Image quality

Have challenges in that image quality (Shaded and draft quality HLR/HLV resolution) by itself reduced to a minimum. It happens at rebuild, opening parts, suppress / unsupress parts > hence no specific cause.
- What causes this, do any else now of thise problem?

What can be done?

Computer:

T5500 E5520

12GB Ram

FX 4800

SolidworksGeneral