Ok, I want to sharing my experience with Arctic Silver 5. I know, it is not a killer VGA card. But that's the only I have currently. And I just buy Arctic Silver 5 for my CPU, so I told myself, why don't I use it on GPU cooler? My Card: ATI PowerColor ATI x1600pro 512MB AGP. GPU Cooler: Zalman VF900CU-LED. Before using Arctic Silver 5, I am using heatsync grease come with zalman kit. After I applied Arctic Silver 5 and put everything back, idle and workload temp of my card drop 1degreeC. I am still on 1-2 hours by writing this post. According to manufacturer, Arctic Silver 5 need 200hours cooling down for best performance. Regards, Arto.