Testing:
I tested this power supply by plugging it into an older computer for a burn in period of 24 hours before testing. After the 24 hour burn in period I tested the out put voltages with a FLUKE digital multimeter at the ATX connector, all values are compared to the current ATX standard of 2.2 visible here.
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The following table displays the results for my testing I attempted to test under varying load requirements simulating a 20%, 40%, 60%, 80%, and 100% of the rated maximum capacity unfortunately my tests were not dead on, the percentages differ slightly which I noted on the top of the table.
| Input | Load=19.5% | Load=39.6% | Load=59.4% | Load=79.7% | Load=99.4% |
| +12v1 | 5A ( 60W) | 11A (132W) | 16A (192W) | 22A (264W) | 27A (324W) |
| +12v2 | 5A (60W) | 10A (120W) | 16A (192W) | 21A (252W) | 27A (324W) |
| +5v | 2A (10W) | 4A (20W) | 6A (30W) | 8A (40W) | 10A (50W) |
| +3.3v | 2A (6.6W) | 4A (13.2W) | 6A (19.8W) | 8A (26.4W) | 10A (30W) |
| -12V | 0.5A (6W) | 0.5A (6W) | 0.5A (6W) | 0.5A (6W) | 0.5A (6W) |
| +5VSB | 1A (5W) | 1.5A (7.5W) | 2A (10W) | 2.5A (12.5W) | 3A (15W) |
| TOTAL : | 147.6W | 298.7W | 449.8W | 600.9W | 744.9W |
| Room Temp: | 75oF – 25oC | 75oF – 25oC | 75oF – 25oC | 75oF – 25oC | 75oF – 25oC |
| PSU Temp: | 75oF – 25oC | 75.9oF – 25.5oC | 77.1oF – 26.2oC | 84.36oF – 30.2oC | 82.7oF – 29.3oC |
| Voltage Stability: | Pass | Pass | Pass | Pass | Pass |
| AC Power draw: | 175W | 348W | 528W | 718W | 894W |
| Efficiency: | 84% | 85% | 85% | 83% | 83% |
After reviewing the table above it is clear that this is a very stable and efficient power supply firmly that has planted itself in the 80Plus bracket. There is a slight drop in efficiency at higher power levels but nothing that’s all that unexpected overall a very nice power supply.
Conclusion:
Overall the Thermaltake Toughpower XT 750w was a power supply that seems to have everything going for it, while it doesn’t really do anything new it does maintain a very solid standard. The testing that the power supply has over gone shows that it can maintain a solid operating core with only minor temperature increases which is fully to be expected under heavy load, if anything I would have expected a larger increase. While the Toughpower XT 750w is not the most efficient power supply on the market it does score a very solid 80% efficiency and let’s face it, if you’re using a 750W power supply your probably not too worried on the power consumption, you are probably more worried about the performance of the PSU and how its stability affects your components. Overall I would recommend this power supply to anyone who is looking for a solid performer for a performance rig but not looking to be a guinea pig for any new fangled features. Once again Thermaltake delivers an excellent power supply and at an excellent prict for a PSU in this category and wattage. It is nice to see Thermaltake not compromising on quality while keeping the pricetag low.
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