Weâ€™ve obviously seen SLI on a stick several times before with the GeForce 7900 GX2 and GeForce 7950 GX2, but never before have we seen SLI on a single card using a pair of GeForce 8M-series chips. This is where MSIâ€™s GeForce 8600 Geminium fits in â€“ itâ€™s based around a pair of GeForce 8600M GT MXM modules each with 256MB of memory.
The modules are upgradeable and you should have a reasonable amount of headroom for upgradeability thanks to the PCI-Express power connector on the cardâ€™s main PCB. However, we doubt that youâ€™re going to be able to upgrade much beyond this current power envelope, because power requirements (and heat) will spiral out of control with anything more powerful.
We were actually quite surprised when MSI said that this isnâ€™t just a concept design â€“ itâ€™s something the company is planning to bring to market in the near future. Of course, because of the way the card is laid out, youâ€™re going to need at least one slot free either side of the card, and maybe more than that.