will a agp 2x card work on my MSI K8N NEO2

[triscross]

all i want to do is test the card and board

 

[phaxmohdem]

IT should I believe all 8X AGP slots are backwards compatible with 4X/2X and 1X cards.

 

[triscross]

thought they were just wanted to ask the experts on here before doing stupid things!! thanks

 

[Peter]

NO! 8x AGP slots HAVE TO be backward to 4x mode, no further. They _might_ be backward compatible further, but quite commonly, they aren't. (That's because 1x/2x modes require PCI compatible 3.3V signalling, while 4x/8x modes use 1.5V signals.)

 

[triscross]

thankyou noy used it yet

 

[CCityInstaller]

I couldn't get an old Voodoo 3 AGP (2x) to work in my old NF2 based system that was AGP 8x. The card itself wouldn't fit into the slot properly. I dunno if it was an issue just with that card but I figured I'd mention it.

 

[Peter]

That's because AGP cards and slots are keyed, to prevent people from plugging cards into boards that don't provide the required signalling voltage.

E.g. 3.3V-only (1x/2x) cards don't fit into 1.5V-only (4x/8x) boards, and vice versa. "Universal" slots that switch the signalling voltage to best fit the card have no key tab, "universal" cards that run on either signalling voltage have two key notches.

Voodoo2 does 3.3V signalling only (not even being a proper AGP chip but actually a 66 MHz PCI device). NForce2, like all recent chipsets, does 1.5V signalling only.