I want to buy a PSU and I don't know which one is better:
Thermaltake Smart 630W http://i1236.photobucket.com/albums/ff450/MacClipper3/Thermaltake/Smart%20SE%20630W%20PSU/IMG_6201Copy_zps8b5406fa.jpg~original
or the CoolerMaster GX 550W
http://www.coolermaster.com/upload/product_feature/GX550_label.jpg
Thermaltake Smart 630W http://i1236.photobucket.com/albums/ff450/MacClipper3/Thermaltake/Smart%20SE%20630W%20PSU/IMG_6201Copy_zps8b5406fa.jpg~original
or the CoolerMaster GX 550W
http://www.coolermaster.com/upload/product_feature/GX550_label.jpg