Spondoolies SP20E. One impressive miner 0,526 W/GH

[Xircom]

This is one serious miner.

I made a trial buy of 6 pcs, before deciding to go with either Bitmain or Spon and what a treat these SP20`s are.
No doubt that running at full speed is never going to make ROI with todays price, but when you downclock these miners to 650 Watt you are able to hit 0.54 G and then its suddenly very interesting.
It has taken me around a week to get them tweaked into perfection, with Wall meassure, Temp meassure and so on. For me sound is not an issue, since they are operating in another building.

As this pic shows, i manged to get 1176 Ghash with 639Watt of usage...impressive 0,539 W/GH





I wanted to run as close as possible to 1200 Ghash and manged to get down to 658Watt = 0,548 W/GH.





Was it possible to get these SP20`s to beat the Bitmain S5.....Almost.... 1156 Ghash at 609Watt = 0,526 W/GH






This testing made my decission quite easy.... Spondoolies SP20E its going to be and 30 More has been ordered.. you have to have in mind that when needed these miners can run 1650 Ghash, so with Spondoolies you have headroom, with Bitmain S5, you are stocked with 5-7% overclock from 1155 Ghash.
I will follow up how things are going with ROI on these miners, but for the moment 7,2-7,4 TH gives me roughly 0,10 -0,11 BTC a day.

Take care All and Happy mining

[Olly_K]

Thanks for sharing, trying your 1.2 th/s settings now .

heat is my enemy at the moment but I just will not put the fans on more than 30 !!!

[Rabinovitch]

5-7% overclock from 1155 Ghash.

>11% (from 1155 to 1300 Gh).

[Xircom]

Interesting, but what is the power usage at the wall at 1300 ghash

[Rabinovitch]

About 680 Wt at the wall, depending on your exact PSU, it's efficiency, 80Plus sertificate and so on.

[DevonMiner]

All of your screenshots show CGMiner up for under 6 minutes, are you getting consistent hash rate after a few hours?

[Xircom]

Yes they are running for days with only very little decrease du to room temp durring day time.

[philipma1957]

Yes they are running for days with only very little decrease du to room temp durring day time.

yeah I prefer the sp20's as they stack nice.

 the s-5's need  fan mods and don't stack nice.

I did manage to get an s-5 to run at freq 412 and use 693 watts giving 1331 gh with .035% errors rate is  99.965% good.  the mods are about 20 in fans and 15 for a fan controller that can run 3 s-5's.  A bit of a wire mess.  So I have 9 sp20s and 1 s-5

[Xian01]

Interesting, but what is the power usage at the wall at 1300 ghash

Close to 750W, off the top of my head.

Running one of mine @ 1300GHs with fans at 20% and she's staying cool.

[Xircom]

My 35 pcs SP20E farm is now running 40.8 TH at Slush. They have been running for a week now and all with down-clocked to 600-650 Watt giving from 1150 to 1212 Ghash and Extreme Stable.
Giving me a 0,55 W/GH and thats pretty nice.

Next step for my SP20E farm will be 1330-1350 Ghash with a wattage pr miner of 811-825 Watt, giving me total 47 TH and 0,60W/GH... if price goes even higher up, third step is going to be
1470-1490 Ghash with a wattage of 1010-1025 Watt = 0,68 W/GH

There is still head room to push them up to 1650 Ghash a pcs total, but much higher Wattage

All 3 steps has been tested and optimized, written down for all 35 miners with WattMeter in the wall.

Finally, some mining Porn :-)

[aclass]

The only bad thing is that if you decide to clock them a bit higher, you will have to get more PSUs

[Xircom]

Yes you are right and its going to be Evga all the way. These PSU keeps amazing me with their ratio in performance.
Tried to run at 700 watt on a 750 watt psu and they are all able to deliver. Question is just for how long😜
Half of my Psu are 1300 Watt Evga Supernova G2 and rest 750 Watt Supernova G2. Tried a lot of other brands, but keep going back to EVGA.

[aclass]

The 1300 G2s can handle 2 SP20s without any issues. We've run them up to 1400W constantly at the wall back in the GPU days. Just make sure it's not too hot in the room and it's all good to go.

[Prelude]

The 1300 G2s can handle 2 SP20s without any issues. We've run them up to 1400W constantly at the wall back in the GPU days. Just make sure it's not too hot in the room and it's all good to go.

Eh, even if it's hot, they're tanks. They're rated for continuous 1300w output at 50c ambient.

[CptTripps]

Great looking setup. I'm hoping to have something similar soon.

[DevonMiner]

They have been running for a week now and all with down-clocked to 600-650 Watt giving from 1150 to 1212 Ghash and Extreme Stable.
Giving me a 0,55 W/GH and thats pretty nice.

Next step for my SP20E farm will be 1330-1350 Ghash with a wattage pr miner of 811-825 Watt, giving me total 47 TH and 0,60W/GH... if price goes even higher up, third step is going to be 1470-1490 Ghash with a wattage of 1010-1025 Watt = 0,68 W/GH

There is still head room to push them up to 1650 Ghash a pcs total, but much higher Wattage

This is why I love the SP20 ... so configurable that allows you to react to current market conditions.

[chicagoleo]

Great info I'll be trying your settings after im all spun up.. 
The gf is still making power supplies...

http://i57.tinypic.com/otlq0x.jpg

[valkir]

These are really nice setup!
So we can run 2 sp20 on a evga 1300

[Xircom]

Great info I'll be trying your settings after im all spun up..  
The gf is still making power supplies...

Looks very good indeed.  Just noticed that you decided to use blade psu. Remember to ask insurance company if they will cover this mod.
What psu did you decide to use ?

[adaseb]

That's interested. How loud are they running at these underclocked speeds?