Radeon X600 Pro4 Clock

Hello, i am a pretty newbie to this whole overclocking thing but i wanna know how much i can clock my card 505/351 is this possible without new a cooling system i really want to know becouse i dont want to break my card.

The default right now is 400/250.

If you want to help me and explain very detail contact me at this adresses.

msn: [email protected]
yahoo: infecteddynamicdude
aim: ddynamicddude

Okey i have currently clocked to 525/280 i cant clock more ram becouse then i get an artifact, anyway how much more coremhz can my card handle i really need some support here?

I've got a similar problem, mine is 400/300 by default, and I can get the core Mhz to about 525Mhz without artifacts, but the memory can't get above 305Mhz without getting artifacts. Now, I do get a decent performance improvement (about 10% in benchmarks) with this, but it's still kinda odd that the memory won't go up.