Thermalright T-Rad2 Video Card GPU Cooler

Test System

I used my temporary LGA775 Intel test system to test the heatsink. The card I’m using is a voltage modified Gigabyte HD 4850 that’ll let me adjust the core frequency and voltage from a stock HD 4850, stock HD 4870, and a heavily overclocked HD 4850/4870. I used a single 25mm thick 120mm wide fan that rotated at 1200 RPM and blew 60CFM.

For testing purposes I started with a 15 minute idle period followed by a 15 minute load period with the average temperature measured for the final 5 minute of the load period. This was repeated for each frequency/voltage combination and then each heatsink was also completely tested three times with the average temperatures presented as results.

Intel Test Platform
Component	Brand/Model	Live Pricing
Processor	Intel Core 2 Quad QX9650	Click Here
Motherboard	Asus X48 Rampage Extreme	Click Here
Memory	Corsair PC3-14400C7 Dominator 2x1GB	Click Here
Video Card	Gigabyte HD4850	Click Here
Hard Drive	Seagate 7200.10 320GB	Click Here
Cooling	QX9650 Box Cooler	Click Here
Power Supply	Corsair HX1000 PSU	Click Here
Operating System	Windows Vista Ultimate	Click Here