I decided to go with the Seasonic over the Antec for a few reasons:
- I didn’t feel that 500W was enough over the 450, which was underpowered.
- It has six 4-pin plugs instead of five, and I will use all of them for 2 optical drives, 2 hard disks and 2 fans.
- It got much better ratings on the Tom’s Hardware 6-week stress test, and never ventured outside ATX12V spec.
- The main draw of the Antec was that its fan stayed off until 200W was drawn, but my board will probably always require at least that much.
As a testament to how good the Seasonic is, I had to go to close to 20 different sites to find one where the S12-600 wasn’t either back-ordered or selling at a rip-off price.