So iv had my PSU for a very long time, from like 2009, cost me about £130 at the time so wasn't cheap. At the time, i didnt know much about power supply's and basically went on reviews which where positive for the unit, but it was all the rage at the time to have lots of rails [this has 6!]. Now i know your much better off having a single strong rail. The PSU is the Coolermaster Real Power 850w [RS-850-ESBA] Now when do you upgrade your PSU? Do you wait till it starts behaving bad, or even starting to fail? risking your hardware? or do you replace it every 5 or so years? This unit came with a 5 year warranty and in 2009 that was saying something, so it was built well and i could possibly double its service life in my PC and save spending £150 odd, (if i was to buy new ill be getting platinum or titanium efficiency] Just wondering what other bit-techers do on the subject.