There seems to be a lot of confusion here as to who said what. Let me clear up some misconceptions you have.
1st, in your post dated 1/11/01 10:06, you indicated that I asked the questions about the ABIT K7-raid board and the KT133 chipset. Those questions were not asked by me, but by brianlam and was the first thread posted. My 1st reply to him was on 1/10/00 8:33, where I indicated that the KT133 would only support ATA-66 with the A version of the 686 southbridge chip. If the B version of the 686 southbridge chip is used, then and only then will ATA-100 support be available. I hope we can agree on this much so far.
If you reread the 5 motherboard article I referred to in my post to you dated 1/11/01 9:10, you will see on the first page a yellow colored block that says" KT133 and Socket A with UltraATA/100". Note that it does NOT say KT133A. Also, in the summary box directly to the right, it again refers to the KT133 chipset (not the KT133A), and talks about the 686B and ATA-100 support.
Further down in the article, the KT133A chipset is mentioned as an "upcoming" chipset; this is NOT the chipset that was on the 5 motherboards that were reviewed in the article. Feel free to contact Peter or Uwe, the authors of the article for confirmation on this.
The last info posted by wusy, is 100 percent correct.
The KT133A does include the 686B southbridge chip and thus supports ATA-100, but the big new feature is support for the 133MHZ bus that the new future T-birds or whatever name AMD selects, will require when released sometime in the 1st Q of 2001. The present KT133 chipsets with either an A or B version 686 southbridge will NOT run stable at 133MHZ hence the new KT133A chipset.
Part of the blame for all of this confusion rests with VIA;
when they replaced the A version southbridge chip with the B version, they should not have continued to market the chipset by the same KT133 name. As it stands now, there are motherboards being sold as KT133 that support only ATA66 and others that support ATA100. Below are 2 links to information that will help clear up any more doubts you may have. The first is a review of the MSI K7tpro. Pay close attention to the chipset section where it lists what type of chipset is used and the hard drive modes supported. You will notice that the chipset is listed as a KT133+686B; again, not a KT133A. Many manufacturers are now listing their ATA100 boards this way in order to separate them from the original 686A ATA66 versions.
The second link is the info page for a Soyo K7VTA-B board. This is the board I use in my system, and again the chipset is listed as a KT133+686B with ATA100 support. I hope I've cleared up the confusion surrounding the KT133 chipset once and for all.
Andy
http://www.tweaktown.com/reviews/msi_k7tpro2a/
http://direct.com/mwave/doc/k7vtab.html
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