May be an OK brand, but the TR2 430W from
http://www.hardwaresecrets.com/article/Thermaltake-Purepower-430W-NP-Power-Supply-Review/332/9 (Hardware secrets is known as one of the very few, perhaps 3-4 sites that have reliable PSU testing, along with jonnyguru and a few more) was said to be a 'The main problem with this power supply is that it can’t deliver its labeled power. It is, in fact, a 350 W power supply.' - When it was listed as a 430W psu.