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Topic: ¤¤¤¤ gekkorun.de - Gekkoscience Fun-Run - compare your share ¤¤¤¤ - page 16. (Read 63655 times)

sr. member
Activity: 462
Merit: 251
next one from germany Smiley

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 Smiley
thanks for joining.
have fun here!!
newbie
Activity: 10
Merit: 0
next one from germany Smiley

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...
Smiley
sr. member
Activity: 432
Merit: 250
Save the past & use the future ©
next one from germany Smiley

il0vew33d
DE
16WWNdm9bC4w6cTt8gsx6HN8kzypanBPwt_obelix


actually running @ 250mhz, passive cooling.

Great, man Cool!

Welcome to Gekkorun!

We´ll add you asap!

andY
newbie
Activity: 10
Merit: 0
next one from germany Smiley

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]
sr. member
Activity: 432
Merit: 250
Save the past & use the future ©
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!
legendary
Activity: 1274
Merit: 1000
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!
sr. member
Activity: 432
Merit: 250
Save the past & use the future ©

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
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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.
sr. member
Activity: 432
Merit: 250
Save the past & use the future ©
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...
hero member
Activity: 588
Merit: 500
Here is the reference to ramping that I had seen.

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


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
sr. member
Activity: 432
Merit: 250
Save the past & use the future ©
Here is the reference to ramping that I had seen.

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


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?
hero member
Activity: 588
Merit: 500
Here is the reference to ramping that I had seen.

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


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


sr. member
Activity: 432
Merit: 250
Save the past & use the future ©
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
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
sr. member
Activity: 432
Merit: 250
Save the past & use the future ©
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 Smiley.

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


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
hero member
Activity: 588
Merit: 500

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 Smiley!
Now I increased it up to 0.900V Smiley
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

sr. member
Activity: 432
Merit: 250
Save the past & use the future ©

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 Smiley!
Now I increased it up to 0.900V Smiley
and it´s possible to reach higher values..


Btw., got my R1 running @500MHz Wink

Cheers,
andY
hero member
Activity: 588
Merit: 500
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.  Smiley


Rich
sr. member
Activity: 432
Merit: 250
Save the past & use the future ©
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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