Originally posted by: surfer58
Hey guys, I'm new to this forum, and semi-new to building computers. Anyway I just bought a A8N32-SLI, and I've heard that Antec power supplys don't work well with this motherboard. I also read that for this motherboard you really should have a power supply that is 500W or more. I really like the Sonata II case (which comes with a 450W power supply), and I was wondering if these two things are something that I should worry about and buy a different power supply, or if it doesn't really matter. Also, are there any other cases that come with a 500W power supply or better that would be good for this setup? Thanks in advance!
I've seen many, many posts about Antec PSUs crapping out under heavy 3D SLI loads with this MB. It's not to say that they definitely will--just a disproportionately large number of seemingly PSU-related problems with Antec...otoh, yours comes free with an excelent case--I'd pay the same for that case without a PSU--you might as well try it, it won't hurt anything and you should know pretty quickly if you need something better.
As to total power requirement...the rated total power of a PSU (i.e. 450W, 500W, etc.) is almost meaningless...the most important power rail these days for a socket 939, nVidia SLI MB is the +12V rail. That is the output that will be demanded by the CPU and the video cards and they will be sudden and heavy demands when you go into 3D games in SLI...everyone with PSU complaints has the same issue: everything going along fine and a few minutes or 1/2 hour into a game the computer shuts-down, re-boots or whatever...otherwise, they can run all day in 2D mode with no problems at all.
You also want to have a look at other factors when selecting a PSU...just how steady and clean is that voltge?
I'm not pushing Seasonic on anyone...just passing along my own conclusions after much research--I couldn't find the MB for a month so I had lots of time to plan
Tom's HW stress test of many PSUs:
link
Silentpcreview of the S12-500 & 600:
link
The 500 is good enough, but I went with the 600 because I found it cheaper than what most places sell the 500 for and the extra 100W in the 600 is all on the 12V rail.