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For Sale: 2x HEX8A1 Asic 260 GH/s Miner with PSU - 500€ per miner - SOLD
Hi,
I am selling my 2 HEX Asic Miners, each 260Gh/s with a single Rail PSU.
I added silent fans to the system instead of industrial noisy fans. I operate the miners in my living room, so the noise level is pretty low.
Miners are in Vienna Austria. Shipping to EU Countries possible.
Price: 550 per miner.
best regards
stiffla
I am selling my 2 HEX Asic Miners, each 260Gh/s with a single Rail PSU.
I added silent fans to the system instead of industrial noisy fans. I operate the miners in my living room, so the noise level is pretty low.
Miners are in Vienna Austria. Shipping to EU Countries possible.
Price: 550 per miner.
best regards
stiffla
Re: [850 TH] Slush's Pool (mining.bitcoin.cz); TX FEES + VarDiff
since the new difficulty last week or so, my hashing power has not change and my reward was between 0.015 and 0.017, but now it has decreased to 0.010 and 0.013.
Does anyone have a similar issue?
Does anyone have a similar issue?
Re: [ANN] Technobit HEX8A1 - 130/260 GHs Coincraft A1 board-499/999 EUR March
The rule I use is can I keep my hand on it for 10 seconds.
Are you still running them 260/1000?Well, depends on how much pressure do I use to keep my hand on it for more than 10 seconds
No, never actually tried this settings, currently running @ 230 and 950mV
Re: [ANN] Technobit HEX8A1 - 130/260 GHs Coincraft A1 board-499/999 EUR March
This is my current setup with new fans.
I am still not sure what settings should I use, because the outside of the heatsink is still getting pretty hot und almost untouchable
Nevertheless, the reduction of noise level is really tremendous, it is not louder than my notebook when it is busy doing something
I am still not sure what settings should I use, because the outside of the heatsink is still getting pretty hot und almost untouchable
Nevertheless, the reduction of noise level is really tremendous, it is not louder than my notebook when it is busy doing something
Re: [ANN] Technobit HEX8A1 - 6/8 chip Coincraft A1 board -999 EUR March delivery
Ok got Bad Boy on it's own PSU and TP-Link and now it's hashing! 220GH/260W
Some hardware errors, that's probably the caps with bad legs. Still has green and orange light.
Bad Boy hates company!
I'll try and tape out the +5V and Ground in the USB cable and see if that makes him play nice with the others!
Some hardware errors, that's probably the caps with bad legs. Still has green and orange light.
Bad Boy hates company!
I'll try and tape out the +5V and Ground in the USB cable and see if that makes him play nice with the others!
Good to see that one is still working Gator
So I see you did add 3 arctic f9 to the good girl, right?
Are they sufficient enough and not that noisy?
Re: [ANN] Technobit HEX8A1 - 6/8 chip Coincraft A1 board -999 EUR March delivery
After playing with various setting, this is my final result
Locking good zich 
congrats
Yeah, thanks
After two days in same room with HEX8, i become familiar with the noise
Thx for your answers guys
So Zich, nice settings, do you use any extra cooling or can you touch your board longer than 5 sec?
Re: [ANN] Technobit HEX8A1 - 6/8 chip Coincraft A1 board -999 EUR March delivery
I have a question.
I have ~0.01% HW errors, but my Rejects or Refuses are quite high.
How can I get rid of them? Do I use the wrong clock setting?
Does this cause my variable btc reward at my pool, because normally it was really stable.
I have ~0.01% HW errors, but my Rejects or Refuses are quite high.
How can I get rid of them? Do I use the wrong clock setting?
Does this cause my variable btc reward at my pool, because normally it was really stable.
Re: [ANN] Technobit HEX8A1 - 6/8 chip Coincraft A1 board -999 EUR March delivery
Did you try it and know it works? Can you touch the heatsink for 10 seconds without burning fingers?
I'm guessing you will have to drop the clock/voltage a bit. How low did you go and what was the final GH?
The noise blockers are not as good CFM as the one I'm going to try, 3x Arctic F9 (9 blades) 43CFM.
So if yours work I have hope.
I'm guessing you will have to drop the clock/voltage a bit. How low did you go and what was the final GH?
The noise blockers are not as good CFM as the one I'm going to try, 3x Arctic F9 (9 blades) 43CFM.
So if yours work I have hope.
I would have gone for the Arctic F9 as well, but he already told me that the blockers are working quiet well
So i will wait what the outcome is on this
In the meantime, i started my second board with a little noise test
heres a screen from cgminer
Re: [ANN] Technobit HEX8A1 - 6/8 chip Coincraft A1 board -999 EUR March delivery
OMG guys the fans are worse than I thought! MARTO! 
BOTTOM FANS = Sunon PF92251V1-000U-G99/S99 = 92mm 12V 4.7W 4500RPM 46dBA 75CFM
TOP FAN = Sunon PMD1209PMB1-A(2).GN = 92mm 12V 12.5W 4900RPM 57.6dBA 120.2CFM
The thing is HUGE! Here it is next to a Hex16B!
I don't have time to mess with it today because it's valentines day and a couple of family birthdays too!
All the parts I need have arrived except the PSUs I had on back order.
I'll have to go hunting for a PSU tomorrow, can anyone confirm 850mV it runs < 264W?
I might just pick up a cheap 550W 44A to tide me over. It's using 17.2W just for fans!
On a serious note guys these fans are dangerous to little fingers. Keeps kids away/get fan guards. They only cost a few dollars.
BOTTOM FANS = Sunon PF92251V1-000U-G99/S99 = 92mm 12V 4.7W 4500RPM 46dBA 75CFM
TOP FAN = Sunon PMD1209PMB1-A(2).GN = 92mm 12V 12.5W 4900RPM 57.6dBA 120.2CFM
The thing is HUGE! Here it is next to a Hex16B!
I don't have time to mess with it today because it's valentines day and a couple of family birthdays too!
All the parts I need have arrived except the PSUs I had on back order.
I'll have to go hunting for a PSU tomorrow, can anyone confirm 850mV it runs < 264W?
I might just pick up a cheap 550W 44A to tide me over. It's using 17.2W just for fans!
On a serious note guys these fans are dangerous to little fingers. Keeps kids away/get fan guards. They only cost a few dollars.
I am currently running one board with a PSU where I use 2 rails 22A each, stable for 20 hours now with 980mV.
Re: [ANN] Technobit HEX8A1 - 6/8 chip Coincraft A1 board -999 EUR March delivery
Here some picture of my board that just arrived
And fan picture, i bet Gator-hex will be surprises
Bottom fan is "SUPER FAN" SUNON PMD1209PMB1A rated at 12,5 W, 4900 rpm & 57 dBA
Upper fan is SUNON PF92251V1-000U-S99 rated at 4,7 W, 4500 rpm & 46 dBA
After trying some setting:
Hex8A1 Chip Frequency : 250
Hex8A1 Chip Core Voltage : 980
Hex8A1 Set ASIC difficulty to one : 1
Ampere usage on 12 V rail is 30 A
And fan picture, i bet Gator-hex will be surprises
Bottom fan is "SUPER FAN" SUNON PMD1209PMB1A rated at 12,5 W, 4900 rpm & 57 dBA
Upper fan is SUNON PF92251V1-000U-S99 rated at 4,7 W, 4500 rpm & 46 dBA
After trying some setting:
Hex8A1 Chip Frequency : 250
Hex8A1 Chip Core Voltage : 980
Hex8A1 Set ASIC difficulty to one : 1
Ampere usage on 12 V rail is 30 A
Alright, so the bottom one is the pain in the ass
Do you think about any replacement options? I'm still on the looks for good fans right now
BTW: 30 A are quite ok, so you get approximately 1,44W/GH with this settings ,right? (i have avg 250GH/s)
Re: [ANN] Technobit HEX8A1 - 6/8 chip Coincraft A1 board -999 EUR March delivery
That's was huge heatsink . Seem like use 2 different type FAN, right stiffla?
Can not be sure until the parcel arrived.
. Seem like use 2 different type FAN, right stiffla?Can not be sure until the parcel arrived.
yeah right, the top one is thicker and I think much louder.
I have deported them now to my toilet with an slightly opened window, but they are still to loud in there
. Already waiting for neighbours to complain 
Re: [ANN] Technobit HEX8A1 - 6/8 chip Coincraft A1 board -999 EUR March delivery
Are they both Sunon Maglev PF92251V1-000U-S99 DC 12v 4.7W?
It's 127.43m3/h 75cfm.
I'm hoping the bottom one is slower! Dunno how I'd replace 75cfm to that heatsink!
Maaan, it will be a challenge to replace them with adequate fans
Re: [ANN] Technobit HEX8A1 - 6/8 chip Coincraft A1 board -999 EUR March delivery
You should be able to stick 2x 92mm fans on top with a lower/quieter RPM in that case.
I will do that for sure, at the moment it is not bearable.
two 92mm ~2000rpm on top, and the bottom one will be replaced too, just got to find the right ones
Re: [ANN] Technobit HEX8A1 - 6/8 chip Coincraft A1 board -999 EUR March delivery
Yeah the heatsink air flows are in a cross + so you cannot use a wind tunnel to cover both heatsinks with a big fan.
Can you measure the length of the heatsink and see if it's 184mm long.
2x 92mm fans on the top was my next idea, depends on length of heatsink though.
yeah heatsink is 183mm long, both fans are 92mm
Re: [ANN] Technobit HEX8A1 - 6/8 chip Coincraft A1 board -999 EUR March delivery
Where the heatsinks aligned like this = or this +?
If they were like this = I was going to build a wind tunnel and put a 120mm fan at one end and blow air over both heatsinks.
But last I saw Marto changed the heatsink design to +. For that configuration I was going to put 2x 43cfm 92mm fans on top with cable ties.
The heatsink is like this
Re: [ANN] Technobit HEX8A1 - 6/8 chip Coincraft A1 board -999 EUR March delivery
Try one volt 1000 mv and 257 clock
I will give it a try, thx
.Friend of mine just started his HEX8A1 board successfull with Odroid
This settings are not working after ~10min, but I guess it depends on my current PSU.
I was wondering about putting a slower fan on the top of the miner and two 120mm on the sides to get an air stream.
What do you guys think about this? I guess it would be much more silent than my curretn 80db
