Ok, where in gods name did you get a 3400+ 939-pin?????
also IF you want to run hl-2 get a readon 9600 xt or a 6600 gt or non-gt
and get 3200 not 2300 or what ever it is, Now for the monitor If you want a LCd make sure it has less then or equal to 16 m/s response otherwise laggy games and such,
nice monitor PC World rated it best buy and and overall best,
19 inches don't have the m/s response time as 17 inchers do and 17's are as bg as 19 crts so don't worry be happy now dooo doo doo do do dee