... speaking of overclocking, here's some figures from overnight testing. This is using the stock push fan, with an additional pull fan added (although I question whether the pull fan is making any difference at all...) I've found, in my testing so far, that keeping the board temperatures <60C is required for stability. Room ambient temperature is 24C where the miners are working.   |
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mine has been stable with fan mods and underclock to 325. in a fairly cool room.
Testing out a theory that board temps <60C is required for stable performance. Have mine overclocked to 375 and running @ 55-58C for about 6 hours now with no problems. Tinkering and testing continues... |
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The Thermaltake fan has the molex adapter built in, and the Antec ships with a molex-to-3-pin-adapter as the Antec fan uses a 3 pin adapter at it's base. |
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You better hope you don't get a DOA like I did, there are NO RETURNS from bitmain. They will just try to bandaid the defective unit.
I've not yet had to deal with returns or warranty issues (I say this right as one of my B1 S3's has decided to fail hashing above 420GHs @ the default 218.75 clocks. All chips appear to be fine with no x's showing..) What methods have you tried to get this issue resolved ? It was to my understanding that Bitmain's warranty coverage and DOA policy was fairly decent, so I'm concerned by your report. I ended up slapping the stock push fan back on the hotter of the two units (left the Antec pull fan on for shits and giggles) and the unit is running ~7-10 degrees cooler without the Thermaltake push fan. Will monitor throughout the day. It appears that keeping the S5's under 60C board temperature is ideal. |
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Thanks for the review. Have you try to clock it up yet and see how those fans do?
Here's the cooler of the two units overclocked after 10 hours  One unit is running hotter than the other with identical fans at the default 350 clock. Might just slap the stock fan back on that hotter unit and see if that doesn't help things. If I get some time, I might decide to re-paste that one hotter unit as well. |
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as for noise, try the stock fan at 5V. it pushes a lot of air but becomes reasonable volume (still quite loud though)
How do I adjust the stock fans to operate this way ? |
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Does anyone know what a reasonable max temperature these guys could be running at ?
Is 70C way too hot ? Trying to keep them under 65C right now, but would be good to officially know the range.
Also, found a bug. Changing the frequency resets "Beeper ringing" to it's default checked state.
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NOTE: In this review, I play around with swapping out the stock fan for quieter ones. After ~24 hours of tinkering or so, I've concluded that it's best to leave the stock fan on if you are running default 350MHz clocks and above. Adding a pull fan makes little to no difference with the stock push fan. These units appear to perform best when run at a board temperature below 60C.--- Full Disclosure: I was offered a preview unit but did not feel right accepting one as I have been critical of the S3 launch. I purchased two Batch 1 units with the aim of replacing two older A1 28nm rigs, and hopefully getting it quiet and cool enough to run in a bedroom (tl;dr: Not likely even at 54dBA with quieter fans in push/pull) Background: I’ve been involved in home mining in since May of 2011. CPU mined my first block as a curiosity in August of 2010. Started with a dual AMD 7970 rig in 2011 and grew my farm out from there after learning of the Bitcointalk forums. Have been practically living in the Hardware section ever since, trying to keep up with the shifting landscape of mining hardware suitable for use in North American homes running on standard 115VAC residential circuits. My farm today: I’m practically at the limits of what my home is able to reasonably power, which gives me an approximate hash rate of about 12THs spread across Bitmain S2’s, Bitmain S3’s, A1 Clones, and SPTech SP20E's. --- Unboxing photos.      Stock fans are indeed loud. Way too loud to be near a bedroom (Measuring ~74dBA)  Off to experiment with some other fans.  --- Yep, that's better. Still too loud to be in a bedroom, IMO, but quiet enough to put in the living room.  591W at the wall   --- Much better with some different fans with manually adjustable flows. Have it set up nicely in a push/pull configuration.  Board temperatures have settled at 63/58 at room temp of 25C pulling 592W from the wall using a Corsair TX750M Bronze power supply. --- Initial Thoughts: Lots of room for improvement making the units quieter, but it performs to spec, and has lots of room for modding and tweaking. Will update this thread as I play with them more. Will definitely be looking to acquire a few more of these. Bitmain has another winner on their hands, and looks like the production issues faced with the initial S3 batches have been largely resolved if we take other reviews into consideration. Cheers, Bitmain ! Other reviews: philipma1957 - https://bitcointalk.org/index.php?topic=907219.0klondike_bar - https://bitcointalk.org/index.php?topic=908494.0bgibso01 - https://bitcointalk.org/index.php?topic=908483.0Syke - https://bitcointalk.org/index.php?topic=908126.0
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Got my S5's in ! Some fans I'm going to try playing with... More to come. Thanks Bitmain ! Look forward to putting these through their paces. Cheers. EDIT: Stock fans are indeed loud. Way too loud to be near a bedroom. Off to experiment with some other fans. EDIT2: Yep, that's better. Still too loud to be in a bedroom, IMO, but quiet enough to put in the living room. 591W at the wall So far so good !!! More later... EDIT3: Much better |
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I hope they're all executed
Dude... not cool. |
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 As usual, S5 will get better and better! I appreciate your honesty this round, unlike the initial 28nm launch with the original 440GHs S3's. |
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Gotta learn from the master!
You're not one to speak either, considering the launch issues beyond the S1. |
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... if they have spontaneous combustion issues with the S5 ...
One can only hope  Dude. Not cool. |
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WARNING
<snip>
With all due respect, please fuck off. Given your involvement with Hashfast, you have forfeited the right to sound alarms on these forums given your well known shilling and reality distortion. |
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It is embarrassing the demo unit arrived half dead. Since it's a demo unit, it was surely tested before shipping. Not a good sign at all... I've got a bad feeling about S5 B1's... Fuck that's bad. Surely it was merely "damaged in shipping" ಠ_ಠ My S5's just landed in Cincinnati, so with any luck, I should have my own review up by Wednesday. |
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Controller on the top again  Heat rises. Guess I'll be running 'em 90 degrees on their side (or upside-down on a wire rack) like the S3's. |
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I want a demo unit too.  bitmain approached me on the issue, likely due to participation in early batches of many previous units and some of the more useful portions of my posting history in thier threads. (whereas spondoolies effectively asked for legendary-only members to approach them instead). Either way, pretty interested to see what they produce, as I was a little cautious with this product since the fixed chip voltages limit modification without variable PSUs FWIW, I was offered a demo unit as well, but didn't feel right taking them up on the offer after being so critical of them with my S3 B1-B3 experience (responded with "if you'd like to ship me a demo unit anyway, feel free. Here's my account info on your website if you feel like looking it up...") I did end up purchasing two B1 S5's anyway (they are somewhere between Hong Kong and CONUS at the moment) and will be sure to report about them after I get 'em up and running. |
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Spondoolies folks,
I got a couple upset emails from the folks at DHL I thought I would pass along.
---
This is an import shipment.
Can you confirm who told you to fill and an export POA?
I am getting a lot of these requests the same as yours and just trying to figure it out.
I will forward your IMPORT request to the import team for process.
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