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Author Topic: Modding VR control on the s9?  (Read 647 times)
NotFuzzyWarm
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July 27, 2016, 01:22:02 AM
Last edit: July 27, 2016, 02:28:38 AM by NotFuzzyWarm
 #1

Has anyone paid attention to the power input area of the s9 hash boards? This detail I took from the pic of of the s9  board posted in the ad for it shows:


In the lower-left, doesn't that look suspiciously like a programming port for a voltage controller? The switching FET's are there under the heatsink (nice touch!) as well as a honking big inductor so I have to assume that the s9 does use a buck regulator.

Hmm. Curious minds have to wonder what might be done with that...

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NotFuzzyWarm
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July 27, 2016, 01:29:39 AM
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Reserved for later thoughts on this.

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philipma1957
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July 27, 2016, 02:09:17 AM
 #3

Reserved for later thoughts on this.

Man I could use a drop from .1 to .085 watts a gh.

let us know.

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July 29, 2016, 05:57:42 AM
 #4

It is an ISP header. I pulled firmware off the first one to come in the shop back in Batch 1, but since it was a customer machine I wasn't authorized to do anything that would void the warranty. Only enough to get the chip number and a firmware dump. I haven't seen what it'd take to modify my S7 firmware for an S9 but it's probably not difficult, I just don't have one to test it on.

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NotFuzzyWarm
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July 29, 2016, 12:52:22 PM
 #5

It is an ISP header. I pulled firmware off the first one to come in the shop back in Batch 1, but since it was a customer machine I wasn't authorized to do anything that would void the warranty. Only enough to get the chip number and a firmware dump. I haven't seen what it'd take to modify my S7 firmware for an S9 but it's probably not difficult, I just don't have one to test it on.
Tell ya what, I'll be getting 2 more when Bitmain has more s9's for sale so how about I have one drop shipped to ya to tinker with?

One thing I'd like to be able to tweak is the starting voltage. On my batch-1 and one batch-3 it usually takes a couple reboots to get all the cards firing on all cylinders. On the b1 it is card-3 (the usually hot one) but oddly enough on the b3 it is the middle card that needs a few restarts to get up to speed.

For bitcoin to succeed the community must police itself - Joshua Zipkin aka Joshua Alexander leaked AMT A1 miner skype chats
How a miner mfgr SHOULD operate: HaggsFIN trip to Canaan My info useful? Donations welcome! 1Fuzzyk398kDWVjuC5qPX5v6CjSkvbgAbd
-Support Sidehacks miner development. Donations to:   1BURGERAXHH6Yi6LRybRJK7ybEm5m5HwTr
sidehack
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July 29, 2016, 03:12:19 PM
 #6

Sounds like good times.

Got a new 28-135GH stick miner!
Currently in development - 100+GH USB stick; 800GH 60W pod; 6TH volt-adjustable S1/3/5 upgrade kit
Server PSU interface boards and cables. USB and small-scale miners. Hardware hosting, advice and odd-jobs. Supporting the home miner community since 2013 - http://www.gekkoscience.com
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