Help on understanding Physx

[Caddys83]

While Im waiting on my goodies from Frozen CPU and performance-pcs to tidie up my wires, I decided to play around with some of the Physx Benchies that Nvidia have.












While the GTX 280 did well, I wanted to take the load off the GPU and see if I can increase the framerate. I transfer the Physx workload to the other cores on Phenom 9950 and it perform almost the same as the GTX 280.

Further investigation tells me that I can use my old 88000 GT for the Physx workload and the GTX 280 to process the other informations

So I have the latest driver for the GTX 280 and the latest driver NVIDIA PhysX System Software WHQL.



My issue is when the old 8800GT is installed with the GTX 280 as in the picture above and I turn on the computer, the 8800GT fan runs at 100% from the post to the desktop and it stay at 100%. I turned it off and moved the 8800 GT up to the next PCI-e slot. Same thing. I removed the GTX 280 and ran the 8800GT as if there was never a GTX 280. It ran fine

Something is not correct since this is what my Physx Control panel looks like



As you can see in the picture below, I don't have a drop down menu.



Any Idea's to what Im doing wrong? Thanks for anyhelp.

Here is where I got the Idea from.

PCGH - Mirror's Edge: Physx effects benchmark review - Mirror's Edge, Test, Benchmark, PhysX, graphics card, review

Mirror's Edge - Physx effects reviewed: Processor or Geforce?
There are two possibilities to have the additional effects calculated: Either the processor does it (for Radeon graphics cards or Geforce 7 and older Nvidia cards) or a GPU Physx compatible Geforce graphics card (Geforce 8 or better). IF you choose the GPU accelerated Physx you also can use a second Geforce card and have it calculate nothing but the Physx workload. To do so you select the card intended for Physx in the driver panel. It doesn't matter if you are using Vista or XP since Physx work on both operating systems. And because Mirror's Edge is a D3D9 game the graphics look the same on XP and Vista, too.

[Caddys83]

Sad I have to answer my own topic lol j/k.

After much brain scratching , finally got the 8800GT card to work as a Physx card... In my other post I couldn't get the 8800GT card to show up in the drop down menu, the fan on the 8800GT ran at 100% and other issues I finally got it to show up on the drop down menu. The other issues are gone

Although the 8800GT did ran a little warmer then the GTX 280 I would say its cause its closer to the bottom of the case and I don't have a PCI slot exaust fan installed. These slim low profile 8800GT card blows the heat right back into the case.




Got around to make a VGA dummy plug. I thought about soldering resistors, but silicon glue or the liquid electrical tape would work too. The below image is just a rough setup.




I did several Nvidia Physx demo tool test but I didn't want to post a bunch of pixs so these last 2 images are my best results for one of the bench test (Nurien Tech Demo); 5 test for GTX 280 and 5 for 8800GT enabled Physx

GTX 280


8800GT



My personal conclusion... Not even worth it I forgot to do a 3D mark vantage but im not even going to mess with this route again. Maybe I have a bottleneck somewhere that is not letting me see the numbers... I just wanted to take the Physx load off the GTX 280. I played the UT3 (with Physx pack) CODW@W and Crysis. I think I did see some improvements but not even worth it..... Im so upset that I spent my life trying to figure this out while I could had been doing something more productive like gaming

I also need to give credit to Vaulter98c who guide me in another forum.