Swedish ASIC miner company kncminer.com

[lemonte]

Ah...erm ok then, forget the news about...

would be great timing to hear about their next gen now..  any ballpark specs would be a feast for the eyes

Indeed, it would keep CMMpro happy, but alas, I fear Lemonte not so much...

Hahaha, it would be great news really! Would just make me very jealous. Then again, if you offer the reseller scheme on the 2nd generation, happy days!

[E]

tl;dr: Plug your power supply cables directly into KnC modules to increase system efficiency.


Folks,

I was poking around the inside of a Saturn->Jupiter miner, measuring the 12V supply on the modules themselves.
With a supply voltage of 11.93V at the PSU, I was seeing 11.5V at the modules!

Examining things further, I noticed that the nice quality blue PCIe extension cables KnC supplied are only 20AWG (0.52mm^2).
This plus the resistance at the couplings is wasting a significant amount of power:

Module Power ~150W @ 11.5V = 13.04A (20AWG has rated ampacity of 11A in free air, btw)
Vcable=0.43V
Power loss in cable = 13.04A * 0.43V = ~5.6W

Plugging the PSU cables directly into the modules I measured around 11.85V. So:

150W / 11.85V = 12.66A
Vcable = 0.08V
Power loss in cable = 12.66A * 0.08V = ~1.0W.

So we have a percentage loss of:

100 * 5.6W / (150W + 5.6W) = 3.6% versus
100 * 1.0W / (150W + 1.0W) = 0.6%

When you consider how much a 3% increase in efficiency costs at the PSU level, the recommended course of action is obvious

E

[CYPER]

I'm being realistic, which is "having or showing a sensible and practical idea of what can be achieved or expected."

were you terrible at sports as a child??   I imagine you getting picked last in gym class everyday for some reason.....

No idea how you made a connection between my posts here and my sport achievements as a child 

  just playing armchair quack  -  chin up!!  you are on the winning team with KnC!

cash a BTC and go buy a nice watch or something  

Yes, I am happy being on the KNC team
I just don't understand how Bitcoinorama expects people to be optimistic/happy/excited about a delay  

[CYPER]

tl;dr: Plug your power supply cables directly into KnC modules to increase system efficiency.


Folks,

I was poking around the inside of a Saturn->Jupiter miner, measuring the 12V supply on the modules themselves.
With a supply voltage of 11.93V at the PSU, I was seeing 11.5V at the modules!

Examining things further, I noticed that the nice quality blue PCIe extension cables KnC supplied are only 20AWG (0.52mm^2).
This plus the resistance at the couplings is wasting a significant amount of power:

Module Power ~150W @ 11.5V = 13.04A (20AWG has rated ampacity of 11A in free air, btw)
Vcable=0.43V
Power loss in cable = 13.04A * 0.43V = ~5.6W

Plugging the PSU cables directly into the modules I measured around 11.85V. So:

150W / 11.85V = 12.66A
Vcable = 0.08V
Power loss in cable = 12.66A * 0.08V = ~1.0W.

So we have a percentage loss of:

100 * 5.6W / (150W + 5.6W) = 3.6% versus
100 * 1.0W / (150W + 1.0W) = 0.6%

When you consider how much a 3% increase in efficiency costs at the PSU level, the recommended course of action is obvious

E

If the blue cables are 20AWG do you have an explanation why PSU cables which are 18AWG get warmer, than the blue ones?
How did you establish they are 20AWG? Mine has no writing on them.

[CeeCee]

i have replace my cgminer binary with the cgminer-tune binary. renamed it and set the rights to 755. then /etc/init.d/cgminer.sh restart. till here everything fine. but after a reboot it seems that the binary gets replaced again by 3.8.1 . any way for a permanent replacement?

[E]

tl;dr: Plug your power supply cables directly into KnC modules to increase system efficiency.


Folks,

I was poking around the inside of a Saturn->Jupiter miner, measuring the 12V supply on the modules themselves.
With a supply voltage of 11.93V at the PSU, I was seeing 11.5V at the modules!

Examining things further, I noticed that the nice quality blue PCIe extension cables KnC supplied are only 20AWG (0.52mm^2).
This plus the resistance at the couplings is wasting a significant amount of power:

Module Power ~150W @ 11.5V = 13.04A (20AWG has rated ampacity of 11A in free air, btw)
Vcable=0.43V
Power loss in cable = 13.04A * 0.43V = ~5.6W

Plugging the PSU cables directly into the modules I measured around 11.85V. So:

150W / 11.85V = 12.66A
Vcable = 0.08V
Power loss in cable = 12.66A * 0.08V = ~1.0W.

So we have a percentage loss of:

100 * 5.6W / (150W + 5.6W) = 3.6% versus
100 * 1.0W / (150W + 1.0W) = 0.6%

When you consider how much a 3% increase in efficiency costs at the PSU level, the recommended course of action is obvious

E

If the blue cables are 20AWG do you have an explanation why PSU cables which are 18AWG get warmer, than the blue ones?
How did you establish they are 20AWG? Mine has no writing on them.

The writing is embossed, and hard to read; I'll try to get a photo of mine. PSU cables may be warmer due to several factors:

- Airflow in case around blue wires (just a few watts per cable means very easy to cool w/ tiny airflow)
- Conduction of heat from PSU components along wire
- ?


I think that the extra plug junction is just as big a factor as the thin wires, however - my plugs at the PSU/Blue Cable interface were noticeably warm even after deox.

[Bitcoinorama]

I'm being realistic, which is "having or showing a sensible and practical idea of what can be achieved or expected."

were you terrible at sports as a child??   I imagine you getting picked last in gym class everyday for some reason.....

No idea how you made a connection between my posts here and my sport achievements as a child 

  just playing armchair quack  -  chin up!!  you are on the winning team with KnC!

cash a BTC and go buy a nice watch or something  

Yes, I am happy being on the KNC team
I just don't understand how Bitcoinorama expects people to be optimistic/happy/excited about a delay  

There has been no delay from what I've seen I've only ever known Marcus state production commences mid November and he's the guy in charge of production. Fact is PCBs were finalised and being produced at the time you were here which is mid Nov, fingers x'd you get your kit this week.

I've only ever said production commences mid-November.

[CYPER]

There has been no delay from what I've seen I've only ever known Marcus state production commences mid November and he's the guy in charge of production. Fact is PCBs were finalised and being produced at the time you were here which is mid Nov.

By delay I mean this:



turning into this:

fingers x'd you get your kit this week.

If that happens and all miners get shipped in November I promise you to apologize for being so negative about the "November shipping"
But I am being realistic and don't expect my miners to be shipped before December and that is why I am not as excited as you expect

[Tigggger]

Where is that screen capture from I've only ever seen it say November (and it still does on my screen)

[Bitcoinorama]

Where is that screen capture from I've only ever seen it say November (and it still does on my screen)

That's Cyper's handiwork, it doesn't say that on site...

[Biffa]

Where is that screen capture from I've only ever seen it say November (and it still does on my screen)

That's Cyper's handiwork, it doesn't say that on site...

To be fair, my screen says "Jupiter November shipping - SOLD OUT"

[CYPER]

Where is that screen capture from I've only ever seen it say November (and it still does on my screen)

That's Cyper's handiwork, it doesn't say that on site...

Correct

I can only dream of the moment when ASIC manufacturers would advertise a November shipping and actually start shipping first half of the month.
These will be glorious times  

[CYPER]

Where is that screen capture from I've only ever seen it say November (and it still does on my screen)

That's Cyper's handiwork, it doesn't say that on site...

To be fair, my screen says "Jupiter November shipping - SOLD OUT"

Mine too.
I was just pointing out that November shipping will probably not happen for some people.
I hope I am wrong though  

[Phoenix1969]

tl;dr: Plug your power supply cables directly into KnC modules to increase system efficiency.


Folks,

I was poking around the inside of a Saturn->Jupiter miner, measuring the 12V supply on the modules themselves.
With a supply voltage of 11.93V at the PSU, I was seeing 11.5V at the modules!

Examining things further, I noticed that the nice quality blue PCIe extension cables KnC supplied are only 20AWG (0.52mm^2).
This plus the resistance at the couplings is wasting a significant amount of power:

Module Power ~150W @ 11.5V = 13.04A (20AWG has rated ampacity of 11A in free air, btw)
Vcable=0.43V
Power loss in cable = 13.04A * 0.43V = ~5.6W

Plugging the PSU cables directly into the modules I measured around 11.85V. So:

150W / 11.85V = 12.66A
Vcable = 0.08V
Power loss in cable = 12.66A * 0.08V = ~1.0W.

So we have a percentage loss of:

100 * 5.6W / (150W + 5.6W) = 3.6% versus
100 * 1.0W / (150W + 1.0W) = 0.6%

When you consider how much a 3% increase in efficiency costs at the PSU level, the recommended course of action is obvious

E

*Thank you for this post. - confirming what some of us suspected... and removed those long ago....  but certainly still noteworthy to noobs & people who missed it...
Power counts significantly.

on a "related" matter... I noticed that my 65-75 temp range may not be the "Sweet-spot"..and I'm NOT suggesting anyone do this, but I noticed (using Bertmod) the output on the vrm's increases by a noticable rate... from 45-47amps to 50 plus amps OUTPUT per vrm when pushed to 80C.... So I'm testing them all at the moment...
Has anyone had the same result? I'm still waiting for pool results...

[joeventura]

Tuning Suite any time soon?

Now with the team busy on the next production run any chance of us seeing it in the next few weeks?

'Orama please sir?

What is the potential of the suite? Got the gear in the garage now that its cold out, would love to start overclocking it while the weather is favorable. 

Joe it's pretty much ready, it's being tested to male sure range wise it's doesn't compromise your hardware and create RMA hell. As I said before it's a matter of days, not weeks!

WONDERFUL News thanks so much for the reply.

[Biffa]

http://www.ebay.co.uk/itm/KnC-Miner-ASIC-Upgrade-module-for-October-2013-Jupiter-or-Saturn-28nm-IN-HAND-/121220590294?pt=LH_DefaultDomain_0&hash=item1c394f6ad6

[joeventura]

I'm being realistic, which is "having or showing a sensible and practical idea of what can be achieved or expected."

were you terrible at sports as a child??   I imagine you getting picked last in gym class everyday for some reason.....

No idea how you made a connection between my posts here and my sport achievements as a child 

  just playing armchair quack  -  chin up!!  you are on the winning team with KnC!

cash a BTC and go buy a nice watch or something  

Yes, I am happy being on the KNC team
I just don't understand how Bitcoinorama expects people to be optimistic/happy/excited about a delay  

There has been no delay from what I've seen I've only ever known Marcus state production commences mid November and he's the guy in charge of production. Fact is PCBs were finalised and being produced at the time you were here which is mid Nov, fingers x'd you get your kit this week.

I've only ever said production commences mid-November.

And just a word about delays, my UPS Shipped Modules arrived 3 days faster than my DHL shipped gear.

So even though they didn't get shipped the week they were supposed to, the net result was that because UPS was used they went from Sweden to me in the US 3 days faster

Some ASIC vendors actually learn from their mistakes.

Good job KNC!!

[demonmaestro]

Well some help that ya are.


Anyways Phoenix1969 got me set up.
I was having an issue with my miner dropping down to 60GH/s and the temps were around 50c. We looked and had 3 VRMs offline.. i turned off the fans to the case and blocked airflow for the heatsink to raise the tempature. Sure enough once it got to around 60c 3 VRMs were showing and then once it got to 68c it showed all 4 VRMs online and i was back hashing around 140GH/s. so these miners does not like being cold. I have tinkered with 0.98/0.98.1(beta)/0.99 with all the same luck. I am on the beta now.

Thanks again Phoenix1969 for the help. 

[the-skeptic]

Dear KNC,

I am greedy. Please sell me another Jupiter. Thanks.

Seriously, though, is there any idea when KNC will be accepting new oders? I don't care if I'm 2 months away from receiving something, I'd like to spend some of this BTC that's burning a hole in my wallet.

-Dana

[jelin1984]

Is good firmware final the 0.98.1 beta or not?