antminer u1 overclock bfg | Bitcointalksearch.org

sharteel

newbie

Activity: 52

Merit: 0

hi,

Here my conf with BFGMiner 3.10.0 on rasberry-pi in my mind. I have antminer U1 and U2 on same usb hub and work at 2ghz.

Code:

{

,
"api-listen" : true,
"api-port" :"4028",
"expiry" : "120",
"failover-only" : " true,
"log" : "5",
"queue" : "2",
"scan-time" : " 60",
"worktime" : true,
"shares" : "0",
"kernel-path" : "/usr/local/bin",
"api-allow" : "W:0/0",
"scan" : [
"antminer:all"
],
"set-device" : [
"antminer:clock=x0981"
]
}

have fun

++

ubergeekin

newbie

Activity: 9

Merit: 0

I've replaced one of my antminers with 0603 10K OHM and 4.99K OHM SMD resistors. I have been able to overclock it successfully to 2.5GHz, but it doesn't go past that without giving a lot of hardware errors. I'm reasonably sure this is an issue with cooling on the ASIC. I will attempt to work out a way to diffuse heat better and see if this yields better results.

Has anyone else tried this? Huh

efarah2549

member

Activity: 98

Merit: 10

you need to do modify the hardware to go over 2Gh/s , I think it requires replacing a resistor

minoccio

newbie

Activity: 41

Merit: 0

I can't overclock at all my antminers, with bfgminer. Every value I put I obtain always 1.6 Gh/s. Tested with --set-device antminer:freq=x0881 and --set-device antminer:clock=x0881.
P.S. what is the correct, "clock" or "freq" parameter? (I use Raspberry Pi with raspbian OS)

melmo

full member

Activity: 213

Merit: 100

Do your hubs have enough power?

dongerous

newbie

Activity: 9

Merit: 0

Some people have written that they are hit-or-miss with overclocking beyond 2GH/s --without-- changing the resistors.
It may be that the voltage needed to overclock simply isn't there with all hubs/connections/some other speculative answer.

The answer may lie in the fact that with stock resistors the device is working on 0.8v.
If you change the resistors to allow a supply of 1.0v through the device it may overclock with no argument.

Just a thought. Also, I found it pretty cool that Bitmain would supply this kind of information without being asked.

Sorry for crappy answer. I'm sure it's not the answer you were looking for Embarrassed

efarah2549

member

Activity: 98

Merit: 10

I've had the same problems. It's annoying because I have two fans on them so they can run a lot higher. Thinking of switching over to cgminer.

When trying to overclock it I will get like half of them not showing up then I have to restart it until they appear again.

monsieurmarc

newbie

Activity: 40

Merit: 0

+1 from me

parat8t9

full member

Activity: 154

Merit: 100

I'm also interested in this.

ipoomyself

newbie

Activity: 50

Merit: 0

hi i have an issue with overclocking the antminer u1 but i cant post int he form i have an really important issue to discuss.. it overclocks to 2gh/s when i set the freq code but when i set the freq code to mine at 2.2gh/s it reverts to the default 1.6gh/s this is with the BFG miner 3.10.0 i switched to bfgminer because its more stable than cgminer cgminer wont detect multiple usb erupters unless i mess about and plug each one in at a time however it did mine a 2.2 for each erupter connected now i can only mine at 2.0 using bfg but the reason why i use bfgminer is because it auto detects the erupters so i dont have to mess about plugging them in and mess about with slicon drivers etc..

help me in the right direction please

examples

--set-device antminer:clock=x0981 this works at 2gh/s
--set-device antminer:clock=x0A81 this doesnt work at 2.2gh/s it reverts back to 1.6gh/s

this is with the bfgminer

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