The Corsair CS850M is a quiet and veryu affordable mainstream 850 Watt power supply that is 80-plus certified, that means it's 90% efficient at 50% load. Efficiency matters. The PSU itself is partly ... Review: Corsair CS850M Power Supply
I'm impressed with how well the CS series performs. A lot of people tend to dislike the CS series, but they're great for the price. Wouldn't this PSU be classified as semi-modular? I thought fully modular power supplies had a removable 24 pin main and 8 pin CPU connector.
Its a good value PSU by Corsair. Guru3d PSU reviews is a bit basic. No Cross Load Testing, no Noise/Ripple Tolerance testings, no info about the temperature at which these tests all done etc
If you've got to remove the power supply for any reason (like an RMA), you can leave all the cables hooked up.