Topic: [SOLD] What's the price for a "customized" BlackArrow Prospero X-3? (Read 580 times)

his miner can burn your home...
do not use it

In fact, i must be serious and say i really don't know the SP20E eficiency, because i didn't test it, yet, but i think the Minion Chip is a good chip.
But i did a complete test with 6 Antminer S3 to see their eficiency, and this is my results (also tested with same power meter):

Frequency - consumption - hashpower - eficiency
225 Mhz - 382w - 452Gh/s - 0,85w/Gh <-- Default S3+ configuration
218 Mhz - 362w - 435Gh/s - 0,83w/Gh <-- Default S3 configuration
212 Mhz - 355w - 420Gh/s - 0,85w/Gh
206 Mhz - 343w - 410Gh/s - 0,84w/Gh
200 Mhz - 330w - 405Gh/s - 0,81w/Gh <-- ATM i have an S3 running this setup last 5/6 days
196 Mhz - 323w - 390Gh/s - 0,83w/Gh
175 Mhz - 284w - 358Gh/s - 0,79w/Gh <-- Only 15 minutes test
150 Mhz - 242w - 300Gh/s - 0,81w/Gh <-- Only 15 minutes test
125 Mhz - 199w - 275Gh/s - 0,72w/gh <-- Only 5 minutes test

I think it could be more exact, but it is good data. All tests was done with an 80 Plus Gold PSU.
So, Antminer S3 gives +-0,84w/Gh eficiency, not ~0,77w/Gh (theorical eficiency)

not true! s3 efficiency is ~0.77 w/GH


underclocked sp20 goes under 0.5w/gh

added this information:

At this moment i'm doing some mining tests, using a 80 plus bronze PSU with theese configurations (i use this power meter: http://www.amazon.es/gp/product/B001TL36AK?psc=1&redirect=true&ref_=oh_aui_detailpage_o01_s00 ):
Voltage - Frequency - HashPower - Consumption - eficiency
0.7325v - 800Mhz - 655Gh/s - 650w - 0,99 w/Gh
0.7325v - 700Mhz - 635Gh/s - 580w - 0,91 w/Gh
0.7325v - 600Mhz - 545Gh/s - 505w - 0,93 w/Gh
0.7250v - 700Mhz - 600Gh/s - 575w - 0,96 w/Gh
0.7250v - 600Mhz - 550Gh/s - 531w - 0,97 w/Gh
0.6750v - 600Mhz - 475Gh/s - 400w - 0,84 w/Gh <-- The Antminer S3 eficiency!
0.6750v - 500Mhz - 475Gh/s - 378w - 0,80 w/Gh
0.6500v - 500Mhz - 450Gh/s - 330w - 0,73 w/Gh <-- A very good eficiency, sure
0.6250v - 400Mhz - 370Gh/s - 240w - 0,65 w/Gh <-- Awsome eficiency, better than Spondoolies SP20E <-- In fact i can't do a real test because i have no SP20E to do it, yet, so i don't really know the SP20E eficiency
0.6000v - 400Mhz -  Not tested yet...

a good overall for this old miner, sure (at low hashpower have a very good eficiency!!)

check your pm 

The configuration i used was: 0,775v at 700Mhz and 0,73125v at 700mhz

I really don't know, it was working at 800-850ghs with the original psu, never overclocked... The original psu was a 1400w

Well... I might take it if the price is right.
Is this one of the fire hazard ones?
Or is it ones of the fixed ones?

TBH, they don't sell.

I sold a x3 for around 1.5btc , full funtioning whit all the parts, PSU.

I don't think you will get much.. my batch was from oktboer 2014 and it had the faulty thingies removied from factory.

Was running great but a piece of junk really, the LCD is fucking bad .

Firmware is bad. yeah u know it

Hi, I have a BlackArrow Prospero X-3 with 2 problems:

1.-There is 1 chip broken (it is running with 9/10 chips).
2.-The PSU is broken, too

So, I customized the PSU and now it have 4 molex conectors to connect any psu. It works great, and now it is underclocked and is hashing very fine at 470Gh/s consuming 380w at the wall (PSU with 80+Bronze), so it does a very good 0,81w/ghs ratio.
I would like to sell it, on eBay, here or in anywhere. But I don't know what could be it's value.
Can you help me?

At this moment i'm doing some mining tests, using a 80 plus bronze PSU with theese configurations (i use this power meter: http://www.amazon.es/gp/product/B001TL36AK?psc=1&redirect=true&ref_=oh_aui_detailpage_o01_s00 ):
Voltage - Frequency - HashPower - Consumption - eficiency
0.7325v - 800Mhz - 655Gh/s - 650w - 0,99 w/Gh
0.7325v - 700Mhz - 635Gh/s - 580w - 0,91 w/Gh
0.7325v - 600Mhz - 545Gh/s - 505w - 0,93 w/Gh
0.7250v - 700Mhz - 600Gh/s - 575w - 0,96 w/Gh
0.7250v - 600Mhz - 550Gh/s - 531w - 0,97 w/Gh
0.6750v - 600Mhz - 475Gh/s - 400w - 0,84 w/Gh <-- The Antminer S3 eficiency!
0.6750v - 500Mhz - 475Gh/s - 378w - 0,80 w/Gh
0.6500v - 500Mhz - 450Gh/s - 330w - 0,73 w/Gh <-- A very good eficiency, sure
0.6250v - 400Mhz - 370Gh/s - 240w - 0,65 w/Gh <-- Awsome eficiency, better than Spondoolies SP20E <-- In fact i can't do a real test because i have no SP20E to do it, yet, so i don't really know the SP20E eficiency
0.6000v - 400Mhz - 315Gh/s - 208w - 0,66 w/Gh

a good overall for this old miner, sure (at low hashpower have a very good eficiency!!)

Thanks!

The PSU to molex work:




Some pictures about it's configuration and working: