To put the Thermaltake Toughpower XT 750w through the paces, we will be incorporating OCCT power supply benchmark as well as my handy-dandy digital multimeter to test for line droop in the +12v rail when under load. During this 40 minute torture test, we will be keeping an eye on the Toughpower's built-in S.P.T indicator lights for signs of overheating and loss of signal.
Prior to the stress test, the multimeter shows the +12v to be running at 12.01v steady. I used Catalyst Control Center to crank up my GPU fan to 70% for duration of the stress test, as this benchmark maxes out both the CPU and the GPU to put the maximum strain on your power supply.
Subsequent testing with the multimeter both at the 20 minute and 40 minute mark showed the 12v rail to be steady at 12.03v. At no time during the benchmark did the voltage drop below 12v and the amperage was also rock-solid. To double-check, I tested the 4-pin Molex as well as testing the 6-pin PCI-E leads at the card solder points. All showed 12.03v for the duration.