Intel 440BX vs VIA Apollo Pro Chipset Comparison
by Anand Lal Shimpi on August 17, 1998 12:57 PM EST- Posted in
- CPUs
Common Name | Intel 440BX AGPSet | VIA Apollo Pro Chipset | |
Chipset Packaging | Number of chips | 1 (82443BX) | 1 (VT82C691 North Bridge) |
Packaging Type | 1 x 492-pin BGA | 1 x 492-pin BGA | |
CPU Support | Number of CPUs | 2 (SMP) | 1 |
AMD CPUs Supported | N/A | N/A | |
Cyrix CPUs Supported | N/A | N/A | |
Intel CPUs Supported | Pentium II | Pentium II, Pentium Pro | |
Cache | Type | N/A on chip | N/A on chip |
Maximum Supported Size | N/A on chip | N/A on chip | |
Maximum Cacheable DRAM Area | N/A on chip | N/A on chip | |
Memory | Maximum DRAM Supported | 512MB (SDRAM); 1024MB (EDO) | 1GB |
BEDO DRAM Read Timings (100MHz) | N/A | N/A | |
EDO DRAM Read Timings (100MHz) | X-2-2-2 | X-2-2-2 | |
FPM DRAM Read Timings (100MHz) | N/A | X-4-4-4 | |
SDRAM Read Timings (100MHz) | X-1-1-1 | X-1-1-1 | |
Data Path to Memory | 64-bits | 64-bits | |
ECC Support | Yes | Yes | |
Hard Disk Controller | Chip | PIIX4 (82371AB Controller) | VT82C596 South Bridge |
Bus Mastering Support | Yes | Yes | |
UltraDMA Support | Yes | Yes | |
Max. Theoretical Transfer Rate | PIO Mode 5/DMA Mode 3 (33.3MB/S) | PIO Mode 5/DMA Mode 3 (33.3MB/S) | |
PCI Interface | Supported PCI Bus Speeds | 30, 33 MHz | 30, 33 MHz |
Async. PCI Bus Speed | No | No | |
PCI Specification | 2.1 (66 MHz max.) | 2.1 (66 MHz max.) | |
Power Management | PC97 Compliance | Yes | Yes |
Suspend to Disk | Yes | Yes | |
HDD Power Down | Yes | Yes | |
Modem Wakeup | Yes | Yes | |
System Suspend | Yes | Yes | |
Video | AGP Support | Yes (66/133) | Yes (66/133) |
Unified Memory Architecture | No | No | |
Peripheral Support | USB Support | Yes | Yes |
Plug and Play Port | Yes | Yes | |
Officially Supported Bus Speeds | 66, 100 MHz | 66, 100 MHz | |
Unofficially Achieved Bus Speeds | 112, 124, 133 MHz | 112, 124, 133 MHz |
Notice any similarities? You should, the two chipsets are virtually identical in terms of features that are normally used for comparison. They both officially support the 100MHz Front Side Bus frequency, as well as other novelties such as the Accelerated Graphics Port (AGP) and SDRAM. One feature unique to the Apollo Pro is its support for FPM DRAM, which was normally thought impossible with the 100MHz FSB...until now. How can FPM DRAM, originally intended to be run at a 66MHz FSB setting, possibly cope with the 100MHz setting on the Apollo Pro chipset? Easily. By allowing for pseudo-synchronous operation of the memory bus, you can lock the frequency of the memory bus to either the FSB clock (100MHz) or the AGP clock (66MHz) much like you can on Super7 boards based upon the VIA MVP3 chipset. This enables you to re-use older PC66 SDRAM or even EDO DRAM that you have laying around, although most mainboard manufacturers will opt to go for the presence of DIMM slots exclusively on their boards, you can still use older EDO DIMMs if you happen to have them. This can decrease system cost considerably if you don't have to purchase faster SDRAM to make use of the higher FSB settings. This also brings the 112, 124, and 133MHz FSB settings within your reach even if you don't have the highest quality SDRAM.
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