Just saw the below linked video on youtube of a guy tearing apart a Titan Cube. It is however all in Swedish.

 The only reason I'm considering doing the same is after seeing the video and the compressed air cleaning of the cube he did. It got me to thinkin g so I looked inside
 my Titan cubes (Both are Nov 2014 units my original one has been running 24/7 since Nov 6th 2014) and they are filthy

 So at the very least I should take them apart and get the dust out of them soonest.

 So as long as I'm doing such a tear down for the compressed air cleaning and such. (Both Titans are Nov 2014 units...even the 2nd used one) I figure I may as
 well go whole hog and see/replace the thermal paste as is done in the video and the modest heat sink mods.

 But as it is in Swedish I have a few questions.

 1) Taking it apart and the compressed air cleaning aside. What is it he uses to wipe off the thermal grease on the ASIC chip  once the heat sink is off and clean with?
 Is that simply isotopic alcohol (ie rubbing alcohol) or some other solvent?

 2) What Thermal Grease used for CPU's do you all recommend one uses for these up to 100c Asic Chips as a replacement thermal paste?
 Is it above and beyond what would be needed for the old CPU thermal paste stuff from back in the day? ie a certain type based on chip temp or some such?

 3) What size are these mini-copper heat sinks he uses in his modest mod? Does anyone know off hand? I'd only like to take apart the cube/dust it out/make the mod
     for the heat sinks and add the thermal paste in one go if at all possible.
     Trying to avoid just opening it up and getting the heat sink sizes and dust it out....trying to got that extra step and  be brave to follow thru on thru thermal paste
     replacement as well (I have 2 bad dies on 2 cubes I could get lucky on some better thermal paste application after
     almost 1 year of operation ..maybe it was mis-applied on those chips/cubes with the 1 bad die each? (then again I could brick the works).


  Anyway what do you think? Worth doing with a very dusty cube. or if they run well (8 cubes 650mh for 11.5 months) or don't do squat? KNC Titans are evil and will turn
  on your surely should you try?


   The link of the tear down is below. Anyone speaking Swedish (I think it is) please feel free to translate should you wish on the above points should they come up please.

  (Should never have looked into a cube and saw the dust...see what you get yourself into by doing such)

https://www.youtube.com/watch?v=O-RBI4am-wY


Thanks for the help.



 

Against my pool and custom titan ports, that worked out to be the best and most efficient config. It's been a while since I did the testing on that but I found my stratum was not accepting stale shares anyway so it was a waste of resources on both ends.

Gentarkin, I have a request. Power readings in the advanced page are way off. It isn't even close! If I get you a proper reading of how many watts a cube consumes at 325MHx and -0.0366v would you be able to adjust them? Also, would be great to have the ability to set our own Wall efficiency. I'm running 94% efficiency PSUs, so 85% is no where near accurate.

Get me some readings at wall, and screenshots of the page. Ill see what I can do =)

I dont know about being adjustable because not everyone will be able to adjust, its more supposed to be just a guesstimate, not a concrete figure. I cant account for everyones setup.
But, perhaps Ill put in a one time adjustment box, once set it will go away. Im trying to keep the gui as clutterless as possible.

I asked for readings from people when I started adding the wall watts code ... noone posted anything. So, I just took a pure guess and said fuck it! LOL!

CHRIST MAN!!!! There is NO WAY those PSU's are as effecient as you think! LOL!!! Thats some insane power usage!
My Titan is on like 90% EFF ATX PSU's  x2, and it only draws 1500w @ the wall, all cores @ 325mhz!

NOTE: I cant do anything about what the cube "thinks" its drawing, after all those are the actual numbers as reported from the DCDC's. Thats about as close to any true measurement your gonna get from the device, everything else is guesswork.

Now, I think you can see why ... its really hard to account for everyones setup =P ... we have a HUGE difference in power usage, but only a 4% claimed difference in PSU EFF =P

NOTE: you dont use my DCDC temp protection? =(  hehe

OOOHHHH! 5 cubes!!! well now that makes more sense ROFL!
Can you get me a screenshot of all cubes listed on that page?

If you can get more concrete numbers regarding each cubes actual usage @ the PSU ... if they are using more than what the DCDC reports then its obvious the DCDC reports its actual draw by the ASICs but is not taking into account the DCDC's own effeciency. So, I may be able to code in an effeciency compensation for the per cube power consumption then maybe the "measured" watts will be more accurate and subsequently the wall watts.

I'm out running errands right now, I'll get you the measurements in a few hours. 

I think you're a little behind on the news LOL! It's (I thought so anyways) well known that both Neptune and Titan cubes pull approximately 360w to 400w from that poor PCI-e connector. A 6 pin PCI-e connector is rated at 75w and an 8 pin is rated at 150w. I'm not sure why, since all it does is add 2 ground wires while only leaving 3 12v wires. Where did you get the 275w figure from a 6 pin from?

WOW! 360w?!?!?! ARE YOU SHITTING ME?! I wanna see ur measurements ASAP =) haha
naw, the 6 pin PCIE is rated 75 & 8 pin rated 150w for PC applications, its the standard in the video card PC industry. But its not necessarily the max of the CONNECTOR(not the cable) itself. The wire gauging used by PC PSU manufacturers puts the 75/150w limit on the PCIe power cable connector overall because some PSU manufacturers use way too thin of a guage of wire to safely sustain the connectors rated max.
Molex.com has CURRENT ratings for the 6pin PCIE connector.
http://www.molex.com/molex/products/family?key=megafit_power_connectors&channel=products&chanName=family&pageTitle=Introduction&parentKey=power_connectors

23A * 12V = 276W, I round it to 275 for ease of remembering =P


ALSO, I just stumbled across something else, the other missing piece of the puzzler perhaps.
If Im thikning about this correctly, power dissipation would be additional to the effeciency rating of these DCDC's?
If so then thats another 5w added to the power needs of each DCDC, so its roughly 85% eff + 5w PER DCDC, thats 8 DCDC's per cube, which translates into another 40watts used per cube on top of the 85% eff... HOLY SHITBALLS!

Or is the dissipation part of the effeciency metric? I dont know, in the docs it shows 2 seperate graphs , 1 for effeciency at given current/voltage and another graph for power dissipation for given current voltage.