192-145 IBM PS/2 486SLC2 PROCESSOR UPGRADE FOR PS/2 MODELS 56 SX AND 56 SLC AND MODELS 57 SX, 57 SLC AND M57 SLC The PS/2 (R) 486SLC2 Processor Upgrade (#2310, 32G3606) features the new IBM 486SLC2 microprocessor and enhances all models of the PS/2 Model 56 SX and 56 SLC and Model 57 SX, 57 SLC and M57 SLC systems by providing the capability to upgrade to 486SLC2 technology. Features and Performance Enhancements o Double clock IBM 486SLC2 microprocessor (40MHz internal/20MHz external) o 486SX-compatible Instruction Set o Internal memory cache controller and integrated 16KB cache memory o Improves processor throughput up to 271% for 386SX-20 based systems and up to 99% for 386SLC-20 based systems, depending on the application o Improves processor throughput up to 53% greater than 486SX-20 based systems and up to 20% greater than 486SX-25 based systems, depending on the application o 16-byte wide cache line size o Enhances system performance, particularly compute-intensive applications o Allows upgrade of PS/2 Model 56 SX and 56 SLC and Model 57 SX, 57 SLC and M57 SLC systems o Installs into a Math Co-Processor socket connector o Provides a socket for 80387SX 20MHz, or equivalent Math Co-Processor o 16MB real memory addressability o 64TB (TB = terabytes) virtual memory addressability o Customer installable Planned Availability Date: Fourth Quarter 1992*. (R) Registered trademark of International Business Machines Corporation. * Sale or delivery of the IBM PS/2 486SLC2 Processor Upgrade is subject to FCC approval. MARKETING ACTION REQUIRED