Compatible AGP at 16x?

Look on the 2nd page of your pdf document, under the first heading "Graphics Interface", it shows PCI Express with explanation "Supports the latest add in graphics cards and other features with FULL x16 implementation. Delivers 4GB/sec. in both upstream and downstream data
transfers"

The picture you posted (and I found, downloaded and read the entire document) doesn't mention YOUR card or YOUR motherboard at all, as I had expected it would.

Both XFX and Asus say their products run at 16x, since 16x is the top end of the supported video bandwidth for their products.

I did find an AGP version of the 7600GT which, of course, runs at 8x due to AGP, but your motherboard supports 16x and so does the single XFX 7600GT.

Word to the wise:
Never depend on Nvidia specs on a non-Nvidia product, even though it has an Nvidia chipset. Instead use the manufacturer documentation. (in this case, it would be XFX and Asus)

ZT3000
"Beta tester of "0"s and "1's" Look on the 2nd page of your pdf document, under the first heading "Graphics Interface", it shows PCI Express with explanation "Supports the latest add in graphics cards and other features with FULL x16 implementation. Delivers 4GB/sec. in both upstream and downstream data transfers" The picture you posted (and I found, downloaded and read the entire document) doesn't mention YOUR card or YOUR motherboard at all, as I had expected it would. Both XFX and Asus say their products run at 16x, since 16x is the top end of the supported video bandwidth for their products. I did find an AGP version of the 7600GT which, of course, runs at 8x due to AGP, but your motherboard supports 16x and so does the single XFX 7600GT. Word to the wise: Never depend on Nvidia specs on a non-Nvidia product, even though it has an Nvidia chipset. Instead use the manufacturer documentation. (in this case, it would be XFX and Asus) ZT3000 "Beta tester of "0"s and "1's"

One more thought:

Two SLI cards at only 8x definitely outrun a single 16x card, but why?

Because it's not the bandwidth (16x, 8x, etc lanes) that is the most limiting factor, it's the processing power of the card.

First-generation PCI-e is often quoted to support a data rate of 250 MB/s in each direction, per lane.

This figure is a calculation from the physical signaling rate (2.5 Gbaud) divided by the encoding overhead (10bits/byte.) This means a 16 lane (x16) PCIe card would then be theoretically capable of 250 * 16 = 4 GB/s in each direction.

Your video card will only have 256MB installed, cannot process enough information to fill 4GB/s and will not come close to a 4GB per second transfer rate. PCI-E also has signalling overhead which eats into the bandwidth.

Reading the technical information on most, if not all, computer products will only reveal that the marketing folks are much more adept at spouting unusually high figures than the hardware folks can keep up with.

ZT3000
"Beta tester of "0"s and "1's" One more thought: Two SLI cards at only 8x definitely outrun a single 16x card, but why? Because it's not the bandwidth (16x, 8x, etc lanes) that is the most limiting factor, it's the processing power of the card. First-generation PCI-e is often quoted to support a data rate of 250 MB/s in each direction, per lane. This figure is a calculation from the physical signaling rate (2.5 Gbaud) divided by the encoding overhead (10bits/byte.) This means a 16 lane (x16) PCIe card would then be theoretically capable of 250 * 16 = 4 GB/s in each direction. Your video card will only have 256MB installed, cannot process enough information to fill 4GB/s and will not come close to a 4GB per second transfer rate. PCI-E also has signalling overhead which eats into the bandwidth. Reading the technical information on most, if not all, computer products will only reveal that the marketing folks are much more adept at spouting unusually high figures than the hardware folks can keep up with. ZT3000 "Beta tester of "0"s and "1's"