frinik and LC,
I have good news: A kamerad has a 4850 that he overclocked and reported
very good results. He said he max out the memory speed over 1000mhz. I
checkout your HD5550 and you should be able to also. LC has a HD5550 (I
think) too so I would like to know if he OC'd his. So basically your fine in the
GPU department just give the OC a try.
Cheers
ZW