I can test it of sent me firmware

So, safe bet would be to keep DCDC amperage at 40 or below if I wanted the cubes to last longer? I see at 325 some of them goes as high as 44.

Thanks for the mention TXSteve.

The one thing in that video that I wouldn't recommend doing more than once, is bending those ends down on the cube case. It got pretty flimsy the second time I did that and it completely broke off the third time! KnC used some really cheap metal, which is even more aggravating considering what we paid for them, heh.

As TXSteve mentioned, taking the stickers off the VRMs is a good idea, especially if you use the thermal tape, like they did in the video.

GenTarkin, here's my before and after temps with the heatsinks and thermal epoxy/adhesive. https://i.imgur.com/2aE6f7S.jpg This is on a Neptune cube, but they are laid out the same. That hot VRM must be messed up or something, because it always runs really hot compared to all the rest of my cubes.

These also compare the different fans, KnC's supplied fans and the Noctua upgrade:
Copper Heatsinks with thermal tape: https://i.imgur.com/fcX9cp7.jpg
VS
Copper Heatsinks with thermal epoxy: https://i.imgur.com/yNIsXby.jpg
As you can see, the epoxy worked quite a bit better than the 3M thermal tape that came on the heatsinks.

I didn't do a test going from the stock thick thermal pads, to the heatsinks with thermal tape. I was doing this upgrade on the Bonus Neptune, which came with NO thermal pads! By the time I modified that one regular cube (first link), I had already switched to using the epoxy.

Here's my full gallery if you want to browse through the rest: http://imgur.com/a/zQDSa

hey teslaman, good to see you -- you were putting out a lot of good info on modding these things back when there was very little if any other info to go on. Copper heatsinks, 2 part thermal epoxy, noctura fans, cutting the Eplate and probably a bunch of other stuff I forgot, were all originally his ideas. After doing and redoing a bunch of these thing I like to think I learned a few of my own tricks too, but he got the ball rolling. thx dude 

Heh ..not even gonna look ...I have one cube with 2 dies runs hot as hell always has 325 mh all out.(since march 2015 when I got my 2nd unit)
.....i always expect it to burn out ....looked yesterday 90c plus as per usual
that was when I got the used unit...so all the cube goes full out.....at max 325 setting any other cube i throttle it back (or titan says no way) looked today
100 to 101c on the 1 die chugging merrily along...I am befuddled as always ..so that is what 8 months of full out wtf is going on ..then again it has been
11 months wtf is going on with the dies I have set to OFF its only fair I be confused the other way around

so again confused on what witchery is involved in this tried to tone it down last march the die would  not come back and previous attempts..but ..put it back at 325 setting etc and viola
bat out of hell since (highest producing die too ..heh figures)

so i only have 2 weeks left on my warranty so it will blow up 2 days after

but man i'm clueless as hell on how just plain 'weird' these units act from my own experiences and the folk's on here saying stuff

So I'm trying to go with the 'idea' (likely) as best I can recall in them 'heady' months when the Titan was expected to arrive on time and such

It was designed for 250mh .....the dc's etc components (power jacks) etc etc with the 'appropriate' over engineering for that 250mh unit

They figured out before shipping (w/o telling us imho) that the units were probably gonna ship late....so upped the hash from 250 to 300mh to
compensate for the lateness i suspect they saw coming (although to be fair I doubt they thought they'd be as late as they were) Again still within
the likely 'over engineering' on a 250mh design

They shipped......1st batch had bad dies..the firmware sucked with lots of errors etc...Initially I was told to mine at 300mh anything above that was
my own risk...the firmware ...buggy as hell for 2 months plus was not helping hash .even with LTC ...the hardware had the bad die issues..thus suddenly
when I had 2 bad dies on 2 diff cubes ..I was told to overclock it to 325 speed on adv page (ie ok by knc techs) so I did and it worked ok (with 2 off dies)

Side note: By the way I seem to remember the 1st firmware you could not even SET the speed above 300mh or am I incorrect? Anyone?

But then they changed the rules and said because my orig titan got 306.1 mh with 2 dead dies anything over 300mh they would not take back equip and
nor any cube with only 1 die off.....amazing how rules got changed. Again this was against their previous advice of 300mh was max.

So essentially to cover their ass on shoddy firmware and equip and lateness of shipping you were 'required' to overclock.... the F*ck out of your Titan
to get around their failed design/promises and ship date..thus burning a lot of stuff out early as you can see from the 'wreckage' of this thread over the last
year or so.....all risk on us!

to get to my POINT:

 IT IS IMHO A FRIGGING MIRACLE THAT ANY OF THESE TITANS THE WAY THEY WERE DESIGNED 'MANAGED' TO GET ABOVE 300MH FOR A YEAR! I JUST NEED
 TO DEAL WITH THAT 'REALITY' (ie KNC lied on what the product should do vs what it could do)

So trying to go with the flow...they are frigging overclocked to the max at 325mh adv page settings..so it is easier to limit my expections to reality then to try to figure out how to tweak
these units above 300mh when they already are in 'flaky mode' at probably 300mh ONLY ..from what they imho were designed for!

Got to admire that KNC 'evil genius' chutzpah thou! We have all the issues/risks/etc and they limit their problems with these units by a lot!

By the By I have 2 weeks left on my warranty ...anyone want to use me to swap a cube out to knc for their 200 bucks I'm trustworthy enough to do so
(then again with 2 weeks left they may just never send it back claiming it did not arrive even thou on the shelf..ie must remember the 'evil' we are talking about)

But we should have a mechanism on here to move cubes back thru trusted parties for folk who's warranty has already run out....I mean its not like they
did not play such games with us..the old razzle dazzle misdirection tricks... (then again send cube 200 buck fee....in say a month the knc tech is fired (or quits) due to his impending loss of a job...as the 12 month fix them requirement goes away)

hell probably should just send them to Vegas would be safer I guess ..just frosts my cookies for those with cubes as door stops as we speak because
it is already past 12 months and they are stuck......whatever just wool gathering on above

Gentarkin, great job on the software btw, I am one of your donators you mention current above 40A being an issue can you make your software keep the settings in a "safe" range etc ?

Hey I had a thought...has anyone been crazy enough to 'water cool' these Titans or Neptunes...that would be cool (and likely expensive) but man that would be
a cool youtube video

(I nominate TXSteve (Titan) and Telsaman..(Neptune)...  all those in favor...carries....hop right on that will you my good fellows..thanks )



my titan has all them temps beat ...at least this last summer.....the orig 2 dies on 2 cubes that I have OFF have been so since last winter. So the likely
too hot the way I ran them ..did not seem to (yet) have an effect.  Basement setup. lostgonzo.imgur.com Just using fans an airflow thru Basement.

Then again my Titans the orig and even the 2nd one probably (newbie on temp beg of summer) been run way to hot under what you know recommend. Kinda
glad I did not know this over the summer would have been freaking out. I thought 90c and below was OK.

The 2nd unit I got from a guy in Australia was run even harder before I even got it. Winter here is Summer there.

 The way I can tell from his cubes from my cubes is from the way the paint is flaking off the top....
...got that faded "sun blasted"  look....I'm sure it will bite me in the a*ss soon (short life) but whatever been lucky

whatever this is likely my last season of home mining anything ..this winter... anyway if it can hold together and beat elec price thru that season vs coin its a win imho!


Sigh ..I always thought this crypto mining hobby I got into in 2013 would have been a LOT funner with 4 guys and a co-op kinda arrangement..how i used to run a huge gamer BBS...4x the cash. 4x the equip 4x the size..and.someone always available when one of the sysop's cracked up and made a mad dash to throw the dos server off the roof. (ah good times drunk computer builds)

So I would be up to doing a lot of these mods and stuff..but away from the crypto mod herd ..all by my lonesome....little time...and the cowardice of being alone.

Well probably for the best a co-op of 4 buys in 2013 we would probably have been 'taken' by BFL and I'd have 4 less friends..but this stuff would be a hell of a lot more fun
with some more folk. (I've tried ....in upper midwest USA from what I can fathom ..if you do bitcoin..you are more 'evil' then a door to door Amway salesman)

But doing computer mods in my past was always with someone along the lines of 'are you sure you want to do this''wtf did we do wrong i can't get it back together'...and of course the classic ' well that did not work well at all..... we needed a new (? put device here) anyway I guess...er hand me another beer (we used that a lot)

Its not the KNC junk that bugs me on these projects..its the lack of the cooperative effort of others to get around such..ie locally here with the shared crypto viewpoint......so far out in the crypto sticks I am!

here you go searing   --   mineral oil cooled mining rig

https://www.youtube.com/watch?v=EpNERMxvPTk&feature=player_embedded

this actually might be feasible

-- run main supply & return tubing to an automotive radiator
-- put a larger circulator pump in the main loop to keep the oil moving
-- use a smaller pump for each cooling tank that taps into the main supply & return
-- set the PSU's above the tank on a rack
-- move the radiator outdoor in summer & indoor in winter

other videos show the psu in the mineral oil too, but that'd take a lot more work and  larger tanks.

I wonder how many cubes one radiator could handle?

Looking forward to the update!

In regards to auto-tune, that's a good idea. I've done the tuning myself manually, also aiming to have no more than 1% HW errors per die. Once that's dialed in, I leave putty connected in screen to monitor for bfgminer restarts due to dies being un-restartable with your watchdog. When that happens, I bump the offending die's voltage a notch until it's completely stable. That leaves me with a 100% stable Titan at the lowest power consumption possible.

Here's what that looks like:



That's mining on nicehash in case you're wondering.