Is there such a thing as a PCI RAM card?

[Bookworm]

I know how RAM is addressed though the chipset and that the PCI bridge seperates the PCI bus from the chipset. So I know this sounds like a pretty stupid question, but I decided to ask it anyway just to make sure. (Beleive it or not, even I don't know everything.)

Is there any such thing as a PCI RAM card that is *not* a RAMDisk, but that would add more RAM to the system than the motherboard will hold?

If so, is it compatible with the SelectaDock III? ISA RAM cards are not because it doesn't have a required refresh signal. IBM probably left it out on purpose because 16 bit RAM wouldn't be compatible with a 32 bit ThinkPad anyway; but would this be a problem for PCI RAM Cards, if they exist?

[Radioguy]

Hmm, I've seen proprietary riser boards in some servers and NLX desktop clients with things like that, but not an outright pci card that could take DIMMs.

Until...

http://icrontic.com/forum/showthread.php?t=33094
http://techreport.com/articles.x/9312

However, that's not what you want, since it only uses DIMMs as a SSD alternative.

A comment here touches on why it apparently can't be done:

http://www.tomshardware.com/forum/12802 ... sion-cards