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Title: Modding VR control on the s9? Post by: NotFuzzyWarm on July 27, 2016, 01:22:02 AM 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:
https://i.imgur.com/jOtS2fw.png 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... Title: Re: Modding VR control on the s9? Post by: NotFuzzyWarm on July 27, 2016, 01:29:39 AM Reserved for later thoughts on this.
Title: Re: Modding VR control on the s9? Post by: philipma1957 on July 27, 2016, 02:09:17 AM Reserved for later thoughts on this. Man I could use a drop from .1 to .085 watts a gh. let us know. Title: Re: Modding VR control on the s9? Post by: sidehack on July 29, 2016, 05:57:42 AM 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.
Title: Re: Modding VR control on the s9? Post by: NotFuzzyWarm on July 29, 2016, 12:52:22 PM 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. Title: Re: Modding VR control on the s9? Post by: sidehack on July 29, 2016, 03:12:19 PM Sounds like good times.
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