Some speculated that the reason was that AMD is cheap, but the real reasons are that competitors lacked the technology.
POWER, ARM, MIPS, or X86?
Power: No apps. Obsolete for the required performance per watt.
MIPS: Not enough developer ecosystem. Not enough horsepower to power the new consoles.
ARM: Not enough horsepower. 64-bit architecture wasn't ready.
Winner: X86
Nvidia, Intel, or AMD?
Nvidia: No X86-based SOC
Intel: No custom SOC. Bad graphics.
Winner: AMD
Now that is why Sony and Microsoft both chose a X86 design from AMD.
http://www.forbes.com/sites/patrick...ns-microsoft-and-sony-chose-amd-for-consoles/
POWER, ARM, MIPS, or X86?
Power: No apps. Obsolete for the required performance per watt.
MIPS: Not enough developer ecosystem. Not enough horsepower to power the new consoles.
ARM: Not enough horsepower. 64-bit architecture wasn't ready.
Winner: X86
Nvidia, Intel, or AMD?
Nvidia: No X86-based SOC
Intel: No custom SOC. Bad graphics.
Winner: AMD
Now that is why Sony and Microsoft both chose a X86 design from AMD.
http://www.forbes.com/sites/patrick...ns-microsoft-and-sony-chose-amd-for-consoles/