18 Eylül 2007 Salı

Chaintech CT-6VJD VIA Pro266 socket 370

The Chaintech CT-6VJD is the second board we've received for testing that is based on the VIA Pro266 chipset. As a result, the CT-6VJD benefits from the Pro266's main feature: support for DDR-SDRAM. That isn't the only thing that sets this board apart, though. In fact, this is the first motherboard we've ever received that comes not only with the traditional AMR (Audio Modem Riser), or CNR (Communication Network Riser) slot, but also with a slot based on the new ACR (Audio Communication Riser) standard.Let's take a closer look now.

The CT-6VJD, like many boards from Chaintech, is available in two versions. One supports only DDR memory, while the other supports both DDR & PC133 SDRAM. To distinguish between the two, Chaintech has added the suffix /2 to all boards that come with support for conventional memory.Another point of differentiation is that the CT-6VJD comes with an ACR slot, which is meant to take the place of AMR connectors.

Configuration of the Chaintech CT-6VJD is accomplished via a combination of jumpers and BIOS settings. On the board itself, one finds jumpers JP5/JP6, which can be used to force the FSB to operate at a frequency of 66MHz, 100MHz, or 133MHz.Another set of jumpers labeled JP12 can be used to set the CPU's clock multiplier to a value ranging from 3X to 8X.All other adjustments are accessed exclusively from within the BIOS. From within the "Frequency/Voltage Control" menu, for instance, users may:
Set the FSB to operate at between 66Mhz and 170Mhz in steps of 1Mhz.
Set the processor's Vcore voltage to between +0.05vdc and +0.30vdc in steps of 0.05vdc.The rest are accessed from the "Advanced Chipset Features" menu, where users are presented with a series of options in a slightly different fashion than is the norm. Available functions, though, include the ability to adjust memory timing, and adjust the operation of the AGP and/or PCI bus.For example, the "DRAM Clock Drive Control" sub-menu contains the following options:DRAM Clock: Permits the memory bus to be set to operate at the same frequency as the Front Side Bus, a value 33MHz lower than the latter, or simply allow the SPD (Serial Presence Detect) determine the proper frequency automatically.DRAM Timing: Permits the manual selection of memory timings, or else allow the SPD (Serial Presence Detect) determine the proper timings automatically. Manual mode allows users to select a DRAM Cycle Length of 2 or 2.5.Finally, an option is also provided that allows users to set the DRAM Command Rate to a value of either 1 or 2 clock cycles.AGP, and PCI options can also be found within their own sub-menu.

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