I am going to disagree - the biggest issue with running this setup would be a lack of dual channel capability. Running mismatched ram has rarely actually resulted in instability for me if I'm running a system at stock settings, and that is extending back to DDR1. I would just try it out - it certainly isn't the best configuration, but 2gb is pretty scant these days - hell, chrome will take that much with a few tabs open and flash content running.