Guys we are on our own as far as firmware updates. We are so fortunate to have someone that can help us. I have donated some BTC , but if you want this development to continue , then please donate. I LOVE the 85C cutoff for the vrms as they should NEVER get this hot and if they do, and run this way or hotter, they will eventually burn up. Nice work Tarkin!! I have made major improvements on the hardware to reduce the heat as much as possible. I will be offering my service to the public in the next few weeks. This is a pic of one of my cubes that has all my mods. There are 7 different mods that needs to be done to achieve this, and its nothing I will discuss here, youll have to send in your cube for repair and mods. Or I can offer a package price for multiple working cubes for just mods.
This is a cube with all the completed mods running outside in Las Vegas in over 105F simply to test it under the most brutal circumstances. It has been running for over 12 hours. I set the last 2 dies at 325MHZ on purpose just to see what the temps would be. Here are the results:
![](https://ip.bitcointalk.org/?u=http%3A%2F%2Fs17.postimg.org%2Fy41trjp9r%2Flow_temp_vrm.jpg&t=665&c=fT6dJSF1zDBmag)
To my knowledge I am the only person who is not only able to repair these , but also at the same time get such low temps. The vrm temps is what kills the dies. When this is prevented, your cubes will last 100X longer. I would strongly urge anyone to have me perform these mods BEFORE your dies burn up, especially if your vrm temps (to the far right) are running at 80C, its just a matter of time.
Here is the link to my website in case you want these mods applied. I will also make a video soon and post it on youtube for any doubters. These hardware mods work VERY well with the firmware from GenTarkin.
http://bitcoinlasvegas.net/kncminer-titan-repair-knc-miner-repair-titan-repair-kncminer-fix/Vegas
hmmm.... In the case of my 2 titan(s) I do have 2 cubes with 1 die dead on each cube (been that way almost from day one) as to the heat and vrm stuff ..in my bsmt on hot days it can get between 85-90c for say 8 vrms out of the 8 cubes I have .....have not had an issue....was running hotter then that on some even in the this summer before as i show below made some tweaks in speed....so in my case I don't have any issues with heat (since accidentally shutting windows in basement from a storm on a hot day) till I get around 95c or so and 2 started to dump at 100c but again windows were closed and fans off and i forgot to open and restart the fans in the window....one way to 'accidentially' stress test your titans
![Sad](https://bitcointalk.org/Smileys/default/sad.gif)
anyway my vrms range on 90F in my basement between 85-90c for say the 6 at worse offenders to get to be 90F in my basement it is 100F outside
thus a more cost effective method on 100F days (if i get any upper midwest usa) is just shut the miner down for that day..so again if you are in my kinda
climate you can work around this w/o the expense of a/c and or 400 buck mods
so anyway from the above I take your point. you have less stable cubes that cut out etc you may very well have need of services you offer...but never underestimate
the power of a cool basement and moving a hell of a lot of air....I have also tried to force fans into cubes to move air out directly it worked badly ..and did not really change vrm temp much
did cause them to be erratic as hell so I took the heat for stability and less errors currently rarely have any issues and not a lot of up/down etc on the mining for peaks/valleys etc
As you can see from the below pic of my setup and further pics below on the imgur link ... my setup as you can see heat rises blower fan at other end of basement (both fans on 24/7 full out) moves air in ...the hot air rises and the shutter fan as you can see in my pics moves it out ..the heat rises naturally (again tried fans etc just seems to work better this way) up into that corner and viola out it goes but then again I'm moving a lot of air thru the basement as well ..as to the pusher fans and the exhaust fan that is 20 bucks total for both in elec at 13c kwh full out 24/7..a month it comes out too..well worth the money..should you have no a/c and a basement as is my case for mining
.so in my case just moving the air is working w/o a lot of other tweaks or a/c...and again 3 ft from my ceiling you are looking at a 24/7 15mph breeze at worse
![Smiley](https://bitcointalk.org/Smileys/default/smiley.gif)
Also remember this is the heat for TWO Titans or 2500 watts 24/7 your results would be much better with only 1 titan unit say if you had a basement and fans etc
like my basement the results for heat imho would be more dramatic
http://lostgonzo.imgur.com/![](https://ip.bitcointalk.org/?u=https%3A%2F%2Fi.imgur.com%2FjHkdGnd.jpg&t=665&c=iy8t-JBuDAMdOw)
i did clock down the 2 hottest dies to 300mh from 325mh ..one at 1 click below the standard 300mh voltage setting the other at the 300mh voltage setting all other settings at 325
except for the off cubes at the standard voltage that knc came at for 300mh took 10c off the vrms.... so all at 80F in the basement run no more then 86c at that temp in bsmt
that was needed as summer arrived ..i imagine in sept i can kick it back up with out any vrm heat issues again in that it ran well at maxed out..but settings all winter
toggle the speed down and drop the heat...that seems to be effective enough...move a hell of a lot of air above the titan(s) 24/7 in and out is the biggest plus imho
i also tried your fans directly into cubes and or small usb fans blowing into cubes etc...again more stable just letting the air naturally rise and then 3 ft from the ceiling between the
pusher fan and the slated exhaust fan pushing out above the titans it is like a 15 mph breeze 24/7 LOL
![Smiley](https://bitcointalk.org/Smileys/default/smiley.gif)
Some of this may be due to my 6 cube and 2 cube unit (saved me
from getting 2 more corsair 1200i's with 2nd used titan) but to repeat ..the cube pushing air out pretty well the rather prompt heat rise to the ceiling and the immediate
pushing of air in and out of the basement seems to do the trick
Winter is coming....but this was the advice I was given ..was repeatedly told needed a/c in basement and or fans in front of cubes etc...then one guy said you just need to
get the heat out ..the basement will take care of the rest compared to outside temps.....so far he has been completely correct ..especially in that I have 2x the heat of a
normal titan unit to move
good luck on your service..but for those just dealing with this for the summer you may want to try my method or even more creative a complete ducting setup above your
titan with round ducting and blast the heat directly out from the get go
I am sure your service will be very valuable for those cubes more damaged then mine with restart/worse dies and heat issues
as to my 2 dead dies...as crappy as knc made the stuff and most nov 2013 folk i know who got titans have a die or two dead anyway (thus the batch) the fact
I'm getting 650.1mh with 2 dead dies and 1 cube only set to 312.5 vs 325 is a frigging miracle imho ..just gonna go with the flow...frigging miracle they are doing
that cheap raspberry pi kiddie science projects that the titans are imho they so over clocked this titans anyway 50.1mh above 300mh and the fact the titans
have lasted this long is well again miraculous imho
![Smiley](https://bitcointalk.org/Smileys/default/smiley.gif)
now as i write this I may have jinxed myself and blew a cube and will need your services...but anyway the above advice was given to me on how to move air
with two titans w/o a/c or too weird of tricks..so just passing it forward
![Smiley](https://bitcointalk.org/Smileys/default/smiley.gif)
For those with less options no basement or worse equipment this is not gonna help
much but again w/o the guys advice on how to move air in my basement and using an a/c unit I may have had the same results ..but at the cost of 250 usd
more for the a/c at least a month imho
also my motto works with knc titans 'get what you can' w/o getting too obsessed with speed dead dies etc.....these units were orig only on warranty for 3 months
thus that was knc's thoughts on how long they would last.... my units the used and new both nov units have been going 24/7 for 9+ months ..you have issues with
heat for a couple months adjust your expectations....ask around for stuff like I have done or the full out ducting etc....but eventually they will 'poop' out it is how
the knc stuff was made imho
anyway what I'm doing wrong/right or who the f*ck knows
![Smiley](https://bitcointalk.org/Smileys/default/smiley.gif)