Dual Graphics Cards.

What he said. Everything I have read says the two cards need to be the same.

Interesting, how did you configure them (bios, drivers?)

GPU-Z: techPowerUp GPU-Z Validation bpepf

CPU-Z: CPU-Z Validator 2.1

Sorry, not yet. I had to go out of town on the weekend. Tonight ill test it by itself.

I just plugged them in and installed the nvidia drivers, all plug and play.

I tested the 7600 by itself. Doesnt work. I get a long beep in either slot. But when i put the card into my old system, it works fine.

Just to be sure i also tested the 8800 in both slots, works fine.

Rambat,

Lookup the MB manual for BIOS Beep error codes you should find the cause there.

dmex

1 short: System boots successfully
2 short: CMOS setting error
1 long, 1 short: Memory or motherboard error
1 long, 2 short: Monitor or graphics card error
1 long, 3 short: Keyboard error
1 long, 9 short: BIOS ROM error
Continuous long beeps: Graphics card not inserted properly
Continuous short beeps: Power error

Pins or the card might be fried?

Ok the best way to explain is that Nvidia wants you to update your video cards. I know this sounds bad but it is. Your 8XXX series video card is actually PciE 1.1 in which the PciE 2.0 slots are backwards compatible with. The 7XXX series video cards are PciE 1.0 and on alot of PciE 2.0 motherboards they don't work. It is also the same for videocardsThis is a very good explanation taken from UncleMacro on the video cards
"No. PCI-Express 1.0 is an older version of PCI-Express. There's 1.0, 1.1, and 2.0. All slots on a PCI-Express 1.0 motherboard including x1 slots and x16 slots are version 1.0. And all slots on a PCI-Express 2.0 motherboard are 2.0 The "x" number of the slot has nothing to do with the version of PCI-Express.

But there are exceptions. It gets more complicated because some motherboards with more than one x16 slot actually have different PCI-Express versions for each x16 slot. One x16 slot can be 1.0 while the other x16 slot is 1.1. Some PCI-Express hardware uses bridge chips which result in some slots using a different PCI-Express version than the main chipset on the motherboard."

the whole post can be found herePCI-E vs PCI-E 2.0 - Tech Support Forum

Nvidia knows about this problem and unfortunately their only response is to buy new compatible video cards. Also Fyi the only PciE 2 Nvidia cards are some of the 9XXX series you need to check before you purchase.

The 8800GT and the NEW 8800GTS (based on the G92) are PCIe 2.0 as well.