Topic: S-5 review. It has arrived some info is in! - page 16. (Read 19866 times)

So far this review feels like a bit more of how to fix a broken miner with cooling you would do differently, and how to mod it.

I'm confused about the review thread a bit, nothing personal.. just constructive criticism..  Hopefully there is more to come in terms of testing the default clocks and cooling configuration..

I'm not 100% sure the single fan design is "dropping the ball"..   There was a discussion on cooling designs I read someplace here, and a fluid dynamics engineer chimed in and said that a pull only configuration will always be more efficient than a push pull configuration.  He said Fluid Dynamics Don't Lie.

Also.. you mention the Db of the unit, which is a nice thing to give.. but for the laymen.. it would be nice to get an opinion on the volume of the noise by comparison to other miners..  I don't have a Db meter handy, and if I did, I would probably be forced to try to replicate the Db you are giving with my SP20E to get a subjective understanding of how loud the miner is.

Anyway.. so far it seems that you think in your humble opinion that this miner is a dud, the cooling system is dysfunctional, and it doesnt run at stock clocked configuration so you are going to run it at a decreased  frequency because there is a problem with the stock frequency.   Did the miner shut down at the stock clocks?  did it perform over time as they stated it would in the stock configuration?

Did I miss anything?   I'm just playing devils advocate here trying to flush out a fully rounded review of the miner as it comes... plug and play.. and how it performs as intended.  

I know you want to customize this beast to your liking, but how much solid data have you collected in the way bitmain ships this miner?.  Eh, to each his own.. I know you aren't a dummy.  :-)

I ordered an S5 also.. kinda bummed after reading your thread but still excited to get it... We shall see..

Looking forward to your final conclusion of how the miner performed before and after you had a chance to fix it properly... It would be nice to hear more about the miner in its stock configuration though, and how it performs... unless you are convinced its broken by design.


Rich

cheap design, not good
S5 sux

If you are going to try out another fan, I'd hasten to suggest you look for one with deeper fins. They will provide a higher CFM at lower voltage and be quieter. For example, the stock NMB 4715KL fans that bitmain deploy are 1 inch (2.5 cm) deep, whereas a Nidec TA500DC is 1.5 inches (3.8 cm). If you can get a 2 inch deep fin / blade on the fan, I think you'll get an even better airflow + quieter for if you run them at less voltage.

PS. The Nidec TA500DC is not a 120mm fan, more like a 125mm fan, and on the S1's that I run it on, the holes do not fit those on the frame, however, it fits inside the frame and I attach them using double sided tape, that and the pull layout make it stick rather well. Additionally, I run them without the PWM (though they certainly have PWM as they are 6 wire). You can pick these off flea-bay for a pittance, shipped.

Philipma,

Do you know where the cgminer conf file is? I can't find it anywhere - seems to be a different file system to Bitmains usual setup. I want to change the --queue setting, it's set at 8192!!

Cheers.

no the silverstone is 4 pin pwm it is the pull fan.

I will order this as the push

http://www.amazon.com/gp/product/B00KFCRATC/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

these two as push pull should work

Ouch we are 0 for 2 so far on reviews.

Too damn right, if you clip a Nidec TA500DC with a resistor (to reduce voltage / amperage) you get a fantastic airflow / CFM with little noise. I think that is because the fins on the TA500DC are a bit longer (and more angled) than on the regular fans that bitmain deploy. I use a several of these on my S1's (don't laugh ... ) in pull position as replacement for the stock fans and they work wonders.

I could care less about the noise. How many watts are you drawing at 350 freq and what hash rate?

Biggest failure on the side of BitMain is that these miners are noisy. I guess SP20 wins this round.

Thanks for the Review. Spondoolies-tech must be doing cart-wheels right about now 

when you replace the stock fan with the silverstone you go from a PWN fan to a fan with tach only?  so the silverstone fans go full speed all the time?

what is the CFM of the silverstone?  Volts and amp rating?

I say this because bitmain uses off the shelf chinese brand server fans.  If you use delta or nidec brand fans, you will see a huge boost in cfm with minimal noise increase at stock speeds or better yet, you can slow down those (delta, nidec) fans and have minimal noise and decent cfm.

in the home theater room or the den.  thank you

You got this bad boy in the living room Phil?

ninja edit: congrats on the Legendary buddy!!

the sides of this are plastic and bend  they will prevent shorts (I think) but forget stacking on the side like you can do with s-3's


this is what I will run over night this uses 361 watts

okay I found a quiet 1200 rpm  120 mm pwm fan for the push  and I have the 140 silverstone for the pull

noise is tamed but I have a heavy under clock.  i need to do so more work but for now I will let it mine

dislike for the s1 style radiators, gives not so good feelings

curious if those extra ports for 2 more boards are working and if we can upgrade by buying just the boards and use s1 radiators....

just throw a 14cm fan on top of it, at the front!

now see this photo.  this is a huge mistake that bitmain did. if that jack was ½ inch taller 2 silverstone fans would make this gear really easy to mod.

I have complain about this more then one thread and others have mention this.  So someone dropped the ball here.
Especially  since this miner has 600 watts of heat to dump not 400.
The sad part is they decided to use 1 fast fan.  This was in my not so humble opinion a fuck up on their part.
I thought I would tame the sound of this miner with no real effort and I would like it better then the sp20e.  I will need to work hard to make the miner quiet.  Just think slap on 2 silverstone fans in 2 minutes and boom a quite or at least a pretty quiet miner with little or no effort.  Right now I unplugged the crazy loud stock fan and I am using the silverstone as pull.  very nice no issues.  but I downclocked to freq 225

I have a new mod in mind for the noise but that will be on tues.

okay added a silverstone as a pull fan.



slight clip to make it fit.


the control board takes 2x 4 pin fans



two fans.

dB isnt always the best way to do it - a 120mm fan can be loud but at a low frequency and seem much more tame than a 60mm fan at a higher frequency but lower decibles. The S2 used 140mm fans and had a sucking/whooshing noise that was very tolerable in a work environment compared with 120mm fans of similar airflow.

does the S5 have the ability to add a second fan? this could really improve the noise, as could a shroud for the top if airflow escapes that way

first mod is adding the silverstone fan  model  141 from amazon.

the stock fan is the same as always it is  set as a push fan.  It is a weird fan.  38 inches deep yet the blades are only 1 inch.  then a focus set of frozen blades . loud loud loud nasty sound!.

I set the silverstone as a pull and db dropped from 72 to 66 still very loud ,but a huge improvement on power 496 watts and 1077 gh

496/1077 = .4605 watts per gh  so I added the fan and the better cooling added about 100gh of hash.  I smell overclocking possiblites.

now this never happened with the s-1 or s-3 adding the silverstones dropped fan speeds and kept gh the same.  so the gear became quieter not more power efficient .  so the chain design may have a really good benefit if you don't have other issues.
based on this my impression is add a second pull fan asap.  we also need more people to see if this happens to their s-5
forget  all that that it dropped to the same