Reduce power 100W or more on your KnC miners

Hi all - I've read a lot about people increasing voltages to reduce errors and wake dies.. But how many of you have gone the other way and lowered voltages as much as possible while keeping errors low?

I have and I've reduced power by over 100W each of my November Jupiters using the 1.0 firmware. Here's a quick guide on what I did:

I'm going to assume you know how to use putty, can connect to the mining screen, and get around bfgminer settings.

As many have said, the first step is to change to bfgminer so you can see what's happening on each die. If you don't want to use bfgminer permanently that's fine, but you'll need it to tune so do this first and restart the miner if necessary.

Open the bfgminer screen and the advanced tab together. Then take a deep breath because you will probably freak out soon, but this is a very fast way to tune your miner. Read through the steps before you begin.

Make a note if your error %s by board. Reset stats in bfgminer. Adjust all voltages to -0.0803 and apply. This will make many of your dies start to throw errors and the screen will start to lite up with disabled core messages with a three digit code. The first digit is the board, 0 1 2 or 3 for a Jupiter, the next two are the core and this code also helps you determine which die. Here is the range from memory:
Die 1:aa-bv
Die 2:bw-dr
Die 3:ds-fn
Die 4:fo-hj

Check bfgminer error stats - for any boards throwing a lot of errors start looking for disabled die messages, I recommend going in sequence, if the first board is throwing errors look for disabled dies starting with 0. If you see:

0cn disabled

Then increase the voltage one step for board 1, die 2.

Keep watching the messages and try to find a core in each range. Don't spend too long, move on to the next board, repeating the process for all boards all core ranges.

Apply your changes and wait about 15 seconds for the firmware to cycle the cores.

Reset bfgminer stats. If you are lucky, and I was, one of your boards may already be stable. Repeat the process for any board that still has a high error rate. Only increase voltage one step at a time and only increase voltage when you see disabled core messages. Go through all boards all dies, apply, reset, repeat.

If you have any dies at -0.0803, lower these one step. Apply the settings, wait, reset stats, check errors. Reverse any that now throw errors, keep reducing any that are not producing errors.

Once you stop seeing disabled cores you may have a few dies that are still throwing errors. Now you want to switch bfgminer display to show all cores. Scroll through the list and look for ranges that have multiple cores throwing errors. Increase voltage one more step on these until you are happy with the error rate.

It took me about 10 minutes by the time I tuned my third Jupiter. All of my voltages are adjusted negative - most are around -0.05 to -0.07, I have a couple that went down to -0.09 and a couple that needed to come all the way back to -0.02. But, I've reduced both temps and power. I was getting many FAULT 4 messages regarding DC/DC temps but now they are all happy. Good luck and hope this helps you!

If KnC is nice maybe they will build auto monitoring and voltage trim right into the next firmware if they are really nice maybe I will get a few extra Neptunes for saving them a few megawatts in their data center

This was a release process bug; I re-built/signed/uploaded the OSX .dmg to fix it (and updated the SHASUMS files).

The warning is harmless, and no code was changed, so if you don't want to re-download and install you don't have to.

Thanks to lots of hard work from Luke Dashjr and Cory Fields we should (fingers crossed!) have deterministic OSX builds working before the next release, which will make this kind of error impossible.

Ya know what?   I don't need this shit. Here goes nothin'   I and my bro got ripped so you idiots can all FUCK OFF. And NO I never said I would hand out rewards for CTS refunds. I said I'd give up to 80% of RECOVERED btc if your info led to the RECOVERY of the btc... not REFUNDED by CTS because Jay got scared...yeah.. Jay Watson; Avenger's info on Jay was spot-on, but since Jay never saw it until after he REFUNDED WILLINGLY, it couldn't possibly have been a factor... but I was nice and gave rewards anyways, and not small ones. So go to your fucking dictionaries and look up the difference between Refund, and Recover. I chose that word for a reason. Then Avenger and Edgar have the gaul to try and make me look like the scammer when he himself had already pm'd me tons of proof to the contrary, and fucking NASA checked and verified it. They were live accounts. You saw them, so don't act like a sissy bitch liar now acting like you are almighty God himself and you deemed me Evil or something... To this I say.... GO FUCK YOURSELF YOU FUCKING LYING, BACKSTABBING, ASSHOLE IDIOT. I've done nothing wrong. Fuck off  Stupid idiots actually think we created this CTS crap so we could rip and refund ourselves? I've never heard a more stupid statement. Even after seeing live European local accounts linked to it. Duh. You guys have ate too many paint chips as children.
I offered you a tidy reward SEVERAL TIMES, and you refused it. It's all in the thread for all to see, along with other crazy totally insane shit.
And if anyone doubts me....Read the fucking blockchain transactions, and follow the money. Retards.
I'll never do anything for this forum again. It's simply over-run by asshole idiots.
bon-voyage

"Server hall will be ready in about a month."

Again what is your agenda exactly?

+1

I've been lurking in this forum for months, primarily to read what sturle has to say.

You were certain that Ukyo was a scam just a few minutes ago, while berating me for "... compar[ing] two scams to NEO & BEE."
Now that it's no longer convenient, you recant.
Danny, your banker of choice, claims that he knows what's up and the Ukyo mess is not a scam.
If Ukyo "sry bro, unavailable" is not a scam, then I have compared NeoBee to another upstanding business just like NeoBee.  What's the harm in that?
Wanna give it another shot without contradicting yourself?

All those are/were ran by well-known identities: Bitcoin Savings & Trust, BitFunder, ActiveMining, BFL, Mt.Gox, Bitcoinica, Labcoin… should we trust them?

What makes a scam isn't identities. It's the will to ignore everything for silly hopes of profit.

So you agree that Ukyo fiasco is a scam?
Odd, because Danny claims it is not...

Before raging, point to a specific statement in my post that you disagree with.
I'll wait

Yep.  Along with the granddaddy, Pirateat40's Bitcoin Savings and Trust.

You should read back about 50 pages or so and look at his posts to me. He does in fact try to insult me. Obviously it doesn't work.

Anyone who is trying to justify a business and their actions who is blatantly incompetent and abusing their customers should be called out.

I presume Sturle talking about my mother doesn't constitute an attempt to insult?

Let's be unbiased here. Thanks.

-----------To anyone interested I will provide the same service as quoted above, please PM if interested?----------

I will offer the same deal for the next few hours. PM me if interested. I will provide credentials which should be sufficient to establish trust.

Good artists copy, great artists steal.

FWIW, MTGOX to MTGOX transfers of Bitcoin are still enabled and working.
This means you can sell your GoxBTC for real BTC: Someone gives you a gox deposit address, you send your GoxBTC to that address and be sure to NOT check open-transaction. Coins show up instantly in their Gox accout.
People on Bitcoin talk are offering 60%, 66%, and 70% like prices.
I'll offer 85%— e.g. with round numbers: You pay me 100 GoxBTC I'll pay you 85 real BTC. You send first. This can be pretty handy if you'd like to use the current prices to get your GoxUSD out rapidly by trading for BTC and then selling that coin on something like Coinbase.
I'm mostly interested in trades over >5 BTC because I'm primarily a developer and miner, not a trader and these exchanges impose a fair amount of accounting overhead on me. I'll consider smaller offers, however.
PM if you're interested. (I'll edit or respond to this post when I'm unavailable or have changed my offer)

Perhaps you should tell Sturle that as well. It goes both ways. I've been only calling things as I see it.

Sturle seems like a real low life.