I have the Asus M2N-E motherboard with matching duel 512mb sticks of memory. There is a good sale on 1mb sticks at one of the supply houses that is very reasonably priced. Would I defeat the purpose of the duel memory if I add one stick of this memory? If so what would happen?

If you've got 2 512MB sticks, Don't you already have a gig of mem?

I saw from your system info that you had 512MB memory...

In order to run dual channel you must have matching pairs of RAM. However, you would probably benefit more from having an extra Gig of RAM. Michael J

"Would I defeat the purpose of the duel memory if I add one stick of this memory?" Probably, unless the mboard manual says otherwise, which I'm quite certain it doesn't in this case. "If so what would happen?" All the ram runs in single channel mode when you combine a pair of dual channel with a single module (in most cases). Would you be able to perceive the difference? - probably not - there is only an extremely tiny advantage to all your ram running in dual channel mode. If you want all the ram to run in dual channel mode for sure, there isn't much difference in price between a single 1mb module and a matched pair of dual channel (2 512mb), if you shop around, and there will probably be more sales the closer we get to the Xmas season. The most important thing is whatever ram you are thinking of buying, you must make sure it will be compatible with the mboard chipset, and in this case with the AM2 cpu if you are using one which has a memory controller built into it, before you buy it. See response 5 in this for some info about ram compatibilty, and some places where you can find out what will work in your mboard for sure: http://www.computing.net/hardware/w... Correction to that: Mushkin www.mushkin.com ...... E.g. I recently got ram for a M2N-E SLI which has the same ram compatibilty requirements as yours. At the time PNY and Crucial and other brands were on sale, but only Crucial had information that confirmed the specific ram ID string that was on sale would work for sure in that mboard. A tip: You can buy "SLI ready" ram that will work in your mboard that can set the ram frequency to an even value - e.g. 400mhz x 2 - even if your cpu type is normally set to something else (e.g. 64 X2 6000+ actually runs at 377mhz X 2), but the Asus M2N series mboards chipsets don't support that feature. This mboard probably works fine with NVidia chipset video cards, BUT ATI video chipset card's Catalyst drivers cannot work properly with the NVidia drivers for this mboard. ATI knows about the problem but hasn't found a solution yet - it has to do with NVidia doing something non-standard regarding the IDE and SATA drivers. You can load Omega Radeon Drivers instead, available free on the web, which have display drivers and a Control Panel rather than Catalyst and doesn't require a .Net Framework version as the Catalyst software does, but you have to NOT load the NVidia special IDE drivers, which are also required for SATA drives to run in SATA or RAID mode, so if you have a SATA drive it runs in IDE comptible mode - max 133mbps burst speed. Since the person I got this M2N-E SLI for doesn't have much money to spare, instead of getting an NVidia card and a TV tuner card (the ATI card is an AIW - she requires a TV tuner - and I got it for a really good price) I got an Epox EP-AD580XR, which has an AMD chipset and probably will not have any Catalyst software or SATA driver problems (according to my research only the NVidia chipset mboards have this problem), and I will sell the M2N-E SLI mboard after I have transferred all the pieces (I confirmed the ram and cpu will work in the EPOX mboard before I bought it).

"If you've got 2 512MB sticks, Don't you already have a gig of mem?" Yep, I believe your arithmetic is correct: 2x512=1mb I saw from your system info that you had 512MB memory... I have went back and corrected this old info. It should show up on later post. Tubesandwires, thanks for the great info.

I'm glad to have been of help, and to pass on to someone that ATI Catalyst driver / NVidia chipset info I had never heard of before.