Yes, I know it points to the graphics driver, but I have tried this with three different graphics cards/drivers. They all work fine with 2 or 3GB of RAM, but as soon as I put in 4GB, the MSI RX1550 gives me the BSoD. The PNY and Galaxy cards just hang up when starting Windows. No BSoD and just hung indefinitely. While the MSI is an older card with no official Win 7 support, both the PNY and Galaxy cards were brand new with new Win 7 drivers.
So it seems something about adding more memory causes a problem with the graphics driver.