Hi,

I'm working on an ITX build and ran into a snag. There are two PSUs that seem virtually identical to me, but have wildly different costs on Amazon and Newegg:

1. CORSAIR SF750 80 PLUS Platinum SFX, SKU: CP-9020186-NA

2. CORSAIR SF750 80 PLUS Platinum SFX, SKU: CP-9020284-NA

On Corsair's own website there is a $5 price difference (before any discounts), but on their Amazon storefront the price difference is nearly $100. On Newegg, it's even worse at a nearly $200 price difference.

The only differences that I have noticed are:

1. the cheaper version is consistently marketed as "ATX 3.1 compliant, supporting PCIe 5.1"

2. as per tech specs, the cheaper version has less SATA and PCIe connectors, but 1 PATA connector

3. as per tech specs, the cheaper version is a "fluid dynamic bearing" fan vs "rifle bearing" fan on the more expensive one

This is my first build, so none of these differences mean anything to me. Please help! Which one is most appropriate for my build? Also, if the SF750 goes out of stock, it wouldn't hurt to get the higher wattage versions in a pinch, correct?

Thank you!