page_title: I/O Controller Hub
section_title: ICH4
hierarchical_section_title: I/O Controller Hub / ICH4
caption_attribution_description: English: Intel FW82801DB Български: Intel FW82801DB
context_page_description: I/O Controller Hub is a family of Intel southbridge microchips used to manage data communications between a CPU and a motherboard, specifically Intel chipsets based on the Intel Hub Architecture. It is designed to be paired with a second support chip known as a northbridge. As with any other southbridge, the ICH is used to connect and control peripheral devices.
  As CPU speeds increased data transmission between the CPU and support chipset, the support chipset eventually emerged as a bottleneck between the processor and the motherboard. Accordingly, starting with the Intel 5 Series, a new architecture was used that incorporated some functions of the traditional north and south bridge chips onto the CPU itself, with the remaining functions being consolidated into a single Platform Controller Hub. This replaces the traditional two chip setup.
context_section_description: The ICH4 was Intel's southbridge for the year 2002. The most important innovation was the support of USB 2.0 on all six ports. Sound support was improved and corresponded the newest AC'97 specification, version 2.3. Like the preceding generation, the ICH4 had 421 pins.
  This has the following variants:
  82801DB (ICH4) Base
  82801DBM (ICH4-M) Base Mobile
caption: ICH4
exif: {"Image Make": "Canon", "Image Model": "Canon EOS 400D DIGITAL", "Image Orientation": "Horizontal (normal)", "Image XResolution": "350", "Image YResolution": "350", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "Digital Photo Professional", "Image DateTime": "2009:12:19 13:19:14", "Image YCbCrPositioning": "Centered", "Image ExifOffset": "136", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail XResolution": "72", "Thumbnail YResolution": "72", "Thumbnail ResolutionUnit": "Pixels/Inch", "Thumbnail JPEGInterchangeFormat": "1004", "Thumbnail JPEGInterchangeFormatLength": "10671", "EXIF ExposureTime": "1/6", "EXIF FNumber": "28/5", "EXIF ExposureProgram": "Program Normal", "EXIF ISOSpeedRatings": "400", "EXIF ExifVersion": "0221", "EXIF DateTimeOriginal": "2009:12:19 13:19:14", "EXIF DateTimeDigitized": "2009:12:19 13:19:14", "EXIF ComponentsConfiguration": "YCbCr", "EXIF ShutterSpeedValue": "2647/1024", "EXIF ApertureValue": "162885/32768", "EXIF ExposureBiasValue": "-2/3", "EXIF Flash": "Flash did not fire, compulsory flash mode", "EXIF FocalLength": "135", "EXIF FlashPixVersion": "0100", "EXIF ColorSpace": "sRGB", "EXIF ExifImageWidth": "1596", "EXIF ExifImageLength": "1500", "EXIF FocalPlaneXResolution": "3888000/877", "EXIF FocalPlaneYResolution": "432000/97", "EXIF FocalPlaneResolutionUnit": "2", "EXIF CustomRendered": "Normal", "EXIF ExposureMode": "Auto Exposure", "EXIF WhiteBalance": "Auto", "EXIF SceneCaptureType": "Standard"}