¤¤¤¤ gekkorun.de - Gekkoscience Fun-Run - compare your share ¤¤¤¤ - page 16.

ammi84

sr. member

Activity: 462

Merit: 251

Quote from: il0vew33d on May 23, 2016, 05:20:52 PM

next one from germany

il0vew33d
DE
16WWNdm9bC4w6cTt8gsx6HN8kzypanBPwt_obelix
16WWNdm9bC4w6cTt8gsx6HN8kzypanBPwt_verleihnix

actually running @ 250mhz, passive cooling.

[edit]
added my second gekko, running @ 170mhz. this one is very unstable, please be patient Wink

[edit]

hi

thanks for joining.
have fun here!!

il0vew33d

newbie

Activity: 10

Merit: 0

Quote from: andymanone on May 23, 2016, 05:25:39 PM

Quote from: il0vew33d on May 23, 2016, 05:20:52 PM

next one from germany

il0vew33d
DE
16WWNdm9bC4w6cTt8gsx6HN8kzypanBPwt_obelix

actually running @ 250mhz, passive cooling.

Great, man Cool

!

Welcome to Gekkorun!

We´ll add you asap!

andY

hope, you have seen my second gekko, added just in the monent you wrote this...

andymanone

sr. member

Activity: 432

Merit: 250

Save the past & use the future ©

Quote from: il0vew33d on May 23, 2016, 05:20:52 PM

next one from germany

il0vew33d
DE
16WWNdm9bC4w6cTt8gsx6HN8kzypanBPwt_obelix

actually running @ 250mhz, passive cooling.

Great, man Cool

!

Welcome to Gekkorun!

We´ll add you asap!

andY

il0vew33d

newbie

Activity: 10

Merit: 0

next one from germany

il0vew33d
DE
16WWNdm9bC4w6cTt8gsx6HN8kzypanBPwt_obelix
16WWNdm9bC4w6cTt8gsx6HN8kzypanBPwt_verleihnix

actually running @ 250mhz, passive cooling.

[edit]
added my second gekko, running @ 170mhz. this one is very unstable, please be patient Wink

[edit]

andymanone

sr. member

Activity: 432

Merit: 250

Save the past & use the future ©

Quote from: Mikestang on May 23, 2016, 12:28:02 PM

Quote from: Mikestang on May 23, 2016, 12:27:42 PM

Well I got my internet turned back on this weekend, but my old modem/router doesn't work anymore so I had to buy a new router. Now I need to re-setup my home network, port forwarding, etc. etc. but I should be back to mining this week. Woo hoo!

Great, welcome back Wink

!

Mikestang

legendary

Activity: 1274

Merit: 1000

Quote from: Mikestang on May 23, 2016, 12:27:42 PM

Well I got my internet turned back on this weekend, but my old modem/router doesn't work anymore so I had to buy a new router. Now I need to re-setup my home network, port forwarding, etc. etc. but I should be back to mining this week. Woo hoo!

andymanone

sr. member

Activity: 432

Merit: 250

Save the past & use the future ©

Quote from: RichBC on May 22, 2016, 04:08:00 PM

I too am using that version and get the problems.... but just thought I would mention it. Also I wonder if the ramp is designed to prevent problems of current taken from the 5V / Hub and we are seeing problems with current taken from the Buck Converter? Although I would have thought a ramp would have helped both.

Another question is that I have read that the ramp is as long as 4 Minutes and yet my Vcore without load typically sits at 0.8V and as soon as the hashing starts properly it drops to 0.77V there is no gradual change, so am not sure I am seeing the ramp?

Either way it is worthy of further investigation or perhaps a question to novak?

Rich

Hmm, maybe it´s an idea to ask novak.

The TPS51219 is able to manage about 20A, ~~so I think it´s not the bottleneck/reason...~~
But I discovered, the regulator runs suspiciously hot w/o a sufficient cooling..

---------------------------------------------------------------------------------------------------------------------------------------------
EDIT: 05-24-2016:

After thinking a while (and do a little math) Roll Eyes

, I see the TPS could be the cause anyway...

The Gekko has a power consumption about ~ 21- 22Watts@450MHz
If I deduct the power loss of all "Non-ASIC"-Components there could be finally a power consumption about 18-19Watts:

19W / 0.9V = ~ 21,1A

So I suspect very strongly, the buck-converter could be the cause anyway...
---------------------------------------------------------------------------------------------------------------------------------------------

The datasheet offers also a 1Volt and a 1.05Volt stable fixed mode.
Maybe to switch it in the 1V fixed mode could be an option,
with a little drop while running, maybe down to 0.95V it could works?

andY

zOU

hero member

Activity: 728

Merit: 500

★ these are stars ★

Yes it's strange... they're headless, so I have no choice but power off/on.
I had the problem on a gibagyte brix/Ubuntu and the rpi/raspbian.

I have a lattepanda running win10, maybe I'll give that one a go.
Although there's more logistics as I have to relocate everything.

andymanone

sr. member

Activity: 432

Merit: 250

Save the past & use the future ©

Quote from: zOU on May 23, 2016, 09:35:36 AM

I thought that moving my compac to my RPi would fix my problem but it didn't.

After 2 days, I can't reach my RPi on the network and I have to reboot it and restart my 6 cgminer instances.

Logs shows no error...

hmm, thats strange,
I got this similar probs with my Ant R1 @ frequencies more than 400MHz.
it stops w/o any error, i have only to restart cgminer (not the whole Antrouter R1) and it runs again..

But my Gekko runs stable @450MHz w/o any issues.
I´ve used Novak´s custom cgminer win32-Version on a Win10-System (Asus eeePC) netbook.
(The stops you can see in my stats@gekkorun are only manually Wink

)

andY

zOU

hero member

Activity: 728

Merit: 500

★ these are stars ★

I thought that moving my compac to my RPi would fix my problem but it didn't.

After 2 days, I can't reach my RPi on the network and I have to reboot it and restart my 6 cgminer instances.

Logs shows no error...

RichBC

hero member

Activity: 588

Merit: 500

Quote from: andymanone on May 22, 2016, 11:08:27 AM

Quote from: RichBC on May 22, 2016, 10:25:34 AM

Here is the reference to ramping that I had seen.

Quote from: novak@gekkoscience on September 08, 2015, 03:47:28 AM

########################################

I (novak) have written a cgminer driver which enumerates the compacs as expected, removes the error, and ramps up the clock slowly to prevent spikes on USB power. My custom cgminer can be found here:
source code: gekkoscience.com/misc/cgminer-gekko.tar.gz
win32 binary: gekkoscience.com/misc/cgminer-gekko-win32.zip

novak

Ahh great,
but unfortunately I just use this version, but got the problems Undecided

Or is there a special parameter to set for get it works?

I too am using that version and get the problems.... but just thought I would mention it. Also I wonder if the ramp is designed to prevent problems of current taken from the 5V / Hub and we are seeing problems with current taken from the Buck Converter? Although I would have thought a ramp would have helped both.

Another question is that I have read that the ramp is as long as 4 Minutes and yet my Vcore without load typically sits at 0.8V and as soon as the hashing starts properly it drops to 0.77V there is no gradual change, so am not sure I am seeing the ramp?

Either way it is worthy of further investigation or perhaps a question to novak?

Rich

andymanone

sr. member

Activity: 432

Merit: 250

Save the past & use the future ©

Quote from: RichBC on May 22, 2016, 10:25:34 AM

Here is the reference to ramping that I had seen.

Quote from: novak@gekkoscience on September 08, 2015, 03:47:28 AM

########################################

I (novak) have written a cgminer driver which enumerates the compacs as expected, removes the error, and ramps up the clock slowly to prevent spikes on USB power. My custom cgminer can be found here:
source code: gekkoscience.com/misc/cgminer-gekko.tar.gz
win32 binary: gekkoscience.com/misc/cgminer-gekko-win32.zip

novak

Ahh great,
but unfortunately I just use this version, but got the problems Undecided

Or is there a special parameter to set for get it works?

RichBC

hero member

Activity: 588

Merit: 500

Here is the reference to ramping that I had seen.

Quote from: novak@gekkoscience on September 08, 2015, 03:47:28 AM

########################################

I (novak) have written a cgminer driver which enumerates the compacs as expected, removes the error, and ramps up the clock slowly to prevent spikes on USB power. My custom cgminer can be found here:
source code: gekkoscience.com/misc/cgminer-gekko.tar.gz
win32 binary: gekkoscience.com/misc/cgminer-gekko-win32.zip

novak

andymanone

sr. member

Activity: 432

Merit: 250

Save the past & use the future ©

Quote from: RichBC on May 22, 2016, 09:41:15 AM

andY thanks for the info, and glad it's not just me getting things running. Yes I also see the Vcore drop to zero and never recovers from the without help. I assume that some sort of current limit is tripped in the 51219? I think it has various different modes it can be set in but need to read the data sheet. Will retry at lower frequencies and see if it's frequency / current draw related, which I suspect it is?

I am sure I read somewhere about cgminer ramping in some way to prevent this problem?

Yes had wondered about some additional heatsinking so will add something when I find time for a play.

Rich

-> Here is the TPS51219 Datasheet

@current limit:
Yes I think, thats the problem...

If there is a way to solve it with a cgminer ramping, that would be great!

andY

RichBC

hero member

Activity: 588

Merit: 500

andY thanks for the info, and glad it's not just me getting things running. Yes I also see the Vcore drop to zero and never recovers from the without help. I assume that some sort of current limit is tripped in the 51219? I think it has various different modes it can be set in but need to read the data sheet. Will retry at lower frequencies and see if it's frequency / current draw related, which I suspect it is?

I am sure I read somewhere about cgminer ramping in some way to prevent this problem?

Yes had wondered about some additional heatsinking so will add something when I find time for a play.

Rich

andymanone

sr. member

Activity: 432

Merit: 250

Quote from: RichBC on May 22, 2016, 04:20:20 AM

Very Nice. I will go back to my R1 once I have the Compac sorted. Which resistor did you change on the Compac to up the Vcore Voltage?

The onboard 10k pot goes from ground in chain with a ~10k resistor to the TPS51219 voltage regulator.
alle what you have to do is to remove the 10k res and replace it with a 17k or 20k resistor

.

Here a pic, which resistor you have to remove/replace:

Quote from: RichBC on May 22, 2016, 04:20:20 AM

One thing I am finding with the Compac is that it seems a bit fussy about starting hashing, sometimes have to go through multiple plugs & unplugs and restarts of cgminer. However once it's going will run for days without a hitch.
Rich

Same things happens to me Sad

!!
The problem seem to be, that vcore drops down for a moment after starting cgminer...
In the most cases, the vcore vary after start and than it goes to zero.
I have to plug out and in, and fiddle around with the vcore value and after a lot of unplugs an replugs
it begins to hash.

But when it runs, than it´s perfect, stable and w/o any probs!
No zombie or other issues...

Little Hint: to prevent overheating of TPS 51219, I've added an small Alu-Cooler on the backside.

andY

RichBC

hero member

Activity: 588

Merit: 500

Quote from: andymanone on May 22, 2016, 04:08:25 AM

Quote from: RichBC on May 20, 2016, 02:58:30 PM

Even with external Power I have now stopped using my R1 as a Controller as above 300MHz I have had problems with keeping it running, wheras with cgminer on a PC everything fine up to 425MHz and I think will go higher once I up the Core Voltage.

Rich

Hi Rich, I´ve removed sucessfully the Vcore limit yesterday

!
Now I increased it up to 0.900V

and it´s possible to reach higher values..

Btw., got my R1 running @500MHz Wink

Cheers,
andY

Very Nice. I will go back to my R1 once I have the Compac sorted. Which resistor did you change on the Compac to up the Vcore Voltage?

One thing I am finding with the Compac is that it seems a bit fussy about starting hashing, sometimes have to go through multiple plugs & unplugs and restarts of cgminer. However once it's going will run for days without a hitch?

Rich

Rich

andymanone

sr. member

Activity: 432

Merit: 250

Quote from: RichBC on May 20, 2016, 02:58:30 PM

Even with external Power I have now stopped using my R1 as a Controller as above 300MHz I have had problems with keeping it running, wheras with cgminer on a PC everything fine up to 425MHz and I think will go higher once I up the Core Voltage.

Rich

Hi Rich, I´ve removed sucessfully the Vcore limit yesterday

!
Now I increased it up to 0.900V

and it´s possible to reach higher values..

Btw., got my R1 running @500MHz Wink

Cheers,
andY

RichBC

hero member

Activity: 588

Merit: 500

Quote from: andymanone on May 19, 2016, 01:41:21 PM

Quote from: Mikestang on May 19, 2016, 01:26:15 PM

Quote from: jacobmayes94 on May 19, 2016, 12:31:11 PM

Can you use a compac stick with an antrouter as the controller as you can the U3?
If so, I will consider getting one when finances are good.

You can use it as a controller but I don't know if it provides enough power to the stick. Might need a powered hub plugged into the ant.

Yes, Mike,
you´re right!
The R1 doesn´t provide enough power for a overclocked Gekko ...

andY

Even with external Power I have now stopped using my R1 as a Controller as above 300MHz I have had problems with keeping it running, wheras with cgminer on a PC everything fine up to 425MHz and I think will go higher once I up the Core Voltage.

My miner RichBC G1 offline at the moment as I am away from home & had to take the PC with me..... But.... I will be back next Week and we will be moving onward & upward.

Rich

andymanone

sr. member

Activity: 432

Merit: 250

Quote from: Mikestang on May 19, 2016, 01:26:15 PM

Quote from: jacobmayes94 on May 19, 2016, 12:31:11 PM

Can you use a compac stick with an antrouter as the controller as you can the U3?
If so, I will consider getting one when finances are good.

You can use it as a controller but I don't know if it provides enough power to the stick. Might need a powered hub plugged into the ant.

Yes, Mike,
you´re right!
The R1 doesn´t provide enough power for a overclocked Gekko ...

andY

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