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Author Topic: Second hand S5 for Bitmain, are they worth ?  (Read 3769 times)
kingcolex
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August 14, 2015, 10:19:12 PM
 #41

The problem for me now is that I still need to buy the BTC. I need approximatively 1,5 BTC but with credit card it's problematic :/.

No one you can buy Bitcoin from, or not ready to afford the cost on services such as Circle?

Not everybody lives in the US.
Is there no equivalent in your nation? It could be a good business opportunity to be the first in your area if you can get the seed money.

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VirosaGITS
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August 14, 2015, 10:23:04 PM
 #42

The problem for me now is that I still need to buy the BTC. I need approximatively 1,5 BTC but with credit card it's problematic :/.

No one you can buy Bitcoin from, or not ready to afford the cost on services such as Circle?

Not everybody lives in the US.
Is there no equivalent in your nation? It could be a good business opportunity to be the first in your area if you can get the seed money.

I don't live in the US. So that's not a very good reply to my comment. If you elaborate then maybe i/we can help.

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August 15, 2015, 05:37:28 PM
 #43

The problem for me now is that I still need to buy the BTC. I need approximatively 1,5 BTC but with credit card it's problematic :/.

No one you can buy Bitcoin from, or not ready to afford the cost on services such as Circle?

Not everybody lives in the US.
Is there no equivalent in your nation? It could be a good business opportunity to be the first in your area if you can get the seed money.

I live in France, there's a service which is equivalent but which is limited to 100€/week/user. Plus it needs to have the 3D Secure enabled, something I don't have.

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August 15, 2015, 05:42:09 PM
 #44

The problem for me now is that I still need to buy the BTC. I need approximatively 1,5 BTC but with credit card it's problematic :/.

No one you can buy Bitcoin from, or not ready to afford the cost on services such as Circle?

Not everybody lives in the US.
Is there no equivalent in your nation? It could be a good business opportunity to be the first in your area if you can get the seed money.

I live in France, there's a service which is equivalent but which is limited to 100€/week/user. Plus it needs to have the 3D Secure enabled, something I don't have.

Well then come to #cryptofr on freenode, i'm sure several users there can help you.

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August 16, 2015, 10:41:12 PM
 #45

I got me a second hand miner; I'm glad they do still offer the option because I move a lot of product and S5's are a hot commodity right now.
Plus, there's my own mine I need to upgrade constantly.... but I still run S1/S3's still.
It's like buying a second hand car from the OEM dealer, they will give you a problem free car... or as close as it gets.
I like this better than new because you save a bit off day one and the unit came off of a production line; working the same day it was boxed.
So I know I get a working tool... cuts away from DoA's or outright lemons.... which happens a lot in this industry, not just Bitmain.

I wished Bitmain had done that on S3's..... I don't think I'm going to sell any anymore, they are prolific AltCoin block finders.

-I'd rather be mining
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August 18, 2015, 06:04:55 AM
 #46

Has anyone can share information regarding secondhand s5 ? What hardware version is sent out?

v1.1   2014-12-03
v1.3   2014-12-15
v1.5   2014-12-20
v1.7   2014-12-22
v1.9   2015-01-08
v1.91  2015-03-28
v1.91  2015-03-28 -With mini heatsinks

Thanks.
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August 18, 2015, 06:24:00 AM
 #47

Has anyone can share information regarding secondhand s5 ? What hardware version is sent out?

v1.1   2014-12-03
v1.3   2014-12-15
v1.5   2014-12-20
v1.7   2014-12-22
v1.9   2015-01-08
v1.91  2015-03-28
v1.91  2015-03-28 -With mini heatsinks

Thanks.

Hello, if you tell me where to look i'll tell you. Unless its on the Controller, not the PCB. The controller says 1.5.

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August 18, 2015, 07:16:18 AM
 #48

The designation is given in the upper right corner of hashing board.
In the following topic you find photographs:
https://bitcointalk.org/index.php?topic=1151460.20
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August 18, 2015, 08:58:39 AM
 #49

The designation is given in the upper right corner of hashing board.
In the following topic you find photographs:
https://bitcointalk.org/index.php?topic=1151460.20

Hah i see, its written very small on my PCB so i missed it in my haste.

They are latest, 1.91 without mini heatsinks. (Read: from 1 miner)

Ethereum Mining Calculator - Simple, elegant, mobile-friendly Ethereum Mining Profitability Calculator
gpuShack mining hardware - Your one stop shop for all GPU mining related hardware! Use Coupon Code VOFF5 to save on any order.
ethOS - #ethosdistro on freenode - linux distro that mines Ethereum out-of-the-box.
usenet
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August 18, 2015, 09:14:03 AM
 #50

The designation is given in the upper right corner of hashing board.
In the following topic you find photographs:
https://bitcointalk.org/index.php?topic=1151460.20

Hah i see, its written very small on my PCB so i missed it in my haste.

They are latest, 1.91 without mini heatsinks. (Read: from 1 miner)

Thanks,
I was afraid that sell older equipment . So for now this is the last version .
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August 18, 2015, 09:15:17 AM
 #51

The designation is given in the upper right corner of hashing board.
In the following topic you find photographs:
https://bitcointalk.org/index.php?topic=1151460.20

Hah i see, its written very small on my PCB so i missed it in my haste.

They are latest, 1.91 without mini heatsinks. (Read: from 1 miner)

Thanks,
I was afraid that sell older equipment . So for now this is the last version .

I don't think they would lie, they said it was batch 5 and newer equipment "only" used for 40 days. But to be thorough it would be nice if a few extra users confirmed they are indeed all 1.91s.

Ethereum Mining Calculator - Simple, elegant, mobile-friendly Ethereum Mining Profitability Calculator
gpuShack mining hardware - Your one stop shop for all GPU mining related hardware! Use Coupon Code VOFF5 to save on any order.
ethOS - #ethosdistro on freenode - linux distro that mines Ethereum out-of-the-box.
usenet
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August 18, 2015, 09:22:08 AM
 #52

The designation is given in the upper right corner of hashing board.
In the following topic you find photographs:
https://bitcointalk.org/index.php?topic=1151460.20

Hah i see, its written very small on my PCB so i missed it in my haste.

They are latest, 1.91 without mini heatsinks. (Read: from 1 miner)

Thanks,
I was afraid that sell older equipment . So for now this is the last version .

I don't think they would lie, they said it was batch 5 and newer equipment "only" used for 40 days. But to be thorough it would be nice if a few extra users confirmed they are indeed all 1.91s.

I think this is important because 1.91 has the underclocking possibility. More is mentioned in the link that I pasted .
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August 18, 2015, 02:27:08 PM
 #53

The designation is given in the upper right corner of hashing board.
In the following topic you find photographs:
https://bitcointalk.org/index.php?topic=1151460.20

Hah i see, its written very small on my PCB so i missed it in my haste.

They are latest, 1.91 without mini heatsinks. (Read: from 1 miner)

Thanks,
I was afraid that sell older equipment . So for now this is the last version .

I don't think they would lie, they said it was batch 5 and newer equipment "only" used for 40 days. But to be thorough it would be nice if a few extra users confirmed they are indeed all 1.91s.

I think this is important because 1.91 has the underclocking possibility. More is mentioned in the link that I pasted .

Hah i see. Thanks for mentioning this. I was tired last night and just scrolled till i saw the pictures you were mentioning. Currently i'm more interested in overvolting than undervolting. My electricity cost make it so undervolting would just be a waste currently. (Overclocking to 393.75 shows only marginal efficiency GAIN instead of loss and i get 1.31~ pool side, probably because the fan doesnt take more and the PCB efficiency stays the same up until)

However it sound like fun and something to keep in mind if i cap my few breakers. I wouldn't mind testing it out for fun meanwhile. This also mean undervolted, you could run with some low CFM completely silent fans and have minimal hashrate loss during most of the year here.

I mean, no stock performance loss at 11.5v? But 20% less power draw!? That sound crazy to be honest. Deliberate attempt at reducing their hardware performance from Bitmain?

Could undervolt to 11v 300mhz for complete silentness during summer? Yeah 150-300GH loss isin't such a bad cost for saving your ear drums if you mine in an apartment like me.

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gpuShack mining hardware - Your one stop shop for all GPU mining related hardware! Use Coupon Code VOFF5 to save on any order.
ethOS - #ethosdistro on freenode - linux distro that mines Ethereum out-of-the-box.
neegeeboo
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August 21, 2015, 06:06:01 AM
 #54

Only worth it if it's hashing well and you can get it at a decent price, or else... No!

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August 21, 2015, 06:23:01 AM
 #55

Only worth it if it's hashing well and you can get it at a decent price, or else... No!

Well the bitmain unit is no longer for sale, thus its hard to continue this train of thoughts.

I received one and thats it even though i could be interested in a second one.

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August 23, 2015, 04:01:28 PM
 #56

The designation is given in the upper right corner of hashing board.
In the following topic you find photographs:
https://bitcointalk.org/index.php?topic=1151460.20

Hah i see, its written very small on my PCB so i missed it in my haste.

They are latest, 1.91 without mini heatsinks. (Read: from 1 miner)

Thanks,
I was afraid that sell older equipment . So for now this is the last version .

I don't think they would lie, they said it was batch 5 and newer equipment "only" used for 40 days. But to be thorough it would be nice if a few extra users confirmed they are indeed all 1.91s.

I think this is important because 1.91 has the underclocking possibility. More is mentioned in the link that I pasted .

Hah i see. Thanks for mentioning this. I was tired last night and just scrolled till i saw the pictures you were mentioning. Currently i'm more interested in overvolting than undervolting. My electricity cost make it so undervolting would just be a waste currently. (Overclocking to 393.75 shows only marginal efficiency GAIN instead of loss and i get 1.31~ pool side, probably because the fan doesnt take more and the PCB efficiency stays the same up until)

However it sound like fun and something to keep in mind if i cap my few breakers. I wouldn't mind testing it out for fun meanwhile. This also mean undervolted, you could run with some low CFM completely silent fans and have minimal hashrate loss during most of the year here.

I mean, no stock performance loss at 11.5v? But 20% less power draw!? That sound crazy to be honest. Deliberate attempt at reducing their hardware performance from Bitmain?

Could undervolt to 11v 300mhz for complete silentness during summer? Yeah 150-300GH loss isin't such a bad cost for saving your ear drums if you mine in an apartment like me.

Now I'm more interested in overclocking possibilities than underclocking . At temperatures of 10-20 degrees Celsius at frequencies above 400 MHz you can get an average of 1.345 THs easy with fan between 3200-3720 rpm depend on the unit.
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August 23, 2015, 04:36:15 PM
 #57

Thank you for your thoughts, but sadly they're no longer for sale  Cry. I came too late.

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August 23, 2015, 04:57:55 PM
 #58

Thank you for your thoughts, but sadly they're no longer for sale  Cry. I came too late.

there are plenty here in Marketplace: hardware threads from reputable people and with escrow if you want it.
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August 23, 2015, 05:10:54 PM
 #59

Thank you for your thoughts, but sadly they're no longer for sale  Cry. I came too late.

there are plenty here in Marketplace: hardware threads from reputable people and with escrow if you want it.

well one problem will be is the v1.91 with under clock may be harder to buy. but other then this used can be found.

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August 23, 2015, 05:15:06 PM
 #60

i believe that S5 Miners now worth just 1BTC and will go lower after release of S7 soon.
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