Yes, gigaflops is an indicator - not more. Megahertz is just a number not telling much since you don't know the rest of the figures. Memory is irrelavant for most kernel under hashcat.
The L750D uses a variety of AMD Llano chips, an APU with integrated GPU. Use a hardware tool and check out which one is installed. The GPU should have around 210-250 GFLOPS.
Then you have to use it in benchmark mode to make it comparible. Just try the -b option. Using wordlists descreases performance. Plug in the power cord and switch the energy scheme to full power.
But it probably will be still slower than your old one.
The L750D uses a variety of AMD Llano chips, an APU with integrated GPU. Use a hardware tool and check out which one is installed. The GPU should have around 210-250 GFLOPS.
Then you have to use it in benchmark mode to make it comparible. Just try the -b option. Using wordlists descreases performance. Plug in the power cord and switch the energy scheme to full power.
But it probably will be still slower than your old one.