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Title: S4 Hardware Mod Bounty Post by: lovenlifelarge on July 19, 2015, 12:34:06 PM I would like to start a bounty to hardware mod (Pencil mod or other) to bring the S4 into the 481w at the wall for 1000gh @0.60 volt
Who would like to offer there services for the bounty?? & who would like to chip in for the bounty?? I would like to offer 0.5btc to start the bounty! Who's with me?? Title: Re: S4 Hardware Mod Bounty Post by: philipma1957 on July 19, 2015, 02:09:36 PM I do not think it can be done.
the chips are 1382 or s-3 chips. no one has made the s-3 hash at 0.48watts a gh. some good people have lowered the s-3 to .6 watts a gh which is 600 watts for 1th. I do not think you will get the s-4 much under 580 watts for 1th. Title: Re: S4 Hardware Mod Bounty Post by: -droid- on July 21, 2015, 02:47:57 PM yeah 580w for 1t on the s4 would be pushing it
Title: Re: S4 Hardware Mod Bounty Post by: notlist3d on July 21, 2015, 03:25:22 PM I would like to start a bounty to hardware mod (Pencil mod or other) to bring the S4 into the 481w at the wall for 1000gh @0.60 volt Who would like to offer there services for the bounty?? & who would like to chip in for the bounty?? I would like to offer 0.5btc to start the bounty! Who's with me?? We would all love to help. But as others said this is just a little far out there. I wish we could. But no one so far has got this level out of the S4. I hope someone finds a way though. Title: Re: S4 Hardware Mod Bounty Post by: sidehack on July 22, 2015, 12:08:58 AM If I had an S4 to mess with it'd certainly be fun to see what they could do at the bottom end. Unfortunately, broke miner is broke. I pretty much stopped buying new hardware with AM Tubes.
Title: Re: S4 Hardware Mod Bounty Post by: lovenlifelarge on July 25, 2015, 06:45:47 AM Maybe we need to approach the people behind the S1 mod for this???
The lowest clock i currently get is 640w @ 1th I'm deff thinking we will need a hardware / pencil mod for this Title: Re: S4 Hardware Mod Bounty Post by: RichBC on July 25, 2015, 08:03:33 PM The S4 has already got some very sophisticated programmable voltage control. It's based on the TI CSD95372 Synchronous Buck power stage and the TPS53641 4 phase PWM controller. So should already have accurate control over any voltage needed, no pencil mod needed here.
Unfortunately what is stopping this from being the case at the moment I do not know.... Rich Title: Re: S4 Hardware Mod Bounty Post by: sobe-it on July 25, 2015, 08:35:26 PM I do not think it can be done. the chips are 1382 or s-3 chips. no one has made the s-3 hash at 0.48watts a gh. some good people have lowered the s-3 to .6 watts a gh which is 600 watts for 1th. I do not think you will get the s-4 much under 580 watts for 1th. Exactly this. Best I have gotten was 300 gh @ 170 watts and after a few days it starts to drop chips, so basically every few days I have to restart it. Title: Re: S4 Hardware Mod Bounty Post by: lovenlifelarge on July 26, 2015, 03:09:32 AM Moving here
https://bitcointalk.org/index.php?topic=1134751 Title: Re: S4 Hardware Mod Bounty Post by: VirosaGITS on July 31, 2015, 08:00:10 AM Your best bet is probably giving a unit to Sidehack :P
Just sound like running it at 0.58j/gh might simply out of its operable window. Title: Re: S4 Hardware Mod Bounty Post by: sidehack on August 01, 2015, 07:17:45 PM If it's already got software-adjustable voltage (especially with multiphase) there's probably no hardware mods really feasible to increase efficiency any further. The S4+ gets a bit better performance because it doesn't lose 10% to VRMs, so getting the same out of an S4 isn't really possible except maybe at really low clock/voltage combos at a fraction of stock speed. Sounds like folks have already tested this extensively.
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