take these steps.
1.click on the start button and click on RUN.
2.type msconfig and hit enter.
3.A windows will appear having certain options at the top now select BOOT.INI
4.click on the advanced option and tick the first box increase the memory to max then apply and restart.
tick max memory box acknowleges 16gb go back to double check and states 0 in box. have redone memtests and all sticks pass singlarly but when all 4 are in detects error and when culprit stick is out works ok again