OK, so I’m building a PC by request for someone in the family. I’ve assembled a Dual Core Pentium, 2.6Ghz, 1GB ram, 250 SATA HD and an LG DVD-everything burner — all in slick micro-ATX case. Total, about $365. So, seeing as I’m the ever-geek – how fast does this thing GO??? So, I’m messing …