Hello all. Long time lurker but just decided to register. I have a DM1-4050US (with bios F.13) and took the chance purchasing and installing a single 8GB RAM module, I can report it works perfectly in every way, shape and form. Passed Memtest with flying colours with a reported speed of DDR3-1330 and timings at 6-6-6-20. The module is by Corsair, model CMSO8GX3M1A1333C9, I bought it for just under CAD$50 plus taxes. My apologies if this has already been covered somewhere in the previous 399 pages, but if not, I hope it helps someone on the fence about upgrading their RAM capacity in the single-slot Intel version Edit: Cpu-z reports timings of 9-9-9-24 which is what's on the packaging, no idea what's going on with memtest but it's working in any case.