Topic: GridSeed 5-chip USB miner voltage mod - page 73. (Read 156988 times)

Thanks at all for giving out this nice mod.

my GS is running now at 1000mhz without hw errors 

Thanks for your complement!

I'm running cpuminer.
What kind of proof can I provide?
I can tell you that both modified miners have been running rock steady over 39 hours so far.
No errors except for a couple when first started for some reason.
Other than that, I have not seen any errors.

Wolfey2014

@Wolfey2014: Can you post a proof of your cgminer running for over 24hours ?

Would be happy to see that! As for now it looks like you did some real good work here .

Regards

"Thanks for the photos.  How safely can we mix and match these mods?  Right now I don't have an iron tip fine enough to do the soldering mods.  I either need to modify something or order something.  I am interested in the pencil mod and the fan mod tonight though.  Would this be safe? "

No, I don't believe the pencil mod will do any good without the other 3 mods.
Pencil mod is to adjust PLL voltage which needs to be corrected due to the offset caused by the two solder jumpers and the resistor is a timing adjustment to smooth out clock transitions at higher frequencies I believe.

You can make the 5V fan mod any time but remember, it's recommended for Scrypt only operation.
It has not been tested in SHA or SHA / Scrypt mining mode!

As usual, do these mods at your own risk!

Wolfey2014

Thanks for the photos.  How safely can we mix and match these mods?  Right now I don't have an iron tip fine enough to do the soldering mods.  I either need to modify something or order something.  I am interested in the pencil mod and the fan mod tonight though.  Would this be safe? 

Thanks Wolfey - this is helpful.

pics are not showing up.  

EDIT: Uh... yeah they are. Never mind.

ATTENTION!
PLEASE NOTE: This modification is no longer valid. It works but it is completely unnecessary work, now.
The latest and best mod can be found here https://bitcointalk.org/index.php?topic=519112.500
I've been hired and paid so far to modify 25 GS5's. I have decades of experience and expertise in solder / pcb work and re-engineering / improving / improvising current technologies.

If you'd like me to modify your pods for you to increase their performance by over 250%+ peak, let me know via PM and we'll take it from there. This is a stable operating - ZERO HW error / lost or invalid share making modification. It is a VERY PROFITABLE and ROI period shortening upgrade!

One new tip that seems to be working on my Windows 7 USB Hub connected laptop.
Turn Off FIFO Buffers in Device Manager. You don't need them. Open up your USB pipelines all the way and let them hash as fast as they can, efficiently and dependably.....So far my test has been running over 24 hours without interruption. I have seen slightly improved numbers at the pool due to this as well.
FIFO buffers can cause intermittent red-nonces as well, I suspect.

Live long, make profits!
w2k


*********************************************


Thanks for your kind words.
As I stated in my PM's back to you, .6W 39K should be fine.
The main purpose of the wattage spec of 1/8W resistor is that the physical size is not too big to fit and the wires on the resistor are not too big to fit over and solder to the solder points on the pcb.
De-solder the 36K and replace it with the 38/39K resistor. You can solder it across the two solder points put there for the resistor / capacitor network. They left the capacitor out during manufacturing so there are two extra points one can use to solder the resistor wire across them.

Simply solder the new resistor in place like I did in the attached pics.

Here are the pics of my handy work. Please excuse the left over resin (black stuff) around the resistor connections. I didn't have any pcb cleaner on hand at the time, but the resin won't hurt a thing as it is completely non-conductive. Just looks a little bit messy  
All mods  - Resistor - Jumpers - Pencil trace - 5V Fan connections


5V fan connections -
Red wire (+) intentionally connected to the tiny ferrite bead (FB25) as it's easier to solder to than any other point.
Fan start-up current is 140mA for 1.2sec then levels out to 78mA constant.
Tin your wire (if it isn't already) before you solder to the fuse terminal so as to keep from accidentally de-soldering the chip from the pcb. This way, it only takes a second to solder the wire to the terminal.

If this helps you, please feel free to show your appreciation by sending some coin.
Not mandatory but, very appreciated!
BTC = 13y5XhVuKGrRipbvYdcrvYDsx69rBPUbwR
LTC = LR6U7jB2Fb4pJYogbergqQHZgBRQ5UAqBG

Make these modifications at your own risk!

Peace!
Wolfey2014

Pea Ess, if you want me to make these modifications for you, PM me and we'll discuss it.
I am certainly qualified to do it, without bricking your pod of course!

Do you have a picture of a post number of this fan mod? I just got ten and at waist height they are running at 68 db. 

Hi wolfey2014,

I m watchich this volt mod thread for a while. Just wondering if you know why one GS hashing 600kh+ and if u have more GS , it will reduce the hash rate? Is it something to do with the power supply?

1mm atm, but will get a 04mm tip coming days

tip tip: use flux. its easy as cake with some flux

it's the one with the dot

What size tip are you guys using for your soldering iron?

hahaha yeah I'm gonna sue you from overseas just because you made me wanna do a mod 

anyway I also contacted a shop where I repaired my phone onces, mailed them the pic of the GS board and they can make the mod

but they want quite some moolah for it 15€

I'll wait to get my GS's and take a look at the board myself first

fukkum if they can't take a joke! 

I'm located in Maryland not far outside of Washington DC.

IF you're serious about hiring me to mod your pods, shoot me a PM.

Wolfey2014

Hey, thats slander! You'll hear from my laywer  Yeah, like I have one of those. LOL!

So where are you at Wolfey? I may partake on a few modded miners...

well, you know what litigious bastards we are over here

Like I'm going to say it's your fault if I mess up lol, hey what I do, I do

38k was not available only 39 or 33.

Will update when I'll have been able to do the mod.

thanks!

Okay, good show!
Remember, I am using 38k 5% with no errors. Your results may vary.
And of course, it's all on you if you fugg it up!

I'll be posting pics later after I mod another pod in the next day or so.

Wolfey2014

Ok, think I got them :

http://www.fadishop.eu/epages/ec2286.sf/es_ES/?ObjectPath=/Shops/ec2286/Products/%221006%20393%22