Success or failure may also depend on whether or not you're overclocking the board. At all stock speeds, I'd say you have a high probability of it working just fine with RAM off the QVL (Qualified Vendor List). If overclocking with "some memory" you might run into issues.
Also, unless you're using a 64-bit operating system, you wont' see more than 3.2GB of RAM anyway. Just FYI.