... r tested befor we sent to u!!! used / tested / good working!!! Used SD Ram 512,used / tested / good working, pc 266,168-pin ... Ram 256, used / tested / good working,pc 133, 16-Chip, 168-Pin DIMM PC memory (will work on all machines that use ... non-ECC memory), system-pull rams, famous brands, functionally active rams, 0ne month Checking warranty, no Korean rams. Used ...