hi ! can someone tell me the meaning, (.13u) and (.18u) the end of AthlonXP 2100+ my mobo,ga7zxe[rev 1x] Gigabyte, it will support C.P.U.'s in (.18u) How can tell which cpu are .13u or .18u. i wish put a bigger c.p.u. in my sons computer, i like to get right , facts GA7ZXE/F8/REV1X MOBO/ AMD DURON 1200 CPU TWO HDD'S 140GIG 80GIG TWO NIC'S APG RADEON 9550 256 MEG TV CARD WIN TV CD RW DVDRW 1.5 GIG MEM PC 133SDRAM 3X512MEGS WINXP [PRO] LEN