We said we wouldn't reveal the final core clocks, sources told us not to, and we haven't, but since the core clock of Radeon HD 4850 core clock leaked elsewhere we though we might share the rest too. Radeon HD 4850 will sport a core clock of 625MHz and GDDR3 memory operating at 2GHz. Radeon HD 4870 has a core clock of 725MHz and GDDR5 memory running at 3.92GHz. Both cards have 256-bit bus memory, but thanks to the high frequency of GDDR5, the bandwidth is identical to that of 2GHz GDDR3 over a 512-bit bus.
Last we heard, RV770 has 480 shader processors, not 800, but there are also some stories going around that there might be some substance to the rumors of RV770 having 800 shader processors. Only 480 of them would be for the graphics though, while the remaining 320 is for physics. We can't confirm this so take it with a pinch of salt.
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