NVIDIA, SiS and VIA Bring on Chipsets for AMD Socket 939

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Manufacturer NVIDIA SiS VIA
Northbridge nForce3 Ultra 755FX K8T800 Pro
CPU Support Athlon 64 & FXSempron Athlon 64 & FXSempron Athlon 64 & FXSempron
Socket Support Socket 754, 939 Socket 754, 939 Socket 754, 939
HyperTransport 800 MHz, 1 GHz 800 MHz, 1 GHz 800 MHz, 1 GHz
Graphics Interface AGP 3.0 / 8X AGP 3.0 / 8X AGP 3.0 / 8X
Architecture Single Chip Two Chip Two Chip
Chip Interconnect - MuTIOL1066 MB/s Ultra V-Link1066 MB/s
Southbridge - SiS964/965 VT8237, VT8251
PCI 6x 32 Bit PCI 2.3 6x 32 Bit PCI 2.3 6x 32 Bit PCI 2.3
Audio AC97 2.17.1-Channel AC97 2.3 AC97 2.3 (VIA Vinyl 6-Channel)PCI Audio (Vinyl 8-Channel)
Network Integrated Gigabit Ethernet+ NVIDIA Firewall MII 100 MBit/s Integrated 100 MbitDedicated VIA Velocity Gigabit
Storage 2x UltraATA/1334x SATA-150 2x UltraATA/1332x SATA-150 2x UltraATA/1332x SATA-150
RAID Support Mode 0, 1, 0+1 RAID 0, 1, JBOD Mode 0, 1, JBOD
USB 8x USB 2.0 8x USB 2.0 8x USB 2.0

The MSI board with VIA chipset would not run at exactly 2,400 MHz, which means we were working at a slightly elevated rate of 2,411 MHz.

To maintain comparable values for all the boards, we increased the clock speed of the NVIDIA and SiS chipsets so that CPU-Z reported the two running at 2,412 MHz. With the memory, we had to do without the ideal timings of CL 2.0-2-2-5 because it didn’t work with the SiS board - the Aquamark crashed several times with this setting. This was not the case with the reference board - SiS certainly didn’t have the extreme Corsair modules available. We decided to use CL2.0-3-2-6, which can now be attained with high-value modules from other manufacturers.

Patrick Schmid
Editor-in-Chief (2005-2006)

Patrick Schmid was the editor-in-chief for Tom's Hardware from 2005 to 2006. He wrote numerous articles on a wide range of hardware topics, including storage, CPUs, and system builds.