some of the tr2 series are noted for being poor quality PSU's. There are a couple of good models in the range. http://www.tomshardware.com/reviews/power-supply-oem-manufacturer,2913-9.html
<look at this table, your PSU is made by HEC, all the thermaltakes made by HEC are poor. The Channel Well models are good, mostly. Anyway, ditch that psu now before you blow something up.