[masklinn]

Sure, but you won't solve excessive ambient radiation by running a stress test on your RAM.

[lisivka]

A small radioactive («hot») dust particle will not change average radiation level a lot, but may cause problems with memory/cpu. Simple cleaning, by blowing dust out, fixes it. Saw that dozen of times, but years ago.

[EdHominem]

Did you use a geiger counter to verify the dust was hot? Would something large enough to cause problems with the ram be large enough to detect?