Thermaltake Toughpower GF3 Snow 1200 Watt ATX 3.0 Power Supply Review

Cross-Loads

3.3V and 5V are tested at 10-100% loads together, and then 12V is tested in the same fashion. This shows us if the PSU is able to maintain its target voltage regulation while delivering different loads. Ideally, you want to see this within 5% deviance, but under 3% is better, and of course, the lower the better with 0.00% change being the ideal result.

The rails were remarkably consistent in both load scenarios, with the 3.3v rail largely retaining a -0.3v deviance, and and 5v a -1.4v deviance. The 12v rail did drop to -3.6% at 20% load, but this was only on the 12VHPWR header, not the 24-pin or CPU 4+4 pin, so certainly won’t be an issue for a low-load GPU.