System Locks up overnight

[samsc]

fans going on means total system crash or hardware failure.
usually intermittent.

Nothing to do with Catalyst or pixelmad.

recent os builds have not seen this happen so much for me.

i had a broken fan on a graphics card that used to cause this to happen.
heat....

[samsc]

Came up with an idea to check whether its an OS install problem or a hardware problem.

Solution:

Buy a new hard disc.

1. Install totally new system on disc

2. if the computer still crashes - its a hardware fault

3. if the computer doesnt crash - its an os install problem.