Apollo 1230 cpu replacement

[Beowulf]

Howdy

I have an Apollo 1230 accellerator. Im having problems with it, i.e. ram. Im pretty sure the cpu on it is only 16mhz  :-o
The clock rating on the chip has been rubbed off but im sure I can see 16 on the cpu description. I dont why this is so because these boards came out with the lowest cpu rating being 33mhz.
The crystal is 40mhz so if the cpu is at 16mhz im assuming this would cause instability with the card because that is quite an overclock!  
Any way the current cpu is of the QFP package type and the card has an empty PGA socket. So I want to remove the existing QFP 16mhz cpu and install a 40mhz 68030 PGA type in the PGA socket.
Would this work? Or would the PGA socket be disabled some how because the board had a QFP cpu installed?
Anyone know what im talking about?
 :-?  :-o

[Beowulf]

@shoggoth

No, the FPU has a PLLC socket. The PGA socket is next to it.

[Beowulf]

@Tahoe


Yes I do have the MkIII. If I get a 40mhz 68030 and use a 33mhz FPU with a 40mhz crystal would this sycrhonize the CPU and FPU? i.e. keep the CPU at 40mhz and bring the FPU up to 40mhz from 33mhz or would this cause problems?

[Beowulf]

Yes

I tried adjusting the jumpers it might be the ram i have. Im not sure if any of the ram sticks are functioning because I have now way of testing them.

If I get a 40mhz 030 and a 33mhz fpu do I need to change the 40mhz crystal I already have to clock them both at 40mhz?

If i get a 50mhz cpu and fpu do i need a 100mhz crystal?