USED - TESTED WORKING GOOD. Discover the reliability and performance of the Intel® Pentium® 4 processor with a clock speed of 1.50 GHz, coupled with a 256 KB L2 Cache to handle your computing demands efficiently. The processor, designed for Socket 423, is an ideal upgrade for those seeking to enhance their system's capabilities without the need for a complete overhaul. This unit, marked with the model number Pentium 4 SL4TY, boasts a bus speed of 400 MHz, ensuring smooth communication with your system's components. Despite having a single core, it delivers a consistent and capable performance for everyday tasks and is a trusted choice for those looking to maintain compatibility with older systems or embark on a retro computing project.