I sent back my powercolor EZ edition after being disappointed by the stock cooling and replaced it with the sapphire 7870xt. Very pleased with the swap. The sapphire runs super cool, 55 degrees is as hot as it gets while benching. Using stock voltage (1156) with no power limit increase and I am able to get 1200mhz core / 1550 mhz memory. No artifacts when benching, also used OCCT w/ 4 shaders for 1 hour, no problems. I believe I've maxed out my work rig now.
My 3dmark11 scores are pretty low compared to others I've seen in this thread, I'm attributing this to my ddr2 rig.
the tahiti le is a TERRIBLE deal at current prices... if you didn't get one for $160 after selling the game + rebate/etc during the big sale.. you're better off returning the "saph xt" you have now, and buying a 7950 @ $250, because it also comes with the free games which you sell for $50 and final price is $200..
I'm not saying you got a bad card, I'm just saying you have better alternatives, if you want to spend $200 as opposed to the rest of us ghetto kidz