030/50 Problem

[bon]

I recently installed a Blizzard 030/50 and since then my system freezes all the time! I get messages like: "setpatch failed" copy .... failed" etc.

My system also freezes from time to time so I cannot install any Workbench at all. If I boot with no startup sequence it seems to work bettter, but not perfect.

I tried changing the RAM with another SIMM but no luck! Could it be because of overheating? Any ideas?

[bon]

I am using an external hard disk and cd-rom but they are both powered by en external-as well PSU from a PC tower, so I guess PSU is not the case...