RE: DELL precision m4800 freezes/hangs randomly for 5secs or so and recovers.
So I installed :
-All chipset drivers
-Mouse and keyboard if you are not using any fancy mouse or keyboard
-AMD drivers from AMD web ,manually don't let software detect your card .pick manually
-Don't install inte power management software
And I think that's all, there's allot ou unnecessary stuff which may have/ or not influence on performance.
Hope that will help you to solve the problem .