Looking for DDR3 Memory tester

download zentyal linux based server/router os. they have a 64-bit and 32-bit version for pc. have the ram in the computer u want to test. you dont have to install the the os to the system just put the disc in to boot from. the main menu will have option to install the os, but there are other option such as the memory tester your looking for and disc drive tester.

this the cheapest way i can think of.

if your looking for a actually device to test. check:

http://www.memorytesters.com/

they have a variety of testers. ddr3, ddr2, ddr3 ddr2 combo, ect