You have a link for that? Because everything I've found suggests its actually lower power consumption than GDDR3 (20-30%), but perhaps those numbers are relative to performance.
I actually don't have a link, this is what I've herd informally from a couple people but I could be wrong. Where did you find information that suggested GDDR5 was lower power consumption then GDDR3?
it's not that the quantity of vram is lower it's that the 4850x2 uses gddr3 not gddr5, that's what ends up lowering power consumption. Well that along with the lower core clock.
I actually don't have a link, this is what I've herd informally from a couple people but I could be wrong. Where did you find information that suggested GDDR5 was lower power consumption then GDDR3?
I read your post way too fast, for some reason I thought you were comparing 4850x2 to 4870x2 and saying that the lower amount VRam on the former (assuming here that it's 512x2) will explain the power consumption delta. Lol sorry about that, i've been studying all day and my brain feels like apple sauce :/
Or could it be one of the classics, "30 percent less than their GDDR3 counterparts - when running at same effective clockspeed"?
So GDDR5 running at 500MHz (2GHz effective) would consume 30% less than GDDR3 running at 1GHz (2GHz effective)?