back4good

Hi everyone! I have a Vidock 4 Plus Overdrive with Quadro 4000. The setup works fine on my Thinkpad X220 (i7 2nd gen, Win 8 Pro 64, 4GB x2 ram, HDD) without any modification. However, when I try the same setup on Thinkpad X230t (i5 3rd gen, Win 8.1 Pro 64, 4GB x 2 ram, msata SSD), it gives me error code 12. Using just 2GB ram works for X230t, but is there sure way that I can use my whole 8GB ram with the setup? I'd really appreciate your inputs!