Graphics processors (GPUs) are specialized processors for performing mathematical calculations in the rendering of complex images.
GPUs have tremendously large and fast current transients and require significant bypassing, careful PDN design, and large voltage guard-banding to avoid “blue screens”. High current levels mean a tremendous number of balls and bumps with a complex package substrate design are required for low impedance to and from the die and to avoid electromigration issues. Optimizing power/performance by splitting voltage rails for independent voltage island control proves difficult, if not impossible, due to complex power plane routing and bypassing requirements.
There is a better way by designing GPU systems with Empower integrated voltage regulators (IVR) to eliminate poor power signal integrity, significantly reduce the PDN transmission loss to the GPU die, and reduce the number of package balls required.