Topic: S3+ (BM1382) Overclocking with voltage setting - page 7. (Read 28757 times)

Theres two lines for 262.5 are people using the 15 or 16 delay?
And how do voltage settings compare from an s3+ to my antminer s3 b1. Would it be the same voltage a real 0750. Or more or less.
In voltage field i type 0750 correct?

I am not sure why you refer to the /etc/cgminer file as the new firmware (where you can set voltage) uses another file to set timeout, freq and regvalue. There is a link in the OP in this regard (about adding frequencies), and extracting the 262.5 freq line I get: 15:262.5:0a02

Running at that freq with a voltage setting of 0750 has a theoretical power draw of approx 300 watts for the chips and a fully populated 6 pin PCI-e connector can carry (12v * 7.5A) * 3 = 270 watts each (540watts for both), so with at least a 550 watt PSU (edit: with all the wattage on the 12v rails) powering your S3 variant, you only need 2 PCI-e connectors. The power draw at the wall will only increase if / depending on the PSU you have powering your rig, and if over-specified, there won't be a change. Given that the default setting was 0725, 0750 is only a mild increase!

Running at 262.5 and 0750 what should the reg value and delay be set to as shown in chart on page 1 of this thread?  In etc config cgminer it says something like 10:262.5:09bb. I made up the numbers as im not available to check it now but thats what i am referring to.  Can someone post their cgminer config file running stable at 262.5 and 0750

Also at this setting you would only need 2 pcie cables correct?  Would hooking all 4 up cause more watts at the wall or help any?

forgot to write vi  

Never had a permission denied on that file.

I tried both October f/w. But gonna try once more when i get home.

Which firmware version do you have ? You should update it to the October one.

that's my guess

alias: -l not found
root@AntMinerS3:~# /usr/lib/lua/luci/model/cbi/cgminer/cgminer.lua
-ash: /usr/lib/lua/luci/model/cbi/cgminer/cgminer.lua: Permission denied
root@AntMinerS3:~#

So how can i add more of those frequencies?
The other thread didn't give any guidelines

I tried many voltage (0.7 - 0.725 - 0.75 - 0.8 - 0.825) with different frequency and I'm getting good result for like 6 hours one machine and like 8-12 hours and two others, after that it's falling off.

I can't make them stable on the long run. They need restart.

I would steer clear of setting voltages on that. There are quite a few un-knowns about the Nov firmware update (mainly for the PIC), but I have seen a tech from bitmain advising NOT to alter voltage.
A word to a wise man is enough.

November firmare as i can see "File System Version Wed Nov 26 10:27:37 CST 2014"

First, you need to ensure that your C1 is NOT running the November firmware before you can change the default setting. This thread is beyond that scope, but a lot has been said in the S3 discussion and support thread.

The datasheet setting for the freq range of 225 (which I'd say 218.75 falls) is 0.72v, so I'd test with a voltage setting of 0720 which should be more than adequate for that freq.

Again, do at your own risk!

On C1, with 218.75M(default) what voltage should i set, currently is 0760. Is it ok, because im not getting over 950ghs

Great work. Thank you I have tested some of this on my C1 unit and can confirm the higher voltage settings with the higher clock speed add stability to my C1 16 days strong no X's as well as higher hash rate with the overclock. I will try some of these settings on my S3's I have most of mine running very low HW error rate at 250Mhz now so I will modify the Freq file and test out the higher voltage with the beyond stock Freq values.

There you go, I have put up a poll on the thread, hopefully we'll get a good response. i've also left it open so anyone can view the results.

With regard to getting different people to carry out the tests and collating the results, I'll leave that to yourself to start the thread for that. You can start off with an empty table listing the freqs and voltages that you want, then people can opt to do the test by posting a message before they start, stating the freq & voltage they are testing, then posting results when they are done and you filling in the table in the OP.

Ain't no shame in that ma friend .....

This could probably be done easily by multiple people participating if one person put the info. all together.  Get people to post their results into one specific thread with directions on how to do each step and how to screen capture to post to that thread with the necessary stats.  Wouldn't need just one person and could eventually be completely filled in as more people add info.  The reason I selected 200M to 262.5M is that 200M seems to be the most power efficient if you're paying your own electric bill and 262.5M seems to be the highest OC without causing HW errors, etc.  The reason I stated .05v increments is to get the most detailed from the default voltage of 0770 to the suggested 0725 for the newest firmware, but could probably be done in .10v increments from 0720 to 0770 (6 volt. settings x 11 frequency settings = 66) to reduce the number of tests needed to fill in the graph/chart and also, if you find a sweet spot then the .05v could be added in between afterwards to get it more detailed later.  Would need to include which batch and which firmware used for each, also power rating with a Kill-o-Watt would make it more complete, as well as ratings for 120v vs. 220v.  Of course one person doing the original chart with the same equipment would probably make it much easier to start.

Shameless bounty hunters, we miners are

To be honest, I've (and many more out there!) have run a good number of that range - ofcourse tending to the OC side - but not for long enough (IMO) to be authoritative enough to form the definitive guide, also undocumented!
Saying that, the full range may be overkill and lack any useful result over and above what we already know, thus I'd suggest voltage increments of .25v over a 6hr period minimum. If anyone has 10 or more S3+'s, that would be trivial, then again, they'd have to "sacrifice" their earnings. If you only have a coupl of S3+'s, it won't require a herculian effort, but trivial it won't be.
Thus IITravel01, start a fund to get this off the ground and I am sure you won't be shy of takers!

Not quite.

...you mean like the one on pagE 1 of this thread?