The Intel® Pentium® 4 processor supporting Hyper-Threading Technology² gives you the freedom to multitask.
| Processor Number¹ |
Architecture | Cache | Clock Speed |
Front Side Bus |
Intel® Hyper-Threading Technology² |
Enhanced Intel SpeedStep® Technology³ |
Intel® 64Ω |
Execute Disable Bit° |
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| 670 | 90 nm | 2 MB L2 | 3.80 GHz | 800 MHz |  |
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| 661 | 65 nm | 2 MB L2 | 3.60 GHz | 800 MHz | |
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| 660 | 90 nm | 2 MB L2 | 3.60 GHz | 800 MHz | |
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| 651 | 65 nm | 2 MB L2 | 3.40 GHz | 800 MHz | |
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| 650 | 90 nm | 2 MB L2 | 3.40 GHz | 800 MHz | |
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| 641 | 65 nm | 2 MB L2 | 3.20 GHz | 800 MHz | |
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| 640 | 90 nm | 2 MB L2 | 3.20 GHz | 800 MHz | |
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| 631 | 65 nm | 2 MB L2 | 3 GHz | 800 MHz | |
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| 630 | 90 nm | 2 MB L2 | 3 GHz | 800 MHz | |
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| 551 | 90 nm | 1 MB L2 | 3.40 GHz | 800 MHz | |
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| 541 | 90 nm | 1 MB L2 | 3.20 GHz | 800 MHz | |
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| 531 | 90 nm | 1 MB L2 | 3 GHz | 800 MHz | |
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| 524 | 90 nm | 1 MB L2 | 3.06 GHz | 533 MHz | |
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| 521 | 90 nm | 1 MB L2 | 2.80 GHz | 800 MHz | |
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¹ Intel® processor numbers are not a measure of performance. Processor numbers differentiate features within each processor family, not across different processor families. See www.intel.com/products/processor_number/ for details.
² Intel® Hyper-Threading Technology (Intel® HT Technology) requires a computer system with an Intel® Processor supporting Intel HT Technology and an Intel HT Technology enabled chipset, BIOS, and operating system. Performance will vary depending on the specific hardware and software you use. See www.intel.com/products/ht/hyperthreading_more.htm for more information including details on which processors support Intel HT Technology.
³ Not all specified units of this processor support Enhanced Intel SpeedStep® Technology. See the Processor Spec Finder at processorfinder.intel.com or contact your Intel representative for more information.
Ω 64-bit computing on Intel® architecture requires a computer system with a processor, chipset, BIOS, operating system, device drivers, and applications enabled for Intel® 64 architecture. Processors will not operate (including 32-bit operation) without an Intel 64 architecture-enabled BIOS. Performance will vary depending on your hardware and software configurations. 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.
