Bitmain C1 Best Under Clock Settings? Freq & Volt?

lovenlifelarge

hero member

Activity: 676

Merit: 501

Quote from: macgyver007 on February 12, 2015, 06:16:10 PM

Im using 275 frequency @ .745v for testing which is broken in the firmware (you cant set it in the dropdown menu it comes up as 2,275MHz) Shocked

The closest you will get in dropdown is 268.75 which is 1085GH/s ...bitmain really needs to update the firmware for these but they do a great job for heating with minimal noise
Ambient room temp is 72F
Depending on which batch of C1 you have, there are different fans on the rads...it will either be 3 fans plugged into 2 headers which are the more powerful fans, or 1 fan into each of 3 headers which I believe are the first fans that were used....the lower powered fans use .1A less than the stronger ones not sure of exact numbers but there is a difference
When Im done testing the Avalon for efficiency I will plug the C1 in to my APC and see how much power it draws at different frequencies...give me a day or 2 time permitting

I was looking for underclock not overclock..

Also my firmware allows me to do 275 freq, Maybe u need to update ur miner

dunand

hero member

Activity: 637

Merit: 502

Quote from: macgyver007 on February 12, 2015, 06:16:10 PM

Im using 275 frequency @ .745v for testing which is broken in the firmware (you cant set it in the dropdown menu it comes up as 2,275MHz) Shocked

The closest you will get in dropdown is 268.75 which is 1085GH/s ...bitmain really needs to update the firmware for these but they do a great job for heating with minimal noise

You are stable with this overclock. What did you do to your miner? Did you change the thermal paste or something?

macgyver007

member

Activity: 105

Merit: 10

Im using 275 frequency @ .745v for testing which is broken in the firmware (you cant set it in the dropdown menu it comes up as 2,275MHz) Shocked

The closest you will get in dropdown is 268.75 which is 1085GH/s ...bitmain really needs to update the firmware for these but they do a great job for heating with minimal noise
Ambient room temp is 72F
Depending on which batch of C1 you have, there are different fans on the rads...it will either be 3 fans plugged into 2 headers which are the more powerful fans, or 1 fan into each of 3 headers which I believe are the first fans that were used....the lower powered fans use .1A less than the stronger ones not sure of exact numbers but there is a difference
When Im done testing the Avalon for efficiency I will plug the C1 in to my APC and see how much power it draws at different frequencies...give me a day or 2 time permitting

lovenlifelarge

hero member

Activity: 676

Merit: 501

Quote from: dunand on February 12, 2015, 03:47:59 PM

Quote from: lovenlifelarge on February 12, 2015, 02:53:53 PM

Quote from: macgyver007 on February 12, 2015, 02:36:21 PM

It sounds like your machine/rad is full of dust...get some compressed air or vacuum it out...what settings are you using now for voltage, clock speed and power supply etc...all my C1's are running just as good as day 1...well day 3 by the time I tweaked them all Cool

I have not tried to undervolt C1 yet as my units use anywhere between .745 and .755v to get to around 1.1TH which is fine by me

At what feq are u using??

Yeah they are a little covered in dust... ill give that a go...

I'm still not hooked on the whole water cooling idea, Its not much better than air cooling for noise

If your radiator is on the ground or in a dusty area there will be a built-up of dust between the 3 fans and the radiator. The best way to clean them is to unscrew the 4 screws on each fan and pass the vacuum once the fan is removed. You can do that without downtime.

Yet another good idea... Many thanks...

I also had 2 Unused S1's here so (I know this sort of defeats the purpose of water cooling) i took the fans off them & plugged them into the spare fan ports on the C1 & i stuck them above to blow additional cool air down on the water blocks & chips.

Now running 250 Freq @ 0745 volt = 1050gh at 50 degrees c

I still would like to know the best downclock there is so in the future i can push a little more out of this puppy!

Its the middle of summer here was hoping to heat the house this winter with these too..

dunand

hero member

Activity: 637

Merit: 502

Quote from: lovenlifelarge on February 12, 2015, 02:53:53 PM

Quote from: macgyver007 on February 12, 2015, 02:36:21 PM

It sounds like your machine/rad is full of dust...get some compressed air or vacuum it out...what settings are you using now for voltage, clock speed and power supply etc...all my C1's are running just as good as day 1...well day 3 by the time I tweaked them all Cool

I have not tried to undervolt C1 yet as my units use anywhere between .745 and .755v to get to around 1.1TH which is fine by me

At what feq are u using??

Yeah they are a little covered in dust... ill give that a go...

I'm still not hooked on the whole water cooling idea, Its not much better than air cooling for noise

If your radiator is on the ground or in a dusty area there will be a built-up of dust between the 3 fans and the radiator. The best way to clean them is to unscrew the 4 screws on each fan and pass the vacuum once the fan is removed. You can do that without downtime.

IITravel01

sr. member

Activity: 338

Merit: 250

250M at 0725 voltage. 1 HW error per a few hours. Room is currently 90 F and shows a 52 C temp. 1,007 Gh/s (avg.)

lovenlifelarge

hero member

Activity: 676

Merit: 501

Quote from: macgyver007 on February 12, 2015, 02:36:21 PM

It sounds like your machine/rad is full of dust...get some compressed air or vacuum it out...what settings are you using now for voltage, clock speed and power supply etc...all my C1's are running just as good as day 1...well day 3 by the time I tweaked them all Cool

I have not tried to undervolt C1 yet as my units use anywhere between .745 and .755v to get to around 1.1TH which is fine by me

At what feq are u using??

Yeah they are a little covered in dust... ill give that a go...

I'm still not hooked on the whole water cooling idea, Its not much better than air cooling for noise

macgyver007

member

Activity: 105

Merit: 10

It sounds like your machine/rad is full of dust...get some compressed air or vacuum it out...what settings are you using now for voltage, clock speed and power supply etc...all my C1's are running just as good as day 1...well day 3 by the time I tweaked them all Cool

I have not tried to undervolt C1 yet as my units use anywhere between .745 and .755v to get to around 1.1TH which is fine by me

lovenlifelarge

hero member

Activity: 676

Merit: 501

What settings are u usings to get the best hash per watt??

It seems my C1 is getting to the end of its days with more & more chips xxxx ing out so i wanna see how long i can keep it going at the best rate possible...

Topic: Bitmain C1 Best Under Clock Settings? Freq & Volt? (Read 1754 times)