PSU real-world differences between PSU v2.2 and v2.31?

[pope7]

Is there a real-world difference between ATX12V PSU's when they are listed at V2.2 and V2.31? I'm a plebian, pretty confused.

the PSUs I'm looking at, specifically, are:
http://www.newegg.com/Product/Product.aspx?Item=N82E16817171046
and
http://www.newegg.com/Product/Product.aspx?Item=N82E16817822008

 

[GhislainG]

As found on Wikipedia:

ATX12V v2.1
This is a minor revision from March 2005. The power was slightly increased on all rails. Efficiency requirements changed. Added 6-pin connector for PCI-E graphics cards, that aids the PCI-E slot in the motherboard, delivering 75 watts.

ATX12V v2.2
Another minor revision. Added 8-pin connector for PCI-E graphics cards, that delivers another 150 watts.

ATX12V v2.3
The most recent revision, effective March 2007. Efficiency recommendations were increased to 80% (with at least 70% efficiency required), and the 12 V load requirement was lowered. Higher efficiency generally results in less power consumption (and less waste heat), and the 80% recommendation brings supplies in line with new Energy Star 4.0 mandates. The reduced load requirement allows compatibility with processors that draw very little power during startup.

 

[pope7]

Best answer selected by pope7.

 

[pope7]

Thank you!

 

[GhislainG]

If you want to know more about PSU specifications, you can read Intel's guide: http://www.google.ca/url?sa=t&source=web&ct=res&cd=1&ved=0CAcQFjAA&url=http%3A%2F%2Fwww.enermax.cn%2Fenermax_pdf%2FPower_Supply_Design_Guide_Desktop_Platform_Rev_1_2.pdf&ei=dxR7S-mOMoiWtgfR-MHICg&usg=AFQjCNGyNoP6Icvv0JdqATopddFiqTaphQ