What is the difference between atx v2.2 and v2.3?

astalstain

astalstain

astalstain

Associate
Joined
26 Oct 2011
Posts
7
Hey relatively new to the whole rig building thing, but was wandering for my gaming rig:
i7 2700k
MSI GTX 580 Lightning Extreme
Asus Maximus IV 1155
16GB 1600MHz DDR3
Coolermaster Storm Trooper
Western Digital Caviar Blue 750GB 6GB/s
60GB SSD Corsair Force Series 3 Series SATA III
Corsair H60 Water Cooler
Deciding on Power supply, but was thinking: Powercool PCPC850AUBA 850W Power Supply

Should i get a v2.3 or v2.2 for my specs and what is the difference between the two? Finally, how do you measure how much power you need for your rig or do you just kinda guess?
Thanks, JP
 
ATX12V v2.2

Another minor revision. Added 8-pin connector for PCIe graphics cards, that delivers another 150 watts.

[edit] ATX12V v2.3

Effective March 2007 and current as of 2011. Recommended efficiency was increased to 80% (with at least 70% required), and the 12 V minimum 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.[14] The reduced load requirement allows compatibility with processors that draw very little power during startup.[15] The absolute over-current limit of 240VA per rail was removed, allowing 12V lines to provide more than 20A per rail.
Click to expand...

Does that help?
 
All modern PSUs should be 2.3 really, as it added energy complaince legislation, increased efficiency to the 80% standard
I wouldnt personally buy that PSU, youre best getting a decent quality brand PSU
Your system would be fine with a 650W PSU such as this one
 
Thanks to both of you! Going back to my previous question do you just guess the wattage needed or do you actually look at the power consumption of each part and decide from there?
Thanks again!
 
If you look at a decent review site such as anandtech and look at the review of the gfx card, as thats the most demanding part of system, it will tell you what they tested the peak system load to be, whilst in theory you could get a PSU thats just above this, I prefer to allow yourself a little headroom for overclocking and loss of efficiency which diminishes over time
Anandtech Bench 580
 
You must log in or register to reply here.
Back
Top Bottom