Although I thought the Silent Pro line was better, in general CM is not known for quality PSUs. It may not be the problem (you're probably not pulling 300W out of it), but stability issues are often caused by poor quality power.
Does your Windows Event Viewer give any indications as to the cause of the crashing?
Not at all, it crashes down to the desktop and nothing else happens. i haven't had any problems with any other games playing l4d2, hawken, amnesia, half life 2. No problems what so ever on my PSU. Super quiet and reliable thus far.