More aboutdifference evga nex normal evga power supply
The one from Amazon (Scan) is the G2 version, which is a lot better in terms of internal component quality and power regulation.
the first one is not a very good one and not recommended. the second one is a g2 model which is top quality and very worth the price over the g1 version.
go for the g2 unit, you won't regret it
The NEX750G is a discontinued model that uses FSP as the OEM. It had poor voltage regulation and failed Intel Haswell compatibility testing due to its old group regulated circuit topology. The noisy cooling fan was also another complaint.
The SuperNOVA 750 G2 is definitely the one to get.