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Author Topic: Swedish ASIC miner company kncminer.com  (Read 3006925 times)
FeedbackLoop
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October 27, 2013, 11:34:33 AM
 #18621

Which is these formula?


These formulae were posted by Kano in a KNC thread, they merely allow you to compute your hashrate properly:

https://bitcointalk.org/index.php?topic=306969.msg3309728#msg3309728

ElGabo has:

11213824*2^32/(25*3600+2.5*60)
   5.3425410e+11
534 GH/s in accepted shares.

420356*2^32/(25*3600+2.5*60)
   2.0026792e+10
20 GH/s in hardware errors for less than 5% HW

72191.*2^32/(25.*3600.+2.5*60)
   3.4393565e+09
3.4 GH/s in rejected shares (538 GH/s full hashrate).


Which are outstanding values compared with what many people here, including me, have. Unfortunately it's hard to figure out what factors affect the real hashrates as most people do not post the source of their numbers and some others, like edgar, will prefer to cover the thread in flame instead of making some effort to search the threads, understand and cooperate.

My other question was if temperatures affect the output in your machine ElGabo, and if that affects HW (positively or negatively) but your HW is so low that your machine doesn't seem good to test this. Unless when the temperature is high (seeing that your screenshot shows very low temperatures) your hardware error rate goes much higher  (which would be the opposite of what people including Phoenix and DigginDeep just above seem to be seeing). Then we could see if that VRM output correlates. Is that the case?


tunctioncloud: 0.97 is horrible for my machine and many others.


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October 27, 2013, 12:16:51 PM
 #18622

Which is these formula?


These formulae were posted by Kano in a KNC thread, they merely allow you to compute your hashrate properly:

https://bitcointalk.org/index.php?topic=306969.msg3309728#msg3309728

ElGabo has:

11213824*2^32/(25*3600+2.5*60)
   5.3425410e+11
534 GH/s in accepted shares.

420356*2^32/(25*3600+2.5*60)
   2.0026792e+10
20 GH/s in hardware errors for less than 5% HW

72191.*2^32/(25.*3600.+2.5*60)
   3.4393565e+09
3.4 GH/s in rejected shares (538 GH/s full hashrate).


Which are outstanding values compared with what many people here, including me, have. Unfortunately it's hard to figure out what factors affect the real hashrates as most people do not post the source of their numbers and some others, like edgar, will prefer to cover the thread in flame instead of making some effort to search the threads, understand and cooperate.

My other question was if temperatures affect the output in your machine ElGabo, and if that affects HW (positively or negatively) but your HW is so low that your machine doesn't seem good to test this. Unless when the temperature is high (seeing that your screenshot shows very low temperatures) your hardware error rate goes much higher  (which would be the opposite of what people including Phoenix and DigginDeep just above seem to be seeing). Then we could see if that VRM output correlates. Is that the case?


tunctioncloud: 0.97 is horrible for my machine and many others.





It's s shame that there seems to be such a variance in build quality between rigs, things like slack screws make me think whoever assembled these things probably hadn't much experience. The temperature may just be causing better contact and compensating for these things and on two well made rigs may not have any effect at all. I've been lucky it seems, but if I had one of the rigs with problems I'd have it to bits and rebuild it and make sure things like thermal paste and contacts were all tickety boo. Like they should have when assembling them , which is not racket science really is it?
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October 27, 2013, 12:20:48 PM
 #18623

TEST_ASIC_BOARD_FOUND=FAIL

type only in your console when logged in:

cat /././var/log/initc.log


root@Jupiter-fuckoff:/var/volatile/log# cat initc.log
Return code = -11
TEST_READ_BBB_SN=OK
TEST_I2C_CONNECT=OK
TEST_LM75_TEST=OK
TEST_TPS65217_TEST=OK
TEST_TPS65217_CONFIG=OK
TEST_FPGA_CONFIG=OK
TEST_FPGA_TEST=OK
TEST_ONBOARD_EEPROM_EMPTY=OK
TEST_GET_SERIAL_NUMBER=OK
TEST_ONBOARD_EEPROM_WRITE=OK
TEST_MMC_REFLASH=OK
TEST_I2C_MUX_PROBE=OK
 Shocked TEST_ASIC_BOARD_FOUND=FAIL  Shocked
TEST_READ_IOBOARD_SN=OK
TEST_IOBOARD_SN_GOOD=OK
TEST_GET_CGMINER_CONFIG=OK
TEST_WRITE_CGMINER_CONFIG=OK

what can i do?
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October 27, 2013, 12:25:16 PM
 #18624

It's s shame that there seems to be such a variance in build quality between rigs, things like slack screws make me think whoever assembled these things probably hadn't much experience.


I doubt its the assembly. Its almost certainly because they chose not to test and bin the chips. All wafers have defunct chips and chips of varying quality, thats a given. Almost all asic manufacturers test their chips on the wafer, and then again once they are packaged, tossing out the broken ones and binning the others according to how well they perform (power consumption, clock speed, if applicable, number of working cores) and use different bins for different products (think various AMD or Intel chips with different clockspeeds), or combine good and not so good chips to get a more predictable end product (afaik, thats what BFL does).

KnC seems to solder all their chips on a module, and they will do a final assembly functional test, but whether you get 4 excellent or 4 mediocre chips or a mix of both is just a matter of luck.
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October 27, 2013, 12:33:43 PM
 #18625

11213824*2^32/(25*3600+2.5*60)
   5.3425410e+11
534 GH/s in accepted shares.

420356*2^32/(25*3600+2.5*60)
   2.0026792e+10
20 GH/s in hardware errors for less than 5% HW

72191.*2^32/(25.*3600.+2.5*60)
   3.4393565e+09
3.4 GH/s in rejected shares (538 GH/s full hashrate).



Where I must write that ??
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October 27, 2013, 12:58:17 PM
 #18626

It's s shame that there seems to be such a variance in build quality between rigs, things like slack screws make me think whoever assembled these things probably hadn't much experience.


I doubt its the assembly. Its almost certainly because they chose not to test and bin the chips. All wafers have defunct chips and chips of varying quality, thats a given. Almost all asic manufacturers test their chips on the wafer, and then again once they are packaged, tossing out the broken ones and binning the others according to how well they perform (power consumption, clock speed, if applicable, number of working cores) and use different bins for different products (think various AMD or Intel chips with different clockspeeds), or combine good and not so good chips to get a more predictable end product (afaik, thats what BFL does).

KnC seems to solder all their chips on a module, and they will do a final assembly functional test, but whether you get 4 excellent or 4 mediocre chips or a mix of both is just a matter of luck.

Sort-a like buying any CPU/GPU -- some take clock better than others, no cause for complaints as long as all manage the datasheet specs.
If it becomes profitable in the future, KNC will sell you "Deluxe 1337 Black Edition," with 100% good cores guaranteed Smiley
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October 27, 2013, 01:20:39 PM
 #18627

Hotter is better! I had a supplemental house fan & turned it off. ASICs fans are unplugged. Only
left the tilted case fans on. FW 9.7 and Enablecores afterwards. No Bertmod yet. HW error rate
was 19% before. Hashrate was mid-250s before. WU was 3900ish before.
Considering putting the case back on also...
Edit: power is now only 298 watts. I just removed the fans entirely and put a long piece of closed cell foam
across the tops of both heatsinks. Will see what happens.
Credit goes to user FoolPartedWithMoney for pointing-out first that more heat may be the key!







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timmmers
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October 27, 2013, 01:44:35 PM
 #18628

It's s shame that there seems to be such a variance in build quality between rigs, things like slack screws make me think whoever assembled these things probably hadn't much experience.


I doubt its the assembly. Its almost certainly because they chose not to test and bin the chips. All wafers have defunct chips and chips of varying quality, thats a given. Almost all asic manufacturers test their chips on the wafer, and then again once they are packaged, tossing out the broken ones and binning the others according to how well they perform (power consumption, clock speed, if applicable, number of working cores) and use different bins for different products (think various AMD or Intel chips with different clockspeeds), or combine good and not so good chips to get a more predictable end product (afaik, thats what BFL does).

KnC seems to solder all their chips on a module, and they will do a final assembly functional test, but whether you get 4 excellent or 4 mediocre chips or a mix of both is just a matter of luck.

Sort-a like buying any CPU/GPU -- some take clock better than others, no cause for complaints as long as all manage the datasheet specs.
If it becomes profitable in the future, KNC will sell you "Deluxe 1337 Black Edition," with 100% good cores guaranteed Smiley

Not what I meant really, the temperatures seem to have an effect on some machines but not others, they seem to all have a top end of about 140Gh per module but some take some help getting that.
True enough they rushed and didn't test the chips, but I don't think they assembled some rigs at all well at a basic level, and that's only what we can see. Leaving the sucking plastic on them doesn't show much attention to detail, so if they didn't do that simple thing what's the odds on thermal paste being well done? A few bent boards caused by the assembly or other minor defects could be why the heat makes such a change for some as they expand maybe I was thinking.

"Spoling the sheep for a hapeth of tar" my granny would say.
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October 27, 2013, 01:46:36 PM
 #18629

It's s shame that there seems to be such a variance in build quality between rigs, things like slack screws make me think whoever assembled these things probably hadn't much experience.


I doubt its the assembly. Its almost certainly because they chose not to test and bin the chips. All wafers have defunct chips and chips of varying quality, thats a given. Almost all asic manufacturers test their chips on the wafer, and then again once they are packaged, tossing out the broken ones and binning the others according to how well they perform (power consumption, clock speed, if applicable, number of working cores) and use different bins for different products (think various AMD or Intel chips with different clockspeeds), or combine good and not so good chips to get a more predictable end product (afaik, thats what BFL does).

KnC seems to solder all their chips on a module, and they will do a final assembly functional test, but whether you get 4 excellent or 4 mediocre chips or a mix of both is just a matter of luck.

well they likely will do this same method in the future..they thought they'd get 400gh they got up 550gh or more...so the plan to skip that step seemed to work in speeding up the delivery I guess...sloppy thou it maybe be....24hrs is the devil on rollerskates....in speed if you get the stuff off the plane via courier and into a working box

http://www.youtube.com/watch?v=ygE01sOhzz0

ie they went "plaid"

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FeedbackLoop
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October 27, 2013, 02:03:29 PM
 #18630

Also getting some better stats, 10 more cores, by just disabling the fan on just my problematic board.  Grin Still no numbers on actual average long-term performance but I guess/hope it will follow  Phoenix's path.

Temperature does not seem to change significantly matching FiatKillers pics. Perhaps the sensors are indeed not in chip itself like someone mentioned?  Sorry if that was already posted. Can't find it.

The sink does get crazy hot to the touch. Switching the bad board fan with a worse one. No fan at all feels too risky.
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October 27, 2013, 03:07:48 PM
 #18631

Hotter is better! I had a supplemental house fan & turned it off. ASICs fans are unplugged. Only
left the tilted case fans on. FW 9.7 and Enablecores afterwards. No Bertmod yet. HW error rate
was 19% before. Hashrate was mid-250s before. WU was 3900ish before.
Considering putting the case back on also...








fiatkiller, you are bold w/ turning off heat sink fans....but i have to agree....

miner_knc   250.75 GH/s   44,156k (99.83%)

my stats above on btcguild....AFTER TURNING OFF THE A/C....asic temps went up, but so did the HASHING as shown above...

something that would normally range around 220GH/s is now a solid 250+GH/s,

and yes, since error rate went from around 20% to now under 15%, that difference caused less wasted shares and more good share= higher hash rate at server. YAY!

wish I had one that was super like phoenix1969's, who has 3 saturns all above 270GH/s, but I am now happy with my unit though and no a/c....

ps asic temps went from low to mid 40'c, to now upper 40's to low 50's celsius...
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October 27, 2013, 03:19:11 PM
 #18632

Well I still am getting the "Running (Connect to CGMiner API failed)" error from the web GUI.
Yes, I have cleared the cash on the browser, AND used a different browser.

More importantly I can tell it isn't doing anything because the pool isn't getting much work.

Looks like 0.96 isn't up to prime time for my Mercury.  Going back to 0.95 because at least that was hashing something.  Unless there is something else to do to get 0.96 to work?

Thanks,

_theJestre


I have similar problems with my Saturn. Download bertmod and check the stats of your VRMs. You might have a bad unit or two. I have 3 bad VRMs out of my two boards. My guess is that with BAD VRMs you cannot update to the higher fw, probably because they are more well adjusted to work with the VRMs, and since some VRMs are not functioning [properly, or at all, like in my case], its causing the later fw to not work. The only fw I can get running stable is fw 0.9.4. Out of my Saturn, I am averaging 150gh/s.

Check with the bertmod patch, you might need to RMA the board. Or you could try all the tricks the good folks here have discussed. I've tried them all (other then disabling fans), and nothing fixed it.

Bertmod: http://forum.kncminer.com/forum/main-category/main-forum/6183-bertmod-0-2-unofficial-firmware-mod-feedback-thread
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October 27, 2013, 03:35:28 PM
 #18633

Well I still am getting the "Running (Connect to CGMiner API failed)" error from the web GUI.
Yes, I have cleared the cash on the browser, AND used a different browser.

More importantly I can tell it isn't doing anything because the pool isn't getting much work.

Looks like 0.96 isn't up to prime time for my Mercury.  Going back to 0.95 because at least that was hashing something.  Unless there is something else to do to get 0.96 to work?

Thanks,

_theJestre


I have similar problems with my Saturn. Download bertmod and check the stats of your VRMs. You might have a bad unit or two. I have 3 bad VRMs out of my two boards. My guess is that with BAD VRMs you cannot update to the higher fw, probably because they are more well adjusted to work with the VRMs, and since some VRMs are not functioning [properly, or at all, like in my case], its causing the later fw to not work. The only fw I can get running stable is fw 0.9.4. Out of my Saturn, I am averaging 150gh/s.

Check with the bertmod patch, you might need to RMA the board. Or you could try all the tricks the good folks here have discussed. I've tried them all (other then disabling fans), and nothing fixed it.

Bertmod: http://forum.kncminer.com/forum/main-category/main-forum/6183-bertmod-0-2-unofficial-firmware-mod-feedback-thread

I don't know if your problem is related, but I am now starting to suspect that a little extra heat (rather than cooling) and now as of recently, tightening down (slightly) on the heat sink crossmember screws (WHICH MOST LIKELY PUSHES THE CHIP DOWN AS WELL) has improved performance ON SOME machines....I suspect on yours, and I don't know DIDDLY (other than Bo), that you will probably find some of the screws on the crossmember for the heatsink can use a little tightening.....which in turn will probably make the chip have better contact to the board, then you will notice change in VRM stats...HOPEFULLY.

Disclosure...I KNOW NOTHING.
good luck.
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October 27, 2013, 03:37:56 PM
 #18634

eligius pool anyone can connect?

i see errors in my cgminer


looking job
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October 27, 2013, 04:41:49 PM
 #18635

I was right when I signaled two weeks ago at #kncminer channel that the Saturn seems to work better in higher temperature.
Now many people confirm it.
Going from 40-42 C to 48.5-50 C moves avg from 267 to 274 (at cgminer AND at the pool) and WU from 3850-3900 to 4010.
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October 27, 2013, 04:47:35 PM
 #18636

eligius pool anyone can connect?

i see errors in my cgminer



use elizium.name

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October 27, 2013, 04:48:03 PM
 #18637

I was right when I signaled two weeks ago at #kncminer channel that the Saturn seems to work better in higher temperature.
Now many people confirm it.
Going from 40-42 C to 48.5-50 C moves avg from 267 to 274 (at cgminer AND at the pool) and WU from 3850-3900 to 4010.

just plain crazy isn't?

My rig room is at 84 degree F, and my saturn is running the best it's ever ran....

btcg stats:
miner_knc   256.86 GH/s   44,536k (99.83%)

when before w/ extra fans and a/c I was at 220/230GH/s max at btcg....
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October 27, 2013, 04:50:09 PM
 #18638

I was right when I signaled two weeks ago at #kncminer channel that the Saturn seems to work better in higher temperature.
Now many people confirm it.
Going from 40-42 C to 48.5-50 C moves avg from 267 to 274 (at cgminer AND at the pool) and WU from 3850-3900 to 4010.

just plain crazy isn't?

My rig room is at 84 degree F, and my saturn is running the best it's ever ran....

btcg stats:
miner_knc   256.86 GH/s   44,536k (99.83%)

when before w/ extra fans and a/c I was at 220/230GH/s max at btcg....

Dam, now I am starting to wonder about the earlier firmwares that ran w/ low error rates, but low hashing too, maybe with this "HEATING" solution they might run even better than .97?

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October 27, 2013, 04:57:18 PM
 #18639

Boh! You should have posted here like Phoenix did!  Tongue  I also suspected this in the very first two days and thought to myself I was being silly...  Roll Eyes It also takes some colective courage to disable fans.

After disabling the two sink fans for the two worst boards and replacing that flow with two extra case fans placed at a distance, my jupiter went from a 500 GH/s melon to nearly 550 GH/s at pool.  

I'm getting about 10 extra GH/s at KNC's cgminer value and about 50 GH/s extra at pool and using the formula in the previous page (they measure the same) with a corresponding decrease in HW (16% HW to about 7% so far). Getting about 13 cores extra as reported by BertMod (2 to  4 bad ones remaining). Temps 52 in the front boards (the bad ones) and 63 in the back ones which either means the temp sensors are indeed in the DC/DC modules or that I got the bad boards wrong (but a good result...).
 
If these stats change significantly with longer averages I will post here. Otherwise it holds Smiley

Firmware 0.95.



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October 27, 2013, 04:59:17 PM
 #18640

soy, phoenix1969, btc_uzr, (and all others I forget) WHO ARE THE UNOFFICIAL CUSTOMER SUPPORT TEAM for KNC,

I THANK YOU.

I know there many who have contributed their knowledge, expertise, and testing stats, you are included in that thank you.

I know there should be more honorable mentions, so please cont. to mention them in your replies....since this is the only true form of support we have currently. I do thank knc for their efforts as well, as they did surmount that mountain peak.
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