Your system should be able to handle hybrid ubershaders, or "Ubershaders (Asynchronous)" on latest builds. "Ubershaders (Synchronous)" will be far too much for your GPU.
Also, check that your internal resolution settings are reasonable. I would guess your GPU can't push more than 3x in Dolphin without lagging in some games. and Metroid is a great GPU stresser.
Also, check that your internal resolution settings are reasonable. I would guess your GPU can't push more than 3x in Dolphin without lagging in some games. and Metroid is a great GPU stresser.