To achieve 4x33 on a Shuttle HOT-433, you need a 4x-capable Cyrix 5x86 CPU, in which case, you'd set the motherboard with the 2x jumper. 4x-capable Cyrix 5x86 CPUs are difficult to come by. Finding a 4x-capable CPU which runs reliably at 133 MHz is rare indeed.
To achieve 2x66, you need a Cyrix 5x86 or preferably an IBM 5x86c capable of running reliably at 133 MHz. Set the FSB to 66 MHz. I beleive it is:
JP1: 1-2
JP2: 2-3
JP3: 1-2
CLKMUL to 2x. I beleive it is JP18: 2-3
Set the voltage to 3.6 V, JP9: 5-6.
If that fails, try 4.0 V, JP9: 7-8.
I have only been to run an IBM 5x86c at 133 MHz in a stable configuration on an MB-8433UUD at 3.75 V. L2 cache needs to be set at 3-2-2 and memory read wait at 2 WS. Set the PCI divisor at 1/2. From my tests, the HOT-433, M919, PKM-0033S, and 4DPS can only handle up to a 60 MHz FSB reliably.
Good luck.
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