I decided to overclock my QUANTUM 6600gt to get some more gaming power, i bet that you wouldn't have heard of it. It is the 128 Mb version.I am not even sure that it uses GDDR3 interface or not. The default specs are:- Core Clock :- 300 Mhz 3D clock :- 400 Mhz Yes, i believe that some people out there say that it is a cross between 6600 vanilla and 6600gt but i can't confirm it. The overclocked frequencies are :- Core Clock :- 407 Mhz 3D clock :- 640 Mhz yes you read it right 640 Mhz. so for the core clock it is 35.67 % and for the 3D clock it is :- An AMAZING 60 % i believe that i can overclock temp but i need better cooling as the temp is around 65C on load. i tried the 3D clock to 653 Mhz but it stck for a couple of seconds while playing motogp3 on full details for about 1 hour. I believe that leaving the temperature the overclock is pretty amazing. i am not considered about it's life as i will probably do hardcore gaming for only a couple of months. So you people out there what do you say.