A7V133 is one of the KT133A motherboards that are difficult to get to work with the higher Tbred (XP2100+ and higher).
Make sure you have a Tbred B. I recommend a Tbred B XP2400+. Get BIOS 1010 or higher. Plug in the Tbred and set your motherboard in jumper mode. If it works at default speed (15 x 133) that's great. Otherwise, you'll need one of the workarounds.
The first workaround is selecting multiplier 9X. This remaps to 17x (see remap table below) which would give you a hefty overclock of 2267 Mhz. You'll need a decent HSF.
Unfortunately, a lot of KT133A motherboards have trouble getting FSB to work at 133 mhz with the high multiplier Tbreds. For some reason they get stuck at 100 mhz bus. You would have access to multipliers 15x to 24x. You'd have speeds ranging from 1500 Mhz to 2400 Mhz (assuming your proceeor can overclock that high) but a 100 mhz bus speed is far from ideal.
Some boards have partial access to 133 Mhz FSB but limited. As I mentioned, 9x (17x) often works when no other multiplier will. 13x, 13.5x, and 14x are particularly troublesome. (My "XP2400+" works at default multiplier of 15x on an Epox 8KTA3PRO but no other multipliers work without mods).
To get around both the multiplier and FSB issues there is a final workaround. It involves a small wire mod which is easy to do and worth the effort. See link below. (Look for KF traced the Red Circuit near the middle of the page). Some of it sounds complicated but it's just a matter of connect a couple of socket holes or pins with wires.
<A HREF="http://www.beachlink.com/candjac/Workarounds.htm" target="_new">http://www.beachlink.com/candjac/Workarounds.htm</A>
(The site seems to down at the time of this posting)
If you don't want to be bothered with any of this and just want a simple trouble free upgrade then get a Tbred B (got to be a "B") XP1700+ or XP1800+ or get a Barton XP2500+. All of these will limit your multiplier to 12.5x but will provide easy-to-do, trouble free installation with modest overclocking. Depending on your memory you can overclock to 12.5 * 133 = 1667 Mhz or possibly 12.5 * 140 = 1750 mhz if your PC133 memory will overclock to 140 mhz.
Here are the multiplier remappings for legacy motherboards. They only apply if the processor has a default multiplier of 13x or higher (ie the 8X multiplier bit is enabled).<pre>5x ----> 13x (doesn't work on some mobos)
5.5 ----> 13.5x (same)
6 ----> 14x (same)
6.5 ----> 21x (same)
7 ----> 15x
7.5 ----> 22.5x
8 ----> 16x
8.5 ----> 16.5x
9 ----> 17x
9.5 ----> 18x
10 ----> 23x
10.5 ----> 24x
11 ----> (reserved)
11.5 ----> 19x
12 ----> (reserved)
12.5 ----> 20x</pre><p><b>56K, slow and steady does not win the race on internet!</b><P ID="edit"><FONT SIZE=-1><EM>Edited by phsstpok on 09/20/03 11:47 AM.</EM></FONT></P>
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