Generic block diagram of a GPU as found on modern graphics cards. The Wikipedia contains separate articles to many of the depicted components and used communication protocols.BIF: ISA (Industry Standard Architecture), VLB (VESA Local Bus), PCI (Peripheral Component Interconnec), AGP (Accelerated Graphics Port), PCIe
GMC: WRAM, GDDR SDRAM, HBM (High Bandwidth Memory)
DIF: EDID =  en:Extended Display Identification Data, LVDS = en:Low-voltage differential signaling, TMDS = en:Transition-minimized differential signaling
VGABIOS cf. Video BIOS
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Own work
ScotXW