Hey guys. Glad to be a part of this community. I've a HIS HD4870 1GB. This one: http://www.newegg.com/Product/Product.aspx?Item=N82E16814161269 Right now, I've it clocked at 790MHz (the maximum permissible using the Catalyst Control Center). I've seen lot of the users having the HD 4870 1GB cards with the reference coolers clocked at 850 odd MHz. How do I go about achieving the same with the card that I've? I believe I've to use the Radeon Bios Editor. (v1.19 downloaded already ) I dont've a remote idea about the ideal memory clocks, although 850MHz for the GPU clock should be quite good I guess. PS: I also have a HD 4850 running in the crossfire mode.