BFGminer possible to set each AntMiner different clock

[CADuke]

Is it possible to set each AntMiner U2 at different clock. I purchased some used ones. Two of the used U2 show there age and do not want to run at 2.0 but will run at 1.8 same with two older U1 they will only run at 1.6.  If I try to set them anything else x0881 and x0781 respectively they hit about 30% hardware errors.  I have tried the following config file but it seems to read and use the last antminer:clock=.

Code:

{
"pools" : [
{
"url" : "stratum.bitcoin.cz:3333",
"user" : "XXXXX",
"pass" : "XXXXX",
"pool-priority" : "0"
},
{
"url" : "stratum.btcguild.com:3333",
"user" : "XXXXX",
"pass" : "XXXXX",
"pool-priority" : "1"
}
]
,
"api-listen" : true,
"api-mcast-port" : "4028",
"api-port" : "4028",
"expiry" : "120",
"expiry-lp" : "3600",
"failover-switch-delay" : "300",
"log" : "20",
"no-pool-disable" : true,
"no-client-reconnect" : true,
"no-show-processors" : true,
"no-show-procs" : true,
"no-unicode" : true,
"queue" : "1",
"quiet-work-updates" : true,
"quiet-work-update" : true,
"scan-time" : "60",
"skip-security-checks" : "0",
"submit-stale" : true,
"temp-hysteresis" : "3",
"shares" : 0,
"kernel-path" : "C:\\Program Files\\BFGMiner\\/share/bfgminer",
"scan" : [
"bigpic:COM6",
"antminer:COM7",
"antminer:COM8",
"antminer:COM9",
"antminer:COM10",
"antminer:COM11",
"antminer:COM12",
"antminer:COM13",
"antminer:COM14",
"antminer:COM15",
"antminer:COM16",
"antminer:COM17",
"antminer:COM18",
"antminer:COM21",
"erupter:COM19",
"erupter:COM20"
],
"set-device" : [
"antminer@COM7:clock=x0981",
"antminer@COM8:clock=x0981",
"antminer@COM9:clock=x0981",
"antminer@COM10:clock=x0981",
"antminer@COM11:clock=x0981",
"antminer@COM12:clock=x0981",
"antminer@COM13:clock=x0981",
"antminer@COM14:clock=x0981",
"antminer@COM15:clock=x0901",
"antminer@COM16:clock=x0901",
"antminer@COM17:clock=x0781",
"antminer@COM18:clock=x0781",
"antminer@COM21:clock=x0981"
],
"api-allow" : "W:127.0.0.1"
}

[nwoolls]

With BFGMiner and set-device, you can specify either the device path or device serial number, e.g.

Code:

--set-device antminer@/dev/USB1:clock=ABC
--set-device antminer@S1234567:clock=XYZ

The issue with using the device path is it may change after a reboot. The problem with using the serial number is many hardware manufacturers still do not brand their devices.

However, you can use the following tool to fairly easily add serial numbers and branding to cp210x devices:

http://cp210x-program.sourceforge.net

[CADuke]

With BFGMiner and set-device, you can specify either the device path or device serial number, e.g.

Code:

--set-device antminer@/dev/USB1:clock=ABC
--set-device antminer@S1234567:clock=XYZ

The issue with using the device path is it may change after a reboot. The problem with using the serial number is many hardware manufacturers still do not brand their devices.

However, you can use the following tool to fairly easily add serial numbers and branding to cp210x devices:

http://cp210x-program.sourceforge.net

Thanks update my .config file code above with antminer@COMXX:clock=x0123 seems to work for Windows. Same thing on reset the COM port might change since I inserted miners in different hubs at different times to get the order. 

[bruno033]

my config ( 16 U2 2.20) ( 1 U2 2.0 )

-S antminer:all -o XXX -u XXX -p 123 --set-device antminer:clock=x0A81 --set-device antminer@COM52:clock=x0981

http://img11.hostingpics.net/pics/896590Sanstitre.png