Therefore, I have upgraded with this memory to 8 GB, to be exalted any doubts. In contrast to the motherboard, which runs at 1067 MHz, 1333 MHz chips installed, is obviously not a problem, according to experts.
The installation was easy to perform with a mini screwdriver and a little care and caution. The Mac has rebooted and everything went as normal, only liquid. In particular, the MS Office programs can now start much faster and shoot. The miniatures in iPhoto etc. are now running smoothly. The system allows himself since retrofitting significantly more memory (about 2 GB system, overall utilization often 3-4 GB). This indicates that the installation was worth and the storage requirements of the system can be covered now.
From my side So full recommendation for this MacBook series.