FOR SALE - D750 750W Server PSU Breakout Boards

[firejuan]

I have bothered the crap out of sidehack, but he has been very patient and answered all my questions. Excellent customer service and I am sure his product will be just as good if not better.  Ordered six PSU and board kits tonight.  I can't wait to pair them up with my bitfury boards.

[sidehack]

As for the sale pricing, we're gonna leave the prices where they are for a while - no fixed deadline, just until we feel like changing them. So, you know, buy the stuff because discounts and quality.

[redeyez21]

by 'complete kit' would that just mean everything to get the ants powered and hashing? - might want 3

cheers buddy

[sidehack]

One PSU, one interface board, four cables. Enough for two S1 units. Officially overclocking is not recommended for both ants on a single PSU, but just between you and me these supplies are good for about 20% over rated current so yes it will work just fine.

Shipping is a flat rate for up to 3 kits, so buying 3 gets you the cheapest combined price - right now that's $60 per kit with shipping.

[redeyez21]

Would I just need to get 3 UK PC power cables? I know this is house specific but would I be able to draw enough power from a UK 240v for 6 ants in one room?

[sidehack]

The power supply requires a standard C13/C14 cord. 6 Ants would require about a 10A 240V circuit. If you have that available, you'd be good to go. Also, shipping to the UK is gonna be more than mentioned in the previous post; the $15 flat is for domestic US shipments. Email sales and we'll work something out with you.

[Swimmer63]

Will your full kit power a habanero ?

[Airwhale]

That's what I am wondering,  also.  I've heard that these psu's can actually take about 850w or so,  so it should be able to power one,  particularly at around 650 Ghash.  I don't have a HF clone board to test this yet, though,  but I expect it will.  If not,  I'll just load balance n psus to power n-1 boards.

[sidehack]

https://peppermining.com/hash-rate-power-consumption-and-clock-speed/

I'd have no qualms about pushing one of these supplies to 800W. I noticed on the Habanero page that the DC input at 925MHz was less than 800W, and I doubt most people will be able to push their boards that high. You'd need a couple amps overhead for pump and fans. If you set on 900MHz and take in the expected 730W, that allows you a good 6A left over for peripheral.

Additionally, because the Habanero has independent rails, you can put 4 PSU to 3 boards if you want, without having to worry about wiring up common bus and current-share, and each one should pull less than 600W.

For the record, I'll probably be buying one or two Habaneros in the near future to play with and plan on using these PSUs. I'll likely run two kits tied and balanced for two boards, so I can use the combined overhead for cooling (my watercooling setup is very likely "overkill", the radiator fan is 1200CFM )

[sidehack]

Yep, still selling these. Sale is still going on - 750W/91%eff shipped for $70 or less.

[daddyfatsax]

Can you post a pic of what these should look like when they are tied together for load balancing? I saw the pic on your webpage, but I just wanna make 100% sure when I get my 2 kits I know the correct way to do it. Thanks.

[sidehack]

There's information on the webpage of how to wire them together for loadbalancing. It's pretty straightforward. I think the link is at the bottom of the product page.

[daddyfatsax]

There's information on the webpage of how to wire them together for loadbalancing. It's pretty straightforward. I think the link is at the bottom of the product page.

I understand wiring the 12V and the ground. What kind of wire to I need to run for the common current share line? Just wrap a wire around the 4th pin? Or find a wire to fit on the pin?

[sidehack]

It's pretty much a signal line, so current handling isn't really a consideratin. I've been tagging boards together with about 28AWG. Wire wrap is fine if you can't find any single-pin hanging sockets.

[daddyfatsax]

It's pretty much a signal line, so current handling isn't really a consideratin. I've been tagging boards together with about 28AWG. Wire wrap is fine if you can't find any single-pin hanging sockets.

I appreciate the help. Thanks!

[warrensgun]

Let's say one has several 20A circuits, could you load balance and wire together several of these - spread across multiple circuits?

Also when you load balance the 3 - per the picture - can you put another wire on the 12V terminal that is being shared - ie can you still have 4 PCIe leads out of each board? 

[sidehack]

I doubt there's any issue load-balancing across multiple 20A 120V circuits. The problems with crossing circuits have to do with AC phasing, but the neutral line is common and transformers see to the rest.

As for running 4 leads per board, the thing to be concerned about is where your currents will be going if there's a failure. Say one of your supplies drops out, and the others have to pick up the slack. You don't want more than 20A coming out of any one screw terminal for very long, so if one PSU's terminal has to source 10A of backup current to a down supply *and* more than 10A of current to an attached device, you run into problems. I'd actually recommend jumpering at least two screw terminals per board for a reliable redundant setup, with at least 12AWG (or multiple smaller per) wire.

[sidehack]

We still have plenty of boards and full kits available and the sale pricing is continued. These guys should be idea for powering stuff like the RK-Box. Hard to beat 750-800W at 90+% efficient for $55.

[DebitMe]

Given the details so far about the S3's, should one of these be able to power an S3?

[Swimmer63]

We still have plenty of boards and full kits available and the sale pricing is continued. These guys should be idea for powering stuff like the RK-Box. Hard to beat 750-800W at 90+% efficient for $55.

I have two spares on hand now waiting for whatever looks good hardware-wise.  Will probably order more, but need to solve for A before figuring out B.  The manufacturers continue to mine and we wait.