page_title: Intel DX4
hierarchical_section_title: Intel DX4
caption_attribution_description: voltage converter for 80486 dx4 processors (5V to 3,3V) Camera data Camera Canon EOS 30D Lens Canon EF 24-70 mm 2.8 L USM Focal length 70 mm Aperture f/19 Exposure time 15 s Sensivity ISO 100 Image Editing Programs Canon Digital Photo Professional
context_page_description: The IntelDX4 is a clock-tripled i486 microprocessor with 16 KB L1 cache. Intel named it DX4 as a consequence of litigation with AMD over trademarks. The product was officially named the IntelDX4, but OEMs continued using the i486 naming convention.
  Intel produced IntelDX4s with two clock speed steppings: A 75 MHz version, and a 100 MHz version. Both chips were released in March 1994. A version of the IntelDX4 featuring write-back cache was released in October 1994. The original write-through versions of the chip are marked with a laser embossed "&E", while the write-back enabled versions are marked "&EW". i486 OverDrive editions of the IntelDX4 had locked multipliers, and therefore can only run at 3× the external clock-speed. The 100 MHz model of the processor had an iCOMP rating of 435, while the 75 MHz processor had a rating of 319. The IntelDX4 was an OEM-only product, but the DX4 Overdrive could be purchased at a retail store.
  The IntelDX4 microprocessor is mostly pin-compatible with the 80486, but requires a lower 3.3 V supply. Normal 80486 and DX2 processors use a 5 V supply; plugging a DX4 into an unmodified socket will destroy it.
context_section_description: The IntelDX4 is a clock-tripled i486 microprocessor with 16 KB L1 cache. Intel named it DX4 (rather than DX3) as a consequence of litigation with AMD over trademarks.  The product was officially named the IntelDX4, but OEMs continued using the i486 naming convention.
  Intel produced IntelDX4s with two clock speed steppings: A 75 MHz version (3× 25 MHz multiplier), and a 100 MHz version (3× 33.3 MHz). Both chips were released in March 1994. A version of the IntelDX4 featuring write-back cache was released in October 1994. The original write-through versions of the chip are marked with a laser embossed "&E", while the write-back enabled versions are marked "&EW". i486 OverDrive editions of the IntelDX4 had locked multipliers, and therefore can only run at 3× the external clock-speed. The 100 MHz model of the processor had an iCOMP rating of 435, while the 75 MHz processor had a rating of 319. The IntelDX4 was an OEM-only product, but the DX4 Overdrive could be purchased at a retail store.
  The IntelDX4 microprocessor is mostly pin-compatible with the 80486, but requires a lower 3.3 V supply.  Normal 80486 and DX2 processors use a 5 V supply; plugging a DX4 into an unmodified socket will destroy it. Motherboards lacking support for the 3.3 V CPUs can sometimes make use of them using a voltage regulator (VRM) that fits between the socket and the CPU.
caption: Voltage converter for DX4 processors (5 V to 3.3 V)
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