New msi mobo and phenom ll x4 925 cpu freezes up in gaming

Well the temp isn't overly high. Perhaps an unstable overclock?
Is the problem exclusively in that game or with internet apps? It could be that the game has a bug or the network adaptor on the board is bad.
Will the computer freeze up during intensive games that are offline? if it does it could be a graphics problem.
When the game freezes up can you hit ctrl-alt-del and get the OS back?

Those temps are very high for AMD. I'd reseat the CPU fan and make sure its actually spinning when the computer is turned on.

Thats 90 F not C, or so he says.

Did you do a fresh install or just replace the mobo and use the existing install of Windows?

If so, you probably have conflicting drivers and would be best to reinstall Windows.

Its always those details that get me. I should have been an accountant for Enron.

^lol

Yea. If he really means 90F its fine. If it is 90c though then.... well TBH, the CPU should be shutting itself off and the PC should turn off. Most CPUs thermal limit is 70-75c.