Well, I am currently using an Abit IL9-Pro, and a Core 2 Duo e6320.
I am planning on upgrading to an SLI motherboard, selling my current 8800GT and buying two 9600GT's.
My main question is if my current power supply will handle two 9600GT's. It's been powering my 8800GT for half a year now without complaints, I'm not at all worried about its quality. I don't really have the money to buy a new PSU, so please do not recommend something else.
The extreme power supply calculator says that 309 Watts will be enough, but I'm worried about the rails.

Definately a no name PS. Id give it a shot though. The big question is do you have a lot of HDs, DVD/CD drives in the PC? If your running a single HD and DVD/CD you shoudl be OK.

something tells me that wouldn't be enough - but wouldn't it be more sensible to just buy a new 8800 gt? because you will lose money from selling the original

Sorry, a $29 PSU at 580W is going to be cr@p!! How can you spend hundreds of dollers on a system, then pay only $29 for the PSU! No name PSUs struggle to give 75% of their rating and are often unstable on output volts as well. You need a good name at about $90 or more for peace of mind.

Mike.

Well, excuse me, "Mike".
If you read the OP, that PSU has had absolutely no problems whatsoever.
I've been powering a mid range system for half a year with it, no problems.
Doesn't get hot.
Works beautifully.
Also, spuddyt, the 8800GT's in SLI perform much worse than 2 9600GT's in SLI.
The benchmarks tell no lies.
I don't mind spending an extra hundred for 2 9600's.
Also, HEC has been around for quite a while, and sell very nice quality products.
Price isn't everything you realize.
http://www.hec-group.com.tw/

sorry, i didn't know about performance scores, i just assumed better card + better card = better performance, but i guess i should have known....

Things aren't always what they seem I guess.
They like to trick us.