hi im looking to upgrade my graphics card but need some help. i have a ASRock N68C-GS UCC motherboard & was wondering if it is compatible with a DDR5 graphics card. iv looked in the manual that came with the motherboard but cant find any info in there. the motherboard is compatible with DDR2 & DDR3 ram so im guessing that only a DDR2 or DDR3 graphics card would be compatible right? just wanted to confirm before i make a purchase. thanks in advance