Evergreen 586 - Processor upgrade - 1 x AMD 5X86 133 MHz AMD 5x86 133 CPU Upgrade Kit for Socket 486 Motherboards Upgrades a 486 system to a 586/80, 100, 120, or 133 Supports both 168 (169) and 237 (238)-pin CPU and OverDrive socket styles Includes 16K of level one cache Includes high-speed floating point math unit