Topic: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] - page 13. (Read 69499 times)
Trends.. I think I understand what you are saying.... When I measure the R3, etc resistor on my ant I see a value of 4.47K... duh.. it's in circuit... I'm yet again a dumbass.
I have never done anything like this, so a few questions from a newb:
1. My understanding that for undervolting as per bitmain scheme, I will be removing R3, etc. resistors, but then instructions are a bit thin for me…Do I put something else in place? bitmain says: refer to resistor value to replace. This is where I don't understand. I have to replace R3 and 7 other resistors (8 total, 4 on each board) with what?
2. how POTs came into this? Is it a POT I have to put in place of removed resistors, or is it optional and I can simply put a small droplet of tin where resistor (R3, etc) was?
Thanks
[/quote]
Yes remove the R3, R66, R38 & R52 resistors from each blade. Either replace these removed resistors with new resistors of the value Bitmain has given (3.24Kohm for 102.4Ghash or 4.02Kohm for 115.2Ghash).
Alternatively instead of putting in the fixed value resistors (3.24 or 4.02) put in a 0 to 10Kohm adjustable resistors (POT) (this is what is shown on the pictures attached a page or two back). With the POTs you can undervolt, go back to stock, or if you are brave overvolt with no more hardware changes!
Trends
Wish I had a clue about any of this to be honest.
I've read this thread in full now and my head is spinning!!
I have NEVER done any electrical work or soldering - does anyone here live in the UK and fancy doing this for me in exchange for a few £'s lol?
Posted from Bitcointa.lk - #IA5nM31NyUvnqb8h
I've read this thread in full now and my head is spinning!!
I have NEVER done any electrical work or soldering - does anyone here live in the UK and fancy doing this for me in exchange for a few £'s lol?
Posted from Bitcointa.lk - #IA5nM31NyUvnqb8h
Yeah, I don't want to test the higher end. Mine are at 4.47 (give or take) currently. I'll only be in the 4.47k to 3.2k range 
or lower... edit... I'm a dumbass... 5K pots turned all the way up are going to result in too low resistance to hit the lower voltages?
or lower... edit... I'm a dumbass... 5K pots turned all the way up are going to result in too low resistance to hit the lower voltages?
0k to 5k pot is common to find.
my guess is cranked to 5k you could achieve 220gh at 450- 460 watts on a good plat psu with extra cooling.
while lowered to 3k you can do 140gh at 175 watts>>> i did this one one of mine.
I would love for all my s-1's to have a 0k to 5k pot or better yet a 2.5k to 5k dial in option.
2.5k would prevent too low and 5k would prevent too high
How are you going to achieve 220gh at 450- 460 watts with a 5K pot or resistor? The stock R3, 66, 38, 52 resistors are 8.2K which give a voltage of 1.12-1.13VDD at the chip (check the S1 schematics or the BOM).
Turn the pencil you used for the pencil mods around and use the rubber to erase your calculations
If you ever wanted to get back to "stock 180GH" your pot would have to go up to 8.2Kohms which puts you at 1.12 -1.13 V at the chip.
5K ohm will only get you up to 0.9 to 0.92 V at the chip.
0- 10K are just as common as 0-5K and both are priced the same at $0.40 - $0.70ea
If you're going to play, play right.
5K ohm will only get you up to 0.9 to 0.92 V at the chip.
0- 10K are just as common as 0-5K and both are priced the same at $0.40 - $0.70ea
If you're going to play, play right.
Yeah, I don't want to test the higher end. Mine are at 4.47 (give or take) currently. I'll only be in the 4.47k to 3.2k range
or lower... edit... I'm a dumbass... 5K pots turned all the way up are going to result in too low resistance to hit the lower voltages?
or lower... edit... I'm a dumbass... 5K pots turned all the way up are going to result in too low resistance to hit the lower voltages?
0k to 5k pot is common to find.
my guess is cranked to 5k you could achieve 220gh at 450- 460 watts on a good plat psu with extra cooling.
while lowered to 3k you can do 140gh at 175 watts>>> i did this one one of mine.
I would love for all my s-1's to have a 0k to 5k pot or better yet a 2.5k to 5k dial in option.
2.5k would prevent too low and 5k would prevent too high
I have never done anything like this, so a few questions from a newb:
1. My understanding that for undervolting as per bitmain scheme, I will be removing R3, etc. resistors, but then instructions are a bit thin for me…Do I put something else in place? bitmain says: refer to resistor value to replace. This is where I don't understand. I have to replace R3 and 7 other resistors (8 total, 4 on each board) with what?
2. how POTs came into this? Is it a POT I have to put in place of removed resistors, or is it optional and I can simply put a small droplet of tin where resistor (R3, etc) was?
Thanks
Yeah, I don't want to test the higher end. Mine are at 4.47 (give or take) currently. I'll only be in the 4.47k to 3.2k range
or lower... edit... I'm a dumbass... 5K pots turned all the way up are going to result in too low resistance to hit the lower voltages?
or lower... edit... I'm a dumbass... 5K pots turned all the way up are going to result in too low resistance to hit the lower voltages?
0k to 5k pot is common to find.
my guess is cranked to 5k you could achieve 220gh at 450- 460 watts on a good plat psu with extra cooling.
while lowered to 3k you can do 140gh at 175 watts>>> i did this one one of mine.
I would love for all my s-1's to have a 0k to 5k pot or better yet a 2.5k to 5k dial in option.
2.5k would prevent too low and 5k would prevent too high
Yeah, I don't want to test the higher end. Mine are at 4.47 (give or take) currently. I'll only be in the 4.47k to 3.2k range
or lower... edit... I'm a dumbass... 5K pots turned all the way up are going to result in too low resistance to hit the lower voltages?
or lower... edit... I'm a dumbass... 5K pots turned all the way up are going to result in too low resistance to hit the lower voltages?
According to Bitmain their chip voltage range is 0.75V to 1.20V.
To achieve this range you need ~3.2 ohms to ~9.7 ohms (I don't have my calc's with me but these values are very close)
To achieve this range you need ~3.2 ohms to ~9.7 ohms (I don't have my calc's with me but these values are very close)
Added link to my pictures of the 10k pot addition to S1's.
http://imgur.com/a/8SUO8
It would be best if you are going to just change out the resistor to put in a 10K pots!
Then when BTC is worth $1000 or so you can just crank the S1 back up to 200Gh without more hardware changes.
Even with the price rising I'm going to do the pots... In my case I'm going to throw 5K pots on... I just don't have to turn them down right away
Thanks Trend for the pics! Added link to my pictures of the 10k pot addition to S1's.
http://imgur.com/a/8SUO8
It would be best if you are going to just change out the resistor to put in a 10K pots!
Then when BTC is worth $1000 or so you can just crank the S1 back up to 200Gh without more hardware changes.
You could do a side business s-1 mods. you need coins to drift upwards at the correct pace.
Added link to my pictures of the 10k pot addition to S1's.
http://imgur.com/a/8SUO8
It would be best if you are going to just change out the resistor to put in a 10K pots!
Then when BTC is worth $1000 or so you can just crank the S1 back up to 200Gh without more hardware changes.
they could put the resistors in and sell the modded ones as s-1A's
low power model.
better yet they could put in 8 pots 3k ohm to 4.47k ohm and sell them as adjustable models
low power model.
better yet they could put in 8 pots 3k ohm to 4.47k ohm and sell them as adjustable models
ones with pots would be great - I would like to see them release a more compact 'S1A' with slightly smaller heatsinks closer together and an initial 150GH/200W spec. This could drop the costs slightly and handle the first small undervolting step for the consumer
I don't believe they will come out with such an exclusive run down version of Ant S1. I'm waiting for their new generation hardware announcement.
depends how far off the next gen is. If its still a month or two away it may serve bitmain well to release a slightly undervolted version of the S1 in order to keep competitive in poth price and efficiency.
I 'know' i cna undervolt my antminers when the time comes (very soon), but i really dont look forwards to repeating the process 16 times...
well if coins creep past 700 usd undervolting gets put off a month.
I'm in the same boat with you. Hopefully the price keeps going up, then I won't have to worry about undervolting for awhile more. The only reason I wanted was so that I could add more hardware, but if the price keeps going up, I won't have to worry about adding new hardware for another month or two.
Oh in ref to the fan I was mentioning earlier; I forgot to mention that I put in a little dab of hot glue on the frame where the fan would be, that gives it a bit of a gap (basically using it as spacers) so I can use the two screws I took off the original fan, that way I avoid the fan blades hitting the little screws there are there.
they could put the resistors in and sell the modded ones as s-1A's
low power model.
better yet they could put in 8 pots 3k ohm to 4.47k ohm and sell them as adjustable models
low power model.
better yet they could put in 8 pots 3k ohm to 4.47k ohm and sell them as adjustable models
ones with pots would be great - I would like to see them release a more compact 'S1A' with slightly smaller heatsinks closer together and an initial 150GH/200W spec. This could drop the costs slightly and handle the first small undervolting step for the consumer
I don't believe they will come out with such an exclusive run down version of Ant S1. I'm waiting for their new generation hardware announcement.
depends how far off the next gen is. If its still a month or two away it may serve bitmain well to release a slightly undervolted version of the S1 in order to keep competitive in poth price and efficiency.
I 'know' i cna undervolt my antminers when the time comes (very soon), but i really dont look forwards to repeating the process 16 times...
@628 and higher prize will keep us from doing the mod. Let it continue. Atlast I will put a pot.
they could put the resistors in and sell the modded ones as s-1A's
low power model.
better yet they could put in 8 pots 3k ohm to 4.47k ohm and sell them as adjustable models
low power model.
better yet they could put in 8 pots 3k ohm to 4.47k ohm and sell them as adjustable models
ones with pots would be great - I would like to see them release a more compact 'S1A' with slightly smaller heatsinks closer together and an initial 150GH/200W spec. This could drop the costs slightly and handle the first small undervolting step for the consumer
I don't believe they will come out with such an exclusive run down version of Ant S1. I'm waiting for their new generation hardware announcement.
depends how far off the next gen is. If its still a month or two away it may serve bitmain well to release a slightly undervolted version of the S1 in order to keep competitive in poth price and efficiency.
I 'know' i cna undervolt my antminers when the time comes (very soon), but i really dont look forwards to repeating the process 16 times...
well if coins creep past 700 usd undervolting gets put off a month.
they could put the resistors in and sell the modded ones as s-1A's
low power model.
better yet they could put in 8 pots 3k ohm to 4.47k ohm and sell them as adjustable models
low power model.
better yet they could put in 8 pots 3k ohm to 4.47k ohm and sell them as adjustable models
ones with pots would be great - I would like to see them release a more compact 'S1A' with slightly smaller heatsinks closer together and an initial 150GH/200W spec. This could drop the costs slightly and handle the first small undervolting step for the consumer
I don't believe they will come out with such an exclusive run down version of Ant S1. I'm waiting for their new generation hardware announcement.
depends how far off the next gen is. If its still a month or two away it may serve bitmain well to release a slightly undervolted version of the S1 in order to keep competitive in poth price and efficiency.
I 'know' i cna undervolt my antminers when the time comes (very soon), but i really dont look forwards to repeating the process 16 times...
they could put the resistors in and sell the modded ones as s-1A's
low power model.
better yet they could put in 8 pots 3k ohm to 4.47k ohm and sell them as adjustable models
low power model.
better yet they could put in 8 pots 3k ohm to 4.47k ohm and sell them as adjustable models
ones with pots would be great - I would like to see them release a more compact 'S1A' with slightly smaller heatsinks closer together and an initial 150GH/200W spec. This could drop the costs slightly and handle the first small undervolting step for the consumer
I don't believe they will come out with such an exclusive run down version of Ant S1. I'm waiting for their new generation hardware announcement.
they could put the resistors in and sell the modded ones as s-1A's
low power model.
better yet they could put in 8 pots 3k ohm to 4.47k ohm and sell them as adjustable models
low power model.
better yet they could put in 8 pots 3k ohm to 4.47k ohm and sell them as adjustable models
ones with pots would be great - I would like to see them release a more compact 'S1A' with slightly smaller heatsinks closer together and an initial 150GH/200W spec. This could drop the costs slightly and handle the first small undervolting step for the consumer
they could put the resistors in and sell the modded ones as s-1A's
low power model.
better yet they could put in 8 pots 3k ohm to 4.47k ohm and sell them as adjustable models
low power model.
better yet they could put in 8 pots 3k ohm to 4.47k ohm and sell them as adjustable models
Thank you Bitmain for releasing some good values to work on!
I'm going to get this done ony remaining S1s
I'm going to get this done ony remaining S1s
Can't wait to see your output.
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