GRIDSEED G-BLADE Overclocking 7Mh/s, improvements and repair

[wolfey2014]

42K resistor gives way less HW errors at 1063Mhz

7.3Mh/s seems to be the limit with the actual components on the power board.
Many components are getting really hot and need active cooling to work.

I'll try some improvements on the power board later, as suggested by wolfey.
For now, I'm happy with the results, but it's really a shame that Gridseed haven't designed a better power board to get the full potential from the chips.

Thanks J4!
You are getting great results in spite of the lack of more robust driver components IMO! 
But, now we know there is a bit more room for improvement as at 7.3MHs, it's still less than 100KHs per chip.
91.25KHs per chip to be exact. I am pretty sure we can hit 8MHs! Awesome!
My seeds chips are stably running at 100KHs each! So we need to see about opening up the throttles just a tad more and we'll have it!
On with higher rating key components then?
Again, excellent work J4bberwock!

[J4bberwock]

last screencap for today.
1 hour @ 7.2Mh/s with 9 HW errors in the first 3 minutes, time for the board to warm up.
Looks stable but needs active cooling on the powerboards

[wolfey2014]

last screencap for today.
1 hour @ 7.2Mh/s with 9 HW errors in the first 3 minutes, time for the board to warm up.
Looks stable but needs active cooling on the powerboards

Cool! I mean, HOT! 

So are you thinking of stopping there?
Do you think all blades will react the same way if standardized? Or is it too early to tell?
I'd love to get rid of the loud fan noise! I hear it's pretty ridiculous. Any chance for a down-volt mod on the fan? Of course, one can always find a quiet-er alternative but I'd rather not blow the money on a silly cooling fan in the name of a most efficient ROI period.

How much extra coin do you think this current mod will run on average?

I think it sucks that Gridseed didn't come out with dedicated Scrypt Asics instead of dual with more than half the chips processing power intentionally going unused! We'd have like 18MHs out of those 80 chips then!

Anyway.....onward!

Wolfey2014

[GenTarkin]

Question, the HW shown, is that HW count of diff1 shares or vardiff shares?

[Xer0]

what about replacing the mosfets?

the twin ones are IR5300, the 90° flipped one however is a 5301

i made a table on Digikey with ones matchig the package type, sorted down by amperage:
HEXFETs

but someone who knows better should filter it down further by all that stuff like D2S, Vgs, Qg, Ciss etc pp...

[J4bberwock]

what about replacing the mosfets?

the twin ones are IR5300, the 90° flipped one however is a 5301

i made a table on Digikey with ones matchig the package type, sorted down by amperage:
HEXFETs

but someone who knows better should filter it down further by all that stuff like D2S, Vgs, Qg, Ciss etc pp...

Thanks for your help.

if we stick with PQFN package, this one should be fine with higher specs.

http://www.irf.com/product-info/datasheets/data/irfh7004pbf.pdf


@ GenTarkin , I still don't really understand how to make appropriate calculation on HW errors percentage.

here is tonight result



actually, 487 errors on 10 hours @ 7488kh/s with difficulty 2300

My math would be 487/(7488*1000*3600*10)*100 = 0.0018%
can someone please confirm my math is OK?
It should be ok if 1 HW error is actually 1 failed hash over thousands because of HW

It would be different if it was 1 failed good share because of HW, but how can you guess it is a good share if it failed?

[wolfey2014]

what about replacing the mosfets?

the twin ones are IR5300, the 90° flipped one however is a 5301

i made a table on Digikey with ones matchig the package type, sorted down by amperage:
HEXFETs

but someone who knows better should filter it down further by all that stuff like D2S, Vgs, Qg, Ciss etc pp...

Thanks for your help.

if we stick with PQFN package, this one should be fine with higher specs.

http://www.irf.com/product-info/datasheets/data/irfh7004pbf.pdf


@ GenTarkin , I still don't really understand how to make appropriate calculation on HW errors percentage.

here is tonight result

actually, 487 errors on 10 hours @ 7488kh/s with difficulty 2300

My math would be 487/(7488*1000*3600*10)*100 = 0.0018%
can someone please confirm my math is OK?
It should be ok if 1 HW error is actually 1 failed hash over thousands because of HW

It would be different if it was 1 failed good share because of HW, but how can you guess it is a good share if it failed?

Yo, they've done infrared tests on the card, just like you wished for
Have a look! http://cryptomining-blog.com/
Wolfey

[J4bberwock]

Yo, they've done infrared tests on the card, just like you wished for
Have a look! http://cryptomining-blog.com/
Wolfey

Nice.
we can see that the 16v capacitor is also hot, but the ferrite beads aren't that bad.

So maybe double power line to feed the board can be done quite easily by duplicating the power board and connecting it to its outputs.
We need some input point to connect it, it would be much more easier if the board had some through hole components, but some places could be easy to connect to.

I might try a proto board in a week or so, I already have most of the components at home from other projects.

[HASHRA]

I know this is a little off-topic but how many blades can you run on 1 ras pi?

We have been running 4 off one Pi with our firmware with no issues.

Think we maybe able to get to 6 or 8 …. working on it.

[volder]

I know this is a little off-topic but how many blades can you run on 1 ras pi?

We have been running 4 off one Pi with our firmware with no issues.

Think we maybe able to get to 6 or 8 …. working on it.

Hashra, I sent you an email earlier asking if you had plans to suppor Gridseed Blades at 838MHz in your CONTROLA software. Right now it's either 800MHz or 850MHz and neither of these is ideal.

Thanks.

[GenTarkin]

I know this is a little off-topic but how many blades can you run on 1 ras pi?

We have been running 4 off one Pi with our firmware with no issues.

Think we maybe able to get to 6 or 8 …. working on it.

Question, how the hell are you able to do this? I have 2 pi's and after about a minute of mining the USB port just resets and mining stops. I have a powered hub plugged into the rpi's USB port and the miners plugged into the powered hub.
Each pi had the same freaking issue.
Please advise! =)

[ZiG]

what about replacing the mosfets?

the twin ones are IR5300, the 90° flipped one however is a 5301

i made a table on Digikey with ones matchig the package type, sorted down by amperage:
HEXFETs

but someone who knows better should filter it down further by all that stuff like D2S, Vgs, Qg, Ciss etc pp...

Thanks for your help.

if we stick with PQFN package, this one should be fine with higher specs.

http://www.irf.com/product-info/datasheets/data/irfh7004pbf.pdf


@ GenTarkin , I still don't really understand how to make appropriate calculation on HW errors percentage.

here is tonight result



actually, 487 errors on 10 hours @ 7488kh/s with difficulty 2300

My math would be 487/(7488*1000*3600*10)*100 = 0.0018%
can someone please confirm my math is OK?
It should be ok if 1 HW error is actually 1 failed hash over thousands because of HW

It would be different if it was 1 failed good share because of HW, but how can you guess it is a good share if it failed?

This one should be good substitute IMHO...:

http://www.irf.com/product-info/datasheets/data/irfh4201pbf.pdf

100A continuous current ...

But main Capacitor is too small...needs a much bigger value...

ZiG

[wolfey2014]

what about replacing the mosfets?

the twin ones are IR5300, the 90° flipped one however is a 5301

i made a table on Digikey with ones matchig the package type, sorted down by amperage:
HEXFETs

but someone who knows better should filter it down further by all that stuff like D2S, Vgs, Qg, Ciss etc pp...

Thanks for your help.

if we stick with PQFN package, this one should be fine with higher specs.

http://www.irf.com/product-info/datasheets/data/irfh7004pbf.pdf


@ GenTarkin , I still don't really understand how to make appropriate calculation on HW errors percentage.

here is tonight result



actually, 487 errors on 10 hours @ 7488kh/s with difficulty 2300

My math would be 487/(7488*1000*3600*10)*100 = 0.0018%
can someone please confirm my math is OK?
It should be ok if 1 HW error is actually 1 failed hash over thousands because of HW

It would be different if it was 1 failed good share because of HW, but how can you guess it is a good share if it failed?

This one should be good substitute IMHO...:

http://www.irf.com/product-info/datasheets/data/irfh4201pbf.pdf

100A continuous current ...

But main Capacitor is too small...needs a much bigger value...

ZiG

No need for 100A continuous current. Way overkill!
A couple higher value caps are called for or at least 1 higher value cap.
It should not be getting hot much less warm. Anyway.....
Wolfey2014

[ZiG]

what about replacing the mosfets?

the twin ones are IR5300, the 90° flipped one however is a 5301

i made a table on Digikey with ones matchig the package type, sorted down by amperage:
HEXFETs

but someone who knows better should filter it down further by all that stuff like D2S, Vgs, Qg, Ciss etc pp...

Thanks for your help.

if we stick with PQFN package, this one should be fine with higher specs.

http://www.irf.com/product-info/datasheets/data/irfh7004pbf.pdf


@ GenTarkin , I still don't really understand how to make appropriate calculation on HW errors percentage.

here is tonight result



actually, 487 errors on 10 hours @ 7488kh/s with difficulty 2300

My math would be 487/(7488*1000*3600*10)*100 = 0.0018%
can someone please confirm my math is OK?
It should be ok if 1 HW error is actually 1 failed hash over thousands because of HW

It would be different if it was 1 failed good share because of HW, but how can you guess it is a good share if it failed?

This one should be good substitute IMHO...:

http://www.irf.com/product-info/datasheets/data/irfh4201pbf.pdf

100A continuous current ...

But main Capacitor is too small...needs a much bigger value...

ZiG

No need for 100A continuous current. Way overkill!
A couple higher value caps are called for or at least 1 higher value cap.
It should not be getting hot much less warm. Anyway.....
Wolfey2014

Wolfey...I don't understand... WHY you are filling obligated to POST YOUR OPINION(S) ABOUT THINGS that you DON"T HAVE A SLIGHTEST CLUE HOW ARE THEY DESIGNED AND OPERATING...?

Do you still think that the Gridseed CHIPS are supplied with 12V...or 5V...or maybe 3.3 V...as you posted in the other thread for 5-chips voltage mod...?... I will give you a clue...NONE OF THE ABOVE...  

What about Amperage 1 Gridseed chip is sucking ...@ Stock / idle...or Overvolted / Overclocked...Any Ideas...?

In order to post this (non-sence) opinion...you should know that first...and multiply by 40 chips on one blade board...Capisco...?

Please...stop contaminating EVERY thread that you are getting your fingers on...it is making them very UNREADABLE and HARD to follow...pages and pages of very little or no substance...

Thanks...

ZiG  

EDIT...: ...And just to show that I REALLY don't have anything personally against you except above...
               -I will give you a hand again... Wattage P is = Voltage V * Cirrent I ...or maybe you are already familiar with the Formula ... P = V * I

               -5-chip design is sucking 20+ Watts "P" ...overvolted/overclocked...knowing the Voltage "V"...you can figure out the Current "I"... divide by 5 ...you are getting current requirement PER CHIP...Now multiply by 40 ...for the Blade(s) design...Got it...?  ...SECOND EDIT...ANSWER...NO
      

[wolfey2014]

what about replacing the mosfets?

the twin ones are IR5300, the 90° flipped one however is a 5301

i made a table on Digikey with ones matchig the package type, sorted down by amperage:
HEXFETs

but someone who knows better should filter it down further by all that stuff like D2S, Vgs, Qg, Ciss etc pp...

Thanks for your help.

if we stick with PQFN package, this one should be fine with higher specs.

http://www.irf.com/product-info/datasheets/data/irfh7004pbf.pdf


@ GenTarkin , I still don't really understand how to make appropriate calculation on HW errors percentage.

here is tonight result



actually, 487 errors on 10 hours @ 7488kh/s with difficulty 2300

My math would be 487/(7488*1000*3600*10)*100 = 0.0018%
can someone please confirm my math is OK?
It should be ok if 1 HW error is actually 1 failed hash over thousands because of HW

It would be different if it was 1 failed good share because of HW, but how can you guess it is a good share if it failed?

This one should be good substitute IMHO...:

http://www.irf.com/product-info/datasheets/data/irfh4201pbf.pdf

100A continuous current ...

But main Capacitor is too small...needs a much bigger value...

ZiG

No need for 100A continuous current. Way overkill!
A couple higher value caps are called for or at least 1 higher value cap.
It should not be getting hot much less warm. Anyway.....
Wolfey2014

Wolfey...I don't understand... WHY you are filling obligated to POST YOUR OPINION(S) ABOUT THINGS that you DON"T HAVE A SLIGHTEST CLUE HOW ARE THEY DESIGNED AND OPERATED...?

Do you still think that the Gridseed CHIPS are supplied with 12V...or 5V...or maybe 3.3 V...as you posted in the other thread for 5-chips voltage mod...?... I will give you a clue...NONE OF THE ABOVE...    

What about Amperage 1 Gridseed chip is sucking ...@ Stock / idle...or Overvolted / Overclocked...Any Ideas...?

In order to post this (non-sence) opinion...you should know that first...and multiply by 40 chips on one blade board...Capisco...?

Please...stop contaminating EVERY thread that you are getting your fingers on...it is making them very UNREADABLE and HARD to follow...pages and pages of very little or no substance...

Thanks...

ZiG 

Zig, stop attacking me and trying to justify it with your own 'non-sense'.
I am not even going to bother defending myself to you.
There is plenty of evidence on other threads that YOU don't know what you're talking about! Why are people ruining their pods with the Zig mod? Yeah, you really know what you're doing there pal.
What I state about things are easily understood by people that can read and understand English! Stop trying to fool everybody. It ain't workin!
Gridseed ARE powered by 12V and 5V. That is all I ever said and it IS true! Stop trying to twist everything I say in some lame attempt to be right, maggot!
I do a lot more good on here than you do, anyway!
Bye bye!

[scriptcloud]

Will this void the warranty?

[wolfey2014]

Will this void the warranty?

Yes. Mods void all warranties.

[ZiG]

Will this void the warranty?

With ASICs and their short lifetime span the "warranty" is pretty much nonexistent...IMHO

[J4bberwock]

Will this void the warranty?

Yes, and it'll most likely destroy your blade, so don't do it unless you know what you do and you are able to fix all the mess you could have done trying to improve.

I decided to try it because I was confident I'll be able to fix it or at least revert back to stock if anything went wrong.
Even knowing that, I only tried one PCB at a time

[scriptcloud]

Ah I see. Thanks!