its obvious that if its pc6400 that its gonna be 800 mhz, but if theres other ddr2 memory that pc6400 that has diff mhz, then by all means, let me know. also ive actually thought bout gettin a full tower case. like i said i dont like the design of the hard drive case (& trust me ive tried changing it, but its bolted into place & am 2 lazy 2 change that) but there r some cases that look interesting 2 me. but i would have 2 say that thats the least of my worries. my main worry is getting another job (that way i can upgrade my psu, its only 460 & would like 2 upgrade it to something that is over 500).