I plan to purchase an Intel Core 2 Duo e6750 with the 1333 FSB. Not quite sure on the motherboard but it will be 1333/1066 FSB compatible. I was also looking at the Crucial Ballistix Tracer 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 1066 (PC2 8500) Dual Channel Kit Desktop Memory Model BL2KIT12864AL1065. I don't plan to overclock until after a few months or so if I even choose to, and not by much. Counter-strike source is the only real FPS game I play with the occasional rpg. Main goal is to build an efficient overall pc to last for years to come with due upgrades when necessary.

1.) What Motherboard would work best with the CPU and memory up top?
2.) Will the 1066 ram run smoothly with the 1333 FSB of the processor and motherboard? compatibility wise? if not, does it cause for a huge diff. in performance or any significant slower response times than if i used ddr2-800?
3.) If i buy the intel core 2 duo e6600 with 1066 FSB. will that allow for more efficiency with the 1066 memory?

p.s. I'm really a "noob" you can say and have done research but failed to really grasp the meanings of what i've read so far. Figure I'd just let people tell me what I should do. I appreciate any and all advice.

If you're not overclocking than DDR2-1066 RAM is overkill.

333 Mhz baseline setting on the Front Side Bus = 1333
333x2 (for DDR2) = 667

So at stock speeds, you can run 667 Ram on your 1333 Front Side Bus at a 1:1 ratio with no troubles at all. If you plan on overclocking, though, I would recommend good quality DDR2-800 or better. Just decide where you want to end up and then use the same rule to figure out what speed RAM you need.

Get DDR2 800 and save some dough.

DDR2 800 is really cheap too so there really isn't any point in going slower to save a little bit of cache. Plus you can run 667MHz speeds at tighter timings.

-mcg

Thanks guys. This may have been what I needed to feel comfortably purchasing these 3 main parts. I was just really focusing on what memory from crucial will work best for the Intel core 2 duo e6750 1333 FSB.

I'd recommend E6750, GA-P35-DS3R, and 2 GB of Crucial Ballistix DDR2-800. That RAM is on sale right now at newegg with a big rebate