I first contacted ATXPowerSupplies.com in February 2013 to get an upgraded power supply for my Compaq Presario SR1910NX. Their web site has great advertising and promptly pushed me to select the 630 Watt power supply. I ordered and paid for the unit. They emailed me that it was on the way. I got a completely different power supply that had connectors that didn't match my PC. I contacted them, got an RMA, paid for return shipping and they sent me the power supply that I originally wanted about 10 days later. It is now late December 2013 and that power supply is still working without any problems. Initially I was an unhappy customer but they finally got my order right and I'm happy about the choice of the 630 Watt power supply now.