Well for testing tools i would use:
for HD hdtune--->
http://www.hdtune.com/
for CPU & Memory Prime95--->
http://mersenne.org/gimps/p95v2414.exe
for GPU Rivatuner to check the temps.--->
http://downloads.guru3d.com/download.php?det=163
for the most system temps. speedfan--->
http://www.almico.com/sfdownload.php
Greetings
Gabriel