Unfortunately.. no.... SLI isn't as flexible as crossfire when using different cards.... you need two identical cards for SLI.
Thx for the reply
But the 9800GT has the exact same chipset and board arrangement as the 8800GT (some oem simply rebranded the 8800GT to 9800GT)
I thought this can be an special case? Do you know if that's the case same as every other nvidia card?