ANTMINER S5: 1155GH(+OverClock Potential), In Stock $0.319/GH & 0.51W/GH

[raskul]

Code:

[quote author=raskul link=topic=902305.msg10004481#msg10004481 date=1420142149]
i have updated my review of the S5.
it can be read here:

[url=http://rgsneddon.thescribe.eu/#post117]http://rgsneddon.thescribe.eu/#post117[/url]

It now seems to me, evident why the S5 is an open unit.
It is my presumption that due to the string design, the S5 struggles to cool properly.

[quote]
Update 01 January 2015
I have decided to downclock the S5 on account of my discomfort in the temperature of the unit. It is located away from my home in a garage and whereas in the daytime, I am able to leave the garage door open, I cannot do this at night.
The reason I am uncomfortable with the temperature is that when I checked in on the miner remotely this morning, temps had gotten to 80+ degrees - although the miner was still hashing at advertised rate, I was glad to be able to have the door opened. Tonight I have underclocked the unit to a frequency of 218.75 and it's doing ~750GH/s with temps at or around 50 degrees celcius. I do not have a meter to allow me to measure the wattage but will presume it's being quite efficient and also will stay at a sensible temperature overnight in a closed space.
[/quote]

[i]updated synopsis...[/i]
Q. would i recommend this miner?
A. I would recommend this miner only if the price is relative to a hashrate of 750GH/s

ADD: I would not run this unit at stock settings in my home - there is something about those plastic sides which make me a little apprehensive and feel this the S5 is only a few degrees away from giving out flames. 

ADD 2: all three of my SP20's (underclocked) were at 30degrees in and 57degrees out this morning. I have no fear about the safety of these.

ADD3: my SP31 was also perfectly fine temperature-wise and this is not an underclocked unit
[/quote]
not sure i would agree. The temperatures on my unit are just fine, and Im not really concerned at all with the heat of the unit. I run the fan on 5V and aim to have the board temperatures averaging around 60C. With a nearby window cracked slightly an intake of 5C allows me to overclock to 381.25MHz/1255GH without tripping my 612.5W PSU rail (fan is on a 5V rail so that frees up 12W+ for mining). With room-temperature (~20C) intake I have to operate at or slightly under the stock 350MHz.

The plastic sides would likely not deform until a minimum of 100C, and actual melting temp has to be well over 150C, or the temperature that the antminer shuts itself off or would otherwise be failing massively (which nobody has experienced yet). 

keep in mind that the SP20 temperature is more air temperature than the board. Asic stats show that the chips are 85C underclocked or up to 125C in normal operation. Antminer chips go into the 75-95C range I believe, and the sensors on it are likely in contact with the hot side of the heatsink. 55-60C is an ideal temperature for the S5, above 65C may spell trouble

that said, 80C is very high, is your garage warm?

I found that if you put a cover on the unit air crosses the heatsink instead of blowing out the top around the beaglebone.

thanks for that i'll add a plate to the top tomorrow morning.
yeah, the garage gets warm... 

[DevonMiner]

Am I right in thinking that your top SP31 is sucking in air from the PSU side, but the SP20s and S5 are doing the opposite and throwing air out?

Doesn't that get a little 'circular' ?

[raskul]

Am I right in thinking that your top SP31 is sucking in air from the PSU side, but the SP20s and S5 are doing the opposite and throwing air out?

Doesn't that get a little 'circular' ?

no they are all blowing the same direction

[Mudbankkeith]

A quick fix for cooling is to cannibalise an old S1 or S3 for an extra fan. The S1/S3 upgrade and the S3 push/pull was an easy solution.

[grn]

i have updated my review of the S5.
it can be read here:


ADD 2: all three of my SP20's (underclocked) were at 30degrees in and 57degrees out this morning. I have no fear about the safety of these.

Might re-think your confidence in sp20 safety, apparently they are at risk of causing electrical fire!

Thx guys, one cable end is fried, other 3 are slightly scorched.

shes running slightly better with offending cable removed, but the melted shroud is stuck inside the sp20 connector so i cant plug in another cable...

will have a proper fiddle later - 0230 here.

confusing as psu was pulling <900w while previously running MUCH higher watts without issue. (>1150w)



i'll upload pic in a minute.  meh. you all know what scorched connectors look like

[Guy Corem]

...
Might re-think your confidence in sp20 safety, apparently they are at risk of causing electrical fire!
...

Not my thread, I'll be quick. Using the SP20 with quality rated cables is perfectly safe.
We have thousands SP20s in the wild and it's the second reported instance. The first instance was confirmed as connector issue.

[Bitchardo]

s5 batch 3 is sold out i literally just tried to place an order for 18, and then "sold out".
I'm going to see when the next batch is shipping, otherwise I might try sp20s

[Subw]

Overnight, one of the blades curiously went xxxxxx xxxxxxxx xxxxxxxx xxxxxxo running at stock 350 with the temps at 63C. Rebooted and it's working OK again.

Hmmm.....I got back from New Years Eve celebrations earlier and noticed the same thing with mine, but all X's. They all came back after a reboot also, but it is a little worrying.....   Anyone else had this?

EDIT: Also at stock freq with temps @ 65.

that's alarming...

[aurel57]

Overnight, one of the blades curiously went xxxxxx xxxxxxxx xxxxxxxx xxxxxxo running at stock 350 with the temps at 63C. Rebooted and it's working OK again.

Hmmm.....I got back from New Years Eve celebrations earlier and noticed the same thing with mine, but all X's. They all came back after a reboot also, but it is a little worrying.....  Anyone else had this?

EDIT: Also at stock freq with temps @ 65.

Loud fans and now this... Waiting on my S5 to show up but someday I will learn not to order from the first couple of batches like I did this time and in the past.

[philipma1957]

Overnight, one of the blades curiously went xxxxxx xxxxxxxx xxxxxxxx xxxxxxo running at stock 350 with the temps at 63C. Rebooted and it's working OK again.

Hmmm.....I got back from New Years Eve celebrations earlier and noticed the same thing with mine, but all X's. They all came back after a reboot also, but it is a little worrying.....  Anyone else had this?

EDIT: Also at stock freq with temps @ 65.

Loud fans and now this... Waiting on my S5 to show up but someday I will learn not to order from the first couple of batches like I did this time and in the past.

mine has been stable with fan mods and underclock to 325. in a fairly cool room.

[Xian01]

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...

[raskul]

...
Might re-think your confidence in sp20 safety, apparently they are at risk of causing electrical fire!
...

Not my thread, I'll be quick. Using the SP20 with quality rated cables is perfectly safe.
We have thousands SP20s in the wild and it's the second reported instance. The first instance was confirmed as connector issue.

and i have quality rated cables on all of my miners, with a view to see if there may be something which could cause an issue - like an overheated string of ASICs.
meh.

[klondike_bar]

12hr average at eligius is between 1.23-1.25TH, miner has a fairly cool intake and a top shroud made of packing tape.

[philipma1957]

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...

yeah if you use the stock fan as a push and add a loud fast  pull fan you can do  387 to 406. staying close to 60c in a cool room

 Insanely loud close to 78db.

 which means testing overclocks  while the wife takes a shower so I don't have her complain about the noise.

If you have a cold place and loudness is not an issue the stock will run close to 4000rpm add a fast delta as a pull and good over clocks will work.

I used the stock to push running at 4000 rpm the 3 pin 148 cfm delta to pull at 3000 rpm.  this setup could do 406 freq in a fairly cool room.  If you had a cold room I think the unit could clock to 412-425.

[Syke]

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...

Sissy. 375 @ 68C for 30 hrs and counting...

[Biodom]

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...

Sissy. 375 @ 68C for 30 hrs and counting...

somebody has to push the envelope...

[cvokey]

So what could it run if the room is about -30C or lower?

[TracerX]

So what could it run if the room is about -30C or lower?

Just curious, how do you manage that temperature?

[Rabinovitch]

Oh, that's what we have just beside the window. )

[raskul]

update. S5 now clocked to 300 and running <1TH/s. temps are good as the garage door is open