Got this from the Intel Web site...
"Product Highlights
Available in speeds from 233 MHz up to 450 MHz.
Utilizes Intel’s 0.25 micron manufacturing process for increased processor core frequencies and reduced power consumption.
Includes MMX media enhancement technology.
The Pentium(r) II processor at 450 MHz delivers 32% more integer performance (as measured by SPECint95), 30% more multimedia performance (as measured by Norton Media Benchmark), and 35% more floating point performance (as measured by SPECfp95) than the 333 MHz Pentium(r) II processor.
Dual Independent Bus (DIB) architecture increases bandwidth and performance over single-bus processors.
450, 400, and 350 MHz versions improve system bandwidth and performance by increasing the system bus speed from 66 MHz to 100 MHz. The Intel® 440BX AGP set enables the 100 MHz system bus to increase peak processor data transfers to the rest of the system by 50%.
Single Edge Contact (SEC) cartridge packaging technology delivers high-performance processing and bus technology to mainstream systems.
32K (16K/16K) non-blocking, level-one cache provides fast access to heavily used data.
512K unified, non-blocking, level-two cache.
450, 400, and 350 MHz versions support memory cacheability for up to 4GB of addressable memory space.
Enables scalable systems to be expanded to two processors and 64GB of physical memory.
Includes data integrity and reliability features such as Error Correction Code (ECC), Fault Analysis, Recovery, and Functional Redundancy Checking for both system and L2 cache buses. "