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Thanks much for that advice: KISS principle applied . . . $7.50 shipped and arriving tomorrow. No soldering or wire kluge involved, pair should tuck right in under neath the Optical/Floppy bay or over the video connector? https://www.amazon.com/dp/B09P6D5TMV?ref=ppx_yo2ov_dt_b_fed_asin_title

I LOVE it! But the timeline's way off. Beatles broke up in '69 recording "The End" in August C first appeared in '72 \Killjoy Mode ;)

No need for that. That's exactly what I was thinking in my original post. ;) I have to use an ATX 24pin to 20pin adapter cable for the BG3 and I've got some short 24M-24F cables. The unused pins are 3.3v, 5v,12v and GND. To figure this out, I'm just gonna lop those wire off the 24 pin source...

Might it be as simple as adding resistors to limit the voltage reaching the fans from a 12v feed? I'd imagine that a control board with rheostats might suffice for a controller?

Assuming they're 12v max fans per PWM spec, they won't be full RPM @5v or 3.3v, no? I imagine I could build a hovercraft with a IIsi using these things. They were set up blow straight into this 2U server case thru a full frontal dust filter. I have them blowing out the backside, still sucking...

I've got a case with 3 PWM fans and an incompatible (Beige G3) logic board. I'd like two fans to run off a power level a step below the third in any combination of the three voltages available on an ITX PSU. Does this amount to a simple hotwire kluge or do they need a controller to function?

Yep, PBX, the Bus Transceiver that translates everything on the CPU bus in that series to an '030 slow I/O bus, per the docs. Confuzzled a bit, very tired. TREX is the ASIC on the underside of the card cage PCB of the 1400. One of my long ago obsessions was to transmute that entire subsystem...

Heck, if anybody wants it, shoot me an offer. It'll be a horrible thing to pack up and ship. ;)

To my way of thinking, the Blackbirds are the wrong place to start if you really wanna get there? Baby steps! I think the 1400c CPU Card would be the place to start, it's lower hanging fruit with TREX underneath the connectors on the logic board. Get a newfangled, fancier G3 up and running on a...

I'm thinkin' we need to come up with a new title for what my little info request has become . . . a friggin' 4 page monster.:eek: So much cool stuff coming outta the woodwork! Way over my pay grade, but . . . I've got a SparcStation 2 with FDD on board. If anybody in the U.S. is working...

Nice, thanks much for that info. The little 1U compatible 300w PSU arrives today from Amazon. The 500w PSU arrived from eBay and it's a 9" deep freakin' beast of a thing! Wouldn't even fit nicely in the 4U PEx project.:rolleyes: It's only got ten SATA power connectors aside from Molex aarray.

Interesting, will they go straight from a 24Pin source to a 20Pin adapter cable w/o modification to the adapter? Makes sense, only have room for a single Laptop FDD in the 2UBG3 anyway.

Maybe desolder the FDD connector and hotwire it from the solder side? In doing so, the PC connector could be installed and tested without loss of Mac Floppy connection. Using both would be cool.

MicroSD card sticking out as an ejected floppy from the Mac might be better? Do both, LOL!

Great, is that for a set of three as well? Thanks for the Cache Slot info, getting more and more curious about these machines I had never even wanted to collect.

Looks like a trio of 256MB PC133 would be about $60 on Amazon, something to think about!

Out of curiosity, what the heck is that unimplemented slot next to the Zif socket, an unimplemented Processor slot? If so and installed, might that make a greater range of accelerators compatible?

WOW! Great job there, love it. How many watts is that PSU and what what's the original?

Just noticed these modules have the Parity Chip on board. Did PEx make use of the parity feature?

Ran across this somewhere on the web and couldn't resist saving it: It can't stand on its own, but stomping this thing would be great! Bonus points for printing its mouse held in the left hand. Size the whole thing to the perfect LCD and Pi the snot outta' the PC? Flattening the toe to...