I review power supplies. Most run 18 AWG wire on the peripheral cables, regardless of OEM... never assume they'll handle much power.
I know you and read your reviews alot.
The seasonic's burn on the pcie jacks a lot.
This particular thread he burned a sata jack.
But trust me many pcie jack burn on the seasonic and if I am right they are 18ga not 16ga.
I just got a rosewill titanium from newegg yesterday the 1500 watt
I got it at 250 usd (sale and coupon) it will run my pandaminer.
http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story&reid=501this is your review if I am correct. After reading it I thought it was worth buying