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Author Topic: Building a small CPU farm, need inputs regarding choice of cpu.  (Read 1560 times)
Cryptozillah
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August 02, 2015, 08:22:54 AM
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I am about to build 4-6 CPU rigs with stuff i have laying around since my GPU mining days.

I have alot of Asrock H81-Pro boards sitting in alu frames.
So. I am about to buy some Intel socket 1150 cpu:s now.

What cpu is the best bang for the buck here ? I5 or I7 ?

I would need some inputs here.
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bathrobehero
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August 02, 2015, 01:21:20 PM
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GPU mining days.

Why would you go back to CPU mining?
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August 02, 2015, 01:32:53 PM
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You can find some stats about CPU hashrate here: https://litecoin.info/Mining_hardware_comparison#AMD

I'm also wondering why you would use a CPU mining rig nowadays or even still want to buy one.

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August 02, 2015, 02:39:00 PM
 #4

That's a stupid idea, CPUs take more power than profit gained...

Hi there, I'm from South Africa.
This means I'm poor, I guess.
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August 02, 2015, 04:22:42 PM
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OP,
The unlocked i5s would be the best bank for your buck here.  A 4690K is ~$230ish, and should produce near to what the i7s with their HT enabled hash rates would.

Edit:  Relevant article on Haswell undervolting.
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August 02, 2015, 04:23:32 PM
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You can find some stats about CPU hashrate here: https://litecoin.info/Mining_hardware_comparison#AMD

I'm also wondering why you would use a CPU mining rig nowadays or even still want to buy one.

Some people do not pay for electricity...or their kw/h charge is so low that some form of hashing is possible.  Wink
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August 02, 2015, 04:25:04 PM
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You can find some stats about CPU hashrate here: https://litecoin.info/Mining_hardware_comparison#AMD

I'm also wondering why you would use a CPU mining rig nowadays or even still want to buy one.

Some people do not pay for electricity...or their kw/h charge is so low that some form of hashing is possible.  Wink

GPUs are superior in that case too.
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August 02, 2015, 04:28:51 PM
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You can find some stats about CPU hashrate here: https://litecoin.info/Mining_hardware_comparison#AMD

I'm also wondering why you would use a CPU mining rig nowadays or even still want to buy one.

Some people do not pay for electricity...or their kw/h charge is so low that some form of hashing is possible.  Wink

GPUs are superior in that case too.

Indeed, you're better off then with Nvidea GPU's (instead of AMD GPU's). However, buying CPU's in order to spare some bucks on electricity is crazy.. Buying components to build CPU or GPU miners is also crazy these days.

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August 02, 2015, 04:39:29 PM
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You can find some stats about CPU hashrate here: https://litecoin.info/Mining_hardware_comparison#AMD

I'm also wondering why you would use a CPU mining rig nowadays or even still want to buy one.

Some people do not pay for electricity...or their kw/h charge is so low that some form of hashing is possible.  Wink

GPUs are superior in that case too.

Not when the algo he/she is attempting to mine is CPU-only.  

Your original comment (and Don007's) are out of scope of the OPs question and frankly derailing the original intent of the thread.  The OP asked for input about the bang for buck on Haswel-based CPUs.  The OP did not ask for anything else.  If he/she is making a decision to put up some CPU rigs, then he is likely past the profitability considerations.
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August 02, 2015, 06:56:12 PM
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What are a couple of good CPU only (GPU resistant) coins to mine?

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August 02, 2015, 08:42:47 PM
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Not when the algo he/she is attempting to mine is CPU-only. 

What are a couple of good CPU only (GPU resistant) coins to mine?

Are there any PoW schemes where people have had time to develop GPU code,
but yet no GPU implementation can match the best CPU code in speed?

Primecoin was a contender for many years, but is no longer GPU resistant.

Cryptonight was considered GPU resistant until GPU miners took over last year.

Has M7M (Magi) fallen prey yet?

My own Cuckoo Cycle might resist GPUs and still has a $500 bounty on it for GPUs
achieving speed parity, but without adoption, that seems insufficient motivation
for the GPU coders...

https://github.com/tromp/cuckoo
kingcolex
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August 02, 2015, 10:22:56 PM
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Not when the algo he/she is attempting to mine is CPU-only. 

What are a couple of good CPU only (GPU resistant) coins to mine?

Are there any PoW schemes where people have had time to develop GPU code,
but yet no GPU implementation can match the best CPU code in speed?

Primecoin was a contender for many years, but is no longer GPU resistant.

Cryptonight was considered GPU resistant until GPU miners took over last year.

Has M7M (Magi) fallen prey yet?

My own Cuckoo Cycle might resist GPUs and still has a $500 bounty on it for GPUs
achieving speed parity, but without adoption, that seems insufficient motivation
for the GPU coders...

https://github.com/tromp/cuckoo
That's the coin that has a cap on hashrate (magi)? If so need to find the cheapest CPU that meets that demand. My question is why probtc boards? Sure they're cheap but long wouldn't you want the smallest mobos around?

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August 02, 2015, 11:29:05 PM
 #13

Your original comment (and Don007's) are out of scope of the OPs question

Not really, as I sent him an URL to where he can find hashrate of some Intel CPU's --> https://litecoin.info/Mining_hardware_comparison#Intel.

The OP asked for input about the bang for buck on Haswel-based CPUs. 

To determine what is the best 'bang for the buck', needs some calculations (with regard to the price). I think the TS can do that on it own, together with the information located at the URL I sent him.

The OP did not ask for anything else.  If he/she is making a decision to put up some CPU rigs, then he is likely past the profitability considerations.

Or I must be interpretating him wrong, or he actually is:

I am about to build 4-6 CPU rigs *snip*

<< Curently quite inactive as I'm really busy in my private life. I will get back soon! >>
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Cryptozillah
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August 03, 2015, 04:51:12 AM
 #14

Hello everyone.

I am going for cpu coins only. I think they will come back more and more. Just look at Axiom.
I have been looking at https://litecoin.info/Mining_hardware_comparison#Intel. already but i was hoping someone here had some fresher numbers.

OP,
The unlocked i5s would be the best bank for your buck here.  A 4690K is ~$230ish, and should produce near to what the i7s with their HT enabled hash rates would.

Edit:  Relevant article on Haswell undervolting.

I have been checking that site already but it is not that many newer cpus listed.
4690k was one of the cpus i have checked out myself.

I will check the undervoltage link, thanks.

Not when the algo he/she is attempting to mine is CPU-only.  

What are a couple of good CPU only (GPU resistant) coins to mine?

Are there any PoW schemes where people have had time to develop GPU code,
but yet no GPU implementation can match the best CPU code in speed?

Primecoin was a contender for many years, but is no longer GPU resistant.

Cryptonight was considered GPU resistant until GPU miners took over last year.

Has M7M (Magi) fallen prey yet?

My own Cuckoo Cycle might resist GPUs and still has a $500 bounty on it for GPUs
achieving speed parity, but without adoption, that seems insufficient motivation
for the GPU coders...

https://github.com/tromp/cuckoo
That's the coin that has a cap on hashrate (magi)? If so need to find the cheapest CPU that meets that demand. My question is why probtc boards? Sure they're cheap but long wouldn't you want the smallest mobos around?
I have like at least fifteen asrock boards laying around so that is what i want to use for this Smiley
MaxDZ8
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August 03, 2015, 10:46:15 AM
 #15

Has M7M (Magi) fallen prey yet?
There's absolutely no chance this will ever happen.

Yescrypt (being not compute-based) will be GPU-resistant for the foreseeable future (the GPU miner isn't very competitive AFAIK).
Cryptozillah
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August 03, 2015, 12:13:31 PM
 #16

I found some numbers on the 5820K mining Magi.
http://cryptomining-blog.com/4491-cpu-mining-the-coin-magi-xmg-what-can-you-expect/

5820K seem pretty neat. The question is: Buy 2-3 more expensive cpus or go on several cheaper models and try to overclock them a bit.
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August 03, 2015, 01:21:05 PM
 #17

Hello everyone.

I am going for cpu coins only. I think they will come back more and more. Just look at Axiom.
I have been looking at https://litecoin.info/Mining_hardware_comparison#Intel. already but i was hoping someone here had some fresher numbers.

OP,
The unlocked i5s would be the best bank for your buck here.  A 4690K is ~$230ish, and should produce near to what the i7s with their HT enabled hash rates would.

Edit:  Relevant article on Haswell undervolting.

I have been checking that site already but it is not that many newer cpus listed.
4690k was one of the cpus i have checked out myself.

I will check the undervoltage link, thanks.

Not when the algo he/she is attempting to mine is CPU-only.  

What are a couple of good CPU only (GPU resistant) coins to mine?

Are there any PoW schemes where people have had time to develop GPU code,
but yet no GPU implementation can match the best CPU code in speed?

Primecoin was a contender for many years, but is no longer GPU resistant.

Cryptonight was considered GPU resistant until GPU miners took over last year.

Has M7M (Magi) fallen prey yet?

My own Cuckoo Cycle might resist GPUs and still has a $500 bounty on it for GPUs
achieving speed parity, but without adoption, that seems insufficient motivation
for the GPU coders...

https://github.com/tromp/cuckoo
That's the coin that has a cap on hashrate (magi)? If so need to find the cheapest CPU that meets that demand. My question is why probtc boards? Sure they're cheap but long wouldn't you want the smallest mobos around?
I have like at least fifteen asrock boards laying around so that is what i want to use for this Smiley
How are you doing the powersupplies for this? Risking it with a lot of cheap low power ones or do you happen to have a ton of powersupplies as well?

Cryptozillah
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August 03, 2015, 01:27:16 PM
 #18

Hello everyone.

I am going for cpu coins only. I think they will come back more and more. Just look at Axiom.
I have been looking at https://litecoin.info/Mining_hardware_comparison#Intel. already but i was hoping someone here had some fresher numbers.

OP,
The unlocked i5s would be the best bank for your buck here.  A 4690K is ~$230ish, and should produce near to what the i7s with their HT enabled hash rates would.

Edit:  Relevant article on Haswell undervolting.

I have been checking that site already but it is not that many newer cpus listed.
4690k was one of the cpus i have checked out myself.

I will check the undervoltage link, thanks.

Not when the algo he/she is attempting to mine is CPU-only.  

What are a couple of good CPU only (GPU resistant) coins to mine?

Are there any PoW schemes where people have had time to develop GPU code,
but yet no GPU implementation can match the best CPU code in speed?

Primecoin was a contender for many years, but is no longer GPU resistant.

Cryptonight was considered GPU resistant until GPU miners took over last year.

Has M7M (Magi) fallen prey yet?

My own Cuckoo Cycle might resist GPUs and still has a $500 bounty on it for GPUs
achieving speed parity, but without adoption, that seems insufficient motivation
for the GPU coders...

https://github.com/tromp/cuckoo
That's the coin that has a cap on hashrate (magi)? If so need to find the cheapest CPU that meets that demand. My question is why probtc boards? Sure they're cheap but long wouldn't you want the smallest mobos around?
I have like at least fifteen asrock boards laying around so that is what i want to use for this Smiley
How are you doing the powersupplies for this? Risking it with a lot of cheap low power ones or do you happen to have a ton of powersupplies as well?
I still have alot of PSU:s laying around since my GPU mining days. I just sold the GPU:s but kept the rest. All i need for this new rigs is cpu:s, right now there are Celerons mounted on the boards.
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August 03, 2015, 01:42:03 PM
 #19

That link shows an intel Core i7 consistently performing much worse than a GTX580.

Quote
Yescrypt (being not compute-based) will be GPU-resistant for the foreseeable future (the GPU miner isn't very competitive AFAIK).

Not very competitive can mean a lot of things. Is it slower than an intel Core i7 or not?
Also, how much effort has gone into developing yescript GPU miners?
 
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August 03, 2015, 02:18:40 PM
 #20

That link shows an intel Core i7 consistently performing much worse than a GTX580.

Quote
Yescrypt (being not compute-based) will be GPU-resistant for the foreseeable future (the GPU miner isn't very competitive AFAIK).

Not very competitive can mean a lot of things. Is it slower than an intel Core i7 or not?
Also, how much effort has gone into developing yescript GPU miners?
 
some effort, was asked to code it... (may-be there are some possibility to improve, haven't had time to check back...)
might have a look at your cuckoo... if the bounty is still there...

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