Start with the memory. Some Cards have Cheep 5ns memory, some have 4ns Memory.
Luckly Good old Creative Labs, Got MSI to make theirs Cards and they Have put 4ns on.
If you have no idea what i mean, maybe this will help.
5ns 400Mhz
4ns 500Mhz
Also having replace all the heatsinks on the card for bigger ones, And having two 120mm fans over all your addin cards, helps
