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Topic: Ethereum mining still profitable? - page 52. (Read 131243 times)

legendary
Activity: 1176
Merit: 1015
March 12, 2016, 02:59:48 PM
done a try to OC a bit now. from 1080 core til 1150 core volt +25 and power limit +50
did go from 28.4 to 30.3Mhs
temps are around 70-72c with fans on auto around 45%

that didnt go so well for me Smiley computer hung after 20min
will give a bit lower oc and see if that works

Try 1100, -100mV to core & aux + tap user defined fan profile. Leave power limit as it is.


-100mV to core & aux set.
but i see some black lines on the screen when i have 1100 like the graphics tear. get lower temps 64c now at 1080
didnt see much diffrence when i had it at 1100
-100 gave me black screen after a few mins.

What brand is that card? And what PSU?



Sapphire R9 390X Nitro 8GB
Corsair TX750

Ok I thought it was 390. Reset everything.

Do you have GPUZ installed? If so does it show memory controller load under sensors tab? What is it? What drivers are you using? And what OS?
full member
Activity: 196
Merit: 100
March 12, 2016, 02:45:47 PM
done a try to OC a bit now. from 1080 core til 1150 core volt +25 and power limit +50
did go from 28.4 to 30.3Mhs
temps are around 70-72c with fans on auto around 45%

that didnt go so well for me Smiley computer hung after 20min
will give a bit lower oc and see if that works

Try 1100, -100mV to core & aux + tap user defined fan profile. Leave power limit as it is.


-100mV to core & aux set.
but i see some black lines on the screen when i have 1100 like the graphics tear. get lower temps 64c now at 1080
didnt see much diffrence when i had it at 1100
-100 gave me black screen after a few mins.

What brand is that card? And what PSU?



Sapphire R9 390X Nitro 8GB
Corsair TX750
full member
Activity: 239
Merit: 250
March 12, 2016, 02:24:49 PM
done a try to OC a bit now. from 1080 core til 1150 core volt +25 and power limit +50
did go from 28.4 to 30.3Mhs
temps are around 70-72c with fans on auto around 45%

that didnt go so well for me Smiley computer hung after 20min
will give a bit lower oc and see if that works

Try 1100, -100mV to core & aux + tap user defined fan profile. Leave power limit as it is.


-100mV to core & aux set.
but i see some black lines on the screen when i have 1100 like the graphics tear. get lower temps 64c now at 1080
didnt see much diffrence when i had it at 1100
-100 gave me black screen after a few mins.

It depends on your particular cards. Some of my cards works well on 1160 MHz at -100mV, -100mV. Some works at 1100.
legendary
Activity: 1176
Merit: 1015
March 12, 2016, 02:24:04 PM
done a try to OC a bit now. from 1080 core til 1150 core volt +25 and power limit +50
did go from 28.4 to 30.3Mhs
temps are around 70-72c with fans on auto around 45%

that didnt go so well for me Smiley computer hung after 20min
will give a bit lower oc and see if that works

Try 1100, -100mV to core & aux + tap user defined fan profile. Leave power limit as it is.


-100mV to core & aux set.
but i see some black lines on the screen when i have 1100 like the graphics tear. get lower temps 64c now at 1080
didnt see much diffrence when i had it at 1100
-100 gave me black screen after a few mins.

What brand is that card? And what PSU?

full member
Activity: 196
Merit: 100
March 12, 2016, 02:22:26 PM
done a try to OC a bit now. from 1080 core til 1150 core volt +25 and power limit +50
did go from 28.4 to 30.3Mhs
temps are around 70-72c with fans on auto around 45%

that didnt go so well for me Smiley computer hung after 20min
will give a bit lower oc and see if that works

Try 1100, -100mV to core & aux + tap user defined fan profile. Leave power limit as it is.


-100mV to core & aux set.
but i see some black lines on the screen when i have 1100 like the graphics tear. get lower temps 64c now at 1080
didnt see much diffrence when i had it at 1100
-100 gave me black screen after a few mins.
full member
Activity: 196
Merit: 100
March 12, 2016, 02:09:14 PM
done a try to OC a bit now. from 1080 core til 1150 core volt +25 and power limit +50
did go from 28.4 to 30.3Mhs
temps are around 70-72c with fans on auto around 45%

that didnt go so well for me Smiley computer hung after 20min
will give a bit lower oc and see if that works

Try 1100, -100mV to core & aux + tap user defined fan profile. Leave power limit as it is.


-100mV to core & aux set.
but i see some black lines on the screen when i have 1100 like the graphics tear. get lower temps 64c now at 1080
didnt see much diffrence when i had it at 1100
legendary
Activity: 1176
Merit: 1015
March 12, 2016, 01:55:36 PM
done a try to OC a bit now. from 1080 core til 1150 core volt +25 and power limit +50
did go from 28.4 to 30.3Mhs
temps are around 70-72c with fans on auto around 45%

that didnt go so well for me Smiley computer hung after 20min
will give a bit lower oc and see if that works

Try 1100, -100mV to core & aux + tap user defined fan profile. Leave power limit as it is.

legendary
Activity: 1176
Merit: 1015
March 12, 2016, 01:52:38 PM
That's what I thought too after playing with nvidias. In fact I was running these amd's long time at 1600-1700 mem thinking it automatically gives me more hash.

Nvidia with 256-bit memory lane and 3,5-4GB is memory limited, amd with 384-bit and 3GB suffers from DAG-file size, amd with 512-bit and 8GB is begging for core overclock.

maxwell cores are typically overclocked/boosted from the factory so there may not be as much room left anyway compared to AMD's, but power to get there is still the differentiator.

I don't see 390's with less than 8GB, or less than $300+ each... but at $12+/ETH, ROI is so short for anything these days. Shocked

Cheap 290 with 512-bit bus and 4GB does closer to 30MH. It just doesn't show me that memory controller load...

full member
Activity: 196
Merit: 100
March 12, 2016, 01:52:24 PM
done a try to OC a bit now. from 1080 core til 1150 core volt +25 and power limit +50
did go from 28.4 to 30.3Mhs
temps are around 70-72c with fans on auto around 45%

that didnt go so well for me Smiley computer hung after 20min
will give a bit lower oc and see if that works
full member
Activity: 150
Merit: 100
caeruleum arca archa
March 12, 2016, 01:22:11 PM
That's what I thought too after playing with nvidias. In fact I was running these amd's long time at 1600-1700 mem thinking it automatically gives me more hash.

Nvidia with 256-bit memory lane and 3,5-4GB is memory limited, amd with 384-bit and 3GB suffers from DAG-file size, amd with 512-bit and 8GB is begging for core overclock.

maxwell cores are typically overclocked/boosted from the factory so there may not be as much room left anyway compared to AMD's, but power to get there is still the differentiator.

I don't see 390's with less than 8GB, or less than $300+ each... but at $12+/ETH, ROI is so short for anything these days. Shocked
legendary
Activity: 1176
Merit: 1015
March 12, 2016, 01:00:26 PM
Can you speculate why the 390x is not faster than the 390 at the same frequency. It has more core, 2816 vs. 2560.

I have no idea. 10% difference should be easy to see, anyone with both 390 and 390x?

Memory speed may have as much or more to do with it, as well as bandwidth, since the DAG is hashed purely in gpu memory. Don't know about AMD, but GTX responds much better to maxing memclock vs any bump in core clock.

That's what I thought too after playing with nvidias. In fact I was running these amd's long time at 1600-1700 mem thinking it automatically gives me more hash.

Nvidia with 256-bit memory lane and 3,5-4GB is memory limited, amd with 384-bit and 3GB suffers from DAG-file size, amd with 512-bit and 8GB is begging for core overclock.




full member
Activity: 206
Merit: 100
March 12, 2016, 12:53:25 PM
The bandwidth of the 390 cards is 512 bit. So maybe the memory speed is already fast enough. It is restricted by the core.
full member
Activity: 150
Merit: 100
caeruleum arca archa
March 12, 2016, 12:38:18 PM
Can you speculate why the 390x is not faster than the 390 at the same frequency. It has more core, 2816 vs. 2560.

I have no idea. 10% difference should be easy to see, anyone with both 390 and 390x?

Memory speed may have as much or more to do with it, as well as bandwidth, since the DAG is hashed purely in gpu memory. Don't know about AMD, but GTX responds much better to maxing memclock vs any bump in core clock.
full member
Activity: 196
Merit: 100
March 12, 2016, 11:56:55 AM
done a try to OC a bit now. from 1080 core til 1150 core volt +25 and power limit +50
did go from 28.4 to 30.3Mhs
temps are around 70-72c with fans on auto around 45%
legendary
Activity: 1176
Merit: 1015
March 12, 2016, 11:41:59 AM
Can you speculate why the 390x is not faster than the 390 at the same frequency. It has more core, 2816 vs. 2560.

I have no idea. 10% difference should be easy to see, anyone with both 390 and 390x?


sr. member
Activity: 252
Merit: 250
March 12, 2016, 10:28:15 AM
Can you speculate why the 390x is not faster than the 390 at the same frequency. It has more core, 2816 vs. 2560.
legendary
Activity: 1176
Merit: 1015
March 12, 2016, 09:28:15 AM

What was the aux voltage before the cleaning? Do you believe it is due to the memory frequency going down from 1500 to 1200? Did you see the difference in power in/out?

aux -100mV adds another 15W of powersaving, from 540 to 525W. Memory downclock savings are minimal, hard to see at the wall.

No difference in power in/out. 1125/1200 is the ratio where memory controller load is 96-97%.



I thought the IC power consumption is linearly proportional to the circuit frequency. Why the drop from 1500 to 1200 MHz has not effect?

I thought so too but it looks like we were wrong. It does have an effect as long as core can utilize memory controller 100%. Lower mem - lower hash and power consumption, higher mem - nothing happens, mc just sits and waits for work.

I went so far that I tested 720/750, again same ratio, mc load close to 100%.

I didn't have time to verify this but it looks like 390 could be the first no Nano 20MH/100W card. 310W from the wall and ethminer hashrate somewhere at 40MH area.



From your observation, the hash rate is limited by the Core frequency. The more core, the better. So the 390x should have higher hash rate, but it is at best same as 390. Quite strange.

It is. Based on my tests to get mc 100% loaded at 1500MHz you would need 1400 core which is obviously impossible.
member
Activity: 102
Merit: 10
March 12, 2016, 09:16:16 AM

What was the aux voltage before the cleaning? Do you believe it is due to the memory frequency going down from 1500 to 1200? Did you see the difference in power in/out?

aux -100mV adds another 15W of powersaving, from 540 to 525W. Memory downclock savings are minimal, hard to see at the wall.

No difference in power in/out. 1125/1200 is the ratio where memory controller load is 96-97%.



I thought the IC power consumption is linearly proportional to the circuit frequency. Why the drop from 1500 to 1200 MHz has not effect?

I thought so too but it looks like we were wrong. It does have an effect as long as core can utilize memory controller 100%. Lower mem - lower hash and power consumption, higher mem - nothing happens, mc just sits and waits for work.

I went so far that I tested 720/750, again same ratio, mc load close to 100%.

I didn't have time to verify this but it looks like 390 could be the first no Nano 20MH/100W card. 310W from the wall and ethminer hashrate somewhere at 40MH area.



From your observation, the hash rate is limited by the Core frequency. The more core, the better. So the 390x should have higher hash rate, but it is at best same as 390. Quite strange.
full member
Activity: 168
Merit: 100
March 12, 2016, 09:05:13 AM
did the difficulty go up in the last few days?

mining @ http://dwarfpool.com/ and uses there proxy software.
i did go from 0.9 ETH/day to 0.7 ETH/day

anyone with a 390x ? i get about 28MH on my card stock clock
any tips on settings for a 390x i use
ethminer --opencl-platform 1 --opencl-device 0 -G -F http://URL/gpu1

You can find the difficulty there. http://etherscan.io/charts/difficulty
It rose a lot recently since the price of Ethereum rose.
full member
Activity: 196
Merit: 100
March 12, 2016, 06:50:54 AM
did the difficulty go up in the last few days?

mining @ http://dwarfpool.com/ and uses there proxy software.
i did go from 0.9 ETH/day to 0.7 ETH/day

anyone with a 390x ? i get about 28MH on my card stock clock
any tips on settings for a 390x i use
ethminer --opencl-platform 1 --opencl-device 0 -G -F http://URL/gpu1
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