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 PostPost subject: SLI with 2x EVGA 9800 GTX cards...        Posted: Wed Dec 03, 2008 6:47 am 
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So I just picked up an EVGA 9800 GTX from Newegg, and plan to get another around Christmas. However, I noticed that on the card there is not one, but two spots for SLI bridges. Does it matter where I place the SLI bridge on them?

I also noticed that they require an obscene amount of power. Currently, I have a 550w psu, and I have a feeling it isn't going to be enough. What power psu should I get to accommodate the following:

AMD Athlong 64 X2 5600+
3GB 533mhz DDR2 ram
2x EVGA 9800 GTX cards
2x 7400 RPM HDDs
2x DVD Drives
5x 12v fans

Currently, I have all of the above, minus the 2 9800 GTX cards. Just replace the 9800 GTX cards with 8600 GT cards and you will have my current build.


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 PostPost subject:        Posted: Wed Dec 03, 2008 6:53 am 
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I do believe that it doesn't make a difference where the bridge goes, but you should check the manual of either GPU. The reason that it has two connectors is for 3-way SLI.

As for the PSU, nVidia has an "official" list of PSU's that will work with SLI. Just choose Dual 9800GTX's and look at the list.
http://www.slizone.com/object/slizone_build_psu.html


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 PostPost subject: Re: SLI with 2x EVGA 9800 GTX cards...        Posted: Wed Dec 03, 2008 8:37 am 
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Bigern1990 wrote:
So I just picked up an EVGA 9800 GTX from Newegg, and plan to get another around Christmas. However, I noticed that on the card there is not one, but two spots for SLI bridges. Does it matter where I place the SLI bridge on them?

I also noticed that they require an obscene amount of power. Currently, I have a 550w psu, and I have a feeling it isn't going to be enough. What power psu should I get to accommodate the following:

AMD Athlong 64 X2 5600+
3GB 533mhz DDR2 ram
2x EVGA 9800 GTX cards
2x 7400 RPM HDDs
2x DVD Drives
5x 12v fans

Currently, I have all of the above, minus the 2 9800 GTX cards. Just replace the 9800 GTX cards with 8600 GT cards and you will have my current build.


For the PSU, the big thing is:

How good is the PSU (was it a 10 dollar PSU that came with your 20 dollar case or a PC Power and Cooling PSU, which are friggin awesome)?

And, how many amps are on the 12V rail?


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 PostPost subject:        Posted: Wed Dec 03, 2008 1:38 pm 
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Why do you want to buy 2nd 9800? One is enough for all games. And also for more demanding applications one is enough. If I were you, I would replace those 3Gb of Ram with 2x2GB and change CPU for 6xxx+ serie instead of 2nd 9800.


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 PostPost subject:        Posted: Wed Dec 03, 2008 6:39 pm 
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pkubaj wrote:
Why do you want to buy 2nd 9800? One is enough for all games. And also for more demanding applications one is enough. If I were you, I would replace those 3Gb of Ram with 2x2GB and change CPU for 6xxx+ serie instead of 2nd 9800.

Neither of those will make a big difference. If it is not a prebuilt PC, most likely its in a 2x1GB + 2x512MB setup, which is still dual channel. Therefore switching to 2x2GB would just be a waste of money. Also upgrading from an X2 5600 to a 6000 would give you a limited performance boost... since its only 200 mhz.

Also the performance difference between 1 and 2 9800GTX's is fairly big.

http://www.guru3d.com/article/geforce-- ... view-bfg/7


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 PostPost subject:        Posted: Wed Dec 03, 2008 9:38 pm 
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 PostPost subject:        Posted: Thu Dec 04, 2008 1:42 am 
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pkubaj wrote:
Why do you want to buy 2nd 9800? One is enough for all games. And also for more demanding applications one is enough. If I were you, I would replace those 3Gb of Ram with 2x2GB and change CPU for 6xxx+ serie instead of 2nd 9800.


If he's got a fairly large resolution, a 2nd 9800GTX can be quite beneficial. More than a new CPU and an extra gig of RAM.


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