Re: GridSeed 5-chip USB miner voltage mod

Quote from: gtraah on April 22, 2014, 12:38:52 PM

Quote from: happydaze on April 22, 2014, 11:11:28 AM

On Crypto Mining Blog Jabberwock (April 6th, 2014 at 00:46) http://cryptomining-blog.com/1839-another-new-voltmod-update-for-the-gridseed-5-chip-btcltc-asic-miners/#comment-842 measured 33k for R139 (what we call R52 for easy reference).

Thanks Zig, this might be exactly what I've been hoping for. For me, I think it is easier to add a new axial resistor than to remove that tiny smd resistor. And, it could be easily re-bridged later if a SHA coin rises to and stays at the top of the profitability lists and you want to mine it.

Ok Guys --- ZigMod is official -

R46 Pads are bridged from factory

Image from Sandor11 & edited by Zig - R46 position is the pads on the far left all alone circled in black
https://ip.bitcointalk.org/?u=http%3A%2F%2Fi.imgur.com%2FKBfnITv.png&t=539&c=UEjhwR7D7EBeVw

Now you know where it is, unbridge the solder join at the pads with either a knife or sharp blade (GENTLY) . Once the join is cleary un-bridged you may now solder 17kohm 1% 0402 SMD resistor OR an Axial Resistor.

The Above according to Zig should give you 20w @ 510-515KH.

Thanks Zig, as this is your mod (Please correct me if I am wrong)

Guys the first person to try this please share with us your results and pictures preferably comparing the old mod side by side to see if both are to 2 and the same in performance and wattage

Thanks gtraah for your clarification/reiteration of the my proposal for simpler Voltage mod and Overckock...!

I am experimenting with this since March 13 ...when I received my first Gridseed ...my guinea pig...with trim pot
The reason I did not fix the value ...I am still searching for the sweet spot of STABLE operation ...for me it is NO HW errors at all...every HW error means your gridseed is like OFF...dead for this run of hashing...5-10-15 min of waste...lowering your effective hash performance...we are paid for Accepted shares ONLY...at the pool

I am searching for a value...and the corresponding Voltage to the chips...which will give LONG term ...24/7 with the BEST # of accepted shared per 24 hours... STABLE, no HW (0) errors...At the moment it is the 1150-1175MHz speed range... IMHO

ZiG

EDIT...:

I just put a name...to be able to make a reference to it...not to be confused with other/previous mods...

If I already shared this here...it is ALREADY OPEN SOURCE...It is already community effort/Mod ...it is OUR mod... Grin

Fill free to do/use as you may find fit...@ (at) YOUR own risk... Wink

Happy modding...