I'm using this setup currently, it's a few years old:
Intel COre 2 duo 3.0ghz CPU
nvidia 8800 GTS gcard
ASRock g34 twin fullHD mobo
1ghz DDR2 Mushkin RAM

I would like to get a RAM upgrade. I've purchased multiple RAM versions with these requirements:
DDR3
1066 speed

I've tried 2x2 gig, 2x1 gig, 1x2, and 1x1, costing me about 150$ in total.. not a single set of ddr3 ram has worked in this configuration. I keep getting the 3 long buzz that = no ram / incompatible ram. Does anyone have a similar setup or some workable ddr3 ram? I'll pay up do $80. Thanks!