What CPU's can work with this board, Rise R-625?

[schultzz]

I am wondering what the fastest CPU could be installed in this unit, without overclocking. It's the Rise R-625, as listed here:

<a href="http://www.rise.com.tw/main/nr625.htm" target="_blank">http://www.rise.com.tw/main/nr625.htm</a>

The manual for the board is here:

<a href="http://www.rise.com.tw/jumpup/r625.pdf" target="_blank">http://www.rise.com.tw/jumpup/r625.pdf</a>

It's currently running with a Celeron 300A, and the manual says it's designed to work with Intel Pentium II's with 66MHz bus. The motherboard has a Slot 1 connection. The manual lists the following jumper settings:

CPU Type Selector -
3.5X, 4.0X, 4.5X, 5.0X

Bus Clock Selector -
66, 75, 83

Bus Ratio Select -
3.0x, 3.5x, 4.0x, 4.5x, 5.0x, 5.5x, 6.0x, 6.5x, 7.0x, 7.5x, 8.0x.

Actually, I believe the "CPU Type Selector" is exactly the same switch as the "Bus Ratio Select", so I'm assuming you could go with a much faster CPU. Am I correct? Anyone know what Intel CPU's can be used in this unit? What's the fastest you could push this? Is there any possibility of using a PPGA chip in an adapter with this board? Would there be any advantage to that?

[Budster64]

Considering PPGA's need 133MHz FSB I don't see how you can get one to work even with an adaptor. And most PentII's past 400MHz need at least 100 MHz FSB so that's not viable either. The best you can do is find a 333Mhz and over-clock it as much as possible.
But that's about it as far as I can see.

[schultzz]

OK - I've not delved into this before, so I have another question...

You can't run an Intel CPU designed for a 100MHz FSB in a board that only supports a 66MHz FSB? Is that correct? I was hoping as long as the voltages were OK you could use the faster CPU's...

Mark

[Silverman]

You could probably run a 500 MHZ PPGA socket 370 type CPU in an adapter, the FCPGA runs at a different voltage even if its a celeron. The PPGA 500 at 66*8 would be multiplier locked unless you can find a rare engineering sample somewhere. Even then the Bios may have to be updated for the CPU to be properly recognised at the correct MHZ.

[Joker1]

much of the available info on your board is likely out of date. I recommend updateign the bios and booting it with its current cpu to see what options are available. From there you can tell what it can support. (probably cel 533)

[Fubarian]

bah. forget trying to work around it - just get a mid ranged mobo

the link you gave for the motherboard - ugh...scary...

for s and g's, why do you even want to bother with that thing?!