1) Yes, I got 2 strips to 4GB, but it did not help.
2) One addition: strips to 2GB with frequency 1330, and strap on a 4GB frequency 1600.
So I did a combination of 1- 2GB (1330) / 1- 4GB (1600), a 1- 4GB (1600), 2 4GB (1600), but it did not help.
3) In all cases the laptop on and have the opportunity to go into the BIOS (6/4/8 GB depending on memory showed that strips were), but when booting the operating system had two reactions:
1 - when 2GB + 4GB standing, then the screensaver windows all hang out and appeared on the screen of colored boxes.
2 - when 4GB + 4GB were just eternal Boot.