Please note that the Intel Pentium 4 processor comes in both 478 pin and 775 grid array configurations. Please be sure that you select a processor that is compatible with your motherboard. Opened Retail Box Processors cannot be returned due to compatibility concerns.

The Intel ® Pentium ® 4 processor on 90 nm process in the 775-land package is a follow on to the Pentium 4 processor in the 478-pin package with enhancements to the Intel NetBurst ® microarchitecture. The Pentium 4 processor on 90 nm process in the 775-land package uses Flip-Chip Land Grid Array (FC-LGA4) package technology, and plugs into a 775-land LGA socket, referred to as the LGA775 socket. The Pentium 4 processor in the 775-land package, like its predecessor, the Pentium 4 processor in the 478-pin package, is based on the same Intel 32-bit microarchitecture and maintains the tradition of compatibility with IA-32 software.

Intel processor numbers are not a measure of performance. Processor numbers differentiate features within each processor family, not across different processor families. See http://www.intel.com/products/processor_number for details.