I sometimes wonder where all the problems come from with failures to boot initially with different sets of RAM, though.
Since the C2D/C2Q cpu's came out, I've built quite a few different systems.....a few on 965 chipsets, two each on a P35 and an X38 chipset motherboards, and several with nVidia chipsets of differing chipsets. These boards have had DDR2-667 sticks in them, DDR2-800, and DDR2-1000 sticks of varying capacities.....most either 1GB or 2GB. Sticks included generic SuperTalent, PNY Optima, and Corsair 1GB 667; DDR2-800 included Corsair XMS2 and XMS2 DHX 1GB, Buffalo Firestix 1GB, G. Skill 1GB and 2GB (2GB was DDR2-1000), Crucial Ballistix 1GB, and an 8GB set (4 x 2GB) Mushkin Redline DDR2-1000.............and I've never had any set refuse to boot any board I've used.
And I've set up some rather "questionable" boards lately.....mostly the ECS specials from Fry's...and still none has refused to boot with anything I've thrown at them....the latest is the recent Fry's special: the ECS GF7050VT-M GeForce7050/610i mATX motherboard and Intel E4600 cpu combo, paired with the on-sale 2GB kit of Crucial Ballistix DDR2-800 RAM, etc. It booted fine into BIOS and loaded Windows no problem. (Of course, it does help that I bought a huge stack of mATX cases w/power supplies for cheap and a dozen or so 18X DVD burners for $18/ea. from MicroCenter a couple of months ago that were CUSA branded....makes for some very cheap system assemblies.)
I just wonder what brands of memory and motherboards/chipsets seem to be having the problems.....I've yet to hit one, I guess thankfully.