HyperX saved me on my 8rda+...had some a 512mb pc2700 generic stuff from a local store but that didn't work @ 166mhz so I returned it, bought some mushkin 512mb pc3200 the middle quality one and that wouldn't even get me into windows without causing a reboot took that back and they gave me a free upgrade to the expensive mushkin and yet again didn't get me into windows....so I bought some HyperX pc3000 512mb and am running @ 197mhz cas 2-2-2-4