I've just got into focus stacking and the program I'm using eats all of my 4GB of Corsair XMS2 DDR2 RAM running @1066MHz.
My mobo is an Asus M2N68-VM with an Athlon X2 7750 BE CPU @ 2.7GHz running Windows 7 64bit and 8GB RAM capability. The mobo will run AM3 CPU's with a BIOS update.
The easy way would be to bang another 4GB kit in, but from what I've learned in the Corsair forum this can be a very hit and miss proposition, even with chips with the same revision No. Any 2 x 4GB kits I found were very exxy. I'm not even sure they will run at 1066MHz.
The other option is to swap the 7750 for an AM3 unit (from $80 for 2 cores to $150 for a 955 quad core black edition) and get some fast DDR3 RAM, around $140 for 1066MHz to $200 for 2000MHz then sell off the old CPU and RAM.
Asus only seem to go half way with their product updates, i.e. no mention of DDR3 RAM on their QVL for the now AM3/DDR3 capable mobos.
The update route seems to make sense to me if I can clarify what RAM will work in the updated mobo. I'll check in the Asus forum and maybe get an answer.
Any thoughts appreciated. When I get my head into something like this, I often have trouble seeing the forest.