Its like people who mistake NO$GBA GBA emulator for NO$GBA DS emulator. In the Situation an emulator will not run because of missing software and Hardware could help with other things like RAM, CPU & Graphic Card Drivers, but it all starts with Oneself and how they choose to change the Problem into a Solution or Solve the Problem. It may not be the emulator that needs to be fast, but the Patience of the User Agent should be stead fast because
All of the Work has already been done by the Inventors of Emulation, Developers of Software, Game Developers, Computer Engineer Technicians, Manufacturers, Retail Stores, Delivery Trucks/Airplanes/Boats, Miners, Plastic Sculptures, etc and all we had to do was Download and Play unless you had to Upgrade/Buy your Hardware.
Also its very sad when you said DDR2 which to me sounds like you got a Desktop which may = Your Not Mobile...unless you have a Flash Drive or DDR2 is also used in Laptops.
Anyways I also came to post this, if the "Blue >>" button is click on it would lead to 2 solutions this one is if the First doesn't help.