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: