Swedish ASIC miner company kncminer.com

[The Avenger]

When I fuss with my cardboard and fans, I sometimes get a reboot.  Since I run, at the present, without the top, center cardboard cooling the BBB, a 12v fan sitting inside blowing on the left side of the module, another 12v fan outside the case blowing on the right side of the 1 module (Mercury), I added another piece of cardboard to the right of the BBB, to the side and up to the module, taking the air pushed out the side and directing it to the module.  The miner white light came on and off as I moved the fans, perhaps a loose pin in an added fan connector, but it started again right away.  Put Bertmod back but earlier tried the 0.2.1 and found it works well with firmware 0.90, looked at my cores, which I could with the 0.2.1, and earlier their was a single core not up, but now there are four 100% cores and the BertMod says the power change from adding that one core on firmware 0.90 with ~0.9v to the 4 vmr's, was 174 watts with one core down and 180 watts with all cores running.

Any chance of a few photos? Hard to visualise.

https://docs.google.com/file/d/0B_DLmNkCkkVpZGRTV1NvTzhOMEk/edit?usp=drive_web
https://docs.google.com/file/d/0B_DLmNkCkkVpRDVFTTZ4TGp0MkU/edit?usp=drive_web

Remember, this is just testing conditions and this will be much neater after I figure out what I need to do and button up.  Might take a while to get the connectors to relocate the BBB tho.

Could you take one the other way, looking from the power supply towards the beaglebone? Just wanted to see how you are pushing the air down on the BBB.

All you'll see is the cardboard tucked under the module and tucked under the 90° angle of the front top.  There is a crease in the cardboard.  Unless it's you want me to search the cardboard from some indication that it was what my Jalapeno and broken coffee cup came in?

Now I recall, Avenger, embroiled in heated exchanges.  Are you with BFL?

Excuse me but I've got to get in some running with my dog.  A slow 7+miles RT to a nearby highway I think.

Sheesh, the photos you provided just show chunks of cardboard, I wanted to see how the air was being directed inside from the inlet fan. Forget it.

[Phoenix1969]

at least you can glu the coffe cup back together & use it maybe...lol...what a slap in the meatballs...

[soy]

Remember, this is just testing conditions and this will be much neater after I figure out what I need to do and button up.  Might take a while to get the connectors to relocate the BBB tho.

 KnC 0: | 171.1G/136.0Gh/s | A:77511 R:6588 HW:6205 WU:2187.4/m

The one core that was down came back on and all 4 at 100%. 

if you are going to do all that, drop the heatsink fans to the crossbar.  you'll be amazed on the drop in temp

I don't quite understand what you mean.  Your heatsink fans seem positioned same as mine although my single module is up front right.

[DPoS]

Sheesh, the photos you provided just show chunks of cardboard, I wanted to see how the air was being directed inside from the inlet fan. Forget it.

just put a small fan on the outside by the ethernet cable pointing in for airflow under the beagleboard

[soy]

at least you can glu the coffe cup back together & use it maybe...lol...what a slap in the meatballs...

No, the broken cup is gone.  Trying not to dwell on that.  It's unhealthy.

[Phoenix1969]

at least you can glu the coffe cup back together & use it maybe...lol...what a slap in the meatballs...

No, the broken cup is gone.  Trying not to dwell on that.  It's unhealthy.

ROFL    I feel ya bro...

[soy]

When I fuss with my cardboard and fans, I sometimes get a reboot.  Since I run, at the present, without the top, center cardboard cooling the BBB, a 12v fan sitting inside blowing on the left side of the module, another 12v fan outside the case blowing on the right side of the 1 module (Mercury), I added another piece of cardboard to the right of the BBB, to the side and up to the module, taking the air pushed out the side and directing it to the module.  The miner white light came on and off as I moved the fans, perhaps a loose pin in an added fan connector, but it started again right away.  Put Bertmod back but earlier tried the 0.2.1 and found it works well with firmware 0.90, looked at my cores, which I could with the 0.2.1, and earlier their was a single core not up, but now there are four 100% cores and the BertMod says the power change from adding that one core on firmware 0.90 with ~0.9v to the 4 vmr's, was 174 watts with one core down and 180 watts with all cores running.

Any chance of a few photos? Hard to visualise.

https://docs.google.com/file/d/0B_DLmNkCkkVpZGRTV1NvTzhOMEk/edit?usp=drive_web
https://docs.google.com/file/d/0B_DLmNkCkkVpRDVFTTZ4TGp0MkU/edit?usp=drive_web

Remember, this is just testing conditions and this will be much neater after I figure out what I need to do and button up.  Might take a while to get the connectors to relocate the BBB tho.

Could you take one the other way, looking from the power supply towards the beaglebone? Just wanted to see how you are pushing the air down on the BBB.

All you'll see is the cardboard tucked under the module and tucked under the 90° angle of the front top.  There is a crease in the cardboard.  Unless it's you want me to search the cardboard from some indication that it was what my Jalapeno and broken coffee cup came in?

Now I recall, Avenger, embroiled in heated exchanges.  Are you with BFL?

Excuse me but I've got to get in some running with my dog.  A slow 7+miles RT to a nearby highway I think.

Sheesh, the photos you provided just show chunks of cardboard, I wanted to see how the air was being directed inside from the inlet fan. Forget it.

Look, the cardboard goes from the metal bottom to the angled edge of the front.  Air pushed in by the front fans can only go out the sides but pushes down on the BBB at the same time.  Experiment.  If you're not running a Mercury then my arrangement ain't best for you.

Ha! New high avg hashrate:  KnC 0:  | 163.9G/137.2Gh/s | A:133086 R:10263 HW:10757 WU:2191.8/m

[timmmers]

Seriously? Fucking about with bits of cardboard in a multi thousand rig that's days old?

Mine arrives needing shit like that they will get it back, I paid for a working miner capable of a certain hashrate and anything less is not acceptable.
IT should have been here a fucking week ago too.

Read the site, what they are selling. That is what you should get. Simple as that. They don't deliver that, they are at fault.
You fucking about with it makes it vulnerable to them claiming you are out of warranty. Be careful.

[Phoenix1969]

Seriously? Fucking about with bits of cardboard in a multi thousand rig that's days old?

Mine arrives needing shit like that they will get it back, I paid for a working miner capable of a certain hashrate and anything less is not acceptable.
IT should have been here a fucking week ago too.

Read the site, what they are selling. That is what you should get. Simple as that. They don't deliver that, they are at fault.
You fucking about with it makes it vulnerable to them claiming you are out of warranty. Be careful.

I for one appreciate any tweaks & quirks anyone shares...
knowledge & feedback from customers at this stage is critical
If you are in this game, you need to learn how to share information instead of bashing every little comment, and the profanity really isn't needed either.

[Micky25]

with the original 0.95 firmware.

glad we could be testbeds for you!!   I'm happy with my early coins but do have one limp miner to nurse now. Glad the other one had a bit more constitution

it's beyond my comprehension why major bitcoin mining software developers got their test-rigs only one week ago. Additionally, the biggest pre 0.95 bugs seem to got fixed by a customer.
And still the Jupiter gets me the most rejects of all my miners. I'm really looking forward to a ckolivas release...

[1l1l11ll1l]

Seriously? Fucking about with bits of cardboard in a multi thousand rig that's days old?

Mine arrives needing shit like that they will get it back, I paid for a working miner capable of a certain hashrate and anything less is not acceptable.
IT should have been here a fucking week ago too.

Read the site, what they are selling. That is what you should get. Simple as that. They don't deliver that, they are at fault.
You fucking about with it makes it vulnerable to them claiming you are out of warranty. Be careful.

Just fine tuning things, I'm sure yours will work just fine when it arrives, and you can just leave it running how it came, no one said you need to tweak it for extra performance.

[The Avenger]

I think tweaking will be necessary to get the best performance and people sharing their mods is useful so we don't have to reinvent the wheel.

From the thermal imaging photos and user experiment's, it's beginning to look like the VRM's are in a sub-optimum position. According to the spec sheet, the cooling airflow should be directed like this (thanks to Bitbuster for jpg):



As the VRMS are mounted parallel to the edge of the case, I imagine very little cool air in getting down in there and certainly the air is not being directed the way it is required to keep them optimally cool. To make things worse in the Jupiter, the late addition baffles added to the case are probably pushing hot air in that direction.

No wonder people who have experimented, (like the photos posted by trepex & soy), have put fans on either side, blowing directly into the VRMs and this seems to improve the situation.

Not sure anyone has been able to do this with a jupiter, as there wouldn't be space to sit fans on each side. It seems the way jupiter owners have handled this is to sit a massive box fan on top of the miner blasting air downwards to cool.

And the other thermal image photo shows that the beaglebone get's hot. I wouldn't have been able to guess it needed a bit of extra cooling without someone sharing their research.

So keep up the experiments guys, it's interesting for us all until we get our own units to play with.

[edgar]

Seriously? Fucking about with bits of cardboard in a multi thousand rig that's days old?

Mine arrives needing shit like that they will get it back, I paid for a working miner capable of a certain hashrate and anything less is not acceptable.
IT should have been here a fucking week ago too.

Read the site, what they are selling. That is what you should get. Simple as that. They don't deliver that, they are at fault.
You fucking about with it makes it vulnerable to them claiming you are out of warranty. Be careful.

if you have to go what ive just been through.....

hours and hours of fail - to do what should take seconds....plug.......n......................
...
...
...
...pplay!

Massive shout out to pZombie - Really REALLY went the extra MILES!!.


jupiter   535.50 GH/s   410112 (89.85%)          512 / 1536 / 45824(massive 'others')   0:00:08

[josh_nc]

Seriously? Fucking about with bits of cardboard in a multi thousand rig that's days old?

Mine arrives needing shit like that they will get it back, I paid for a working miner capable of a certain hashrate and anything less is not acceptable.
IT should have been here a fucking week ago too.

Read the site, what they are selling. That is what you should get. Simple as that. They don't deliver that, they are at fault.
You fucking about with it makes it vulnerable to them claiming you are out of warranty. Be careful.

I started out pre-ordering from BFL then got my refund as I thought it was a racket. Next was a couple of asicminer blades (12GH/s each). Very intense maintenance but I enjoyed them but made no profit. They did deliver them fast although they were relatively expensive and not very advanced or as fast to keep up with the difficulty rise at the time.

Next an Avalon batch#3. Sofisticated and relatively advanced, nice equipment but I lost money on it with all the delays. Now KNC Jupiter. Already lost the race, I think. Unless the BTC keeps going steadily up I will likely sell it within a month and perhaps recover my overall 3000.00 loss so far. Still pondering what to do because of this recent rise on the BTC due to Asia which could be extremely meaningful for the future of BTC.

So, my conclusion is that there seems to be an inherent mathematical impossibility regarding ROI in BTC because we would need a quickly delivered, fast hashing, way ahead of current difficulty needs, reasonably priced unit we could quickly buy additional modules ahead of time to keep up with the steeper difficutly increases. However, only the people that get them first would have a good return, everyone else would still likely lose in BTC. In paper currency, it all depends. You may gain or lose depending on how the wind is blowing, if the USD doesn't crash before you make any return! So, enjoy the rollercoaster ride. No one knows what lies ahead of the next curve and it may derail at any time!

Someone said a while back that during the Eldorado gold rush those who sold the shovels made a fortune. Most people lost their skin.

J/

[Micky25]

soon, in the not so far future, all these problems will be moot

[ur0pl]

Okay nothing work, so now i tried to do what someone else said with downgrade to .90, power cycle, run enable cores, power cycle, upgrade to fw. .96. So far I went through one cycle of many enable cores back from disable and then some going to disable again. SO, maybe it works now. I really hope this fixes it.

Also, i tried connecting only one hashboard at a time, and i got the same error of hashing going to 2 Mb/s after an enable core disable core cycle.

I hope this new try works.

[josh_nc]

Okay nothing work, so now i tried to do what someone else said with downgrade to .90, power cycle, run enable cores, power cycle, upgrade to fw. .96. So far I went through one cycle of many enable cores back from disable and then some going to disable again. SO, maybe it works now. I really hope this fixes it.

Also, i tried connecting only one hashboard at a time, and i got the same error of hashing going to 2 Mb/s after an enable core disable core cycle.

I hope this new try works.

Hey, go lie down and jack off. You're too stressed! It's still Sunday. 

[jelin1984]

Does anyone install ram heatsink at vrms?

[trepex]

I think tweaking will be necessary to get the best performance and people sharing their mods is useful so we don't have to reinvent the wheel.
...
No wonder people who have experimented, (like the photos posted by trepex & soy), have put fans on either side, blowing directly into the VRMs and this seems to improve the situation.
...
And the other thermal image photo shows that the beaglebone get's hot. I wouldn't have been able to guess it needed a bit of extra cooling without someone sharing their research.

So keep up the experiments guys, it's interesting for us all until we get our own units to play with.

After reading your article (thanks for mentioning me!), I thought I extend my highly professional   cooling
by a 3rd fan.

The last (>1 day) overall stats from cgminer had been at 269Gh/s. It looks like the new setup gives me 5-8Gh/s more. Now
over 275Gh/s  
But that's only short term data, so I will update you tomorrow.

[soy]

When I fuss with my cardboard and fans, I sometimes get a reboot.  Since I run, at the present, without the top, center cardboard cooling the BBB, a 12v fan sitting inside blowing on the left side of the module, another 12v fan outside the case blowing on the right side of the 1 module (Mercury), I added another piece of cardboard to the right of the BBB, to the side and up to the module, taking the air pushed out the side and directing it to the module.  The miner white light came on and off as I moved the fans, perhaps a loose pin in an added fan connector, but it started again right away.  Put Bertmod back but earlier tried the 0.2.1 and found it works well with firmware 0.90, looked at my cores, which I could with the 0.2.1, and earlier their was a single core not up, but now there are four 100% cores and the BertMod says the power change from adding that one core on firmware 0.90 with ~0.9v to the 4 vmr's, was 174 watts with one core down and 180 watts with all cores running.

Any chance of a few photos? Hard to visualise.

https://docs.google.com/file/d/0B_DLmNkCkkVpZGRTV1NvTzhOMEk/edit?usp=drive_web
https://docs.google.com/file/d/0B_DLmNkCkkVpRDVFTTZ4TGp0MkU/edit?usp=drive_web

Remember, this is just testing conditions and this will be much neater after I figure out what I need to do and button up.  Might take a while to get the connectors to relocate the BBB tho.

Could you take one the other way, looking from the power supply towards the beaglebone? Just wanted to see how you are pushing the air down on the BBB.

All you'll see is the cardboard tucked under the module and tucked under the 90° angle of the front top.  There is a crease in the cardboard.  Unless it's you want me to search the cardboard from some indication that it was what my Jalapeno and broken coffee cup came in?

Now I recall, Avenger, embroiled in heated exchanges.  Are you with BFL?

Excuse me but I've got to get in some running with my dog.  A slow 7+miles RT to a nearby highway I think.

Sheesh, the photos you provided just show chunks of cardboard, I wanted to see how the air was being directed inside from the inlet fan. Forget it.

Look, the cardboard goes from the metal bottom to the angled edge of the front.  Air pushed in by the front fans can only go out the sides but pushes down on the BBB at the same time.  Experiment.  If you're not running a Mercury then my arrangement ain't best for you.

Ha! New high avg hashrate:  KnC 0:  | 163.9G/137.2Gh/s | A:133086 R:10263 HW:10757 WU:2191.8/m

Okay, back from the run.  Some thoughts.  Stick-on heatsinks/finned-heat-dispersion squares onto the VRMs so they lose heat more easily.  Perhaps as the VRMs heat an internal oscillator drifts away from it's best frequency like if internal caps change value.  And just before getting home the thought occurred to me that if the 8VRM boards are better than the 4VRM boards even tho half the VRMs are turned off, then it's because the 4 off VRMs have internal output filtering that is still attached to the 1 volt line.  Find a nice access point for that 1 volt rail or across the ground and 1 v output pins of the VRMs on the 4 VRM boards and solder tantalum caps.