I just bought A-Data 2x2GB PC2-8500 ram , and put it into my Gigabyte GA-EP45-DS3L , and it didnt post or beep , so I took the battery out and reset the bios , it beeped but didnt post , I couldnt even get into the BIOS, so I put back my OCZ Reaper 2x1GB kit , at the start the posting went funny , after it showed up a screen of BIOS Check sum error and asked me to load previous best setting , and now its working again.... know any idea ??