Originally posted by ddp:

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have to be same videocard.

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Originally posted by Estuansis:

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No they don't share memory. It's not 2GB of video memory, it's 2 cards with 1GB each.

PSU will matter. What brand is your PSU, and if you can, tell us how many amps it has on the +12v rail.

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Originally posted by scorpNZ:

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They share the work load for graphic intense apps including games,one would assume faster processing since you'll have two gpu's working at the same time

edit: http://en.wikipedia.org/wiki/Scalable_Link_Interface

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Originally posted by Estuansis:

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It increases FPS by sharing GPU load. Think of it as a grid of squares on your screen. Each alternating square is rendered by one card. Each other square is rendered by the other card. In a perfect scenario it will double your FPS. But in real life it's usually 60-90% faster depending on the game.

Your PSU would definitely be an issue. It's cheap and is a low quality brand.

For 700W in a quality unit you should be paying more like 3 times that much. http://www.newegg.com/Product/Product.aspx?Item=N82E16817139006&cm_re=corsair-_-17-139-006-_-Product

I would definitely replace your PSU before getting 2 cards.

This would be perfect for your setup. http://www.newegg.com/Product/Product.aspx?Item=N82E16817139005&cm_re=corsair-_-17-139-005-_-Product

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Originally posted by Estuansis:

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To answer your other question probably nothing right away. But the chance will always be there that you could overload the PSU. If it fails, it will probably take other stuff with it. Dead video cards and hard drives are not uncommon from a bad quality PSU.

I would guess a unit like that is actually doing more in the range of 450-500W, if that.

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Originally posted by Estuansis:

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lol no that's quite a heavy system for such a low quality PSU. It's not a matter of how long it will last. It could fail at any time. And it will more than likely kill other stuff given it's low price. If you are planning to make an upgrade, sacrifice a bit on some other things to squeeze a better PSU in. Do not depend on it to last you for any length of time. I'm speaking from experience here. It WILL fail if you put a high end system on it.

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Originally posted by Estuansis:

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As far as your Bro's power supply it was cheap crap plain and simple. 1.5 years is a terrible lifetime and he didn't lose anything because he was lucky. Power supplies are super important. My Seasonic built Corsair 620W has been running for 2 and 1/2 years now on everything from dual cores to my current overclocked quad core with 2 video cards. And for 620W it was $150.

And the video card yeah it will work. As long as the number is the same you are good to go. Getting an overclocked one won't help your speed though because they will both run the same as the slowest card in the pair.

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