HD i3 2100 is a specific version of the Intel HD 2000 Graphics that comes with the CPU 'Core i3-2100 3.1GHz'. It uses the CPU's Level 3 Cache (up to 3 MB, in this case) + part of the RAM installed on the system up to a maximum of approximately 1.7GB for Vista/7 and 1 GB for XP. The Memory controller supports DDR3-1066 and DDR3-1333 and the Dynamic Frequency Technology of the processor can over-clock the graphics card clock from 850MHz to 1100MHz. Nevertheless it's still an integrated GPU with shared memory so its performance is very limited. Still, demanding games like Crysis 2 should still run on the lowest settings.