radeon 7000's?
yes. a 7970 can do what? 550-700 mh/s depending on who you ask, what model, over clocking, etc...
So that is like bringing online two 5830s at once. Nothing to sneeze at really. Just multiply it by your guess
how many were bought by forum members and gamers who know about bitcoins... and you can consider it
a nice chunk of mining power.
Also every other gamer turned miner who had access to a 7xxx model worth mining some btc with.
Sure I know they are not the best card to mine with compared to older models but they are not slouches
either.
Every little bit adds up when people notice the price rises and wants in. Even if only .2 BTC per day.
*cough* 5970 is 740mhash easy. cheaper price