Topic: S3+ Bitmain Miner Power Arrangement - page 2. (Read 5407 times)

Agreed

You must have some mighty efficient S3's, here's what my Overclocked S3+'s consumed AT THE POWER SUPPLY.  
237.5M will use about 385w
250M will use about 410w
So no, when Overclocked they do not fall within specs.

Two other reviews online I read had similar results.

Bitmain S3+ Power Cable Layout
Just drawn the below using ultra sophisticated...paint   I assume this layout would be best of both worlds and best usage of all VGA slots



http://www.ebay.co.uk/itm/EVGA-PCI-Express-6-Pin-to-8-Pin-Graphics-Card-Power-Adapter-Cable-2x-6pin-to-8-/251678823374?pt=UK_Computing_Sound_Vision_Power_Cables_Connectors&hash=item3a993a13ce

Yes, you're definitely missing something.

On your first link you say:
Legend:  Tambient/Tdevice/Wattage/Hash Rate

@ 218.75M (stock)
35C/45C/365W/440GHs

@ 225M
35C/45C/378W/453GHs

@ 237.5M
32C/43/400W/478GHs

@ 250M
29C/43C/425W/485GHs

But then you say on this post "S3 oc'd to 250M requires around 360WDC from a PSU"

Or am I miss reading something?

At an ambient room temperature of 29C (84F), an S3 oc'd to 250M requires around 360WDC from a PSU; 180WDC per blade.  Therefore, one power input per S3 blade is still within the 192W max capacity spec of a 6-pin PCIe power harness (Mini-Fit Jr. power connector with 18-gauge wires).  I have oc'd my units to 250M (though I have been keeping them at 243.75M since it seems to be the sweet spot) using Corsair CX500 PSUs (only two PCIe power connections) with no issues whatsoever and the PCIe power cables/connectors are barely warm to the touch.  They've been continuously hashing for almost three months now.  Do not take my word for it though; go with the figures I provided above.

...and I do have pictures:  

https://bitcointalksearch.org/topic/m.8227268
https://bitcointalksearch.org/topic/m.8471571

I believe that each 6-pin connector is rated industry standard at 192watts max., which the S3+ falls under per blade at default speed, but once you start overclocking if falls outside of spec. and that's why it is recommended to connect the 2nd pair of 6-pin connectors if you OverClock.  So don't listen to those that say it's OK, it may be OK for them but it's not designed to do that and if you have the 2nd pair of connectors then just attach them.

If you want a cheap solution go for Dell 750W server psu-s.

They can handle 2 OC-d S3 at 820W. (230V)

2 connections on one S3.

But please don't trust me, I have no pictures. 

OC'ing an S3 to 500GH/s makes them run around 400W. So that is only 200W per plug, again you really only need 2 plug per S3.

If noise is a concern I personally would get the EVGA PSU's. I have 4 of the 1000W PSU's myself. The 10 year warranty is unbeatable.

edit: Link for reference https://bitcointalksearch.org/topic/m.8604862

Great advise about the CPU plug , I was woundering about that. So even with the EVGA PSU im stuck with 6 connections. Would be nice to have a 1000 watt PSU with 8 VGAs  

I do plan on over OC'ing, I really dont see any reason not too.

If there's four slots when I assume its best to use all, I know you say they will be OK with just two OC'd, however BITMAIN must have manufactured them this way for a reason.

The noise could be a concern with a server PSU, im setting this up over at my dads in the loft conversion which is direclty above his bedroom lol (his leccy is cheaper then mine)..  

The Dell 750W PSU's are just as efficient, if not more, than most ATX PSU's. They are loud, so if that is a concern, an ATX PSU is what you should get.

The EVGA PSU you are talking about would be great for 2 S3's over-clocked. You only need 2 PCIe per S3. If you want to use 4, go for it.

DO NOT USE THE CPU PLUG. Only use the red VGA plugs.

Not OC and 220V

OC'd?

At stock clock (225M), 2x S3+ exerts around 85% load on a TX750 at approximately 29C ambient temp; 95% load if OC'd to 243.75M.  If you're comfy with such loading in a continuous, unattended 24/7 operation, then I guess it's fine.

Here's a simple guide that you may consider if you want to stay in specs of the power supply (EVGA seems to be the big name in mining power supplies), look for a single +12v line:  Keep in mind that the closer you are to the 50% power rating, the more efficient the power supply will run (so if you can afford it, get a higher rated power supply over a power supply closer to the peak load, or if there are 2 power supplies in the same price range you'll probably want to get the higher rated power supply, so a 1,300w power supply would be better than a 850w one barring the price factor).

1 S3 if you want to OverClock then you'll want to get a 500-800w power supply.
2 S3's if you want to OverClock then you'll want to get a 850-1600w power supply.
3 S3's if you want to OverClock then you'll want to get a 1,300-1,600w power supply.
4 S3's non-Overclocked then you'll need a 1,600w power supply (and a pair of splitters, better from the 8-pin line).

(and here will come the posters that will chime in how their power supply is working fine out of specs.)


Here's what each S3+ will roughly draw at the power supply (add another approx. 25watts at the wall on 120v line if you want to know the power consumption for cost of electricity evaluation) at given speed.  BitMain's specs. seem to be after the power supply (even though they state at the wall), my testing was done at approx. 91% efficiency on a 1,200w Gold power supply using a pair of S3+'s and then divided by 1/2.

175M will use about 265w
193M will use about 296w
200M will use about 306w
212.5M will use about 330w
218.75M (default S3) will use about 342w
225M (default S3+) will use about 362w
237.5M will use about 385w
250M will use about 410w

Please search for the account ElGabo. (This was my account before it got hacked.)

Serch for the posts.

You'll find pictures how I made some server PSU-s and you can find a few pictures how I modified 2 S2-s with this 2100W server psu-s.

But only if you have some time for it.....

After my old account hacked I promised myself I won't post too much pictures... I think you undertand why.

Please do your research and get back to me after.

Maybe its just me who take pictures of his own hardware  



Think i'm going to get two of the G2-1000-XR EVGA SuperNOVA 1000 G2

I have over 40TH/s running and only  pictures i have from "home made" open air 6 nodules KNC Neptunes.

 however,I have
5x  KNC Neptune
37 x  Antminer S3 and S3+
last 2 Antminer S2
The first and last S4, running with EVGA G2 1300W (downclocked) and wait for PSU
and I do not have any pictures of them.  Did I really should have a picture of my miners ?


I have Corsair TX750 running two S3+

Good luck with your HX850 (with a max output of 840W on its +12V rail) running two OC'd S3s.

I like this guy!

What do you mean "not the best way to go"?  I just gave you proof that you don't need no stinkin' four PCIe power connections to run an overclocked S3 and you don't need an overpriced/overkill PSU either.  I'm not sure why you started a separate thread on this subject in spite of it being discussed till kingdom come on the "ANTMINER S3 Discussion and Support Thread" when you seem to already know what you are doing and what you want.