Just to recap, if the stock fan is the V34809, then with a top rpm of 5300 (and assuming a linear increase in CFM and dba), then to get to stock cooling levels you'd need:
(stock rpm / fan max rpm) * fan max CFM = Stock CFM
(3800/5300) * 220 = 157 CFM
Applying the same simplistic logic to the dba: (3800 / 5300) * 64.8 = 46.46 dba
Thus any fan that can provide over 157 CFM with a dba less than 40 would be better.
PS. I know I am most likely wrong, but please don't shoot!
Topic: S-5 review. It has arrived some info is in! - page 15. (Read 19890 times)
freq 300 has settled in at 999gh and 489 watts
I have a delta 3000 rpm 3 pin fan as the push it moves 113 cfm I have the silverstone 141 mm as the pull it is running at 1560 rpm
watts are 488/999 = .489 watt per gh
Here is my impression you must get new fans. as to the best fans over the next few days I will test for some.
temps are 57c and 54c in an 80f room.
okay 22 minutes in with a push pull setup at freq 300 we have
975gh
489 watts at kwatt meter
delta push fan is 3000 rpm
silverstone pull fan is 1560 rpm
temps are 57c and 54 c
db is 61 at 1 meter and pitch is okay
going to bump to freq 325
I have a delta 3000 rpm 3 pin fan as the push it moves 113 cfm I have the silverstone 141 mm as the pull it is running at 1560 rpm
watts are 488/999 = .489 watt per gh
Here is my impression you must get new fans. as to the best fans over the next few days I will test for some.
temps are 57c and 54c in an 80f room.
okay 22 minutes in with a push pull setup at freq 300 we have
975gh
489 watts at kwatt meter
delta push fan is 3000 rpm
silverstone pull fan is 1560 rpm
temps are 57c and 54 c
db is 61 at 1 meter and pitch is okay
going to bump to freq 325
That is a crap fan! It looks like the ones that ship with the AMT 1.2 miners (are they 12v 3A?) Do they have a sticker and care to post a photo?
The design of the safety /focus grill is what makes them whine (and therefore loud), but I suppose they were chosen because of the CFM they can output, but if running normally is 3800rpm .... then I wonder.
The design of the safety /focus grill is what makes them whine (and therefore loud), but I suppose they were chosen because of the CFM they can output, but if running normally is 3800rpm .... then I wonder.
good news I have a delta 3 pin fan a 38 mm runs at 3000 rpm. I put it in place of the four pin pwm fan and it is pushing at 3000 rpm. using the silver stone 141 mm to pull while loud it is not holy fucking shit loud.
So it is imperative to understand the stock fan sent to me is not usable in a home it is too loud and you must get better fans.
I now push at 3000 rpm since it ia a 3 pin it will just do that. and the silverstone is pulling at at 1440 rpm temps are 51.
So I think I can now do a higher freq testing. So I am jumping to freq 300
and so far freq 300 with new fan setup is good.
That is a crap fan! It looks like the ones that ship with the AMT 1.2 miners (are they 12v 3A?) Do they have a sticker and care to post a photo?
The design of the safety /focus grill is what makes them whine (and therefore loud), but I suppose they were chosen because of the CFM they can output, but if running normally is 3800rpm .... then I wonder.
EDIT: I think this is the fan (220 CFM 12v 3.3A max 64.8 dba) - datasheet => http://www.nidecpg.com/fanpdfs/va450dcf.pdf
the ones that ship with the AMT 1.2 are V34809-INT1F
The design of the safety /focus grill is what makes them whine (and therefore loud), but I suppose they were chosen because of the CFM they can output, but if running normally is 3800rpm .... then I wonder.
EDIT: I think this is the fan (220 CFM 12v 3.3A max 64.8 dba) - datasheet => http://www.nidecpg.com/fanpdfs/va450dcf.pdf
the ones that ship with the AMT 1.2 are V34809-INT1F
Okay just got back home from a party. I need to find a few other fans.
at freq 250 I do 824 gh and 404 watts that comes to .49 watts per gh.
I bounce to 416 watts which is .504 watts per gh this is good.
It will run too hot with my current fan setup if I go above freq 250. temps are 60c and 57 c
It is too loud stock! it runs hot at stock speed with stock fan. stock fan ramps to 3800 rpm and temps were over 60c for each board.
if you want db's 75 plus it is a nasty pitch.
my complaint is really simple here 2 silverstone 140's would allow it to run max speed and quiet. A no brainer 1 minute mod. instead I will need to fuck around with it.
If noise does not matter run it stock. It is louder then the s1 or the s3 it is as loud as the asic miner tube. So far at 225 ,250, 275, 300 and stock 350 it scales close to .51 or .52 watts
per gh. I am looking at the stock fan and it is a bizarre fan. It is 38 mm yet has 1 inch deep blades I have never seen a fan like this. I have to go back and correct part of the review.
3 shots of the my wife will kill me sounding stock fan. it has 38mm depth with 25mm blades then 13mm focus grill. it was pushing 3800 rpm at freq 350 worse sound of any fan I ever use for a miner.
at freq 250 I do 824 gh and 404 watts that comes to .49 watts per gh.
I bounce to 416 watts which is .504 watts per gh this is good.
It will run too hot with my current fan setup if I go above freq 250. temps are 60c and 57 c
It is too loud stock! it runs hot at stock speed with stock fan. stock fan ramps to 3800 rpm and temps were over 60c for each board.
if you want db's 75 plus it is a nasty pitch.
my complaint is really simple here 2 silverstone 140's would allow it to run max speed and quiet. A no brainer 1 minute mod. instead I will need to fuck around with it.
If noise does not matter run it stock. It is louder then the s1 or the s3 it is as loud as the asic miner tube. So far at 225 ,250, 275, 300 and stock 350 it scales close to .51 or .52 watts
per gh. I am looking at the stock fan and it is a bizarre fan. It is 38 mm yet has 1 inch deep blades I have never seen a fan like this. I have to go back and correct part of the review.
3 shots of the my wife will kill me sounding stock fan. it has 38mm depth with 25mm blades then 13mm focus grill. it was pushing 3800 rpm at freq 350 worse sound of any fan I ever use for a miner.
Nice work Phil. Keep the info coming.
There ya go petey, shoulda been more specific, the nidec fans I've used are mainly the standard TA500DC 38mm fans, so I couldn't imagine how you were thinking it had a 38mm fan blade inside a 38mm housing. I didn't know you meant the 51mm WIDEBODY TA500DC monsters that came out of old compaq servers etc.
Interestingly Nidec were also the OEM for the very popular range of watercooling fans in the Scythe GT range.
Anyway no harm no foul, just don't get your fingers caught in those suckers!
Interestingly Nidec were also the OEM for the very popular range of watercooling fans in the Scythe GT range.
Anyway no harm no foul, just don't get your fingers caught in those suckers!
It is really a ping pong thing to call the 38mm as the standard ones ..... 51mm one may actually be the standard ones, but never mind, though you should have thought of the 51mm ones seeing I'd suggested they had 38mm blades ....
But more interesting from your point of view, is what CFM + noise level would you get from those 51mm fans, bearing in mind that the ones that come from the compaq servers are 12v 2.7A they are bound to have a higher CFM rating than those in the 51mm datasheet, i.e higher than 190CFM (of course even the dba), BUT at a reduced voltage, the dba will be less (possibly less than the stock /silverstone running at medium), and the CFM too (but possible higher than the stock /silverstone running at medium); then there you have a good substitute.
Yes phillip is a tinkerer trying to get the best watt/gh ratio with low noise as possible. Its a refreshing approach, not one everyone always considers, but he'll probably be mining long after we give up from electrical costs 
I have to live with my miners too.. oh, and believe me.. I'm all about the underclock and the tinker..
I think out of the gate its pretty well understood that the design of this miner and the BM1384 is such that it has a narrow overclocking and underclocking potential when operating at 12v (In terms of watts per gh).. if he had his hands on a 9V 10A PSU, I would applaud him doing underclocking tests... and would bit sitting on the edge of my seat to see what he discovered and shared here. mod it up with a silent high flow low rpm fan.. neat! Thats the mod I want to see...
I'm sure there will be some in depth S5 modding thread(s) coming.. unless this one ends up being it..
Anyway, I'm interested to see where this review ends up in summation and final thoughts..
There ya go petey, shoulda been more specific, the nidec fans I've used are mainly the standard TA500DC 38mm fans, so I couldn't imagine how you were thinking it had a 38mm fan blade inside a 38mm housing. I didn't know you meant the 51mm WIDEBODY TA500DC monsters that came out of old compaq servers etc.
Interestingly Nidec were also the OEM for the very popular range of watercooling fans in the Scythe GT range.
Anyway no harm no foul, just don't get your fingers caught in those suckers!
Interestingly Nidec were also the OEM for the very popular range of watercooling fans in the Scythe GT range.
Anyway no harm no foul, just don't get your fingers caught in those suckers!
Just remember nidec have different models of the ta450dc although frame will not vary.
Worst case even if the holes don't line perfectly you can't beat 10 bucks shipped.
Yep they do, and more pertinent different depths.Worst case even if the holes don't line perfectly you can't beat 10 bucks shipped.
38mm - 120CFM max 43.1dba @ 2750rpm => http://www.nidecpg.com/fanpdfs/c2003_4546.pdf
51mm - 190CFM max 56.7dba @ 4000rpm => http://www.nidecpg.com/fanpdfs/c2003_4747.pdf
I was referring to the latter type (model A34538-90 but can not find its datasheet though plenty on fleabay!). Also the CFM & noise levels at the reduced voltage should be the ones that matter, as I am sure they will be better than the stock fans, possibly even the silverstone.
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.
Hello：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.
You can modify 'user_setting' file in /config directory to change --queue setting.
Just remember nidec have different models of the ta450dc although frame will not vary.
Worst case even if the holes don't line perfectly you can't beat 10 bucks shipped.
Worst case even if the holes don't line perfectly you can't beat 10 bucks shipped.
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.
Heat rises. Guess I'll be running 'em 90 degrees on their side (or upside-down on a wire rack) like the S3's. 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.
A superior pull configuration only works in the case is fully sealed. The S5 is not sealed, so a pull configuration would be horrible on it.
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.
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.
Umm.. not sure where you are getting your ideas from.
Its obvious just by looking at it that the S5 uses a 38mm fan, in fact the NMB 4715KL is a 38mm fan that pushes 130CFM@50dBA, not sure if thats what they are using on the S5 but nevertheless
Nidec TA500DC is a 127mm fan the 130CFM version is 48.8dBA and the 150CFM version 52.5dBA so not much in it.
The Silverstone is actually a better fan than both of them
Airflow: 42.8~171 CFM
Noise Level: 13.4~43.5 dBA(Max)
Even at max speed its more powerful than the Nidec and quieter than both, plus it uses the standard 120mm screw holes
Not saying its the best fan for the job, just that its not a bad one to try if you have it lying around from other stuff
1. The NMB 4715KL has a 38mm frame BUT the fan blades / fins are, like I said, 25mm. I know this because I've just measured one. And it is classified as a 120mm fan.
2. The TA500DC has 50mm frame and the fan blades are 38mm, just like I said. It may indeed be classified as a 127mm fan (against my 125mm), but my point was that the holes on it will not fit a with the frame of an S1, and possibly S5.
I have no claims to make towards comparative noise levels, but like I suggested, I clipped mine with resistors to reduce the voltage / wattage and they work wonderfully with my OC's S1's with little noise, much better than the stock NMB 4715KL (even with the blue wire hack!). I put that down to the size of the fan blades.
And by the way, there is no speculation in my comment, and therefore no chance of confusing / mixing numbers like you did, just un-udulterated observation.
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.
Are you sure that the network port if blocked if you use the Silverstone 140mm fan? I've replaced the front fan on my S3+'s with the Silverstone 140mm fan and it goes just to the bottom of the network port and with a unsleeved network cable it fits fine. If the S5 is the same as the S3 as I suspect, then it should fit even if others have said it doesn't. If it's just at the edge, shaving a mm off the fan should work also. With one in the front and rear, it should be able to have the Quiet setting on the fan for both and still have enough airflow (hoping).
Yes phillip is a tinkerer trying to get the best watt/gh ratio with low noise as possible. Its a refreshing approach, not one everyone always considers, but he'll probably be mining long after we give up from electrical costs
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.
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.
Umm.. not sure where you are getting your ideas from.
Its obvious just by looking at it that the S5 uses a 38mm fan, in fact the NMB 4715KL is a 38mm fan that pushes 130CFM@50dBA, not sure if thats what they are using on the S5 but nevertheless
Nidec TA500DC is a 127mm fan the 130CFM version is 48.8dBA and the 150CFM version 52.5dBA so not much in it.
The Silverstone is actually a better fan than both of them
Airflow: 42.8~171 CFM
Noise Level: 13.4~43.5 dBA(Max)
Even at max speed its more powerful than the Nidec and quieter than both, plus it uses the standard 120mm screw holes
Not saying its the best fan for the job, just that its not a bad one to try if you have it lying around from other stuff
Oic, from the pic I could only see three wires. Yea that fan works but at 24 bucks a pop that's super expensive.
I don't know if the board can handle the amps on the fan but you don't need to go full speed, you can get this for cheaper.
Dell BETA V TA450DC B35502-35 120mm x 38mm Fan Y4574 NIDEC
http://ebay.to/1B0zGIT
Or
Delta 12V DC 1.60A Fan Model : AFC1212DE
http://ebay.to/1B0zZ6x
I don't know if the board can handle the amps on the fan but you don't need to go full speed, you can get this for cheaper.
Dell BETA V TA450DC B35502-35 120mm x 38mm Fan Y4574 NIDEC
http://ebay.to/1B0zGIT
Or
Delta 12V DC 1.60A Fan Model : AFC1212DE
http://ebay.to/1B0zZ6x
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