Intel 440BX

This is a Intel Northbridge Features Supports the following processors: Intel Mobile Pentium II Intel Mobile Pentium III Front Side Bus (FSB): 66 or 100MHz PC-66 or PC-100 memory (depending on FSB) maximum memory is 320MB, when using a 256MB PC-100 "doublesided" with the 64MB soldered onboard AGP 1x or 2x Intel_82371EB companion SouthBridge CPU Host Bridge (PCI ID: 8086:7190) AGP-PCI Bridge (PCI ID: 8086:7191)

Maximum Memory

Maximum addressable memory for this Northbridge is 1GB (using four 256MB DIMMs).
No ThinkPad has more than 2 DIMM slots, so they are in theory limited to 512MB (with the exception of the 600X, which has an additional 64MB soldered to the systemboard, and can oficially support 64+256+256=576MB). Actual supported memory can be significantly less due to BIOS limits or available DIMM slots.

Linux support

This chipset is supported by recent 2.4 and 2.6 kernels

ThinkPads this chip may be found in

• i Series 1720, i Series 1721
• i Series 1422, i Series 1442, i Series 1482, i Series 1483, i Series 1492
• i Series 1542, i Series 1562, i Series 1592
• 380XD, 380Z
• 385XD
• 390, 390E, 390X
• 560Z
• 570, 570E
• 600, 600E, 600X
• 770E, 770ED, 770X, 770Z
• A20m, A20p, A21m, A21p, A22m, A22p
• T20, T21, T22

External links

Intel 440BX documentation