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Dedicated Physx card

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July 8, 2009 5:27:06 AM

The main card in my pc right now is a gtx 260 core 216. I was looking to use the 8800gt that i have sitting around for a dedicated Physx card. When i install the card and start my computer the monitor stays off. I can hear a good post beep and then windows login screen load. What am i missing??? I have not to long just learned about this and cant find any strait answers for my questions. All i have to do is snap the 8800gt into the board and plug in the 6pin connector and start the computer???

More about : dedicated physx card

July 8, 2009 8:56:57 AM

any ideas?
a b U Graphics card
July 8, 2009 1:49:56 PM

I don't think you can just assign the 8800 to be a physx card. It has physx capability with CUDA, but that's only a side note when it's being used as a videocard. Besides, your gtx260 already has all that with its own CUDA...so you're wasting your time. When you're snapping the card in, your motherboard doesn't know what to do with 2 different videocards and no sli bridge/connection.

and on a side note, even if you had a dedicated physx card...not much takes advantage of that game wise.
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July 8, 2009 2:04:46 PM

You can set it as a dedicated physX, and from what I've seen, it does help.

I have a GTX295, and I used to use my 8800GT as dedicated physX until I got my TH2G

You're just having a problem with which graphics card is set as the primary, boot it up, try plugging your monitor into each DVI port until it displays, then change the primary display in the graphics settings.
July 8, 2009 5:37:36 PM

Yes i know it works. I have seen the effect.


I tried hooking the monitor up to different dvi port. Even tried plugging it into the 8800gt and i get the same black screen. I dont know if it matters or not but this is a non-SLI motherboard. Its the GA-EX58-UD3R revision 1.0
a c 106 U Graphics card
July 8, 2009 5:47:46 PM

First, try the 8800GT by itself to make sure it still works. I hope you used some compressed air on it to blow out the dust before you put it in. What kind of PSU do you have? Perhaps you need more power.
a b U Graphics card
July 8, 2009 5:51:08 PM

How large is your power supply? While I would find it unlikely the cards would post without enough power, it is always a possibility.

During POST all capable video outputs should display the logon post screen, until windows, unless there is a specific settign in the bios for dictating which PCIe to use as primary.
July 8, 2009 5:52:41 PM

Zalman 750 watt psu. I'll look through the bios to check that out.
July 8, 2009 6:01:43 PM

There is no setting in the bios that pertains to this issue.
a b U Graphics card
July 8, 2009 6:06:48 PM

Hmm, that PSU is easily enough for this...

You can try clearing the Cmos, If you overclcok you probably have all your settings memorized anyway.. and if you don't it doesnt matter :D .

Put the cards in, flip the cmos jumper (follow MB instructions if you don't know how), and see if it helps.. you would be surprised what clearing the CMOS can fix.

It is quite common for windows to get confused as to which card to use as primary (though I beleive safe mode always defaults to clone, which helps a lot), but not gettign a signal on the post is strange.
July 8, 2009 7:08:44 PM

well clearing the cmos worked to some extent. I installed the card and set it to dedicated physx and reinstalled drivers. But for some reason when i restart, the monitor dosnt turn on until it gets to the login screen. So that means i cant get in my bios to fix all the settings.
a b U Graphics card
July 8, 2009 7:17:48 PM

rkaska said:
well clearing the cmos worked to some extent. I installed the card and set it to dedicated physx and reinstalled drivers. But for some reason when i restart, the monitor dosnt turn on until it gets to the login screen. So that means i cant get in my bios to fix all the settings.


It sounds like the 8800GT is being read as the primary GPU; with NVIDIA cards, only one GPU output is designated as "primary", and only that output will display video prior to the drivers being loaded (windows startup).

Which GPU do you have in your primary PCI-Ex16 slot?
July 8, 2009 7:26:43 PM

2 pci-e x16 slots. gtx 260 core 216 is on bottom and 8800gt is on top.
a b U Graphics card
July 8, 2009 7:50:05 PM

Try removing the 8800GT, put the 260 on the first (TOP) pcie slot, go into bios change whatever setting as far as what you had before but make sure the 260 is set to primary and turn pc off. Put in the 8800 in 2nd pci and boot....

This worked for me on 2 different boards Asus/Asrock....Hope this helps you....

Of course all of this should be done after you clear the CMOS......
a b U Graphics card
July 8, 2009 8:23:23 PM

Top slot is usually primary. Clear CMOS again and switch em up. Glad you are making progress. Hopefully you don't run into issues with having the cards reveresed.
July 9, 2009 5:30:58 AM

GOOD TO GO!! That hit the spot. Thanks for the help.
a b U Graphics card
July 9, 2009 5:46:16 AM

I'm glad it worked for you. Now overclock your 260 and enjoy..........
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