Its %90 a bad stick rather than compatibility issue
Memtest is a very good program and it tests only memory
ORTHOS , PRIME95 and OCCT are good programms too but they are used mainly for testing the OverClock of the CPU , but they test the RAM too
But if u only want to test your memory, go for memtest
It has been my rather unpleasant experience that different MBs run substantially different with different memory sets. I have an ASUS that runs fantastic with PQI but crashes with Kingston when both have the same memory configuration and setting.
Moving the Kingston to a Gigabyte board was smooth sailing. After hundreds if not thousands of systems built, I still have the occasional misfit. I realize that you may not have another system to try your memory in, and in such a case, perhaps an RMA is in order.
Go with Maziar the memtest is the best way to go... if you google memtest86+ there will be a downloadable bootcd ... burn and boot off cd and see how it goes... testing both sticks then one then the other.
Memtest86 was originally developed by Chris Brady; Memtest86+ is developed by Samuel Demeulemeester. After several years of a development standstill, both are actively worked on and new versions have been released in January 2007. The bootloading code was originally derived from Linux 1.2.1. Memtest86 is written in C and x86 assembler. The source code is released under the GNU General Public License (GPL). The current version of Memtest86 is v3.3 released on January, 12th 2007 and v1.70 of Memtest86+, released on January, 14th 2007. Both versions now support current dual- and quad-core-CPU's and the corresponding chipsets.