dividebyzero
Posts: 4,840 +1,279
The figure quoted is the "effective" memory rate- for GDDR5 data transfer occurs four times every memory cycle (actual memory speed) and so "effective memory speed" is four times that of actual. In this case 4008 / 4 = 1002MHz actual.Is it just me or the memory clock seems ridiculously high? I own a HD5770 and it's default clock was 11**MHz.
Your HD 5770 should have a memory clock of 1200MHz (not 11**), making the effective memory 4800MHz.