![Open Box: Intel Pentium 4 521 - Pentium 4 Prescott Single-Core 2.8 GHz LGA 775 84W Processor - CPU-P4521-R - Newegg.com Open Box: Intel Pentium 4 521 - Pentium 4 Prescott Single-Core 2.8 GHz LGA 775 84W Processor - CPU-P4521-R - Newegg.com](https://c1.neweggimages.com/productimage/nb640/19-116-097-02.jpg)
Open Box: Intel Pentium 4 521 - Pentium 4 Prescott Single-Core 2.8 GHz LGA 775 84W Processor - CPU-P4521-R - Newegg.com
![Intel HH80547PG0721MM - 2.80Ghz 800Mhz 1MB Cache LGA775 Intel Pentium 4 521 CPU Processor - CPU Medics Intel HH80547PG0721MM - 2.80Ghz 800Mhz 1MB Cache LGA775 Intel Pentium 4 521 CPU Processor - CPU Medics](https://cdn11.bigcommerce.com/s-qfzamxn9kz/images/stencil/original/products/133057/183409/intel-hh80547pg0721mm-2-80ghz-800mhz-1mb-cache-lga775-intel-pentium-4-521-cpu-processor-22__05061.1534978714.jpg?c=2)
Intel HH80547PG0721MM - 2.80Ghz 800Mhz 1MB Cache LGA775 Intel Pentium 4 521 CPU Processor - CPU Medics
![Intel BX80547PG2800EK - 2.80Ghz 800Mhz 1MB Cache LGA775 Intel Pentium 4 521 CPU Processor - CPU Medics Intel BX80547PG2800EK - 2.80Ghz 800Mhz 1MB Cache LGA775 Intel Pentium 4 521 CPU Processor - CPU Medics](https://cdn11.bigcommerce.com/s-qfzamxn9kz/images/stencil/1280x1280/products/147832/189319/intel-bx80547pg2800ek-2-80ghz-800mhz-1mb-lga775-intel-pentium-4-521-cpu-processor-14__68664.1534978837.jpg?c=2)
Intel BX80547PG2800EK - 2.80Ghz 800Mhz 1MB Cache LGA775 Intel Pentium 4 521 CPU Processor - CPU Medics
![Amazon.com: Intel Pentium P4 521 SL8HX SL8PP SL9CG Desktop CPU Processor 1M 2.8 GHz 800MHz LGA 775 : Electronics Amazon.com: Intel Pentium P4 521 SL8HX SL8PP SL9CG Desktop CPU Processor 1M 2.8 GHz 800MHz LGA 775 : Electronics](https://m.media-amazon.com/images/I/51cRxj89y-L._AC_UF1000,1000_QL80_.jpg)