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NVIDIA has followed its own tradition in naming the Ampere core, using the GA prefix, where A stands for Ampere, and commemorates Andre Marie Ampere who discovered Ampere’s law. After the letter followed by three numbers representing the core level, GA100 is a dedicated core for computing cards, while game cards/professional cards use cores such as GA102 and GA104. Among the first three RTX 30 series graphics cards released, two RTX 3080 and RTX 3090 graphics cards use the GA102 core, which is the largest core in the Nvidia Amp game branch architecture and the most complete Amp game core.
Also, checkout this great review from youtube: GN 3080 Review