A discrete GPU is a GPU that's not on-die with the CPU. A discrete GPU is usually something you stick in a PCIe slot. A GPU on the CPU die, non-discrete, is of

A discrete GPU is a GPU that's not on-die with the CPU. A discrete GPU is usually something you stick in a PCIe slot. A GPU on the CPU die, non-discrete, is often referred to as an "integrated GPU" or "integrated graphics." They're typically not very powerful, though they run common non-gaming applications just fine.