hi, Nope, it's not another typical Dual Channel question. it's a weird one here. spec : amd 2500+ barton 1 x 256mb kingston valueram 1 x 512mb cosair valueram after i do an upgrade with this 512mb cosair ram, i had a pleasant surprise that when the system boot, there was an additinal sentence which reads "DDR Dual Channel Enabled..." how can that be? it doesn't really bothers me. but i just find it strange as i know in order for system to run in dual channel mode, 2 identical (same brand, model) ram stick must be install.

Is the system seeing 768MB of RAM on boot-up?

"i know in order for system to run in dual channel mode, 2 identical (same brand, model) ram stick must be install" That statement isn't necessarily true. While using identical sticks is generally the best way to go, two sticks of similar specs will usually/sometimes work. Where does the 256 stick come into play? Or was it removed & replaced with a 512 stick? Asus A7N8X-X 1800+ @8x210mhz 512mb PC3200 Ti4200/8X 128mb WDC 60GB

OtheHill, yes, it shows "786432k OK". jam, the 256 kingston(cl 3) stick was originally there when i first built this pc. the 512 cosair(cl 2.5) valuaselect stick was an add-on upgrade. so, both sticks are working together on dual channel. next, "While using identical sticks is generally the best way to go, two sticks of similar specs will usually/sometimes work." but both have different amount of ram on it, surely that's not identical. anyway, i would like to know if it's only me or it's actually quite a norm thing to get dual channel with different rams? thanks.