The Intel® Pentium® 4 Processor is designed to deliver performance across usages—such as image processing, video content creation, games and multimedia—where end-users can truly appreciate the performance. With a PC based on the Intel® Pentium® 4 Processor with HT Technology, you get advanced performance and multitasking capabilities for today's digital home and digital office applications.

Intel Pentium 4 Processor Features
Features	Benefits
Versatility, performance and reliability to meet all your computing needs	Everyone wants something different from their computer—work, play, Internet, music, learning and more. A PC featuring the Intel® Pentium® 4 Processor opens the door to many new experiences. It's as versatile as you are.
Greater performance with Hyper-Threading Technology (HT Technology)†	Hyper-threading enables multi-threaded software applications to execute two software threads in parallel, thereby improving system responsiveness. Intel Pentium 4 Processors enabled with HT Technology deliver performance and multitasking gains that result in increased productivity and efficiency.
Improved Power Management with Enhanced Intel SpeedStep® Technology‡	Intel Pentium 4 Processors that are enabled with Enhanced Intel SpeedStep® Technology allow the operating system to adjust the processor clock down when running applications that require less power. Increased power efficiency brings savings.
Scalability and performance with Intel® EM64Tø	Intel® Extended Memory 64 Technology (Intel® EM64T) can improve performance by allowing the system to address more than 4 GB of both virtual and physical memory. Intel EM64T also provides support for 64 bit computing to help handle the applications of tomorrow.
Execute Disable Bit° functionality protects your investment	Execute Disable Bit can prevent certain classes of malicious "buffer overflow" attacks when combined with a supporting operating system.

	Architecture	Cache	Clock Speed	Front Side Bus	Intel® Virtualization Technology±	Hyper-Threading Technology†	Enhanced Intel SpeedStep® Technology‡	Intel® EM64T†	Execute Disable Bit°
Intel® Pentium® 4 processor 672 supporting Hyper-Threading Technology	90 nm, LGA775	2MB L2	3.80 GHz	800 MHz	Yes	Yes	Yes	Yes	Yes
Intel® Pentium® 4 processor 670 supporting Hyper-Threading Technology	90 nm, LGA775	2MB L2	3.80 GHz	800 MHz	x	Yes	Yes	Yes	Yes
Intel® Pentium® 4 processor 662 supporting Hyper-Threading Technology	90 nm, LGA775	2MB L2	3.60 GHz	800 MHz	Yes	Yes	Yes	Yes	Yes
Intel® Pentium® 4 processor 661 supporting Hyper-Threading Technology	65 nm, LGA775	2MB L2	3.60 GHz	800 MHz	x	Yes	Yes	Yes	Yes
Intel® Pentium® 4 processor 660 supporting Hyper-Threading Technology	90 nm, LGA775	2MB L2	3.60 GHz	800 MHz	x	Yes	Yes	Yes	Yes
Intel® Pentium® 4 processor 651 supporting Hyper-Threading Technology	65 nm, LGA775	2MB L2	3.40 GHz	800 MHz	x	Yes	Yes	Yes	Yes
Intel® Pentium® 4 processor 650 supporting Hyper-Threading Technology	90 nm, LGA775	2MB L2	3.40 GHz	800 MHz	x	Yes	Yes	Yes	Yes
Intel® Pentium® 4 processor 641 supporting Hyper-Threading Technology	65 nm, LGA775	2MB L2	3.20 GHz	800 MHz	x	Yes	Yes	Yes	Yes
Intel® Pentium® 4 processor 640 supporting Hyper-Threading Technology	90 nm, LGA775	2MB L2	3.20 GHz	800 MHz	x	Yes	Yes	Yes	Yes
Intel® Pentium® 4 processor 631 supporting Hyper-Threading Technology	65 nm, LGA775	2MB L2	3 GHz	800 MHz	x	Yes	Yes	Yes	Yes
Intel® Pentium® 4 processor 630 supporting Hyper-Threading Technology	90 nm, LGA775	2MB L2	3 GHz	800 MHz	x	Yes	Yes	Yes	Yes
Intel® Pentium® 4 processor 571 supporting Hyper-Threading Technology	90 nm, LGA775	1MB L2	3.80 GHz	800 MHz	x	Yes	x	Yes	Yes
Intel® Pentium® 4 processor 570J° supporting Hyper-Threading Technology	90 nm, LGA775	1MB L2	3.80 GHz	800 MHz	x	Yes	x	x	Yes
Intel® Pentium® 4 processor 561 supporting Hyper-Threading Technology	90 nm, LGA775	1MB L2	3.60 GHz	800 MHz	x	Yes	x	Yes	Yes
Intel® Pentium® 4 processor 560J° supporting Hyper-Threading Technology	90 nm, LGA775	1MB L2	3.60 GHz	800 MHz	x	Yes	x	x	Yes
Intel® Pentium® 4 processor 560 supporting Hyper-Threading Technology	90 nm, LGA775	1MB L2	3.60 GHz	800 MHz	x	Yes	x	x	x
Intel® Pentium® 4 processor 551 supporting Hyper-Threading Technology	90 nm, LGA775	1MB L2	3.40 GHz	800 MHz	x	Yes	x	Yes	Yes
Intel® Pentium® 4 processor 550J° supporting Hyper-Threading Technology	90 nm, LGA775	1MB L2	3.40 GHz	800 MHz	x	Yes	x	x	Yes
Intel® Pentium® 4 processor 550 supporting Hyper-Threading Technology	90 nm, LGA775	1MB L2	3.40 GHz	800 MHz	x	Yes	x	x	x
Intel® Pentium® 4 processor 541 supporting Hyper-Threading Technology	90 nm, LGA775	1MB L2	3.20 GHz	800 MHz	x	Yes	x	Yes	Yes
Intel® Pentium® 4 processor 540J° supporting Hyper-Threading Technology	90 nm, LGA775	1MB L2	3.20 GHz	800 MHz	x	Yes	x	x	Yes
Intel® Pentium® 4 processor 540 supporting Hyper-Threading Technology	90 nm, LGA775	1MB L2	3.20 GHz	800 MHz	x	Yes	x	x	x
Intel® Pentium® 4 processor 531 supporting Hyper-Threading Technology	90 nm, LGA775	1MB L2	3 GHz	800 MHz	x	Yes	x	Yes	Yes
Intel® Pentium® 4 processor 530J° supporting Hyper-Threading Technology	90 nm, LGA775	1MB L2	3 GHz	800 MHz	x	Yes	x	x	Yes
Intel® Pentium® 4 processor 530 supporting Hyper-Threading Technology	90 nm, LGA775	1MB L2	3 GHz	800 MHz	x	Yes	x	x	x
Intel® Pentium® 4 processor 521 supporting Hyper-Threading Technology	90 nm, LGA775	1MB L2	2.80 GHz	800 MHz	x	Yes	x	Yes	Yes
Intel® Pentium® 4 processor 520J° supporting Hyper-Threading Technology	90 nm, LGA775	1MB L2	2.80 GHz	800 MHz	x	Yes	x	x	Yes
Intel® Pentium® 4 processor 520 supporting Hyper-Threading Technology	90 nm, LGA775	1MB L2	2.80 GHz	800 MHz	x	Yes	x	x	x
Intel® Pentium® 4 processor 506	90 nm, LGA775	1MB L2	2.66 GHz	533 MHz	x	x	x	Yes	Yes
Intel® Pentium® 4 processor 505J	90 nm, LGA775	1MB L2	2.66 GHz	533 MHz	x	x	x	x	Yes
Intel® Pentium® 4 processor 505	90 nm, LGA775	1MB L2	2.66 GHz	533 MHz	x	x	x	x	x

† Look for systems with the Intel® Pentium® 4 Processor with HT Technology logo which your system vendor has verified utilize Hyper-Threading Technology. Performance will vary depending on the specific hardware and software you use. See www.intel.com/products/ht/hyperthreading_more.htm for information.

‡ Enhanced Intel SpeedStep® Technology for specified units of this processor will be available in the 2nd quarter of 2006. See the Processor Spec Finder at http://processorfinder.intel.com or contact your Intel representative for more information.

ø Intel® EM64T requires a computer system with a processor, chipset, BIOS, operating system, device drivers and applications enabled for Intel EM64T. Processor will not operate (including 32-bit operation) without an Intel EM64T-enabled BIOS. Performance will vary depending on your hardware and software configurations. See www.intel.com/technology/64bitextensions/ for more information including details on which processors support Intel EM64T or consult with your system vendor for more information.

° Enabling Execute Disable Bit functionality requires a PC with a processor with Execute Disable Bit capability and a supporting operating system. Check with your PC manufacturer on whether your system delivers Execute Disable Bit functionality.