Power Computing Motherboard Compatibility with PC Riser and Case

[cobalt60]

I've been looking for a Power Computing "Catalyst Plus" system (PowerCenter Pro, PowerTower) for a while, and ended up finally finding one, but, it's just the motherboard. Here's what I'm talking about if anyone is wondering what I mean by "Catalyst Plus":

Power Computing RAM Specifications

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www.macgurus.com

https://cdn.preterhuman.net/texts/computing/PowerComputing_manuals/PowerSpecificationSheet.pdf

The 2 quotes that I think are most relevant are:
"Catalyst motherboards are certified at a maximum of 50MHz, although testing by PCC has demonstrated reliability up to 60MHz."
"Power Computing has modified and enhanced PowerTower and PowerCenter 166/180 MLBs (the so-called Catalyst Plus) to run at a maximum of 60MHz. Enhancements include ASICs and L2 cache certified reliable beyond 55.33MHz. "

I want to put this board into an actual Power Computing case, but, I am just curious if it is compatible with certain PC cases; thinking LPX form factor.

Has anyone done this?
Is the form factor LPX? If so, is the PowerComputing board fully compatible?
Will a PC LPX riser card work with the PowerComputing motherboard?
If yes to last question, what about an odd LPX riser; one with an ISA slot for example? I realize that ISA cards probably wouldn't work with MacOS, but I am thinking Linux/BSD, or even if just the PCI slots would work in MacOS.
Will a PowerWave Riser (2x PCI, 2x NuBus) possibly work with a PowerCenter?
Will a PowerCenter motherboard fit right into a PowerBase case, and is the backplate easily removable on these systems?
Is the PowerTower Pro an ATX form factor?

I am thinking possibly no one has tried most of this, and if so, I might just get an LPX case to try and see. But if anyone has thoughts on the possibility of damage using a different riser, please share those thoughts.

 

[cobalt60]

Just want to share what minimal info I've found so far. I've compared pictures of various LPX boards, and many or most do match the PowerCenter board. However, many are shorter, sort of like they are "MicroLPX".

Also, want to quote wikipedia:
"There was never any official LPX specification..."
"Due to the lack of standardized specification, riser cards were seldom compatible from one motherboard design to another, much less one manufacturer to another."

 

[absurd_engineering]

I have a riser card on my desk from, I believe, a PowerCenter. Here are photos, if they help.

 

[absurd_engineering]

These are the two loose PowerComputing logic boards I have. One is a PowerCurve board, the other is a PowerCenter Plus. They have the same riser slot, in the same position. (Forgive the dust on the PowerCurve, I recently rescued it from a storage locker).