HIS HD 6970 Series

There is more than 1 series of HIS HD 6970, okay I have found 5 series of HIS HD 6970 graphics card. Basically, there is available with Turbo edition or also IceQ fan edition, so where is the different thing from them? well, it's usually just different on core clock and also memory clock. The fan specs and style/design also can be the one of difference things between HIS HD 6970 series graphics