Topic: Ethereum mining still profitable? - page 28. (Read 131303 times)

Quote from: coinyard on May 24, 2016, 05:55:08 AM

but the question is, if i undervolt my 390s will that impact the hashrate? Currently I should be able to get roughly 32 MH/s per 390. If I undevolt , will it still hash at the same rate or will it be less?

Yes, hashrate will be the same. Only problem is if you go too low on the voltage, it will just keep crashing.

Nice. Thanks. Is there a detailed guide for undervolting an R9 390 somewhere? Something that tells me what the best settings are?

You can use the MSI afterburner to undervolt 100mV for both the Core and memory controller.

I use Sapphire Trixx to reduce the core voltage by 200 mV, that will save more energy. But the Core frequency is less than 978 MHz.

The problem with Sapphire Trixx is that it cannot reduce the VDDCI. So I use both afterburner and trixx.

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but the question is, if i undervolt my 390s will that impact the hashrate? Currently I should be able to get roughly 32 MH/s per 390. If I undevolt , will it still hash at the same rate or will it be less?

Yes, hashrate will be the same. Only problem is if you go too low on the voltage, it will just keep crashing.

Nice. Thanks. Is there a detailed guide for undervolting an R9 390 somewhere? Something that tells me what the best settings are?

You can use the MSI afterburner to undervolt 100mV for both the Core and memory controller.

I use Sapphire Trixx to reduce the core voltage by 200 mV, that will save more energy. But the Core frequency is less than 978 MHz.

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Quote from: QuintLeo on May 24, 2016, 01:05:27 AM

but the question is, if i undervolt my 390s will that impact the hashrate? Currently I should be able to get roughly 32 MH/s per 390. If I undevolt , will it still hash at the same rate or will it be less?

Yes, hashrate will be the same. Only problem is if you go too low on the voltage, it will just keep crashing.

Nice. Thanks. Is there a detailed guide for undervolting an R9 390 somewhere? Something that tells me what the best settings are?

You can use the MSI afterburner to undervolt 100mV for both the Core and memory controller.

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Found something interesting in NVidia-smi last night - it shows the wattage (AND the TDP limit) as part of it's standard list (-l option) command.

Dual GTX 950s in one box, the one that X is actually running on eating about 85 watts, the other one about 75, running about 10MH/s each with no undervolt and stock clocks (they DO seem to be autoboosting quite nicely, and I DID kick the fan settings up to something SANE).

It's too bad I've not seen something similar on any of the Windows-based utilities to date.

Undervolting CAN reduce your "maximum" hash rate if you take it far enough because you can't clock the card as high - but sometimes the gain in efficiency is worth it.
MINOR undervolting well tend to allow you to maintain hashrate while using a little less power.

ANY undervolting tends to reduce heat, which is a GOOD THING from a longevity viewpoint, as long as you don't go too far and completely brick the card.

interested about the wattage display, what is the command exactly?

never mind found it http://cryptomining-blog.com/tag/nvidia-smi/

very good wattmeter is useless now, it report 150w for 1 970 mining etheruem at 22MH, better than expected, i was thinking about 160w

also if we count that g1 gaming consume a bit more than reference and especially more than mini itx 970, because they add more component and 3 fan, it's even better

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Found something interesting in NVidia-smi last night - it shows the wattage (AND the TDP limit) as part of it's standard list (-l option) command.

Dual GTX 950s in one box, the one that X is actually running on eating about 85 watts, the other one about 75, running about 10MH/s each with no undervolt and stock clocks (they DO seem to be autoboosting quite nicely, and I DID kick the fan settings up to something SANE).

It's too bad I've not seen something similar on any of the Windows-based utilities to date.

Undervolting CAN reduce your "maximum" hash rate if you take it far enough because you can't clock the card as high - but sometimes the gain in efficiency is worth it.
MINOR undervolting well tend to allow you to maintain hashrate while using a little less power.

ANY undervolting tends to reduce heat, which is a GOOD THING from a longevity viewpoint, as long as you don't go too far and completely brick the card.

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but the question is, if i undervolt my 390s will that impact the hashrate? Currently I should be able to get roughly 32 MH/s per 390. If I undevolt , will it still hash at the same rate or will it be less?

Yes, hashrate will be the same. Only problem is if you go too low on the voltage, it will just keep crashing.

Nice. Thanks. Is there a detailed guide for undervolting an R9 390 somewhere? Something that tells me what the best settings are?

There's a thread about it https://bitcointalksearch.org/topic/one-way-to-undervolt-r9-300-series-cards-by-bios-mod-1465128

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but the question is, if i undervolt my 390s will that impact the hashrate? Currently I should be able to get roughly 32 MH/s per 390. If I undevolt , will it still hash at the same rate or will it be less?

Yes, hashrate will be the same. Only problem is if you go too low on the voltage, it will just keep crashing.

Nice. Thanks. Is there a detailed guide for undervolting an R9 390 somewhere? Something that tells me what the best settings are?

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Quote from: Amph on May 22, 2016, 02:44:16 PM

but the question is, if i undervolt my 390s will that impact the hashrate? Currently I should be able to get roughly 32 MH/s per 390. If I undevolt , will it still hash at the same rate or will it be less?

Yes, hashrate will be the same. Only problem is if you go too low on the voltage, it will just keep crashing.

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but the question is, if i undervolt my 390s will that impact the hashrate? Currently I should be able to get roughly 32 MH/s per 390. If I undevolt , will it still hash at the same rate or will it be less?

QuintLeo

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Precision-X (EVGA utility) can do TDP setting under Windows.

I believe it's handled by nvidia-settings or nvidia-smi under Linux.

I suspect there are other options under Windows, but I tried MSI's Afterburner and strongly DISliked it (dark text on dark background VERY HARD TO READ issue as I recall).

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Quote from: CryptoSalad on May 21, 2016, 06:32:54 PM

How do you go about under volt cards? Can you do this though MSI afterburner, or do you need to use some custom Bios update for cards?

Just tick 'unlock voltage control' in AB compatibility properties, after that you can move core voltage slider in the opening screen.

not with nvidia

True, with nvidia you can't undervolt. Only way to save power is to lower TDP which actually works quite well on ethereum mining. My 5x970 can do 83MH@600w from the wall.

i'm reading now about an issue coming from the OS for six nvidia 970 or 980, is this true with amd also

and was it solved or still ongoing? what is the problem exactly?

With AMD cards, you can have up to 8 GPU in a system. You can change the voltage with MSI on those 8 GPU without problem.

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Quote from: Stein on May 22, 2016, 03:48:12 PM

True, with nvidia you can't undervolt. Only way to save power is to lower TDP which actually works quite well on ethereum mining. My 5x970 can do 83MH@600w from the wall.

Excuse the ignorance. I have some 970's
What is TDP and how do I lower it ?

TDP stands for thermal design power (correct me if wrong). If you are on windows install MSI afterburner, there you have power limit slider.

I have never tried to save power with nvidia on linux so I don't know about that.

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True, with nvidia you can't undervolt. Only way to save power is to lower TDP which actually works quite well on ethereum mining. My 5x970 can do 83MH@600w from the wall.

Excuse the ignorance. I have some 970's
What is TDP and how do I lower it ?

Amph

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Quote from: CryptoSalad on May 21, 2016, 06:32:54 PM

How do you go about under volt cards? Can you do this though MSI afterburner, or do you need to use some custom Bios update for cards?

Just tick 'unlock voltage control' in AB compatibility properties, after that you can move core voltage slider in the opening screen.

not with nvidia

True, with nvidia you can't undervolt. Only way to save power is to lower TDP which actually works quite well on ethereum mining. My 5x970 can do 83MH@600w from the wall.

i'm reading now about an issue coming from the OS for six nvidia 970 or 980, is this true with amd also

and was it solved or still ongoing? what is the problem exactly?

antantti

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Quote from: Lasvista on May 22, 2016, 10:35:41 AM

Quote from: CryptoSalad on May 21, 2016, 06:32:54 PM

How do you go about under volt cards? Can you do this though MSI afterburner, or do you need to use some custom Bios update for cards?

Just tick 'unlock voltage control' in AB compatibility properties, after that you can move core voltage slider in the opening screen.

not with nvidia

True, with nvidia you can't undervolt. Only way to save power is to lower TDP which actually works quite well on ethereum mining. My 5x970 can do 83MH@600w from the wall.

But that is not as efficient as the AMD cards. I can lower the voltage, and set the frequency work under that voltage.

Yes I know, I have them all. Hash/ watt 290=970, 390 beats them both.

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Quote from: Tmdz on May 22, 2016, 10:50:17 AM

I have some R9 290 refurb cards on the way, I have not worked with the 290 yet so how far can you under volt them for how many watts?

The 290 is not as good as the 390. For XFX 390, you can undervolt -200mV with trixx and run at 977 MHz and consume about 160W.

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I have some R9 290 refurb cards on the way, I have not worked with the 290 yet so how far can you under volt them for how many watts?

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Quote from: CryptoSalad on May 21, 2016, 06:32:54 PM

How do you go about under volt cards? Can you do this though MSI afterburner, or do you need to use some custom Bios update for cards?

Just tick 'unlock voltage control' in AB compatibility properties, after that you can move core voltage slider in the opening screen.

not with nvidia

True, with nvidia you can't undervolt. Only way to save power is to lower TDP which actually works quite well on ethereum mining. My 5x970 can do 83MH@600w from the wall.

But that is not as efficient as the AMD cards. I can lower the voltage, and set the frequency work under that voltage.

antantti

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Quote from: CryptoSalad on May 21, 2016, 06:32:54 PM

How do you go about under volt cards? Can you do this though MSI afterburner, or do you need to use some custom Bios update for cards?

Just tick 'unlock voltage control' in AB compatibility properties, after that you can move core voltage slider in the opening screen.

not with nvidia

True, with nvidia you can't undervolt. Only way to save power is to lower TDP which actually works quite well on ethereum mining. My 5x970 can do 83MH@600w from the wall.

Amph

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