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VIA's ATA-133 Performance Below Average
(Click here to view the original thread with full colors/images)
Posted by: TotalRecall
A serious design defect in Via chipsets results in boards based on them substantially underforming motherboards with chipsets from Intel, SiS and ALi, a series of tests conducted by tecChannel.de has shown. The problem affects boards using both Intel and AMD chips, and the hit to hard disk performance is sufficient for tecChannel to say: "we can currently not recommend VIA chipsets for professional users who demand high performance from their hard drives and think about setting up RAID configurations."
VIA's chipsets are unable to offer full performance over PCI slots because of an interruption in data bursts. This affects all PCI cards, but is most noticable in SCSI and ATA-133 transfers. ATA-133 has the ability to transfer around 127 megabytes per/sec at maximum (the 133 is 133 x 1000000 bytes, while a megabyte is really 1048576 bytes), but rates of 90 Mbytes per/sec is a maximum for VIA chipsets.
VIA knows of the problem and is supposedly working on a patch. A unofficial patch can be downloaded here. Use this at your own risk. The Register has summary of the testing article at tecChannel.de.
Posted by: Ion Silverbolt
Whatever happened to the good old days when chipsets were stable like the Intel BX. Now they all seem to have somkind of flaw regardless of who makes them.
Posted by: JANNA
i havent had any issues with the intel i815 chipset got maybe 10 puters here at work with it and 2 at home
Posted by: Ion Silverbolt
I was talking about newer chipsets.  DDR/RDR boards in particuliar.
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