hi all, here's mi rig : amd athlon xp 2500 abit nf7-s m/b gecube ati radeon 9600xt 256mb ram 1 x kingston cl3 valueram 256mb (ram slot 3) 1 x corsair cl2.5 valuaselect 512mb (ram slot 1) dual channel 1 x maxtor sata I 80gb 1 x benq cdrw 1 x samsung 52x cdrom here's what happaned : i went to buy 2 x 512mb corsair value select ram sticks this morning. i took out the kingston 256mb ram and put in the 2 sticks of corsair rams. upon booting, it says 512mb.... i thought i did not place in properly, so i took them out and tried again. still no luck. so i took out the old ram (corsair) stick and place the 2 new stick into slot 1 and 2. now, it boot up showing 1gb of ram. so i try adding the "old" corsair stick into the 3rd slot and it still show 1gb. shouldn't i get 1.5gb in all? note : the "old" corsair ram is double sided and the 2 new stick is single sided. i"ve no much knowledge on ram, so i wonder if there's compatibility problem? thanks

I suspect that the unmatched sticks are the source of your problem. This Crucial.com search results page for the ABIT NF7-S shows the applicaple RAM for that board. HTH Bryan

Dual channel mode is a function of the motherboard, not the RAM. If you want to run in dual channel mode, just install the matched pair of 512MB Corsair. If you add a 3rd stick, you're no longer running dual. This space for rent

thanks for all the reply. bryco, both the new (single sided) and old (double sided) worked on the abit's board seperately. so i was thinking if the board doesn't work with both single and double sided ram in it? or faulty ram slot? jam, yuppz, i know that. my main concern is not dual channel...all i wanted is to hv 1.5gb on that board. is it that single and double sided ram doesn't work tohether on that board? thanks