Thanks to all who have contributed to this thread. It's helped get my 7750G-9657 6650M running great. Using the modded BOIS posted earlier in this thread, I was able to force the laptop to always use the 6650M.
Here's what I did (copied from an earlier post):
Download the Insyde -> A_A_7750_P5WE0117_UlkMenus_ByCamiloml.exe
From Bios Mods Tools; - [
http://www.bios-mods.com/BIOS]
After flashing go into Bios settings and change the following:
Go into BIOS -> Advanced -> Video Configuration -> Pci Express Graphic -> Always Enable PEG [Enabled]
Go into BIOS -> Advanced -> Video Configuration -> Pci Express Graphic -> PowerXpress Setting [Muxed Fixed Scheme]
Restart
NOTE: My Bios had a different menu structure than what is posted above, but I was able to find both the settings that needed to be changed.
For what it's worth, I first installed the Leshcat UnifL drivers, however I'm not convinced they actually installed, and they certainly didn't improve performance. Driver Fusion wouldn't run and I never could do a full uninstall of the old AMD and Intel drivers. Both were still showing up in the Device Manager. I installed UnifL anyway, but there was no change in performance until I installed the modded bios.
So far the only game I've tested is Far Cry 3 Blood Dragon, and the difference is night and day. Before there were tons of weird graphic anomalies and large parts of the screen with some crazy shading and messed up rendering (no matter what settings I used in the game). It was playable, just not pretty. Now ... WOW, what a difference! All the textures are perfect and crisp; all the movement is smooth and quick.
Novabench GPU test before/after:
Intel (prior to mod): 70-80 fps
6650M (after mod): over 700 fps
Yup.