wow, you didn't know that u could oc cards.
well to answer your question as to whether the card is any good, no, no its not.
Overclocking will result in little to no performance gain because the card itself is not suitable for modern games.
What do you plan on doibng with this card.
Athlon 64 3800+ @ 2.8 ghz.
Leadtek 6800 350/700 PCI express, different from before.
80 gig Samsung HD SATA x 2
1024 Kingston Hyperx Ram