GridSeed 5-chip USB miner voltage mod

[chup]

you cannot set individual speed on BFg only CGminer and Cpuminer

Actually, with bfgminer_gridseed_pr3 and  bfgminer-3-99-0-windows-clean You can. 
Syntax is either using serial number:

Code:

--set-device gridseed@XX72117B5XXX:clock=950

or path:

Code:

--set-device gridseed@\\.\COM25:clock=850

[ZiG]

what is better in long term in gredseed??
only bridge (1.25v) +2w 1000mhz
or replace the resistor 33kohm->47kohm approx +10w 1150mhz

Well...with the bridge you can probably still dual mine sha256 and scrypt if that matters to you.  I know with the resistor mod, you can't (specifically...the 3022m mosfet HIGHLY disagrees with it).  

Personally, I did the resistor mod, milled out part of the heatsink so it makes full contact with all 5 gc3355 chips, and ditched the crappy thermal pad for some decent thermal paste.  I'm running at 1225Mhz (521Kh/s) with 0 hardware errors now.  Scrypt only - I don't dual mine with this one.  I might dual mine with another just so I can get the fraction of a btc out of a pool.

Super nst6563,...Do you have just 1 ...@1225MHz... or more...?

BTC mining with this...I am not sure that it will pay for electric to run it...

[nst6563]

what is better in long term in gredseed??
only bridge (1.25v) +2w 1000mhz
or replace the resistor 33kohm->47kohm approx +10w 1150mhz

Well...with the bridge you can probably still dual mine sha256 and scrypt if that matters to you.  I know with the resistor mod, you can't (specifically...the 3022m mosfet HIGHLY disagrees with it).  

Personally, I did the resistor mod, milled out part of the heatsink so it makes full contact with all 5 gc3355 chips, and ditched the crappy thermal pad for some decent thermal paste.  I'm running at 1225Mhz (521Kh/s) with 0 hardware errors now.  Scrypt only - I don't dual mine with this one.  I might dual mine with another just so I can get the fraction of a btc out of a pool.

Super nst6563,...Do you have just 1 ...@1225MHz... or more...?

BTC mining with this...I am not sure that it will pay for electric to run it...

Right now I only have the one running at 1225Mhz.  I have another one coming in a few days which I haven't fully decided if I want to just do the bridge and dual mine, or do the resistor swap and only scrypt mine.  I'll definitely mill out that part of the heatsink so it makes full contact with all 5 of the gc3355 chips though.

[jamieb81]

IMO just go for scrypt, to much watt for Dual and returns too low. better run scrypt with latest 47k mod on high frequency

[happydaze]

It would be interesting to find out if our Gridseed 5 chip ASICs can be pushed to a higher level of performance in dual mode.

My take on things so far:

Dual mode does better than un-modded single mode.
1st volt mod basically equaled things out depending on your power costs.
2nd volt mod (single resistor) beats dual mode. Almost 25% better by my observations / calculations factoring in power costs.  I don't have any modded Gridseeds so I'm basing this on reported KH/s.

Is there a mod that could push dual mode in front or at least equal the income from the single resistor / single mode volt mod?

Unmodded Gridseeds can do 8.5 GH/s SHA-256 & 300 KH/s Scrypt in dual mode at 750 MHz which equates to .078 LTC per day per pod right now. You'd have to push it to something like 10 GH/s SHA-256 & 375 KH/s Scrypt or 9.5 GH/s SHA-256 & 400 KH/s Scrypt to equal the the single resistor / single mode volt mod mining income.

Are you guys with volt modded pods getting close to 0.1 LTC per pod per day right now?

[jamieb81]

I'm not getting 0.1ltc per pod no. if someone does please give me the recipy 

[nst6563]

I think the gridseed could possibly handle the first mod (bridge + voltage=1 in command line) to reach 1000Mhz and dual mine.  I don't think I'd push it farther than that though.  I tried the dual mining mode on mine with the resistor mod.  The Ubiq m3022m mosfet on mine blew the instant dual mining kicked in.  That part is a real bugger to find in the US, but luckily I was able to cross-reference a part from TI (CSD17552Q5A N-Ch 30v mosfet) that met most of the original specs and it's back up and running now at the 1225Mhz scrypt only.

As far as I know, I'm not getting .1ltc a day either, just a little less actually.  I've been using Clevermining and just switched to Multipool to try them out since they have Cryptsy integration.  In the past 15 days I've gotten 0.02552966 BTC from Clevermining.  I only have the single gridseed plus an nvidia gtx 560se (98kh/s).  My ati card bit the dust unfortunately.

[jamieb81]

I'm going to give this pool a try

http://en.manicminer.in/

merged mining scrypt pool

[happydaze]

My .078 LTC dual mode might net .06 LTC after power costs.  I have to factor that in and conveniently seem to forget it sometimes.  If the single resistor / single mode mod even nets only .075 LTC per pod per day then you are still way ahead.  Easy 25% better.

Thanks for the info re: not pushing it too far.  I don't have the skill set to do any repairs.

[XScrypt]

Just because a few people have successfully pushed their devices to 1000+ with these mods doesn't mean you will have similar success. Depending on how stable the components are on your gridseed, mods may even degrade performance.

As an example, the bridge mod is supposed to push the stable overclock from 850 to 950. I have two gridseeds running with just the bridge mod. One runs perfectly fine pushed to 1000 (1 or 2 HW errors per 24 hours). The other I can only push to 925 (any higher and I go from 0 HW errors to multiple HW errors per hour). The only difference is the 925 one came from a later batch.

EDIT: This is not to say that modding won't get you any benefits. In most cases, modding will allow you to get more hashing power. However if your expecting to order 10 gridseeds and mod them thinking you're going to get 1200 MHz out of each one then you may be in for some disappointment.

[david123]

Well, what Hashra says doesn't matter so much. Do you get 510 poolside as well?

[coinminer69er]

I posted an idea here:https://bitcointalk.org/index.php?topic=482352.msg6222366#msg6222366 to resolve the shoddy work on the heatsink/pcb design in regard to it not making contact with all 5 GC3355 chips due to two components that are taller.

It's easy (if you have a steady hand) and takes about 5 minutes...afterwards you have perfect contact to all 5 GC3355 chips.

... and for your reference ...:

My post just above nst6563 post...explaining the reason for a bad contact between the chips and heatsink...

https://bitcointalk.org/index.php?topic=482352.msg6208700#msg6208700


Good job, nst6563...

What are your results after the mod...any improvements...?

ZiG

ZiG, I saw a post where you had said you were able to run up to 1000MHz stable with the thermal mod above. Is that without doing any of the voltage mods? TIA

[Xer0]

any one here measured the USB power draw of the device?

[Firebird2000]

you cannot set individual speed on BFg only CGminer and Cpuminer

Actually, with bfgminer_gridseed_pr3 and  bfgminer-3-99-0-windows-clean You can.  
Syntax is either using serial number:

Code:

--set-device gridseed@XX72117B5XXX:clock=950

or path:

Code:

--set-device gridseed@\\.\COM25:clock=850

That would be great if I could figure this out!

Can you post an example command line for me? I have 10 gridseeds and need to try and figure this out.

Thanks!

Also, how do you get the serial number for each one?

[simon66]

you cannot set individual speed on BFg only CGminer and Cpuminer

Actually, with bfgminer_gridseed_pr3 and  bfgminer-3-99-0-windows-clean You can.  
Syntax is either using serial number:

Code:

--set-device gridseed@XX72117B5XXX:clock=950

or path:

Code:

--set-device gridseed@\\.\COM25:clock=850

That would be great if I could figure this out!

Can you post an example command line for me? I have 10 gridseeds and need to try and figure this out.

Thanks!

Also, how do you get the serial number for each one?

:/

If you look at exactly 1 page ago, I posted the full command.

Here, just in case you missed it

You can actually. I haven't found how to set only 1 with many units connected to the same instace but you can run this command here:

Code:

bfgminer.exe --scrypt -o ltc.give-me-coins.com:3333 -u username -p password -d gridseed -S gridseed@\\.\COM3 --set-device gridseed:clock=1000

@\\.\COM3 is the COM port for your device.

Kinda running late, I'll expand more when I get back from work.

[volder]

Is anyone interested in buying my modded Gridseed 5 Chip ASICs? I have 30 of them, all modded and running 1188MHz with 49.9k SMD, modded by me. Combined they run 15.15Mh/s. I bought 5 Gridseed Blades and they will be here on Friday.

[ZiG]

I posted an idea here:https://bitcointalk.org/index.php?topic=482352.msg6222366#msg6222366 to resolve the shoddy work on the heatsink/pcb design in regard to it not making contact with all 5 GC3355 chips due to two components that are taller.

It's easy (if you have a steady hand) and takes about 5 minutes...afterwards you have perfect contact to all 5 GC3355 chips.

... and for your reference ...:

My post just above nst6563 post...explaining the reason for a bad contact between the chips and heatsink...

https://bitcointalk.org/index.php?topic=482352.msg6208700#msg6208700


Good job, nst6563...

What are your results after the mod...any improvements...?

ZiG

ZiG, I saw a post where you had said you were able to run up to 1000MHz stable with the thermal mod above. Is that without doing any of the voltage mods? TIA

Yes, buddy...

This is what I am doing first...test them as they come...stock...no mods...@850MHz ...to check how good are they...each one...

Second...:  Apply the thermal mod...Paste...new, thicker, better thermal pads...shims, if nesessary...TEST again...Most of them are going to 950 min...1000Mhz...NO volt mods yet...!

Out of 10 => 4 @ 1000...4 @975...1@950 ...1 slacker @925MHz ...NO HW errors...this is my belief that every HW error is lost...non submited...unpaid work...this is like your miner STOPPED for this period of time...5-10-15 min...so I opted for NO HW errors at all...

Voltage mod next...I am using my own...Test again...etc...

Capisco...?...

It is just me...you could create your own test/mod...

Cheers...Beer here...

[ZiG]

Is anyone interested in buying my modded Gridseed 5 Chip ASICs? I have 30 of them, all modded and running 1188MHz with 49.9k SMD, modded by me. Combined they run 15.15Mh/s. I bought 5 Gridseed Blades and they will be here on Friday.

Price...?

Why do you think that the Blades are better...Any advantage...except integration...

Any overclocking potential...ideas...?

[volder]

I'll sell them for a competitive price, especially if one person buys them all. I'm thinking maybe $125 each shipped? Someone let me know if I'm way off, but I think that's a good deal.

I only bought the blades because it's less devices to manage and less cables. I don't have them in hand so I can't comment on any headroom or potential yet. They are the same chips that go into the Gridseed 5 Chip miners. I just like the blade form factor better.

[david123]

What is your location, volder?