ATI 4870x2 compatible with my Motherboard?

Hello All,

Kinda a stupid question but i am not sure and don't want to waste $800 (Australian Dollars) on a ATI HD4870x2 which is nearly 1k.. if it won't work with my motherboard.

I'm using the GIGABYTE GA-965P-DS3/S3 i know that the chipset doesn't support SLi or CrossfireX and the motherboard only has one PCI-E 16x Port.
But since it's only one card i was hoping it would work.. but not sure if both gpu cores would work as the board has no support for crossfire?
Not sure how it works..

Thanks in Advance,
Knaxx.

Only using a Core 2 Duo E6600 (2.4Ghz) OC to 3.2Ghz.