The expensive ram will make tiny difference running your conroe in general applications and gaming and running at default speeds. Its a big waste of money. Your a mug. If you plan to overclock the conroe then all you need is some excellent ddr2 667 that will overclock greatly or some quality ddr2 800. Your best overclock will come running the memory at the speed of the fsb in 1:1 mode so it be a waste of money to buy memory with tight timings. So good quality ddr2 800 at cas5 is ideal. My memory can run at 900 so that ideal for 450 fsb. Great speed. Great price. Plough that money into a better part.