Antminer S5 getting low hash rates

[ultramaman]

Hi,
need some advice here.

I've recently, over the weekend , got hold of an antminer s5. I'm using a thermaltake 730W psu with 2 separate railings for the 6 pin connectors. and i've made sure i connect a single blade to one  railing.

the issue is, i cant seem to get a decent hash rate. im averaging something below 50ghash . which doesnt make sense.  my other miners are on slush pools and im aware that i need to set the worker diff level in order for the pool to assign the work correctly , right ? so that works well for my s4 . but when i set the worker to 1024 , i cant a very low hash rate. i tried leaving it blank as well so that the pool can identify and assign work accordingly. that doesnt seem to help. i've also tried btcguild . that still gives the same results. i tried searching the forum for anyone with similar issues, but so far, cant find any.

any ideas, or advice ?

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[eretron]

Do you have some xxxxxx on miner status screen?

My bet is on the PSU. I had similar situation with 700W PSU. try another one, or try powering S5 with 2 PSUs at the same time. Just makensure that each psu is connected to only one hashing board.

[ultramaman]

my miner status all my asics are o

[notlist3d]

Try antpool and see what it does.  If it does not pick up to a faster rate.  I suggest uploading picture of configuration, and status.  That will help us know more.

Without pics, its harder to communicate what it looks like.

[ultramaman]

figured out that my psu is somehow not powerful enough for the miner. after adjusting the frequency to around 300 , im getting a decent hashrate of 850 to 900 Ghash .

thank you all for the advice .

im guessing, i just need to pick up a corsair. would a 750W corsair be enough ?

[notlist3d]

figured out that my psu is somehow not powerful enough for the miner. after adjusting the frequency to around 300 , im getting a decent hashrate of 850 to 900 Ghash .

thank you all for the advice .

im guessing, i just need to pick up a corsair. would a 750W corsair be enough ?

Yes 590 watts is the default on watt's needed.  - https://bitcointalk.org/index.php?topic=902305.0

750 gives it enough headroom it should have no issues.

[smit1237]

Solution is simple, reflash firmware, untick   "save settings", should be fine with any firmware.

[Rabinovitch]

How can it help in case of weak PSU?.. 

[pusilone]

 

[Rabinovitch]

There is one Russian IT rule: "seven problems - one reset". May be it's about that...  

p.s. but smit1237 appearantly offers an advanced version of that rule, where the reflashing is required.

[ultramaman]

i actually tried to reflash, first thing i did , i downloaded the firmware from the website and tried to reflash it, it came back with an error . short read.

but im curious why the psu that im using is not enough for the s5 . im using a thermaltake 730W with 87% efficiency . http://www.thermaltake.com/products-model.aspx?id=C_00001966

the s5 that im using was shipped to me on early april 2015. so im guessing it should have the latest firmware , right ?

[Amph]

i actually tried to reflash, first thing i did , i downloaded the firmware from the website and tried to reflash it, it came back with an error . short read.

but im curious why the psu that im using is not enough for the s5 . im using a thermaltake 730W with 87% efficiency . http://www.thermaltake.com/products-model.aspx?id=C_00001966

the s5 that im using was shipped to me on early april 2015. so im guessing it should have the latest firmware , right ?

if the psu is a low quality one it could be that, because the s5(it is overclocked?) run at 590 at default, no so far from 730(with bad efficiency 87), if it were a good psu with a better efficiency, like corsair or seasonic it would have been enough

otherwise i can only think of a defective device...

[Zich]

i actually tried to reflash, first thing i did , i downloaded the firmware from the website and tried to reflash it, it came back with an error . short read.

but im curious why the psu that im using is not enough for the s5 . im using a thermaltake 730W with 87% efficiency . http://www.thermaltake.com/products-model.aspx?id=C_00001966

the s5 that im using was shipped to me on early april 2015. so im guessing it should have the latest firmware , right ?

Your psu is single rail psu, so it's should be enough to powered 1 unit S5.
Try to check if there is any loose connector especially the ribbon cable.

[smit1237]

Ouch wrong suggestion, sorry

[GigaBit]

Hi,
need some advice here.

I've recently, over the weekend , got hold of an antminer s5. I'm using a thermaltake 730W psu with 2 separate railings for the 6 pin connectors. and i've made sure i connect a single blade to one  railing.

the issue is, i cant seem to get a decent hash rate. im averaging something below 50ghash . which doesnt make sense.  my other miners are on slush pools and im aware that i need to set the worker diff level in order for the pool to assign the work correctly , right ? so that works well for my s4 . but when i set the worker to 1024 , i cant a very low hash rate. i tried leaving it blank as well so that the pool can identify and assign work accordingly. that doesnt seem to help. i've also tried btcguild . that still gives the same results. i tried searching the forum for anyone with similar issues, but so far, cant find any.

any ideas, or advice ?

Go single rail... t'was the first thing I was told when I started mining...
ALWAYS go single rail.
You could power that miner with a 650w single rail PSU. (no O/C)
There is no way you should have problems with a 750w PSU but yeah...
You only 1 rail, you're a miner, not a train 

Hope you get it figured out.

[MyRig]

during the firmware reinstall, please select this option!