Added Wintec AMP X 4GB DDR2-800C5 and G.Skill 8GB DDR3-1333C9.
G.Skill kit seems to to run 1333 8-8-8-24 as well as 1600 9-9-9-24 with ~1.50v/1.52v (YMMV).
The AMP X had been on the shelf... But all 4 sticks were just installed and passed Memtest for ~2 hrs. with no errors.