only problem is that they do have one of the best machines as there is not much good alternative...  to be hunest If I was in there position I would probably also say take it or leave it. I dont care  BITMAIN's hardware is fine, the problem is the software is very lacking, and when they include a PSU with a miner it's never good enough. The S4's PSU is a joke, and should really not be run at any settings higher than stock. Stock is even too much for some of them. I never had an S2, but that was also an underpowered (though brand name) PSU. Here's a free suggestion, BITMAIN: On your next big miner, also include external PCI-e connectors on the back of the unit so we can easily replace your PSU when it fails if it isn't a standard form factor PSU. |
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Bitmain, can you please fix the long outstanding bugs with the S4 before releasing an S4+? Worst bug of all being the J7 connected hash boards getting wayyyyy overvolted. I guarantee that contributed to a lot of dead PSUs. The S4 sucks a lot more power from the wall than it needs to because of that bug!!!
Bitmain doesn't seem to care. Furthermore, the hardware is junk. They told me their supplier of PSUs only offers a 90 day warranty. That's why they won't offer you and me more than 90 days on the PSU. I'm done with Bitmain, and I advise everyone else to proceed with extreme caution with considering purchasing Bitmain hardware or services. They've lost their way, and they don't care. M I know they don't care, in fact I've found out that the thing I've been whining about for the last month (voltage control not working in latest firmware) was done intentionally by BITMAIN, yet they (BitmainWarranty anyways, though he may be unaware) pretend their firmware developers are working on a fix.  This was done, undoubtedly, to protect themselves (and retards who don't know better) from dead PSUs from overclocking/overvolting. Frequency was also supposed to be locked down in the Jan. 29th firmware, but their lock didn't work on that for some reason. I find it deplorable that BITMAIN is gimping our hardware intentionally. How the hell am I supposed to undervolt/underclock and stay competitive with a locked firmware, BITMAIN?!? Anways, that's all I'll say on the subject for the moment. I've been fuming mad at BITMAIN since I found out how they're intentionally breaking our S4s and I'm working on a very revealing thread concerning S4s and BITMAIN's lovely practices. About a week ago I asked for pledges/donations to get this fixed independently, and not a single person even offered to chip in. Well, I've footed the bill myself and all my S4s are fixed with working voltage adjustments working on the latest firmware. For this reason, I haven't been in any rush making my thread regarding BITMAIN and the S4 situation. Now, it looks like I'll be waiting for the official S4+ thread to come along, should be a nice sister thread. I'll make sure it stays stuck to the S4+ thread until all these S4 "issues" are fixed. What do you think, BITMAIN? Do you want a shit load of negative publicity and lost S4+ sales from that thread, or would it be better to get off your asses, apologize to us, and fix our intentionally broken S4s once and for all? By the way, here's a look at what proper, non-BITMAIN sabotaged S4s look like with real PSUs:  Your move, BITMAIN. |
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Bitmain, can you please fix the long outstanding bugs with the S4 before releasing an S4+? Worst bug of all being the J7 connected hash boards getting wayyyyy overvolted. I guarantee that contributed to a lot of dead PSUs. The S4 sucks a lot more power from the wall than it needs to because of that bug!!!
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Will the S4 take 240V in?
Yes. Does anyone know where the temperature sensor is on an S4 hash board?
there are 2 types of s4 hash board, which one is yours? put your board pic in here and i will show you temp.sensor is where. or you can find well with fine look LM75A 8pin SMD ic.  There's actually 3 that I know about, 1 is PCI-e version, next is nut/bolt version, and the last is a screw down terminal. I don't have pictures on hand, but thanks for telling me what to look for. The reason I ask, is that I have reversed the fans in My S4s, so that exhaust is in front of the S4 (where the screen is) and now I'm probably over cooling the temperature chip and getting a false reading of the actual board temps. I'll have to do some testing to be sure, but I might have to put them back as they were originally and just have the S4s sitting backwards on my shelf. Speaking of dust, I bought 2 used S4s this week from someone local in Montreal who was running 16 S4s in a "data center". I've never seen more disgusting hardware in my life! Dirt was literally baked on everything, the picture doesn't really do it justice especially since the top of the hash boards were the cleanest part. Take a look: Pre-cleaning (middle and bottom were much worse): https://i.imgur.com/RUyQBlH.jpgAfter cleaning and installing a proper replacement PSU: https://i.imgur.com/e1xsEde.jpgAnd now she's purring: https://i.imgur.com/WgjcaKB.pngI wish I would have weighed the S4 before and after cleaning. No kidding, there must have been a pound of dirt and filth in there. I'd love to see where this person is running their machines. This unit actually had a huge defect, BITMAIN used a wrong nut and one of the 12v connections on a lower hash board was completely loose. It barely even touched the bolt's threads, slipping right off when trying to tighten it. I've never seen this nut before in an S4, so some asshole at BITMAIN's assembly line was too fucking lazy to get off his ass and fetch a proper nut right before he finished his shift on a Friday night. The wire's terminal was completely charred along with the nut and washer, the rubber insulation almost completely melted away, and the hash board looks damaged but works fine as far as I can tell. I don't know why I didn't take pics, but I still have the charred connector on the PSU if anyone wants a look. I'm putting the blame on BITMAIN since, judging by the sorry state the S4 was in when I got it, the previous owner had never bothered to open it up. Amusingly, somehow both units PSUs still worked even though they were stuffed with dirt/dust. Pretty funny considering I run my other S4s in a clean environment with very little dust, and I've had 4 out of 5 PSUs die on me. Edit: Just noticed that you can see the charred washer in the second picture, beside the screw driver's handle. Hi Prelude, What is your PSU? I have a few PSU's here but they have PCI-e connectors. Do you know how I can convert the wires to connect to the screws in that series of S4? Is it as simple as cutting the wire and screw it directly on the board? Thanks! All of my S4s are powered by IBM 2000W server PSUs. Yes, you could cut your wires, but then forget about selling your PSUs down the line. Personally, I would find a quality PCI-e 6 pin to 8 pin GPU adapter with at least 3x 18AWG wires and cut that instead of cutting the PSU's wires. |
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Does anyone know where the temperature sensor is on an S4 hash board?
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I'd have a few of them if they weren't so overpriced.
This. They look & perform great, but like you say - the price just ain't right  Nice guide - great work!  Yep. They'd sell by the boatload if they were priced better. |
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Thanks for the review. I'd have a few of them if they weren't so overpriced.
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I'm not familiar with minerslab. How long ago did you place the order?
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If this is an April fools, they got me as well!  Of course it is LOL. |
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Thanks for the image. Not free, but pretty cheap at about 0.07c USD. I'd have to figure out if it would be worth it to run them overvolted, and for how long. That is cheap. BTW I have found what caused the difference in HW errors between the two images. Namely, I used a different postdivider in the formula that determines the clockspeed. Shouldn't matter, but somehow it does So I don't know if you tried the latest yet, but you should see a difference. I've written the new image to SD cards, but haven't swaped them yet. Let's hope it helps! I'll let you know. |
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I know from experience how warm the terminals on a DPS2K can get when drawing full power through all EIGHT power blades. You're drawing how much power through four? I would not recommend what you are doing there, nor would I trust it to not be a fire risk.
Agreed. Why only use half of the available pins? Clean setup, though. |
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Just used OgNasty's escrow service for the first time, thanks for the great service! I know where to go when I need escrow from now on. Edit: I'd also like to thank teeGUMES for his extremely quick shipping, very smooth transaction. |
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Try L: pi P: innosilicon
~10 LTC sent to your vanity address  Many Thanks! Wow, thank you very much! |
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There is a rumor that S4+ will soon be available. Dear BITMAIN, we want (and need) new chips. New miners. Not polished old hardware like S3++, S4+... p.s. and please don't forget about S2 uprade kits. Any more details on this rumor? |
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Pool still exists
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There is also a newer model of hash board where the eyelet is screwed down instead of using a nut.
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Powerful kano crushing scammer dreams.  |
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Searing,
Are you generally drunk or high when you post? Genuinely curious, no offense intended.
just type fast as i can think .guess you guys are not much into 'whimsy' huh? put me on /ignore others do......no issues with that...... Like I said, no offense intended. I have nothing at all against you, and from what I've managed to read of your posts you seem like a nice guy. And I do try to read your posts, but I always end up going cross eyed.  Keep on keepin' on, searing. (what I'd give to be a fly on the wall while your English teacher graded your papers LOL) --------------------------------- Back on topic... ME, details please! |
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Speaking of dust, I bought 2 used S4s this week from someone local in Montreal who was running 16 S4s in a "data center". I've never seen more disgusting hardware in my life! Dirt was literally baked on everything, the picture doesn't really do it justice especially since the top of the hash boards were the cleanest part. Take a look: Pre-cleaning (middle and bottom were much worse):  After cleaning and installing a proper replacement PSU:  And now she's purring:  I wish I would have weighed the S4 before and after cleaning. No kidding, there must have been a pound of dirt and filth in there. I'd love to see where this person is running their machines. This unit actually had a huge defect, BITMAIN used a wrong nut and one of the 12v connections on a lower hash board was completely loose. It barely even touched the bolt's threads, slipping right off when trying to tighten it. I've never seen this nut before in an S4, so some asshole at BITMAIN's assembly line was too fucking lazy to get off his ass and fetch a proper nut right before he finished his shift on a Friday night. The wire's terminal was completely charred along with the nut and washer, the rubber insulation almost completely melted away, and the hash board looks damaged but works fine as far as I can tell. I don't know why I didn't take pics, but I still have the charred connector on the PSU if anyone wants a look. I'm putting the blame on BITMAIN since, judging by the sorry state the S4 was in when I got it, the previous owner had never bothered to open it up. Amusingly, somehow both units PSUs still worked even though they were stuffed with dirt/dust. Pretty funny considering I run my other S4s in a clean environment with very little dust, and I've had 4 out of 5 PSUs die on me. Edit: Just noticed that you can see the charred washer in the second picture, beside the screw driver's handle. |
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