I just realised, that my mobo is an AM2+ (ASROCK N68C-S UCC) but my processor is AM3 (X6 1045T). Therefore the HT link that i can run is 1000MHz, though the 1045T can do 2000. Will my performance be decreased?
More aboutlink performance
Yes it will... on paper. I doubt you would notice any difference in gaming though.
^+1 agreed measurable by benchmarking but not noticeable.