Hey, incase anyone wanted to know as I couldnt find other threads about this model card:
I just purchased a Nvidia GeForce 9800GTX+ 512MB and attempted to get it working in Leopard
This card is a G92b chipset which is different to G92 of the normal 9800GTX's so I wasn't sure if it would work
But, using the EFI strings method which normal 9800GTX's work on, it works fine!
System:
Intel Core2duo E6850 @ 3.0Ghz
4GB DDR3 1333MHz
ASUS P5E3 with Intel X38 chipset and ICH9R southbridge
Nvidia GeForce 9800GTX+ 512MB
2x 250GB 7200RPM Sata2 HDD in RAID0
Running on Leopard 10.5.4 Vanilla install with Chameleon EFI