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That's a great mod right there!
Those corsair fans should be as quiet as a whisper, and with a re-oriented S7 they could possibly do a wonderful job. I wonder though, what temps do you get with the S5? Also, what is the amperage rating on those corsairs?
Thank you. They really are very quiet. Probably the best choice for this. Especially due to their high static pressure. Temps go about 65-70°C at 400MHz. At 350MHz they're down at about 50-55°C, not requiring the fans to go 100%. If I manually set them to be 100% at all times, than temps are even lower. Amperage of Corsairs is 0.36A/fan. It seems that all the links are currently dead, does anybody have pictures backed up or anything? I am looking to swap out the fans on my S7 and was going to use this as a semi guide. I have gotten it very quiet so far using only 33% fan.
I may have photos archived somewhere. If I find them, I'll replace them. Is there a place to purchase the 3D printed duct/spacers I see in some of these pictures? I've searched ebay, with no luck.
I don't think anybody's printing them for sale. Usually they just order a 3D printing service for themselves. After testing that everything works, I've put the miner up for sale on ebay: http://www.ebay.com/itm/151918302055 |
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Bitmain themselves ought to look at the benefits (or lack of) of that design and produce a next gen miner quietly suited for home mining.
I think I should make a video of the miner I'm planning to put for sale soon. Even with stock software configuration (350MHz, auto fans), the fans don't need to rev up to 100%. Runs so quiet you can have it next to your bed. Even when set to 400MHz fans don't go all the way to 100%. They go to about 85% and stay there. With 350MHz, fans can be manually set to as low as 60%. The fans are these so they are very quiet at 60%:  So if Bitmain wants to make a quiet 600W miner for home mining, that design would be perfect. Actually, here's a few quick shots: Front:  Back:  Top:  Mini heatsinks, installed by Bitmain. Very small series of miners was made with these and that is what helps this miner to run very cool. It doesn't help a lot, naturally, but it makes a noticable difference.  |
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Chips at the back of the miner will always be very hot and will depend only on air, instead of termal conduction of a large heatsink. Meaning that they will overheat easily and thermal adhesives tend to lose their grip on higher temps. Which can end in heatsink unsticking from the chip.
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May be a good reason to try a new configuration with the S7 ... as in having the fans strapped at the top / bottom top rather than front / rear (that'll require the unit being stripped though as top and bottom are sealed). That way, I suppose, even the fan specs can be downgraded as the distance to exhaust has been more than halved. (just a thought!) This, in fact, would be a much better solution. If miner was built to have 4 or 6 slower fans, blowing from the bottom-up, it would be very quiet and air's shorter travel distance would make sure that chips "in the back" (actually on the top in this case) would not be much hotter compared to the chips next to the intake. However, such miners wouldn't work for most common setups, those being shelves or racks. Should I get an S7, I'll most definitely move towards modding it in such way. But the first thing I'd check is if it is possible to get those heatsinks off. Bitmain seems to really struggle with heat dissipation. I had a heatsink design which would cool 4 blades with a single fan, but couldn't get it extruded so I went with 3D printing.  One of the best directions with cooling solutions I saw is the Block Erupter Prisma's design. With a major pitfall, though - large hole in the middle of heatsinks, allowing the air to avoid going through the fins. |
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Hi Vorta - have you tried using your mods on S7 yet ?  Hi citronick! Haven't got S7 yet. When I've seen how they made heatsinks for it I was repelled from buying it. Chips at the back of the miner will always be very hot and will depend only on air, instead of termal conduction of a large heatsink. Meaning that they will overheat easily and thermal adhesives tend to lose their grip on higher temps. Which can end in heatsink unsticking from the chip. If I ever get S7, that will mean I'll try to get all heatsinks off and get my own heatsink design extruded. |
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I used exactly the same like your blue ones, just in black. Those were the largest mini-heatsinks I could fit on the chips. The ones that Bitmain used, however, are much better because they perfectly fit the copper area, and are even larger. My "green" miner, which features these heatsinks, is about 4-5 °C colder than the "black" one, which features black mini-heatsinks (photos in first post). Unfortunately, I haven't found the heatsinks Bitmain used for sale anywhere.
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Yes, they should go onto the copper plates. These heat up as much as the chips do. I used Arctic Alumina Thermal Adhesive. Much better heat conduction than thermal adhesive tape, and won't unstick at higher temps.
I was looking into selling them in Europe. I wasn't selling abroad before so I don't know how would the shipping go. The last thing I would want to see happen is miner arriving broken to the destination.
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Sorry for late response. The effect really is minimal. However, there is some. I'd prefer to have my miner with mini heatsinks rather than without. But that's just me. Anyway, I'm going to sell both of my miners now. Including the 3D printed mods. I've also managed to make them work very quiet while still being quite cool. The recipe is: 2 Corsair SP120L (not without L) fans, exhaust side fan duct and top & bottom enclosure of miner's heatsing. The front fan is screwed directly onto the miner while the pull fan pulls the air through the fan duct. The pull fan does all the cooling (it can work without) and the push fan gets some heat off the external heatsinks. With stock frequency I can have both fans working at 70%, which is very quiet, and miners would have HW errors as low as what they usually get with stock fan and stock frequency. With fans at 100% I can overclock the miners up to 393.75MHz for a stable 24/7 run. I'll post some photos of that setup/build soon. |
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Thanks very much for your response - I thought for a while you were managing to keep your 400Mhz miners under 60°C in a warm ambient environment! It was the hottest day so far, when I took this screenshot. Because of the mods you'll get smaller temperature differences between the chips on the intake side and exhaust side, and you also get better cooling performance as you get more air through the heatsink, thus extending the lifetime of the miner and especially the chips at the back side. If you want to play extra safe because of the warranty, just install the mods and keep the miner at 350MHz. It will be optimal for your miner. I'm pushing mine very hard. So far without dead chips or other issues. I've found that some miners can go to higher frequency than others, before their hash rate starts falling. Currently my 400MHz miner is at 58/62°C because it's ~25°C in the room. |
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I've updated my miners and since then they've been constantly blinking red lights but they are hashing perfectly.
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Printed off the 2 ducts and have them mounted with 2x Ultra Kaze's. Here's a comparison: Old setupKaze Pull + Stock push + no ducts = ~53°New setupKaze Pull + Kaze push + 2 ducts = 63° / 59° (there's a few degrees difference between both boards strangely..) Are the above temps expected with my new setup? I was expecting a bit cooler, especially in this air conditioned environment. It's possibly worth noting I don't have top or bottom plates due to printing difficulties. Edit: temps have risen to 65° / 61° now  The temperature readouts are expected to be higher (more accurate) when there is no airflow hitting the temp sensors. It may seem that your miner is hotter, but it isn't, you just get the actual temps. Should you put your own temp sensor on the heatsink, you would see the difference. Since miners are optimized to have a temperature reading that is 20°C off (from my experience with stock fan, your miner is actually around 100°C when readout reaches 80°C), the bottom duct has small openings to move some air around the temp sensors and lower the temps on them a bit. I have one miner running at 400MHz without a problem in a room that is reaching 45°C during the day. The other one, however, has an older heatsink and I can't push it as hard.  It's happily working at 381.25MHz. Both of my miners regularly have a 5°C difference between boards. I'm unsure if it's the cheap temp sensors or the difference actually exists, I haven't tested. The best way to see how well is the miner running is to compare HW errors. Up the frequency and let it run for several hours. As long as you're under 0.01% HW errors, you're good. Here's how's my 400MHz running:  |
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Is ~1.4 BTC the price BitMain is usually charging for miners?
I paid my first miner 1.34 BTC in April and the second one was 1.423 BTC, in May. Each was $340.
I've never seen S5s go over 1.5 BTC.
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I'm using Super Flower Leadex Titanium 1600W for my 2 overclocked S5s. 4 fans + 2 S5 @ 400MHz are drawing ~1350W from the wall thanks to the PSU-s extremely high efficiency. It also handles voltage drops without any effect to the miners. It happens in the area where miners are that voltage drops from 230V all the way down to 180V. So far miners were never affected. http://www.pohrani.com/f/2l/9g/1bg084Mk/psu.jpgHow many PCI-e cables does it come with? Do they sell them in the U.S.? It comes with 4 cables, enough to power 2 miners. They should sell them in U.S., but I suggest some research on that. |
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I'm using Super Flower Leadex Titanium 1600W for my 2 overclocked S5s. 4 fans + 2 S5 @ 400MHz are drawing ~1350W from the wall thanks to the PSU-s extremely high efficiency. It also handles voltage drops without any effect to the miners. It happens in the area where miners are that voltage drops from 230V all the way down to 180V. So far miners were never affected.  |
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i got my set today from jstefanop.
they look just like the OPs.. mine came black.
i was only able so far to put the top and bottom plates on as i coudlnt find the right size screws for the fans...
You can use original screws that came with the miner, just get them though your fan as described in the first post. If you can't get them through the fan, you need screws that are 40mm + fan depth/thickness. M4 thread. i dont think the fan screws are long enough? i guess i can take it apart and check.. but i figured they were too short to go through the fan and the fan shroud. . If you got the screw through this way, it will be long enough:  This is not intended to be used with the stock fan, but it will work. The temperature readout will be more accurate, thus a bit higher than before. |
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i got my set today from jstefanop.
they look just like the OPs.. mine came black.
i was only able so far to put the top and bottom plates on as i coudlnt find the right size screws for the fans...
You can use original screws that came with the miner, just get them though your fan as described in the first post. If you can't get them through the fan, you need screws that are 40mm + fan depth/thickness. M4 thread. |
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Hey Vorta, thanks for the heads up on the heat sinks - I was searching around for something good like that, but hadn't found anything close with nice big fins like that. I just submitted an offer, so we'll see how it goes - I'd love to update all my S5's to use then, but first I'll see how much of a PIA doing one of them is.  One thing I was wondering about was the placement - if you see on the image with my thermal camera, those heat dissipation squares on the PCB are actually fairly cool, it's the surrounding area that really heats up. Here's a closeup of that area on one of the newer PCB's (the one in the test case is an older S5): http://www.analogx.com/images/laserS5v1/flir0069.jpgThe actual thermal squares are running a cool 105-115f range, whereas the area immediately surrounding it is in the 160-180f. I'll be interested to see what kinds of difference they make - I'll try some with just thermal paste first and see what they do. I can't tell if those regions are cooler because they're more effective at dissipating the heat (I'd be surprised if it were that pronounced), or if there were a heat sink there if it would absorb and radiate some of that surrounding heat. With your ducts, did you play around at all with sizing the ports that you're using to the sides? I know you have one with and one without the sides, but just wondering if you played with larger vs smaller openings. Also, did you play around with different lengths? Mine is 5.6mm but only because that's the thickest material I had around - I could easily just use multiple ones to get more length, but wasn't sure if the gain between 5.6 and 25mm would be worth it (I read somewhere that you reached peak duct performance at 25mm for case fans, but who knows). I hope they'll work for you as well. You're looking at ~1h of sticking all 60 of them. They are quite small but they seem to be working quite well in my case. Anything else that I found to fit on the PCB had much shorter fins. Your thermal camera is very useful. I wish I had one while playing with my miners. This temperature find is quite interesting. Since the area is in direct contact with the chip it doesn't make sense to be so cold and you can get a burn on touch. Can the material on the surface affect camera's thermal readout? When I was developing the duct I played around with several parameters. I tried different lengths and went for the one that is short enough for a 40mm screw to hold along with the fan. I didn't go with smaller as this is really minimum. I couldn't make it smaller without affecting the airflow too much. I also tried different openings for the sides and realized that the most effective size is the one that just makes the air move instead of standing there, but nothing more. Outside heatsinks are completely ineffective compared to internal heatsinks, so you don't want to waste too much air on them. I have my miners running for days, overclocked at 400MHz, in a room which reached temperatures of 45°C during the day this week, without overheating or a jump in HW errors. Hotter miner reached 79°C with hottest chips at 93°C actual temperature. So I can definitely say for myself that the duct properly serves the purpose I made it for. Default miner is not certified for ambient temperatures above 35°C at stock clock.   The reason I did it was more because my pull fan would hit the screws on the back of the case, so I wanted some spacing. I believe what I've read is that around 1 inch (for case fans) is ideal length, anything more doesn't buy you anything - but I was surprised to see such a small space made such a big difference.
Why not cutting your own back of the case?  |
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Very nice indeed! Good work with all that! I see you also took the Scythe Ultra Kaze fans. They really are the best choice. What I would suggest is try getting some mini heatsinks to glue them on the outside and see if that drops the temps. In your case they should drop them more than they do in open case versions. On my first miner, which came without external heatsinks, I used these: www.ebay.com/itm/171764372281. Glued them on with this thermal adhesive: http://www.ebay.com/itm/111172816819I got a price of $30.00 for 60 heatsinks, so if you're buying them, make sure you click "Make offer" instead of just buying them at stated price. I would definitely prefer to have acrylic side panels on my miners. You have me a very nice idea. |
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Vorta, did you do any fan mods?@
Yes, I have (ended up doing this). 2x Scythe Ultra Kaze (push-pull) has proven to be the best in airflow vs. sound ratio. You'll also be able to overclock your miner. Push-pull combination will always work better than any push-only configuration on the S5 because of a lot of air escaping the heatsink before reaching it's end. I would recommend not buying Deltas as they are very loud. I would also not recommend overclocking the miner while using only one fan. Unless you have an infrared thermometer to monitor the temperatures of chips in the back of the miner ensuring they don't go over 90°C as you're testing the frequencies. Sounds as though BitMain should have put the thermostat at the back of the unit because those chips get so much hotter. or smartly... run the fan from the back to the front Wouldn't doing that just make the other end of chips run higher? Whichever end is further from the fan will just run hotter, no? True, the thermometer is in the middle of the hashboard so whichever end the fan is on you get the same readout, but the chips next to the fan are colder than the readout, and chips on the back side are quite a bit hotter. The best solution would've been if there were 3 thermometers per hash board, one at each end and one in the middle. |
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Hi I'm new to the world of bit mining hardware, and want a relatively decent miner for hobby. Looking at geting ths Antminer S3 or S5. If I buy from the Bitmain "Antminer S5 Batch 5", do I like wait until they meet a sell count threshold, or do they ship next business day? https://bitmaintech.com/productDetail.htm?pid=00020150303095018716e2uWKIA70662Im skeptical about the S5 because I live in a room share in california where its warm in the summers, and apparently the S5 is NOISY. Is there a fan i can buy at frys to make this thing a whole lot less noisy (I think I could deal with heat generated)? The alternative is buying an Antminer S3 on Ebay. Significantly less GH/s but im okay with this, as it will primarily be for hobby. And it doesn't seem to have the same noise issues as the S5? Insights are welcome Thanks for all wisdom. S5's fan is noisy. You can find some fans that might cool your S5 with less noise. At stock clock, S5 generates considerable amount of heat and requires a lot of airflow to dissipate it. A lot of airflow = a lot of noise. I've read about some people underclocking their S5 to have it's fan working at lower RPM. If you go to 0:20 of this video, you can hear how loud the original fan is compared to 2 Scythe Ultra Kaze fans: https://www.youtube.com/watch?v=eBtvmuRuuHoHow would you deal with generated heat? AntMiner S5 is pretty much like a 500+W electric heater. |
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Vorta, did you do any fan mods?@
Yes, I have (ended up doing this). 2x Scythe Ultra Kaze (push-pull) has proven to be the best in airflow vs. sound ratio. You'll also be able to overclock your miner. Push-pull combination will always work better than any push-only configuration on the S5 because of a lot of air escaping the heatsink before reaching it's end. I would recommend not buying Deltas as they are very loud. I would also not recommend overclocking the miner while using only one fan. Unless you have an infrared thermometer to monitor the temperatures of chips in the back of the miner ensuring they don't go over 90°C as you're testing the frequencies. |
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