im Amazed by the hashing speed of my 7870. I mean, 440 Mhash without any voltage tweaking is great i think.
Pretty good, but the 7970 is still a little better.
440 Mh/s for ~$370 vs 700 Mh/s for ~$560 means that the 7870 is running at about $0.84/MH whereas the 7970 is at roughly $0.80/MH.
Not a huge difference, but significant.
Of course this doesn't take power into account. I'm not sure of the wattage differences between the 7870 and 7970.
maybe someone can enlighten us?
230 at stock vs 175 at stock. 79xx has the automatic memory voltage control, but has a limit of 150mhz lower than core. However, at, say, 1125mhz like mine is, moving memory from the stock 1375 down to 975 cuts down on GPU temps about 5c. On my 5850, which didn't have automatic memory voltage control, I had to drop the 1000mhz memory down to below 300 to get the same 5c drop.