Is it an Intel or AMD CPU? You're not likely to find a DDR2 w/X-Fire but I own an Asus M4N72-E which has 2 ea, PCIeX16 slots and uses DDR2 and a PhenomX4-940CPU.
It's just getting a bit hard to find some DDR2 mobo's. Depends on the CPU you have. Might be easier to get a new MB and RAM, but not cheap although I spent $75 for some DDR2-800 1 year ago.
what do you mean by cpu? as i told i got core 2 quad q6600 i want to upgrade my mobo, power supply and card(ati 6790)
As you told us after MY QUESTION!
My advice is do not spend money on a new board for your Q6600 but when you upgrade platforms then get a crossfire board!
You'll be better to wait for the HD78XX, grab 1 of them instead of going crossfire.
This way you won't have to change motherboard and when ready upgrade the entire system with new CPU, memory, motherboard...
thanks to all my current mobo supports only 4gb ram, i use windows xp that is why i am going to change mu mobo. what about asus p5qld pro? i have read suggestions which say instead of using crossfire/sli use one good card b/c xfire/sli dont support some games also
thats true but it will be good if you get sli/cf supported mobo because if u think for crossfire in future so that will be good and one more thing that is i think the mordern games which are going to launch in future they will support cf and in some cases cf will be good and in some cases in is bad.