Gee on the last case here where the cpu cooked a new pair of 1gb Kingston Value Ram dimms saw some 573 errors when running memtest as well as some 68 errors on the pair of 512mb Corsair xms series DDR400 dimms there. When tested again on the current 939 board that replaced the old Socket A model memtest report 0% errors on both sets! That showed that the old build had some other problems that needed to be solved like replacing a cpu.