Consolidated Litecoin Mining Guide for 5xxx, 6xxx, and 7xxx GPUs

[dadach]

hi i just got 7790 today, does anyone have some experience how to get them working optimally?

thanks

[1715419649]

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[1715419649]

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[1715419649]

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[pizza]

Looking for help to improve kH/s/W.

Here's my setup:
MSI Z68MA-ED55 (B3) motherboard
Intel G530 processor
4GB DDR3 1066 RAM
7950 Sapphire 100352-2L (purchased March 2013, voltage unlocked!)
16X-16X riser cable
Corsair TX750W power supply
AMD 13.1 drivers
AMD SDK 2.8
cgminer 2.11.3 (-I 20, --tc 22400 -w 256 -g 1 -l 1)
Sapphire Trixx

Best settings: 925/1250/.962V 560kH/s 3.29 kH/s/W.

Given high electricity cost my goal is to maximize kH/s/W.

My current best setup is 925/1250 at 0.962V for 560 kH/s at 170W or 3.29 kH/s/W, after many hours of systematically mapping gpu clock (850-1250), memclock (1250-1750), and gpu v (0.900-1.250). I've had the rig up to 740 kH/s stable (1225/1750/1.250V) but at 345W or 2.14 kH/s/W the efficiency just isn't there (would be great for a free power situation!).

Looking for advice from the experts on what to do next to improve my efficiency.

Thanks,

Tejsei

Wow, that's an absolutely fantastic efficiency!  I saw a tiny improvement (~ 5 Kh/s) changing the thread concurrency from 22400 to 16384.  See if that helps you at all.

I just ran those settings excellent!! Anybody know what to tweak to get it up to maybe 620kh without upping the voltage to an extremely high level? I messed around with everything I can't seem to go any higher.

[bangarang]

I'm using GUIminer scrypt to mine with CGminer and I just got a 7950. On 5000 series cards GPU usage was always steady while mining but my 7950 jumps up and down all the time. Any idea what could be causing this? The big drop is me stopping mining for a few seconds. It jumps from around 64% up to 99% and back.

https://i.imgur.com/x6aNHJQ.jpg

I am also getting this one one of my 7950s.. Used to get it on two.. dont know what I did to reduce it by 1 now..  

i can resolve this problem just by set the power limit around 10-20%

worked for me.

Nice, glad could help u..

[Tejsei3]

Looking for help to improve kH/s/W.

Here's my setup:
MSI Z68MA-ED55 (B3) motherboard
Intel G530 processor
4GB DDR3 1066 RAM
7950 Sapphire 100352-2L (purchased March 2013, voltage unlocked!)
16X-16X riser cable
Corsair TX750W power supply
AMD 13.1 drivers
AMD SDK 2.8
cgminer 2.11.3 (-I 20, --tc 22400 -w 256 -g 1 -l 1)
Sapphire Trixx

Best settings: 925/1250/.962V 560kH/s 3.29 kH/s/W.

Given high electricity cost my goal is to maximize kH/s/W.

My current best setup is 925/1250 at 0.962V for 560 kH/s at 170W or 3.29 kH/s/W, after many hours of systematically mapping gpu clock (850-1250), memclock (1250-1750), and gpu v (0.900-1.250). I've had the rig up to 740 kH/s stable (1225/1750/1.250V) but at 345W or 2.14 kH/s/W the efficiency just isn't there (would be great for a free power situation!).

Looking for advice from the experts on what to do next to improve my efficiency.

Thanks,

Tejsei

Wow, that's an absolutely fantastic efficiency!  I saw a tiny improvement (~ 5 Kh/s) changing the thread concurrency from 22400 to 16384.  See if that helps you at all.

I just ran those settings excellent!! Anybody know what to tweak to get it up to maybe 620kh without upping the voltage to an extremely high level? I messed around with everything I can't seem to go any higher.

Try 1050/1650/1.075 I'm seeing 640 kH/s at 235 W per card or 2.72 kH/J.

Even though this is less energy efficient, it is still more profitable given the ratio of electricity expense to litecoin value.

In case it helps anyone else, here is how I have it figured out in a spreadsheet:

=(hashrate*mining100USD/100)-(powerInW*electricityExpenseInUSD/kWh*24/1000)

mining100USD is the USD earned by mining 24h with 100 kH/s. To get this number, look up dustcoin.com/mining and enter "100" in the scrypt hashrate field, then in the Revenue field it will tell you how many coins/day earned. This is mining100LTC. Convert this to mining100USD by multiplying by the LTCUSD conversion rate, such as $2.5/LTC.

So here's an example:

Profitability = (640 kH/s * 1.108 USD/100kH/s/d / 100) - (235W * 0.10 $/kWh * 24h / 1000W/kW) = $7.09 - $0.56 = $6.52

Using this you can compare different hashrate/power setups and see which is more profitable, taking into account your electricity expense.

Hope this helps.

[GiLa]

Just posting up some of my tests for Litecoin mining

7970 w 256 i 13 tc 8192  

1000/1660=701
950/1580=665
920/1375=645
900/1350=632
840/1250=590
800/950=563

As you can see my sweet spot with my 7970 is around 0.6 and I can increase my clock speed and memory speed based upon that and can break the 700k/h mark.

However with my 7870, its a totally different ball game

7870 w 256 i 12 tc 8192

1200/1500=410
1200/1400=400
1200/1300=352
1200/1250=405
1200/1200=400
1200/1150=365
1200/1100=358
1200/1050=330

1100/1300=366
1100/1200=375
1100/1100=365
1100/1000=373
1100/900=343

scrap that after restarting cgminer, I am getting different results for each clock.

[Beaflag VonRathburg]

Just posting up some of my tests for Litecoin mining

7970 w 256 i 13 tc 8192  

1000/1660=701
950/1580=665
920/1375=645
900/1350=632
840/1250=590
800/950=563

As you can see my sweet spot with my 7970 is around 0.6 and I can increase my clock speed and memory speed based upon that and can break the 700k/h mark.

What OS, catalyst, miner version, and could you post your config file?

[Beaflag VonRathburg]

try this  -g 2 -I 13 --shaders 2048 -w256 

use cgminer 2.11.4 do not set thread-concurrency let cgminer detect the best value for your cards, maybe try the last beta drivers 13.3, i get more than 720 kh/s with core1040/memory1750 with vcore unervolted and vmemory overvolted , i did order Arctic extreme cooler tried it on 1 card and it is amazing I am getting around 67 c°with these setting comparing to the other cards that are running @ 86 c° I did order more coolers for the other cards, it is worth every cent I did give.

This worked very well for me. I went from:

I 20
TC 24000
g 1

to

I 13
TC 10240
g 2

With the core clock staying at 1025, memory at 1800, and voltage at 1.063 each GPU went from 675 KH to 720 KH.

[mmitech]

try this  -g 2 -I 13 --shaders 2048 -w256 

use cgminer 2.11.4 do not set thread-concurrency let cgminer detect the best value for your cards, maybe try the last beta drivers 13.3, i get more than 720 kh/s with core1040/memory1750 with vcore unervolted and vmemory overvolted , i did order Arctic extreme cooler tried it on 1 card and it is amazing I am getting around 67 c°with these setting comparing to the other cards that are running @ 86 c° I did order more coolers for the other cards, it is worth every cent I did give.

This worked very well for me. I went from:

I 20
TC 24000
g 1

to

I 13
TC 10240
g 2

With the core clock staying at 1025, memory at 1800, and voltage at 1.063 each GPU went from 675 KH to 720 KH.

 I am glad that did help you .

[Beaflag VonRathburg]

try this  -g 2 -I 13 --shaders 2048 -w256 

use cgminer 2.11.4 do not set thread-concurrency let cgminer detect the best value for your cards, maybe try the last beta drivers 13.3, i get more than 720 kh/s with core1040/memory1750 with vcore unervolted and vmemory overvolted , i did order Arctic extreme cooler tried it on 1 card and it is amazing I am getting around 67 c°with these setting comparing to the other cards that are running @ 86 c° I did order more coolers for the other cards, it is worth every cent I did give.

This worked very well for me. I went from:

I 20
TC 24000
g 1

to

I 13
TC 10240
g 2

With the core clock staying at 1025, memory at 1800, and voltage at 1.063 each GPU went from 675 KH to 720 KH.

 I am glad that did help you .

What's weird now is that I went to try and implement the same settings on my rigs downstairs and they only get 650 with almost the exact same settings. The only difference is my upstairs computer has:

"gpu-platform" : "1",

While the downstairs ones have:

"gpu-platform" : "0",

If I try to set the downstairs ones to 1 they won't start cgminer. Guess it is time for more testing.

[TheSwede75]

So, my Pool allows me to set 'difficulty' from 32, 64 and 128. What should I choose GPU mining with 78xx/79xx? What/how does it matter?

[Beaflag VonRathburg]

try this  -g 2 -I 13 --shaders 2048 -w256 

use cgminer 2.11.4 do not set thread-concurrency let cgminer detect the best value for your cards, maybe try the last beta drivers 13.3, i get more than 720 kh/s with core1040/memory1750 with vcore unervolted and vmemory overvolted , i did order Arctic extreme cooler tried it on 1 card and it is amazing I am getting around 67 c°with these setting comparing to the other cards that are running @ 86 c° I did order more coolers for the other cards, it is worth every cent I did give.

This worked very well for me. I went from:

I 20
TC 24000
g 1

to

I 13
TC 10240
g 2

With the core clock staying at 1025, memory at 1800, and voltage at 1.063 each GPU went from 675 KH to 720 KH.

 I am glad that did help you .

What's weird now is that I went to try and implement the same settings on my rigs downstairs and they only get 650 with almost the exact same settings. The only difference is my upstairs computer has:

"gpu-platform" : "1",

While the downstairs ones have:

"gpu-platform" : "0",

If I try to set the downstairs ones to 1 they won't start cgminer. Guess it is time for more testing.

As soon as I closed MSI Afterburner the hashrate shot right up to 720 like the upstairs cards. Picked up a nice 289 KH between 3 rigs and managed to lower the voltage on two cards for a reduction in power consumption as well.

I also worked to convert my rig with 4x7870 LE Tahiti(s) to mine LTC. Results are mixed as I can get the GPUs up to 500 KH where they theoretically should be at, but with 90% HW errors or 390 KH with zero HW errors. The things are a pain in the ass.

So, my Pool allows me to set 'difficulty' from 32, 64 and 128. What should I choose GPU mining with 78xx/79xx? What/how does it matter?

Basically, one accepted share of difficulty 32 is equal to 32 shares on difficulty 1. Set it as low as you can as when you have rejected shares you lose 128 shares versus losing 32. You may lose more 32 difficulty as they get submitted more quickly than those of a higher difficulty. From my not exact science of testing that having a lower difficulty is slightly more profitable on pools with higher reject ratios.

[GiLa]

I am running win 7 64bit cgminer 2.11.4 catalyst 13.1
The problem with my 7970 at 900/1350  it goes over 80c degrees
It is a XFX DD card

The 7870 is a Gigabyte OC edition again I am pretty sure with this one its going to take alot of mucking around to find the g spot

"intensity" : "13,12",
"vectors" : "1,1",
"worksize" : "256,256",
"kernel" : "scrypt,scrypt",
"lookup-gap" : "2,2",
"thread-concurrency" : "8192,8192",
"shaders" : "0,0",

[mmitech]

I am running win 7 64bit cgminer 2.11.4 catalyst 13.1
The problem with my 7970 at 900/1350  it goes over 80c degrees
It is a XFX DD card

The 7870 is a Gigabyte OC edition again I am pretty sure with this one its going to take alot of mucking around to find the g spot

"intensity" : "13,12",
"vectors" : "1,1",
"worksize" : "256,256",
"kernel" : "scrypt,scrypt",
"lookup-gap" : "2,2",
"thread-concurrency" : "8192,8192",
"shaders" : "0,0",

shaders 0 ? you have to put a value there , for your 7970 is 2048 and for the 7870 is 1280

[meebs]

try this  -g 2 -I 13 --shaders 2048 -w256 

use cgminer 2.11.4 do not set thread-concurrency let cgminer detect the best value for your cards, maybe try the last beta drivers 13.3, i get more than 720 kh/s with core1040/memory1750 with vcore unervolted and vmemory overvolted , i did order Arctic extreme cooler tried it on 1 card and it is amazing I am getting around 67 c°with these setting comparing to the other cards that are running @ 86 c° I did order more coolers for the other cards, it is worth every cent I did give.

This worked very well for me. I went from:

I 20
TC 24000
g 1

to

I 13
TC 10240
g 2

With the core clock staying at 1025, memory at 1800, and voltage at 1.063 each GPU went from 675 KH to 720 KH.

 I am glad that did help you .

What's weird now is that I went to try and implement the same settings on my rigs downstairs and they only get 650 with almost the exact same settings. The only difference is my upstairs computer has:

"gpu-platform" : "1",

While the downstairs ones have:

"gpu-platform" : "0",

If I try to set the downstairs ones to 1 they won't start cgminer. Guess it is time for more testing.

the platform is kind of a segregation between any physical GPUs and any integrated graphics chips. It all depends on that computers physical hardware setup.

[GeekMan]

I have a 3x 7970 rig.  Two cards happily hash away at 720 and one is stuck below 100?!  When I installed them yesterday, they all were at 720.  I dont get it.

[pox67]

I see there are new drivers out:
13.4 WHQL
13.5 Beta

I am currently using 13.3 Beta.

Has anyone tried the new ones? I won't get a chance until the weekend.

[mige]

Which is the best driver and sdk for AMD 5xxx and 6xxx series ?
Shuld I choose win 7 32 or 64 bit ?

tnx

[Anvi]

For me 13.1 has been faster than 13.3 and 13.4..

Cat13.1 7970 @ 1030 / 1250MHz gets me 720 kHash and 13.3+ 685 kHash

[mmitech]

For me 13.1 has been faster than 13.3 and 13.4..

Cat13.1 7970 @ 1030 / 1250MHz gets me 720 kHash and 13.3+ 685 kHash

I would like to see your magic formula for 720 on 7970 with core 1030 and memory 1250, this doesn't make any sense .


can you post a Picture here to see these settings , if what you are saying is true this means that we are all doing it the wrong way, or somehow you have some good luck or a magic card .

[pox67]

For me 13.1 has been faster than 13.3 and 13.4..

Cat13.1 7970 @ 1030 / 1250MHz gets me 720 kHash and 13.3+ 685 kHash

I would like to see your magic formula for 720 on 7970 with core 1030 and memory 1250, this doesn't make any sense .


can you post a Picture here to see these settings , if what you are saying is true this means that we are all doing it the wrong way, or somehow you have some good luck or a magic card .

I know from my own testing there are sweet spots to these cards. At 950mhz GPU I get the same KHs at 1225mhz memory as 1425mhz.

I think there is something else going with scrypt apart from straight memory speeds or golden ratios.