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

[Blisk]

So as I see you will add mosfets like there are Q5 to Q8?
Are you sure that other parts like L2 and some resistors can handle that?

[J4bberwock]

So as I see you will add mosfets like there are Q5 to Q8?
Are you sure that other parts like L2 and some resistors can handle that?

all the overheating parts will be doubled, including L2.
The up1509 will be powered by a doubled channel because the actual limiting factor is the capacity of the channel.

It should work since the other components aren't stressed that much, even when I overclock @ 7.5MH/s
We might be able to achieve around 8MH/s, maybe a little more.
On my pods, the chips are running at least at 104kh/s, so my math says 8.3Mh/s is doable with the good power board.

[Blisk]

OK, share with us what will you do so we can do it too.
I have planned to add some more heatsinks to board, to cool down chips and some thermal switches if something goes wrong it will shut down power supply.
I thought 95 oC is top limit

[wolfey2014]

Wow J4! I'm impressed!
From the sounds of it, these things are gonna look interesting when you guys get finished with your modding work!
I hope they deliver what you hope they do. 8+MHs stable would be something! Uhm, I mean, will be something
Sounds like you have everything under control. If I had my own blade, I'd be right there with ya!
I can hardly wait to see your results!   

Just make sure everything in the power system is super beefy overkill and you can then start overclocking without having to be concerned about supply / driver side failures and such. I always do this for my prototypes. They always contain ample current carrying capacity.

I recently took a look and found that Hashra has some new super duper - up to 90MHs Scrypt hashers for sale now. Their own brand with I think, Pioneer chips in them. Bye bye GridSeed ASICs?
Our pod hasher days are now numbered, for sure! So are our blades, but we can still probably get a few to several months of profits out of them before the diff' rises too high for them to be viable anymore. Still, should be plenty of time to ROI on them at least.
That's my guess based on what I and some others think. So we need all the OC / profit increase we can get, now! now! now! Just my non-expanded upon, current point of view.

Just out of curiosity, isn't there a way to simply add solder trace to thickin up power the busses on the boards instead of what ever it is you're doing with the pod pcb's? Or is it just for prototyping?

Go Hackers Go!

[Blisk]

hashra is too expencive they offer 90Mhash for 15.000$
You can get 250Mhash for 12.000$
and forget about overclocking and people quickly forget payback time.
If you pay that money for the device when you get money back?
We learn from Bitcoin asics.... almost "never".
also people forget about producing costs of one of that machines it is under 1.000$ and you are paying 15.000$
why do you think it is much more business for them to sell those machines than to use it to mine?

[wolfey2014]

hashra is too expencive they offer 90Mhash for 15.000$
You can get 250Mhash for 12.000$
and forget about overclocking and people quickly forget payback time.
If you pay that money for the device when you get money back?
We learn from Bitcoin asics.... almost "never".
also people forget about producing costs of one of that machines it is under 1.000$ and you are paying 15.000$
why do you think it is much more business for them to sell those machines than to use it to mine?

You state the obvious as though you have or you are going to receive an argument.
Supply and demand is the driving force you speak of.
Please, what is your source for your claim of 250MHs Scrypt for $12,000?
I bet Hashra will match if not beat it if it is legitimate and not just based on Vapor Ware (non-existent on the market if it exists at all) pricing.
Link please?

It still may be viable to overclock the Blades, if not just a fun challenging hobbyists' thing to do on the weekend. The primary question being answered right now is, can it be done? And it seems it can be done, thus far anyway.

[bobby35ny]

I do not compare prices on machines that are "coming soon" or Q/1/2/3/4.
Too many companies with delays.
Right now the A2"s are shipping and they are pricey but the only game in town as of TODAY.

June. 1st might or might not be a different story.
I know of 3 other companies that are "coming soon on or about June 1st." If they are shipping then I will compare.

-Bobby

[Blisk]

Yes KNC and you have two more companies which you can preorder with 30% paying now and the rest before shipping.
Hashra have to high prices like gridseed have, people forget to calculate when you get money back and forget to calculate that other people get those miners and dificulty will raise like hell.
Nobody learn from Bitcoins?
And you forget to calculate that 250Mhash or 90Mhash machines in factory cost less than 1000$ and I am asking again why do you think they seel them and not use them? Just simple calculation again, because they will never get that much coins from it like when they can sell it fo 10.000$.

I buyed gridseeds because I am interested in ovrclocking it, only that.
And the only but really the only way to have those miner is to build it by yourself.
I have to less knowledge about that but I know that many people have enough of it and we can together build low price miners.
and only this way you will have some profit.

And only if you get on lottery and than you buy those miners and they give you money back and maybe some extra money in 6 months when they pay back itself.
and again, didn't we learned nothing by BTC asisc, just check interent.

[wolfey2014]

hashra is too expencive they offer 90Mhash for 15.000$
You can get 250Mhash for 12.000$
and forget about overclocking and people quickly forget payback time.
If you pay that money for the device when you get money back?
We learn from Bitcoin asics.... almost "never".
also people forget about producing costs of one of that machines it is under 1.000$ and you are paying 15.000$
why do you think it is much more business for them to sell those machines than to use it to mine?

+9999999

WHERE?

Wolfey...even after 600+ posts ...you are acting like a noob...you don't know where is it...?

FYI... KnC Titan...

ZiG

Shut up Zig....you miss the point, as usual.....

No Wolfey...You shut up...

The reference to 250M ...now 300M... is only 1 miner...KnC...there is NO other with that specs and price...

I am not missing anything, noob...as usual you don't know shit...but still expressing "opinion(s)"...

ZiG 

I'm so happy that my presence drives you insane!!!!, Zit...

[J4bberwock]

To stay on topic, since I'm back home, I made some improvements to the cooling.
Looks interesting for now.
heatsinks in each chips, forced air flow on the overheating parts with custom cover.
a few pics will be posted soon.

I also tried dual 25V 1000uF capacitors I had at hand, but they don't improve anything.
So 220uF 25V should be enough and a little smaller.

BTW, I managed to melt a power plug from my cables by trying back a 46K resistor. Simply too much current for it to handle if you use a single plug.

[wolfey2014]

To stay on topic, since I'm back home, I made some improvements to the cooling.
Looks interesting for now.
heatsinks in each chips, forced air flow on the overheating parts with custom cover.
a few pics will be posted soon.

I also tried dual 25V 1000uF capacitors I had at hand, but they don't improve anything.
So 220uF 25V should be enough and a little smaller.

BTW, I managed to melt a power plug from my cables by trying back a 46K resistor. Simply too much current for it to handle if you use a single plug.

Well, that's the price of progress

How much current is the blade pulling when overclocked?
Those coaxial plugs are obviously not suited to the task.

You might want to try 3500uf@35V and see what happens.
I put them across the output of any power supply I use to power these seeds. Even a well regulated and filtered one. It helps!

[Blisk]

To stay on topic, since I'm back home, I made some improvements to the cooling.
Looks interesting for now.
heatsinks in each chips, forced air flow on the overheating parts with custom cover.
a few pics will be posted soon.

I also tried dual 25V 1000uF capacitors I had at hand, but they don't improve anything.
So 220uF 25V should be enough and a little smaller.

BTW, I managed to melt a power plug from my cables by trying back a 46K resistor. Simply too much current for it to handle if you use a single plug.

you mean heatsink on each power supply chip? Mining chips are not that hot i assume
hihger value capactior can't do much good, because It is just glading input capacitor.
Try to put some larger heatsink on the bottom side of board where it is high temperature of power chips

[J4bberwock]

To stay on topic, since I'm back home, I made some improvements to the cooling.
Looks interesting for now.
heatsinks in each chips, forced air flow on the overheating parts with custom cover.
a few pics will be posted soon.

I also tried dual 25V 1000uF capacitors I had at hand, but they don't improve anything.
So 220uF 25V should be enough and a little smaller.

BTW, I managed to melt a power plug from my cables by trying back a 46K resistor. Simply too much current for it to handle if you use a single plug.

you mean heatsink on each power supply chip? Mining chips are not that hot i assume
hihger value capactior can't do much good, because It is just glading input capacitor.
Try to put some larger heatsink on the bottom side of board where it is high temperature of power chips

heatsinks on each mining chip. after overclocking with 43K resistor, they are getting hot. actually, the body of the blade is around 40°C. warm to touch.
heatsink under the power chips helps too, but I only have 1 that fits at the moment.

[Blisk]

http://www.ebay.com/itm/191132794428?var=490302573523&ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649

[J4bberwock]

http://www.ebay.com/itm/191132794428?var=490302573523&ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649

for some reasons, item restricted by ebay... can't see it

I used the ones from this auction.

http://cgi.ebay.fr/ws/eBayISAPI.dll?ViewItem&item=251251434021&ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
1mm too small, but they are doing the job.
higher fins would have been better too

[Blisk]

these are a little bigger and price is lower. here is link you can see it
http://www.ebay.com/itm/New-High-Quality-5pcs-11x11x5mm-adhesive-Aluminum-Heat-Sink-For-Memory-Chip-IC-/131014795047?pt=LH_DefaultDomain_0&hash=item1e81171f27

[Xer0]

has already someone found the "vMod 1" aka bridge-two-jumpers?

[xcooling]

no, can u explain more ?

Or give us the link

[Xer0]

this: https://bitcointalk.org/index.php?topic=575315.0#post_VMOD1

[J4bberwock]

has already someone found the "vMod 1" aka bridge-two-jumpers?

I checked on the schematics of the pod, so, basically, you are bridging R333, and then you enable voltage=1 all the time by bridging R337.
They are connected to pin 13 and 12 of the up1509, so quite easy to find.
 I'll have a look after breakfast.

I'll check on the PCB, but not sure I'll mod this one. I managed to get 2 hw errors on 8 hours @ 7.2MH/s with my custom cooling.
I'll buy a second one to try.

[2014-05-04 08:14:07] Runtime: 8 hrs : 48 mins : 59 secs
[2014-05-04 08:14:07] Average hashrate: 7.2 Megahash/s
[2014-05-04 08:14:07] Solved blocks: 0
[2014-05-04 08:14:07] Best share difficulty: 1.5M
[2014-05-04 08:14:07] Share submissions: 2352
[2014-05-04 08:14:07] Accepted shares: 2337
[2014-05-04 08:14:07] Rejected shares: 15
[2014-05-04 08:14:07] Accepted difficulty shares: 3346304
[2014-05-04 08:14:07] Rejected difficulty shares: 20864
[2014-05-04 08:14:07] Reject ratio: 0.6%
[2014-05-04 08:14:07] Hardware errors: 2
[2014-05-04 08:14:07] Utility (accepted shares / min): 4.42/min