The actual frequency is 850mhz, so the formula is: gddr5: 850 mhz * 128 bit / 8 bit * 4 (gddr5) = 54,400 I have this card. I got it because It uses only ~55watts @ load (i measure it. yes you can measure it even if it does not have a pcie power connector) and performs Good. Guy's not everyone want's a power sucking monster. have it paired with a e3200 oc'ed to 3.5ghz, plays everything MAXED out @ 1280x1024 and the whole system draws <150watts @ load. Suck it Power Company!!!!