Oficially it will take up to an XP2600+ with the latest bios from ECS.
This is the one it supports all other will run at an incorrect speed:
XP 2600+ T-bred B (L2 256KB) 16.0x133MHz = 2133MHz, WCPUID = 6-8-1, (AXDA2600DKV3C)
You can also use the MP2600 & MP2800, too expensive...All XP-M's work on it.
The Barton 2800+ 266 version will work on it too.
You'll want to get some DDR memory to go with it and an adequate good quality power supply.
Check out the 2 links I provided, tons of info there..
I have a K7S5A pro now and used to have a K7S5A Rev 1.x board.
One thing to look for is to check out the caps on the board, they can be bad in some cases...
See my thread here:http://p199.ezboard.com/fk7s5a...ardf...icID=1654.topic
If you run a Sempron on the K7S5A
Spec'd operation for Sempron 2300 to 2800.
OPN = SDA2800DUT3D | 12.0 x 166 MHz
OPN = SDA2600DUT3D | 11.0 x 166 MHz
OPN = SDA2500DUT3D | 10.5 x 166 MHz
OPN = SDA2400DUT3D | 10.0 x 166 MHz
OPN = SDA2300DUT3D | 9.50 x 166 MHz
OPN = SDA2200DUT3D | 9.00 x 166 MHz
Now if you set the FSB to 133 as supported on the main board...
OPN = SDA2800DUT3D | 12.0 x 133 MHz ~ 1600MHz
OPN = SDA2600DUT3D | 11.0 x 133 MHz ~ 1460MHz
OPN = SDA2500DUT3D | 10.5 x 133 MHz ~ 1397MHz
OPN = SDA2400DUT3D | 10.0 x 133 MHz ~ 1333MHz
OPN = SDA2300DUT3D | 9.50 x 133 MHz ~ 1263MHz
OPN = SDA2200DUT3D | 9.00 x 133 MHz ~ 1197MHz
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