38-22.47
 
Metro 2033 (MSAAx4, AFx4, DirectX 11, Advanced Physx and Tesselation ON, DOB OFF, Avg-Max-Min FPS):
 
GTX 560 + 8800 GT: 26.67-67.12-5.20
GTX 560: 26.00-58.14-5.47
 
Hopefully that helps anyone else out with a similar situation.
 
 

lol... I saw that years ago, it actually convinced me to put in a Physx card.  The problem with that video is the main card is a 580 which probably most people would enable PhysX fine without an additional card.  Sounded like the 8800 GT would be powerful enough for a 560.  It certainly wasn't bottlenecking it like the 8800 GTS was the 580.