Please does C2D have 64 bit abilities , i know that intel stripped off VT from E4300
Pentium 4 -- some are 64-bit and others are not. Just look for EM64T capability or Intel64 in the product description.
all cpu's with 64 bits:-
celeron d 300 series ending in 1, 6 or 7 - ie 346
pentium 4 500 series ending in 1 - ie 521
pentium 4 600 series
pentium d 900 series
core2 duo 4000 series
core2 duo 6000 series
core2 quad series
I've never actually seen anyone use VT, so I consider the E4300 to be better then the E6300; it runs nearly as fast, a bit less expensive, and will overclock smoothly. EM64T is around on all C2D/C2Q processors, though not CS/CD.