I had my Sys in my sig running with 2 sets of Crucial Ballistix 2GB (2 x 1GB) DDR2 1066 Dual Channel memory. The first set I received was double sided and the second set was single sided. When I install both sets at 1066 I eventially get crashes. I removed the single sided set and my sys runs stable. I read many bad reviews concerning the later single sided memory. Can somebody please suggest better memory which will run stable on my system? Thank You!