You can try using this:
http://images10.newegg.com/BizIntell...age-Calculator
Note that, the calc doesn't include fans and usb devices and other minor stuff. It's still best to use extreme.outervision.com when it's up.
Most importantly, please take note that
my opinion is NOT an expert opinion, and I can't be responsible if that's not the cause.
It's advisable you get official tech support from MSI, and ask the experts at tomshardware.com, and do more research first. I think you should also be able to find some youtube tutorials on how to properly use your vision control engine to check your card operation 'parameters' when running the problematic games.