Post
Topic
Board Mining (Altcoins)
Re: GridSeed 5-chip USB miner voltage mod
by
nst6563
on 08/06/2014, 14:06:32 UTC
-snip-

Anyway...here's a pic where you can see the voltage test points and added heatsinks.

What happened to your heatsinks? It looks like they got run over by a truck...

LMAO! Well...yes and no....I had a fight with them.  They weren't agreeing to be cut up and it was the last heatsink I had of that variety that would fit with the height I had to work with.  Busted my last dremel cutoff wheel, so had to resort to the air powered metal saw I have...which the blades aren't that great for.  Didn't have a vice hear it, so I has holding the heatsink with pliers and a death grip.  In the end though...it's not the looks but the functionality I was after, an the scratches and marks just add to the effective surface area.  

I measured the 1.2vc mark and it reads 1.26v.  So if the chips were originally spec'd at 1.3v, there's some room to play with.  

As for IC's....I don't have a camera other than the one on my htc....but around the choke are all the same type of mosfet with the markings:
2R030
PEM
1349A6
4214

The other chip that looks to control the voltage is marked with:
0193
391
CCON

Since this is a Fury, there are NO markings on any of the ASIC IC's themselves.  The only other IC with markings is the Silab's USB interface - which from my understanding can support up to 1Mbps transfer rate however the Fury/Blizzard have it limited to 115200Kbps (could there be some performance gained by upping this limit??  It appears that the chips themselves are daisy chained to a nonce solved by the last chip in the chain has to travel through each chip before it and then to the interface....it could be possible that more data is flowing through the port than 115200Kbps can effectively handle I suppose).

:EDIT:  So it looks like the 0193 chip is possibly this TPS40193:  http://www.ti.com/lit/ds/slus719e/slus719e.pdf