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

[Prelude]

Im having some issues trying to get cgminer working with my 7950.  I've figured out how to set up a conf file for whatever Im mining, and to launch the miner and get it hashing properly.  My problems stem from not being able to use settings other 7950 users say work fine for them, and only topping out at 300 kh/s when I avg over 500 using the guiminer for scrypt.

What typically happens is I get a error saying I must lower either thread concurrency or lg when I enter the settings other 7950 users post, and when I can get it to work by lowering those settings the max I get out is around 300.  Is there a reason my cgminer is thinking my card can't handle the settings it should be able to handle?

Thanks

Try not setting thread concurrency, use this instead: -I18 --shaders 1792 -g 2

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[bitbitcoincoin]

Im having some issues trying to get cgminer working with my 7950.  I've figured out how to set up a conf file for whatever Im mining, and to launch the miner and get it hashing properly.  My problems stem from not being able to use settings other 7950 users say work fine for them, and only topping out at 300 kh/s when I avg over 500 using the guiminer for scrypt.

What typically happens is I get a error saying I must lower either thread concurrency or lg when I enter the settings other 7950 users post, and when I can get it to work by lowering those settings the max I get out is around 300.  Is there a reason my cgminer is thinking my card can't handle the settings it should be able to handle?

Thanks

Try not setting thread concurrency, use this instead: -I18 --shaders 1792 -g 2

hashrate was much higher, reaching the 500s which was great.  Only bad thing was I got constant "GPU0 invalid nonce HW errors", so Im still missing something.   

[Prelude]

Im having some issues trying to get cgminer working with my 7950.  I've figured out how to set up a conf file for whatever Im mining, and to launch the miner and get it hashing properly.  My problems stem from not being able to use settings other 7950 users say work fine for them, and only topping out at 300 kh/s when I avg over 500 using the guiminer for scrypt.

What typically happens is I get a error saying I must lower either thread concurrency or lg when I enter the settings other 7950 users post, and when I can get it to work by lowering those settings the max I get out is around 300.  Is there a reason my cgminer is thinking my card can't handle the settings it should be able to handle?

Thanks

Try not setting thread concurrency, use this instead: -I18 --shaders 1792 -g 2

hashrate was much higher, reaching the 500s which was great.  Only bad thing was I got constant "GPU0 invalid nonce HW errors", so Im still missing something.   

HW: should be at 0 if all is good. Try adding -w 256 and lowering -I # until HW: = 0

[bitbitcoincoin]

HW: should be at 0 if all is good. Try adding -w 256 and lowering -I # until HW: = 0

using cgminer.exe --scrypt -o X -u X -p X -w 256 -v 1 -l 2 -I 18 --shaders 1792 -g 2

lowering -I # only lowers my hashrate it seems, still getting about 1 error per sec so it's no where near 0 hehe.

Thanks again

[Prelude]

HW: should be at 0 if all is good. Try adding -w 256 and lowering -I # until HW: = 0

using cgminer.exe --scrypt -o X -u X -p X -w 256 -v 1 -l 2 -I 18 --shaders 1792 -g 2

lowering -I # only lowers my hashrate it seems, still getting about 1 error per sec so it's no where near 0 hehe.

Thanks again

Hmm... Well, Im not too familiar with 7950 tweaking, but keep it simple for now.. Remove -v 1 -l 2

Try: cgminer.exe --scrypt -o X -u X -p X --scrypt --I 18 -- shaders 1792 -g 2 -w 256

Also remove overclock until you find settings that work without HW errors, once you do then you can start OCing. Good luck!

[Scratch]

Trying to squeeze more out of my Club3d Royal King 7870.

Conf:

worksize 256
aggression 19
threads_per_gpu 1
sharethreads 18
lookup_gap 2
gpu_thread_concurrency 15232

16,000 TC
.944v 850/1250 360kh
.944v 850/1285 345kh
.944v 850/1225 360kh
.944v 875/1225 363kh
.944v 885/1225 366kh
.944v 910/1225 Crash
.962v 910/1225 372kh
.962v 910/1250 377kh
.962v 910/1270 355kh
1.000v 950/1250 374kh

15,232 TC

1.225 1000/1450 388Kh

I've tried tweaking stuff after that last setting but no matter what I do and it running full tilt I cant surpass 390kh. Considering the hardware comparison has them up to 470 I think I should be able to get more. Suggestions?

EDIT: Nvm, misread clocks. Sec...

[eretron]

Maybe someone will find this useful:

I'm using 4x 7970 cards, all on x1 > x16 extenders.

Was getting max 690KH/s per card, but with old MB, CPU and only 2 of those card I was getting ~730Kh/s.

I've changed priority of cgminer.exe process in Task Manager from Normal to High, and voila ~730 again per card

So just make .bat with start "cgminer" \high in front and it will run it in high priority all the time.

That's weird, does cgminer.exe use any cpu processing power for the 7970's?

I don't think so, but I've noticed on old rig that, for example when I log via teamviewer, hashrate drops. So that was my hint for CPU related issue. Don't know if I'm the only one noticing this, but it would be nice if someone else could confirm/deny this.

what settings are you using for cgiminer?
and what gpu/mem frecv ?

Gygabyte 7970 OC model stock @ 1000mhz / 1375mhz mem

CoreClock 1040
Memclock 1500

cgminer 3.1.1 -I 13 -g2 -w 256 --thread-concurency 8192 --shaders 2048

[zxc003]

2x Sapphire HD7850 1GB:
Overclock with MSI Afterburner 3 beta at 1165 GPU/1225 MEM @1145mV, power limit 20%
batch file looks like:

Code:

timeout 30
color 2
cgminer.exe --scrypt -o  stratum+tcp://pool:port -u user -p pass --worksize 256 --lookup-gap 2 --thread-concurrency 4800 -g 2 --intensity 12

Result is:

[qiuness]

qq guys,

I played around setting up CGMiner for BTC.. I was wondering if there is a similar guide for BTC.
I`m getting lower hashrates with cgminer on BTC then i did on LTC

[thedonvon]

I am having trouble running cgminer with windows 8 x64.  It will not run with --scrypt.  I get a "cgminer has stopped unexpectedly" error.  Any suggestions?  I am running catalyst 13.4.

[Rascal]

Optimal thread concurrencies for 7xxx family:
7770: 8000 (200 kh/s, aggression 19)
7850: ?
7870: 15360 (400 kh/s, aggression 19)
7950: 21712 or 24000 (~575 kh/s)
7970 (cgminer): 22392 (~700 kh/s can be obtained with a core/memory ratio of 0.57)
7970 (reaper): 20992, 21712, or 24000 (~
7750: ?
7770: 8000 (200 kh/s, aggression 19)
7850: ?
7870: 15360 (400 kh/s, aggression 19)
7950: 21712 or 24000 (~575 kh/s)
7970 (cgminer): 22392 (~700 kh/s can be obtained with a core/memory ratio of 0.57) or 8192 (-g 2 -w 256 -I 13)
7970 (reaper): 20992, 21712, or 24000 (~650 kh/s can be obtained with reaper and core/memory ratio of 0.57, e.g. 900 MHz core and 1580 MHz memory.  Over 725 KH/s can be achieved with memory overvolting.)

7870: 22208 cgminer (470 KH/s, aggression 19)
7950: 33208 cgminer (650 KH/s, aggression 19)

[FullLife]

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.

I never thought to look at it like that.  This is great, thanks!

[qiuness]

I'm trying t setup cgminer.confg so that i only change settings on a single file then launch the appropriate pool bat.

For ex.:

My bat:
cgminer --scrypt -o stratum+tcp://eu.wemineltc.com:3333 -u user -p x -o stratum+tcp://stratum.give-me-ltc.com:3333 -u user -p x

This should call the cgminer conf to lead the rest of the settings.
Any idea how i can do that?

if i remove the pools from the cgminer.conf, i get a JSON error.

Thanks

[pekv2]

I'm trying t setup cgminer.confg so that i only change settings on a single file then launch the appropriate pool bat.

For ex.:

My bat:
cgminer --scrypt -o stratum+tcp://eu.wemineltc.com:3333 -u user -p x -o stratum+tcp://stratum.give-me-ltc.com:3333 -u user -p x

This should call the cgminer conf to lead the rest of the settings.
Any idea how i can do that?

if i remove the pools from the cgminer.conf, i get a JSON error.

Thanks

I don't think it can work like this, because the conf overrides all if created, no matter what. I could be wrong though.

[FullLife]

Can anyone explain this to me?  
In GUIMiner (scrypt version), I can use thread concurrencies higher than 8192, but in CGMiner, I can't.  When I try to use values higher than 8192, I get the dreaded "Error -61:..." message.  This doesn't really make any sense to me at all.  GUIMiner is nothing but a frontend for CGMiner!

Fixed my thread concurrency problem and wanted to post it here in case anyone else is having the same problem. 

I'm using Win7 Ultimate SP2 x64 with cgminer 3.1.0.  Even after I added the two specific lines in my .bat file that were supposed to fix this issue (setx GPU_MAX_ALLOC_PERCENT 100, setx GPU_USE_SYNC_OBJECTS 1), I still got the error message.  Well, I just learned today that the GPU_MAX_ALLOC_PERCENT 100 command is case sensitive.  When I went into the environmental variables in Win7 to check it, it was saved in all lowercase letters for some reason.  As soon as I saved it in all caps, it fixed the problem, no more error message.  What's weird is, the other command (GPU_USE_SYNC_OBJECTS 1) was already in all caps.  I don't know how the first command ended up being saved as all lowercase.

Anyway, problem solved.

[zenrog]

Anything for msi 7850 2gb oc?
I can't reach 340 kh/s, and guys with msi 7850 1gb reach 410 kh/s why?
And my asic quality is 78% and 76%.
Tried 1050/1250, 1100/1350, 1100/1250, 1150/1250, 1000/1200 etc...
Thread_concurrency 8192
vectors 1
gpu_threads 1
intesity 18

[hate_the_face]

anyone know what the current best bet for driver and SDK version for a 7870ghz would be?

thanks

[zezeze2013]

Anyone give me some advice about run LTC with MSI 7950 Twin Frozr 3GD5/OC   (performance ,save power)

my config :

cgminer --scrypt -I 20 -g 1 -w 256 --thread-concurrency 21712 --shaders 1792 --gpu-engine 1050 --gpu-memclock 1250 --gpu-vddc 1.063



my hashrate about 610-625kh/s.Is this a good choice?

I use driver on MSI website :MSI Graphics Driver 9.002 amd_9002_v78_vga (Window 7 x64)

Thank for help 

[Kiders]

Hello . hoping that someone with 6870 gpus or some knowhow can help me out.
I just started mining LTC but im getting less share per minute then with BTC mining. im getting few HW on one of the cards. alot of both if i change thread concurrency

color 02
cgminer --scrypt -o http://stratum.give-me-ltc.com:3334 -u xxxx -p xxxx --shaders 1120 --thread-concurrency 4800 --gpu-engine 900 --gpu-memclock 1000 -I 13 -g 1 -w 64 --temp-cutoff 95

xfire 6870 6850
win 7 64
latest drivers
latest sdk
works perfectly fine with btc

Im not sure what the thread concurrency should be at but 4800 gives me best results so far

[slarty]

Anyone give me some advice about run LTC with MSI 7950 Twin Frozr 3GD5/OC   (performance ,save power)

my config :

cgminer --scrypt -I 20 -g 1 -w 256 --thread-concurrency 21712 --shaders 1792 --gpu-engine 1050 --gpu-memclock 1250 --gpu-vddc 1.063



my hashrate about 610-625kh/s.Is this a good choice?

I use driver on MSI website :MSI Graphics Driver 9.002 amd_9002_v78_vga (Window 7 x64)

Thank for help 

I think this is not too bad for the Card, at least not if I compare it with what others receive.  But with some tweaking it should be a couple of kH/s more.

on a side note: in your config you can skip the shaders option, it is obsolete as long as you use the thread-concurrency option. And perhaps it is worht setting the auto-fan feature.

Rgds