Hello,
I have an old XPS 630i I bought from DELL back in '08. Recently my single GPU kicked the bucket (512 MB GeForce 8800 GT). Well rather than spending all the money on getting a new mobo/CPU/upgrade RAM/Win 7 64-bit to make the most out of being compatable w/ PCIe 2.0+ for all the latest GPU's, I'd like to make the most of everything else that's still working in my old 630i. What I feel many people didn't realize about Dell's, specially made (i.e. they manufactured it) nforce 650i SLI, is that when you're only running a single GPU off of this mobo designed primarily for old SLI cards, it's only running on PCIe 1. x8 and not x16 as so many would expect. Many other mobo's that do run in 2 x 8 mode can switch to make full usage of 1 x 16, including other manufacturers of the nForce 6 series, but this one simply wasn't designed that way. I guess their attitude was "take it or leave it, x 8 is the most lanes you're getting, might as well double it up". My question is, in fear of the obvious x8 bottle neck (remember this isn't PCIe 2.0 this is 1.0!) for a single high performance card, what would be the highest performance SLI cards I could get before the x8 renders it +/- 1%, 5% inefficient due to the bottle neck (I know SLI is only ~1.86 times as powerful as only using one of the same GPUs but I feel since x16 is not compatible with my mobo 2 x 8 is my best performance option). I've spent hours searching this problem, it seems my rig is getting really antiquated since I can't find a simple answer after hours of research to what the best GPU in SLI I can run on 2 x 8 before there's a PCIe bottle neck. Many thanks in advance!!
I have an old XPS 630i I bought from DELL back in '08. Recently my single GPU kicked the bucket (512 MB GeForce 8800 GT). Well rather than spending all the money on getting a new mobo/CPU/upgrade RAM/Win 7 64-bit to make the most out of being compatable w/ PCIe 2.0+ for all the latest GPU's, I'd like to make the most of everything else that's still working in my old 630i. What I feel many people didn't realize about Dell's, specially made (i.e. they manufactured it) nforce 650i SLI, is that when you're only running a single GPU off of this mobo designed primarily for old SLI cards, it's only running on PCIe 1. x8 and not x16 as so many would expect. Many other mobo's that do run in 2 x 8 mode can switch to make full usage of 1 x 16, including other manufacturers of the nForce 6 series, but this one simply wasn't designed that way. I guess their attitude was "take it or leave it, x 8 is the most lanes you're getting, might as well double it up". My question is, in fear of the obvious x8 bottle neck (remember this isn't PCIe 2.0 this is 1.0!) for a single high performance card, what would be the highest performance SLI cards I could get before the x8 renders it +/- 1%, 5% inefficient due to the bottle neck (I know SLI is only ~1.86 times as powerful as only using one of the same GPUs but I feel since x16 is not compatible with my mobo 2 x 8 is my best performance option). I've spent hours searching this problem, it seems my rig is getting really antiquated since I can't find a simple answer after hours of research to what the best GPU in SLI I can run on 2 x 8 before there's a PCIe bottle neck. Many thanks in advance!!
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