I see problems with the data wires. You cannot connect 2 input signals into the same place since both signals will collide. You'll need a controller to put between the psu and the motherboards that takes care of this (sends a power-off only when all motherboards are off and such things). I don't know if such controller exists, if not you can try to do it fourself with an FPGA or a PIC chip or similars.

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When only one motherboard is powered off, this controller would manage it and cut the power to it while of course maintaining the psu on for the others. Or probably it's not even necesary to really cut the power.

My i ask what trigger you to think of doing this?

I though you was trying to invent somthing

Thank you for your input loser, notice that everyone besides you everyone had something useful to add those this thread, and I suppose all those universities are stupid too, but you say "What a stupid idea verthex." which is something retarded stalker trolls do everywhere I've gone to on the net. Please refrain from replying back to me and thanks for wasting my time.

blargmob, seriously you're just as stupid

blank stare at blargmob's avatar

Anyhow, you can ignore people, right in the control panel on this site. But we're not supposed to talk about who we've ignored - ML has proclaimed that it is grounds for banning.

You could use a set of logic gates to control a single powersupply if needed and run them off the +5VSB (usually purple), but if your powering up to 8 boards then you might be better off with 8 cheaper lower watt powersupplies...

Here is an old schematic I did using logic gates. It can isolate the motherboard signals from each other to control the PSU. Not sure if it works in real life, but it seems to function as intended in simulation.

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[edit] The capacitors are coupling capacitors. There should be on across the power pins of each IC.

The circuit was created using 'TINA'. You can download a free version called TINA-TI from Texas Instruments website.

It basically works when run in a simulation under TINA, but I've never actually built the circuit. It should work though. My only concern was that it mixes TTL and CMOS chips.

The circuit could probably be done in a simpler way. Maybe even just 8 diodes and a pull-up resistor from PS_ON to +5VSB... or maybe even without the pull-up resistor... I think the powersupply would have one internally...

Anyway... I thought about it a long time ago, but never dove in to test anything... Just some ideas

You don't understand network booting, do you? With a network boot, you don't need any drives, just ram.

Get yourself some GPUs and some Core i7s. Or Xeons, preferably 6-8 core xeons. Quad proc mobos would be good too

Ah interesting. So the ignore list doesn't hide posts but it does block people from posting on your thread.

If a child is conceived in the same building as a 4 CPU x 8 core Xeon, will a communist dictator be born? The world may never know...

No it's not. I take it you've never heard of CUDA. If you're looking for quick and cheap box with lots of calculation power, I'd say grab some powerful video cards.