First 64-bit videogame console

The earliest 64-bit videogame console was Nintendo's Nintendo-64 (popularly known as the N64) console, which was released in 1996. It was part of the fifth generation of consoles. This record has been given to the Jaguar (Atari, 1993), but the Jaguar only used a 64-bit architecture in conjunction with two 32-bit RISC processors and a 16/32-bit Motorola 68000. www.csoon.com/issue15/nu64_1.htm

“There has been a debate over whether the Jaguar is truly a 64-bit system. There are five processors in the Jaguar. Only two of them are actual 64-bit components. One of the microchips the Jaguar uses is a 16-bit Motorolla 68000. However, according to designer John Mathieson, "where the system does not need to be 64-bit, it isn't." Mathieson contends that the Motorolla chip acts as the "manager" of the system. The actual heavy load of work is done by the 64-bit Object Processor which builds the display, and the 64-bit Blitter which controls the 3D rendering and pixel shuffling.” www.allgame.com/platform.php?id=14

“The use of the Motorola 68000 was a reason that the Jaguar's validity as a 64-bit was put to question. You see... the Motorola 68000 is a 16-bit processor and 2 others were 32-bit. Only 2processors were actually 64-bit, but all the registers and buses were in fact 64-bit.” www.videogameconsolelibrary.com/pg90-jaguar.htm#page=reviews

The N64 was the first true 64-bit machine in that all chips were 64-bit.