1GB Memory Upgrade 4 Toshiba Tecra A4 Series, A4-108, A4-109, A4-111, A4-S111TD, A4-123, A4-127, A4-128, A4-131, A4-158, A4-165, A4-168, A4-170, A4-171, A4-187, A4-203, A4-204, A4-205, A4-212, A4-234, A4-S211, A4-S216, A4-S231, A4-S236, A4-SP211, A4-SP216 (View amazon detail page) Technology: DDR SDRAM Density: 1GB Pin Count: 200-Pin DDR SDRAM Speed: 333MHz, PC2700 CL: CL = 2.5