Quarter-inch quick-connects will fit on the blades, but be careful and make sure they stay in place. Might even wad some hot glue on them. The things to watch for are the centermost blades shorting against each other, and one lead popping off and putting an extra current strain on the remaining wires. Also make darn sure you wire things up with the right polarity.

If I eyeball that feller right, it looks to be almost but not quite a compatible connector. The blade spacing is 0.25", instead of the 0.2" on the Dell Z750P this board is designed to work with. It is possible to jerryrig that supply without an external board, and there's pinout information linked to in this thread that would be a start.

I considered a DIY kit, but there is a fair bit going on (thru-hole parts, and surface mount on both sides), it'd only save about five bucks, and I like being able to test stuff before sending it out, so if we do it won't be until we get some kinks worked out with manufacture and streamlining.

I don't really think it works like that. For the power rating on a fixed resistance (like a screw terminal lead would be), amps is amps no matter the voltage.

They're made for 10 and 12AWG wire, 20 amp rated. We've got the underside beefed with copper for current handling. Didn't seem to have any issues pushing 60A through them yesterday.

We've still got to iron out the assembly time and associated labor cost, but we're looking at between $35 and $42.50 depending on quantity.

Availability will depend on how long it takes to manufacture, but we're looking at stocking 18" 16AWG cables, spade on one end and PCIe 6-pin on the other. Hopefully no more than $4 per cable.

http://www.gekkoscience.com/products/server_supply_breakout_board.html

The fans in these guys are pretty loud when left on full. These boards have a knob for manual speed adjustment, and the option for driving the fan from an external signal so you can rig up a load-based or thermostatic speed control. I haven't tried it, but in theory you could hook the external fan pin directly to the current sense pin, since high-speed for the fan would correspond with the 60A mark. Unfortunately the fan speed is not linear with voltage; it'll be at fairly low speed until you hit about 50A, which would still only be dissipating about 60W inside the supply so it might be okay. Wouldn't be very hard to rig up a simple op-amp circuit to scale the current measurement into an approximately linear fan speed signal.

I've also got parts on hand to start prototyping DPS-800 and DPS-2000 boards, so designs for those will be forthcoming. They should have compatible headers so hardware that works for one model's interface board should work with another, but that doesn't mean I recommend mixing and matching supplies in a single bank.
Right now the main effort will be in manufacture of the first batch of these boards. We're also planning on developing a control board which can be linked to several (not sure, 6 to 12 probably) boards and handle them all together, with individual supply health indicators and power readings, as well as composite power output data. The backplane guys will probably like that.

Three of these Z750P load-linked will supply about 2200W and they're rated for 240V input. Just saying. Two of the DPS-800 would supply 2000W off 240V, and have internal fans.

Update - most of the parts to build a few hundred of the Z750P boards came in today. We assembled a few for initial testing; all the signal pins work as expected, as well as the 3.3V and 5V power outputs. I used a couple Cubes as test loads, one of which had some customized cards that pulled more power than usual.

Here's the finished product, hooked up to two Cubes. The pigtail leads on the right are for the current sense signal.



These two Cubes, one running at high clock and the other at even higher clock, collectively pulled about 101% power from a single supply. The current sense signal ranges 0-1.8V for 0-60A (the supplies are rated for 62.4A) so 1.887V equates 62.9A or 101% power. The tolerance on this measurement is about 5%. It ran at this level standalone for at least 15 minutes with no issues while I set up the next test.



Here we demonstrate the load-balancing capability of these supply boards. The 12V busses are tied together, and current-share pins are linked on the header. One supply is sourcing 42.3A, the other 37A; the percent difference from mean current (39.7A) on each supply is about 6.5% in this configuration. Without the current share pins tied, one supply gave 46.3A and the other 33A, a difference from the mean of 17%.



For this test we tied one supply's External On pin to the other supply's 5V output. The 5V is powered off the 12V rail, so it comes on with the main 12V power. Flipping on the main power on this supply automatically powered on the second supply as soon as its 5V was brought up, which was so immediate that I didn't notice a delay and the two supplies came on as one. The EON signal works reliably off 3.3V signals as well. I haven't tested below this voltage but the signal is rated for 3.3-12V without issue. The 5V supply should source 2A comfortably.

These two boards have been running, averaging a 64% load, with zero problems for over four hours now.

We're not taking orders yet, need to build up stock and get bobsag3 taken care of (since he paid down on an order, to get this project rolling he gets first dibs) but possibly sometime next week we'll have some stock to start selling.

Tin whiskers? Yeah none of my products will be RoHS compliant until they figure out how to make lead-free solder that actually works. Lead-free pretty much sucks for anything you want to actually keep working very long.

Regarding collision issues, that's likely a lot of the issue with all-X boards is a single chip hosing up the shared IO lines. I've brought a few back to life that all-X'd with only one bad chip. Just sucks finding the bad one, I don't have a better method than guess-and-check unless something is obviously wrong.

Just spent about half an hour at my local USBank to withdraw some money, most of which came from a CoinBase deposit. I was told that if I made too many more deposits from there, they would probably close my account. For my protection, apparently - something to do with transaction reversals. The bank manager probably didn't understand that bitcoin transactions aren't reversible, and that the exchange is basically buying and selling as a commodity so as long as their dollars aren't recalled (which is a risk with any deposit from any source ever, and accounted for in the process) the deposit is just as guaranteed as anything else. Not too happy about that.

Hopefully the other, local bank where my business accounts are will be a little more polite about it.

I'm probably gonna use this guy since it's a right-angle connector.

Probably going to put a pair of three-pin headers on the board, with a PWM speed adjust tied to both fans. As with the Z750 board, this'll have both manual control, and auto control from an external signal pin so you can implement temp sensors if you want.

Yep, that's the connector I have spec'd to prototype with.

I've got a couple on order should arrive next week, and will be gathering parts to prototype over the weekend. Probably nothing going out before the end of the month, but three or four weeks might see a production run. Takes a while to get all the various ducks in a row.

Isn't that the DPS-2000BB? I have a couple on the way for experimenting with, and am planning on building a board for this one.

Oh don't worry, I will.

We're gonna talk over the timing for the next few weeks, likely gonna be placing a somewhat large order with the factory for those connectors for later rounds of manufacture. Should have DPS800 boards within 3 or 4 weeks, and probably 2000W boards about the same time.

Which I was figuring on integrating a fan header and speed controller on the board so you could plug one in. Anyone got a recommendation for a 2KW with internal fan and pretty standard connector? What's the difference between the DPS2000 and the DPS2500 that guy mentioned a few posts back?

Is it the same pinout, or the same connector? Same connector would make things super easy, slightly easier than just same pinout. The DPS2000 is my current front-runner for a multi-KW supply to work with.

Not sure yet. I'll see what the community's favorite bigarse supply is before deciding - as well as factors like cost/availability of connector, available pinout information etc.

PCBs have been ordered, parts are all spec'd and orders are being placed. We're still trying to iron out timelines and delivery estimates; hopefully by the time we're out of parts for the Z750 boards we're starting to make the DPS800 boards so there's not a lot of time lost between orders.