Topic: HEX16A3 - Avalon3 16 Chip miner by TechnoBit.EU real word test (Read 1801 times)

It could be that - I can hear the fan speed dropping a bit occasionally.

Check it out here https://bitcointalksearch.org/topic/m.7798028

And sorry, i can not answer you question since this thread not create by me but volosator

Rar, git checkout, & patch.

You also need to clarify what folder you're in for the commands.

Hence my curiosity about your OS.

Happened a lot to me lately with different miners. Measure your 12V line - it should be 12V (not 11.9) under load. Consider replacing power supply! I use IBM server 825W PSUs and absolutely happy with them - 12.1V under 100% load!

I've got four running with 7500:880, getting ~440GH/s on btcguild, power draw of three of them is 410W at the wall according to the watt meter I have.  Though I don't trust the watt meter much...

Oh, and they have dropped off once in the last 4 days.  But that may have been when I added the fourth miner.

Which command?

I have one of these, and your commands did not work on my Debian machine.

What OS are you using?

The DC-DC PSU part can give or add some 10 percent .
The rest is the chip
So you are not exactly right
Show me real world numbers of Avalon 3 implementation at the same clock rates with better power efficiency than 15 percent.
I agree that using ready DC DC solution for 40-50 USD  will improve the power consumption a little bit  but then pricing of the miner will go up and this is pointless, as far the chip pricing is too high for what it is at the current market.
So at the end Avalon 3 chip is not going to have sales as it was with Avalon 2 gen chip.
It came out too late, then Avalon freeze the sales for 1 month (similar story to Gen1 mess) and now it is almost obsolete.
As usualy Avlalon chips are power hungry at high clock.
The only way would be to under clock the chip if it has a good pricing.
Only then there will be some market for it

It is a problem with the parts used, the DC/DC is not very energy efficient, particularly when overclocked.

Good DC/DC components get 90% efficiency, these don´t.

Also, at 5.3GH/chip they run at 1w/GH at the wall.

However, that would only give 85GH/ board.

It is not a problem with the chip, but of implementation. Every chip will get terrible power efficiency when overclocked.

so a3 avalon is epic fail 1.6w/gh

gen3 really?

Hello fellow miners,

I thought it can be useful for someone one day.

Yesterday I received HEX16A3 miner from marto74. I didn't take any pictures. There was a lot of thermal paste, I had to clean the board from it. Stock cooler is very powerful and not very noisy.

Here is how I built the cgminer (each line is a separate command):


For testing, I used GHASH.IO mining pool. Worker difficulty was set to 64, seems optimal to me.

This is how I started cgminer:


Now, the most interesting part: real world testing.

Power supply used is Artesyn 7001138-Y000, which was pulled from old IBM server. Power supply output is 12.10V with no load. Please use search to find out how to mod the power supply so you can use it too. This power supply can be found on eBay for less than $20 with shipping!
Measurements were taken with Kill-A-Watt P3, each test iteration was 20-25 minutes, idle miner with fan spinning and connected to the host with USB cable is 16W. All power figures were adjusted for that. Power supply voltage output under load is 12.08V, which is very good for any miner out there! Ambient temperature was 25C. Temperature readings were taken with GM300 infrared thermometer at the hotest spot at radiator.



mV = milliVolts
chip = desired performance per chip, GHS
miner = cgminer average for 20-25 minute run
watt = power draw measured on wall minus idle
hw = hardware errors, %
W/GHS = Watts per GigaHash per second observed
PERF = performance observed per chip, GH/s + HW errors
comment = well, it is just there

880:7500 seems to be the sweet spot!

This is very mature product from technobit. I remember HEX16A, based on avalon gen 1 chips, performance wasn't so great, power draw and thermal both weren't that good, however the biggest concern for me was stability - miners used to disappear from the system randomly. I have not observed any stability issues with this miner!

I am NOT affiliated with marto74 or technobit in any way except I sent my chips in and got the assembled miner back.