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A small square Intel Pentium 4 processor in a 775-pin package, silver heat spreader, gold pins on the underside

Intel

Intel SL9CG Pentium 4 521 HT 2.8 GHz 1 MB L2 800 MHz FSB 775-pin Processor Only

SKU CH-VE7X-XXBGK

A 2.8 GHz Pentium 4 521 processor with 1 MB L2 cache and 800 MHz FSB for socket 775 systems

  • 8 GHz clock speed drives responsive single-thread performance
  • Hyper-Threading on the Pentium 4 521 lets one core handle two threads
  • 1 MB L2 cache keeps frequent data close to the execution units
  • 800 MHz front-side bus on a 775-pin socket moves data quickly to the chipset

Intel Pentium 4 521 HT 2.8 GHz 775-Pin Processor

This new Intel Pentium 4 521 HT processor runs at 2.8 GHz with 1 MB L2 cache and an 800 MHz front-side bus. It fits the 775-pin socket and includes Hyper-Threading for dual-thread handling. The unit is sold as the processor only.

Replaces a slower single-core 478-pin

The jump is worth it when a motherboard supports 800 MHz FSB and the LGA 775 package but the current CPU lacks Hyper-Threading or runs below 2.8 GHz. Buyers needing multi-core performance or a different socket cannot use this part.

Highlights

  • 8 GHz clock speed drives responsive single-thread performance
  • Hyper-Threading on the Pentium 4 521 lets one core handle two threads
  • 1 MB L2 cache keeps frequent data close to the execution units
  • 800 MHz front-side bus on a 775-pin socket moves data quickly to the chipset

Specifications

BrandINTEL

Questions about this item

Will the 775-pin package fit my LGA 775 motherboard socket?

The 775-pin package is designed for LGA 775 sockets. Ensure the motherboard supports an 800 MHz front-side bus and the 521 model before installing.

What is the correct orientation step when seating this 775-pin processor?

Align the notches on the 775-pin processor with the socket keys, lower it straight down without force, then close the load lever to secure the 521 model.

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