Go to Nvidia's site called SLIzone. They have a PSU recommendations thingy there. U can see exactly what PSUs have been certified for SLI usage by Nvidia according to which cards ur using.

Ya...is enough...each GTS250 just need 1 6 pic Power Conenctor only...Sliverstone ST56F PSU got 2 6 pin power connector so is very enough

Thank you all. I was browsing through SLIzone but didn't find my PSU there. I was considering GTX260+ as a single card solution if my PSU can't handle the SLI configuration. So if what Cid said is true, then I can start saving money for another GTS250 card.

lol...560W PSU sure enough run both GTS250....even single GTX295 aslo no problem...tested by goldfires already

another SLI user,currently using dual gigabyte 9800gtx+ and my experience is, not every game could possible get a good performance when enable SLI mode. Intially i predicted it is like double performance when playing any game in SLI mode. well, there are 2 games that seems to get a quite good performance which are CRYSIS warhead and FARCRY2.

SLI mode
For crysis warhead, running at 1440x900, max setting but without AA runs at average 35-40fps. (Disable SLI >> 20-25fps)

For farcry2, running at 1440x900, ultra high with AAx4 runs at average 60fps. (Disable SLI >> 40-45fps)

So far the rest of the game does not seems like increase that much performance when enable SLI mode somemore drop.

seems that sli need more room for improvement..i hope nvidia can fix this..

It's already very good. Especially now that it does multiple screens set up which ppl have been asking for such a long time. Anyway, the guy's expectation of 100% improvement is unrealistic. 2 way sli scales about 50%. For 100% improvement u need 3 way sli.

i dont think nvidia is the one that needs to fix anything...

i believe its more to the game developers to include multi-gpu support into their games.

like COD4...really benefits from SLI.... from my own test which i posted on page 15

really, nvidia need no fixin, it's the game itself which need. the software developer need to look in this matter..sli is not for all games though

Most of the big titles run SLI. The smaller titles that don't utilize SLI are mostly not very intensive n run fine on 1 card anyway.

Most Big Games does Support SLI but it also need takes times to make it support

-GTA4 is big games but it does not support SLI..very bad news.
-Big games like HAWK at 1st month it release it does not support SLI but after 1 month Nvidia rlease newest driver then this game support already.
-Big games like Empire Total War it takes 3 and half month to wait for Nvidia release new drive that make this game support SLI

OoOo..really... this sli things do take time yeah..i don't know about the graphic designer that use more graphic power, but it still need a foot hold in the gaming industry..

This post has been edited by PootieTang_85: Jul 5 2009, 01:40 AM

heh gtx295 also count as sli kan?

quite fun to test out the single card/split screen/a.f.r.(alternate frame rendering)1 or 2 rendering method.

tested on prototype with split screen and a.f.r 1 suffers major performance hit.

GTX295 is consider a SLI card......if taht game no support SLi it perform same as GTX275

but isnt gtx295 single gpu is equal to gtx260 only?

very nice to have GTX295 card..is it true can operate as single performance card when the game can't support sli? and operate full performance when supported game running sli mode?.. pretty cool huh..

Can sli perform better in RTS games like companay of heros, red alert, war hammer.....and upcoming starcraft 2 ?

Of coz SLi will perform better as long as the game supports it....

Thanks, because I seldom see people mention RTS games in SLI.

Actually, COH is very common for that....

And if Starcraft 2 were to be released, I bet all systems must be SLi equipped to play this game (if it supports SLi that is) coz during beta testing, all the test machines couldn't take it when a lot of units are flooding the screen....