So i got this vid card for 220 bucks right, and I think i'll research it a bit. I find out that the GPU over clocks really well. So i proceed to over clock it. I stack my voltage to 1188 and clock to 1100 and ram to 1400. Works decent, but temps are way to high, 90s. So I hack the stock cooler and jerry rig my arctic cooler from my 4890. I shim it up with a sleeve of copper since the gpu is recessed. Initially my temps drop 20 degrees, but when I apply the same OC the results are not the same. Now at 1150 mV, 1104 core, and 1500 Memory. 78 degrees temp Another interesting note, I can increase my voltage to 1250 and core to 1150 with 1500 memory speeds and the card runs stable until it reaches 85 degrees in temp. Before, i was unable to go beyond 1880 mV So my conclusion is: - Using shims decreases the ability of your cooler to deal with higher bound temps. Since my initial temps dropped 20 this is a little bit disappointing. I hoped that result would be reflected on the high end. It seems that the extra voltage required to break 1100 core barrier is beyond the capabilities of my arctic twin turbo cooler. you're lucky if your core xfx or similar designs OC over 1000 with acceptable temps. Good luck guys!