Topic: How to overclock bitfury asic usb miner? (Read 3771 times)

What is not clear?

Would you like to 'quote' the post that is unclear to you.

That one was pencil modded and giving me



around the  2.69Gh/s (or 2.89 with 6.1% errors).

I didn't push it very hard, even with all that aluminium I was still a bit worried of cooking it.



As for baby oil damaging the board, I have not noticed anything bad yet, and I am not aware of any thing but I am always willing to learn.


That would have been a mess. I didn't believe it was leaking at first, I assumed I had spilled some and just wiped it up. Then I went to check on it again and there was more that needed wiping up.


Lol, yes. Thanks!

How fast is it going with that on there?

Cool deal literally.
Lucky it was not a worse leak in the plastic cup.
Also I though baby oil had stuff in it that degraded the board?

This one is my minimal fan, air cooled attempt for the pencil mod.

The chip heatsinks are chopped up old GPU or northbridge heatsinks, but they also appear on ebay as Raspberry Pi Heatsink Sets or similar.

It looks a bit of a mess  

The soldering was quite simple, some kynar kynar wrapping wire attached to the resistor pads and the other ends linked to the 50K variable resistor. The 50K was all I had, a 10K or 20K would have been better. I set the resistance on the pot to something sensible before soldering it.

The oil bath is now version 2.

Version 1 used a plastic container which got too hot and melted a small hole, loosing some of the oil.

Version 2 uses a glass mug found in our kitchen cupboard, no chance of melting that.




The pictures are a bit poor because they are taken through glass, but you can see the green kynar wire and the variable resistor.



The level of the mineral oil is a bit low, but I only had 100ml and lost a bit. The grey blocks are just there to raise the level of the mineral oil, just something I had laying around that didn't mind getting dunked in oil. I do plan to add more oil so the last of the chips gets covered and to add more heat capacity.


The bands around the board are holding on the heatsinks. I originally fitted these when it was air cooled, they are attached by 3M thermal tape but I thought they would be better if they stayed on, rather than dropped off. Although I did loose one in the transition, you can see one chip exposed.


The mineral oil is Johnson and Johnson Baby Oil because its what I had laying around 

Very cool.
Do you have pics?
I would love to see how that looks and was done.

Wow this is a scientist gathering thread. 

I gave up with the pencil and soldered a variable resistor in parallel with the R15 and submerged the board it in mineral oil.



Running at 2.93Ghz (3.26Ghz with 9.7% error rate)

Yes the first swipe or two I don't think my pencil was broken in enough yet and laid down not much.  One swipe and test for an hour each time is how I got it up there and then finally back down to optimal level.

Looks like I need to give mine a bit more pencil    Thanks!

I did get it all the way up to 4.1 but it was throwing huge errors so I erased the pencil and started again I made sure to lay down and even pencil mark.  3.33 seems to be the sweet spot on mine.  Fast and cool with no issues.
MultiMiner is a GUI for BFG with some enhancements so those commands may work as well.  I will try them out and see what I can get.
Thanks 

BFGminer has access to the oscillators,

eg

So there may be something similar in multiminer?


Or maybe you need a bit more pencil, or a different hardness pencil?

I tried the pencil mod on one of my RedFuries and I do not really get anymore than 100mh/s bump.
I wonder is there an argument you can use in MultiMiner to overclock with oscillator bits instead of the pencil mod?

BF1 pencil modded, doing well. With improved cooling and heatsink.

You can't get any more step-by-step than the original post.


It didn't work for me on a gnu/linux BFGminer 3.9.0 or various other versions I tried, I don't get a response from M then O, on a Bitfury BF1 so I stuck with the pencil mod.

Can you give us a step buy step please.

Oh YAAAAA...thank you. Finally, a straight answer. And, very well explained. My miner was doing a cool running 2.083Gh and I just wanted to bump it to the, so called, specks. This worked! It took 2 lines, laid very thin. I now clock at 2.379. Doesn't sound like much, however, it's very good to see. Gotta say, runs almost hot! I'll add a fan. THANKS AGAIN! Now, I'm happy.
Just in case I can help, I found a Windows GUI program for 'flashing' these (and other AtMel bitfury chips) if needed. Took some doing. Let me know if I can help.

ooppssss! Almost forgot. the link.. http://www.atmel.com/tools/FLIP.aspx. You may need an account, not sure, but it worked for me. Just make sure you have the .hex file before you try. Good Luck!

to overclock bitfury asic usb miner you need to calculate voltage
feel free to make me a donation

I had a bitfury bluefury and I could overclock in bfgminer by changing oscillator bits by pressing M and then O while bfgminer running. Stock is 50 which runs at about 2 gh/s. By changing to 53 or 54 you can achieve 2.5 gh/s. This also works on a redfury and icefury. Any higher you will need additional cooling.

The soldering option may also work as mentioned above ( thanks to Colin Miner for detailed advice ) but this might be an easier option.