Lightfoot

Not sure it is worth it to try. Cost and otherwise to send you this cube.



BUT have a KNC 'supposedly' 'unrepairable' 2 dies' titan cube. When kNC got swamp'd with RMA's they gave folk a 'choice' of taking 2 1/2 working cubes
to replace one fully NOT working RMA cube sent in. OR you could wait as they 'nicely' put it 4-6 weeks MAYBE get a new fully working cube.

(really got to hand it to these guys..just typing this they can still piss me off)

anyway it is DOWN to one working die at 325mh. If you want the challenge and it don't cost too much. I can send it to you for bragging rights. Bet you could fix it

bet they did not even try back at that point of time on the 'swamp of' RMA returned cubes them first couple of months....back in the day of 2014.

Say a RMA  Cube with 2 working dies comes in for replacement likely went right out the door in
the above 2 for one deal on a different RMA ..bingo bango.....(ah...KNC evil sure works)

anyway just thought you'd get a hoot out of this

CRAP! Short summary, may be unstable after powering down and up. There may be a reason they disabled the dies. That's why testing includes powering everything down for 4 hours then a restart and retest before shipping :-)

Ug. Crap crap crap crap crap.

This next release ...... soon to become a reality!!!!!! woohoo =)
Final touches are in testing, hopefully no major bugs!

ah crap....as I sit here looking at the following parts

raspberry pi B+ 512mb

titan clone bridge (thanks qberty)

my knc Jupiter 550gh Nov 2013 4 port card with beagle bone still attached (must come off)

my Titan LCD gizmo from the 6 port Titan setup

the replacement (free) (new even) Corsair ax 1200i PSU from my 15 month RMA'd one that was 'fading' again
impressed with Corsair ..they could have refused warranty on 1) not ul listed equip and/or too exotic 2) normal
wear an tear on an titan ASIC 24/7 is not normal use....told them the truth even..they sent me new one w/o a
squeak)

my 1 die working Titan cube (30 ltc) I got to try NOT to blow up for this purpose

so heck if you get that new glen tarkin firmware out etc etc...I will then be 'compelled' to put this all
together and see if it works....(been stalling ...I'm a coward)

oh well.....at least I have the 'comfort' of ....if this works ...I will have brought forth .. a NEW evil KNC product
of the Titan variety...bruahahaha .... great we can MAYBE if this works 'spawn' new (I blame Qberty he was first
with the cloned titan board ) using Controller boards from
Jupiter/Saturn/Mercury/Neptune boards from day one to day last that were made to our 'evil' purposes

(digs out Voodoo for Dummies book....orders 5 gallon bucket of chicken entrails'  best to be prepared to 'appease'
the dark forces of this project I shall attempt


but again your firmware comes out I can no longer stall

alas 'evil' never waits

pics shall be made available of

1) the fire damage/carnage etc (likely)

2) a working 'evil' newly hatched Titan Controller

sheesh I have to get out more

er oops....it would be nice if you could just change your name to that...less hassle in that I will likely 'finger flub' your
name in the future...just saying

I used IBM 2880W w/ Finksy/J4bberwock board for months until I shipped the 2880W PSUs to a hosting place. I used J4bberwock 12V to 5V converter so ATX PSU wasn't needed. I now power each Titan with EVGA 1600W PSU, no issues for the last 2-3 months.

EVGA T2 and P2 are more efficient, IBM 2980W should be on par with the P2 w/o the fan pack, but you need fans to run 2980W PSU. My PDU shows 1 less amp after switching from 2 2880W to 1 EVGA T2 and 2 P2s for 3 Titans. I got the converter from Finksy, contact him to see if he has any left.

Not sure about 2000W PSU efficiency but I am sure somebody with info will chime in. I have IBM 2880, 2980 and 2000W server PSUs, only 2980W has platinum logo.

By the way, when you melt the connector to the point where the board burns it's a bitch on wheels to fix.

Melting is caused by a couple of things. When you plug a miner in while the power is on, there is a little spark that happens because the miner's 12 volt caps are charging up from zero. Each spark leaves a nice pock mark on the plug or socket. Eventually that causes resistance which causes heat which causes more resistance.

The other issue is voltage. The cube is going to take a certain number of watts. When you start lowering th voltage below 12v due to cheap cabling, the current draw has to go up. Current is what generates heat in voltage drop situations (P=IE), so when you voltage drops to 10v the thing is now dropping 2v*20a=40w of heat along that line. Then it gets hotter resistance goes up, hilarity ensues.

Third thing is the interconnections between the PCIe connector and the Titan board, if you look at the ground lines on layer 1 and 6 you see that the PCIe pin goes to a via which connects to a very small set of four spider connectors to the ground plane. They do the same thing with +12, it's only a few mm, but as you heat up those pins you will start to burn out those spiders. Once one pin's spiders go the other spiders have to carry more of the load which burns those pins and you know where this leads.

Solution? You could run a supply with a massive amount of power, but remember those cubes don't have fuses in them so if something like a FET shorts inside a power supply you go from a simple *pop* to what could nicely be described as a small plasma fireball (see Amp Interrupt rating). This can then cause the phenolic on the board itself to conduct which will turn your unit into a 3,000 watt electric dryer in a 1 foot cube. This could then be described as "hilarious".

Or try dropping down the power. These units hash nicely at 60mh, do you really need 80+?