Hi . My english is not so good but I'll try to make my point . Not long ago I ran CPU ID monitor and it showed me that voltages are not stable.For instance...where it should be like 3.3V I have 2.004 V , on 5 V I have 3.387 V and on 12 V I have 8.064 V .I bought a secondhand power supply from my friend month ago (silverstone SST-ST85F-P ) and I havent notice that difference (because i haven't run any monitor programs,until now).I have gigabyte 990FXA-UD5 rev. 3 mobo , AMD FX 6350 ,ATi radeon 5850 and 2x4 GB of RAM (kingston hyper X) .So far I haven't notice any real performance loss.I ran all kinds of games on max. settings and it works fine.I don't know what to make of this.