To: Dave B who wrote (35503 ) 12/2/1999 12:27:00 PM From: Don Green Respond to of 93625
FAST FORWARD Chipsets are boss The Toronto Star 12/02/1999 Copyright (c) 1999 The Toronto Star The motherboard's logic chipset - so named because it is usually two or three chips working together - sits between your processor and everything else that happens in your computer. It has a direct effect on: The motherboard's base speed - also called the front-side bus speed - the data pathway connecting the processor to main memory. This determines how fast your processor can be (its internal speed is always a multiple of this front-side bus speed - either 66, 100, or 133MHz). The type of processor that can be used (486, Pentium, Pentium MMX, Pentium II or III, AMD or other). The type, amount, and speed of the memory you can use in the system - SDRAM or RDRAM. The type and data transfer rate of the hard drive(s) - 33 or 66MB/sec. The type and speed of any external secondary cache memory. How the PCI bus communicates with the processor and whether or not that's mediated with memory access. Whether PCI bus is 32 or 64 bits. Whether the system can use one or more than one processor. Whether the system supports Universal Serial Bus (USB), High-Speed Serial Bus (FireWire), Accelerated Graphics Port (AGP - and how fast it can be), Infrared (IrDA), PS/2 mouse and keyboard ports. Advanced power management and remote diagnostics. In short, the chipset is the determining factor for what the motherboard can do and what you may wish to do with it in the future. In today's market, for Slot 1 and Socket 370 motherboards, you'll find several choices: Intel 440BX AGPset remains the most popular for the purposes of providing a wide upgrade path. It allows front-side bus speed switching from 66 to 100MHz, but only supports the UDMA/33 hard drive standard and doesn't support AGP 4X (its main drawbacks). A motherboard such as the Asus P3B-F that came in our test bed can handle a Celeron of any speed, a Pentium II of any speed, or a Pentium III processor at 450, 500, 550, 600, 600E, 650, or 700 MHz. The Abit BX6 is also popular in Canada. Intel 440ZX AGPset. Comes in two distinct flavours. The 440ZX-66 supports only Celeron processors and Pentium II up to 333MHz. A motherboard with this chipset will not be upgradeable to faster Pentium II or III processors. The 440ZX-100 will only handle Pentium II at 350 to 450MHz and the Pentium III processors at up to 700MHz. Provides support for UDMA/66, but not for faster AGP. Intel i810 and i810e. Found on motherboards with integrated graphics controller chips designed for the bottom rung on the price ladder. They allow manufacturers to save money by sharing main system memory with the graphics controller (instead of providing it with its own). It's a cost-saving measure, but it also makes for a slower system. The i810 is limited to a 66MHz front-side bus for Celerons only. The i810e provides either a 100 or 133MHz front-side bus, which means it can handle Pentium III processors at up to 733MHz. Intel i820. The company's newest chipset, released on Nov. 15, after a multi-month delay due to technical problems. The i820 supports all the modern features, but adds AGP 4X, Direct Rambus DRAM, FireWire, and 133MHz front-side bus to the mix. You can't run a Celeron on one of these still rare boards, but you can run all the Pentium III products. VIA. The Taiwanese chipset maker is Intel's main competitor for motherboard chipsets. Although Intel has over 80 per cent of the motherboard chipset market, VIA, Acer Labs (ALi), SiS, and others are in the market too. VIA's Apollo Pro 133A found on some Pentium III boards.