Swedish ASIC miner company kncminer.com

[edgar]

what is the deal with KNC running Flushwork?

my GH/s rate drops by 100GH when it performs this task... and takes a while to build back up to previous rate

[The Avenger]

...

This setup also cools the VRMs much better. I had two ones (same location, see picture!) with a temperature of
51-52C. Those are now at about 47C. The only side effect is, that the heatsink is getting warmer. But - it's designed
for that. See the infrared thermometer measurements on the picture.

No temperature reading for the 4th VRM, sorry!

trepex

Great work trepex, thanks for sharing your mods and temperatures.

[sickpig]

Yeah, great idea!
(Don't do it in an earthquake region!)

Here is my setup. I removed that external case for the fans.
The results are great. The BertMod (modified ASCII script) reported temperatures dropped by 4-5C:

Old setup (with two additional fans on the side, one on top):
Board 0: Temperature sensor: 40.5C
Board 3: Temperature sensor: 40.5C

Modified Board 3 (the right one looking from the BBB):
Board 0: Temperature sensor: 41.0C
Board 3: Temperature sensor: 37.5C

Modified Board 0 as well and waited 10 minutes:
Board 0: Temperature sensor: 36.5C
Board 3: Temperature sensor: 36.0C

This setup also cools the VRMs much better. I had two ones (same location, see picture!) with a temperature of
51-52C. Those are now at about 47C. The only side effect is, that the heatsink is getting warmer. But - it's designed
for that. See the infrared thermometer measurements on the picture.

http://s23.postimg.org/fi2kq5plj/Saturn_Cooling_v4a.jpg
http://s17.postimg.org/mpj2had3f/Saturn_Cooling_v4.jpg
http://s17.postimg.org/p9epbe0nf/Saturn_Cooling_c.jpg

No temperature reading for the 4th VRM, sorry!

trepex

Hi trepex as usual great info shared here if you don't mind you could share also your modified ASCII version of asic_test.pl?

I've noticed you did change fans for the internal heatsink and that the new one are positioned lower than the original, did you considered the DPoS way?

which is why I lowered the fans to get 5-7C cooler  

anyway did you notice any increase in hashrate due to lower temp?

[sickpig]

I just did some port forwarding on my router.  Now i can access my KNC page from my cell phone when I'm out to check on it,update or reset, Also set up JuiceSSH app on my android.  So now i can connect to cgminer through ssh on the phone as well.  
https://i.imgur.com/GmfeKXD.png
https://i.imgur.com/QyvVugC.jpg?1

please use width property in img tags, thanks.

[frankenmint]

This seems to be what I'm pulling on stock Hash Rate on Mercury does this look good for WU?...right now it's 139GH 2020 WU

Also, I'm curious to know if dropping the stock fan helped at all in terms of hashrate?

[edgar]

OUCH! BTCGuild is down fluctuating, how do we apply a failover pool to these rigs?

[sickpig]

OUCH! BTCGuild is down fluctuating, how do we apply a failover pool to these rigs?

use fw 0.96, if you're using 0.95 or lower just edit /config/cgminer.conf manually adding failover pools.

[timmmers]

This seems to be what I'm pulling on stock Hash Rate on Mercury does this look good for WU?...right now it's 139GH 2020 WU

Also, I'm curious to know if dropping the stock fan helped at all in terms of hashrate?

Mine's almost a duplicate of that. Temp is 38c, I dropped the fan but it made no difference on a merc.
Oddly, I'm using my PSU box in the open case ...initially to stop the cat roosting in there..but at an angle it directs air nicely to where I want it.

[demonmaestro]

OUCH! BTCGuild is down fluctuating, how do we apply a failover pool to these rigs?

no issue on my end.

[edgar]

OUCH! BTCGuild is down fluctuating, how do we apply a failover pool to these rigs?

use fw 0.96, if you're using 0.95 or lower just edit /config/cgminer.conf manually adding failover pools.

not comfortable applying 0.96

but willing to try edit/config/cgminer.conf

where is this? in the KnC gui or via PuTTy?

[ElGabo]

This is mine.

I spent long hours when it arrived to figure out wich pci-e slot works fine with which hash card.

I've replaced the stock fans with 2 110cfm, 2 150cfm and at the intake in the middle there is one 150cfm. 2 170 cfm intake fans are on its way.

Now the result is this.

Room temp around 19 c.

My hashrate on Btcguild between 520-570Ghash

Now I'm trying to keep my hands off the box. If it ain't broke...

[sickpig]

OUCH! BTCGuild is down fluctuating, how do we apply a failover pool to these rigs?

use fw 0.96, if you're using 0.95 or lower just edit /config/cgminer.conf manually adding failover pools.

not comfortable applying 0.96

but willing to try edit/config/cgminer.conf

where is this? in the KnC gui or via PuTTy?

login via putty to your miner.
edit the file you'll find into /config/cgminer.conf accordingly.
pay attention cause the only editor i've found installed on the miner is vi and it's quite difficult to use at first.
to avoid problems imho use winscp to fetch your /config/cgminer.conf, save it locally into your win workstation, edit with your editor of choice, save it and put it back into the miner (via scp)

[sickpig]

This is mine.

I spent long hours when it arrived to figure out wich pci-e slot works fine with which hash card.

I've replaced the stock fans with 2 110cfm, 2 150cfm and at the intake in the middle there is one 150cfm. 2 170 cfm intake fans are on its way.

Now the result is this.

Room temp around 19 c.

My hashrate on Btcguild between 520-570Ghash

Now I'm trying to keep my hands off the box. If it ain't broke...

care to share a few pics, if you mind

[ElGabo]

care to share a few pics, if you mind
[/quote]

About the inside of the box?

[frankenmint]

I didn't do any mods except leave my top off the box and use it as an impromptu mining table for my new mercury and tons of extra metal.  There is no extra cooling going on.  but if I took my 140*4 that would avg 560 GH still?  I get it that there is more airflow needed to keep the heatsinks cool...but if the case is open then open air should still be adequate right?

[sickpig]

care to share a few pics, if you mind

About the inside of the box?

yep, u removed your lid right ?

[ElGabo]

care to share a few pics, if you mind

About the inside of the box?

yep, u removed your lid right ?

No, it's with closed box. I think the lid has to be on to get some air pressure inside.

On the other hand I've removed the two blades from the lid.

I'll open it and shoot some pics.

[trepex]

Hi trepex as usual great info shared here if you don't mind you could share also your modified ASCII version of asic_test.pl?

I've noticed you did change fans for the internal heatsink and that the new one are positioned lower than the original, did you considered the DPoS way?

which is why I lowered the fans to get 5-7C cooler  

anyway did you notice any increase in hashrate due to lower temp?

I will try to get an OK for publishing my (ugly) modified perl script to display the temperature and active cores.
That's the only information I really used for manual tuning at the moment.
I did ask the author (in the KnC forum) if he could publish an ASCII (terminal) version of his tool, never received
an answer there.

My fan had been loose inside that black "cover", the screws you see did nothing! Just decoration!
That had been fine with the original setup, in my setup it would not work. That's why I did use the pure
fans. There is one screw that holds the fan from sliding away from the heatsink. The rubber band (must
find 2 more to have a redundant rubber band installation) does the rest.
I think the asic heatsink is oversized (that's good!) and the cooling for the VRMs is undersized. That's why
I tried to get more airflow on the VRMs and a little bit less on the heatsink.
The additional fans on the side help cooling the heatsink.

Performance:

It looks like my performance did go up (average Gh/s over >12h) from
260-265 (no modding, case closed)
265-269 (case open, 2 fans on the side)
269-272 (case open, 2 fans on the side, 1 fan on top)
272-275 (current setup, 90min average only)

--------------------------------------------------------------------------------
 (5s):289.1G (avg):274.0Gh/s | A:371456  R:3840  HW:18401  WU:4003.5/m
 ST: 2  SS: 0  NB: 123  LW: 392704  GF: 0  RF: 0
 Connected to mint.bitminter.com diff 256 with stratum as user trepex.saturn
 Block: 000f0ca47675157c...  Diff:268M  Started: [10:35:24]  Best share: 341K
--------------------------------------------------------------------------------
 [P]ool management [ S ]ettings [D]isplay options [Q]uit
 KnC 0:                | 288.8G/274.0Gh/s | A: 371456 R: 3840 HW: 18401 WU: 4003.5/m
--------------------------------------------------------------------------------

[Bitcoinorama]

0.97 is out, enjoy!

[Mota]

merci.