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

[tacotime]

hi to all,

i tried to start my mining adventure whit litecoin but i had some troubles,

my gpu is the 7750 (gddr3  ) and i tried to use reaper and it gives  me back riceve this error :
Error 6 getting work. See http://curl.haxx.se/libcurl/c/libc
url-errors.html for error code explanations

Couldn't connect to server. Trying again in a few seconds...


google says that reaper don't support litecoin mining.... so i have to ask someone more competent than google


could someone help me?

the url for the pool you are trying to is malformed or you have entered the wrong port, username, or password.

if you have http in front of the pool name it will not work either

personally for a 7750 because of the low gcn core count I would use cgminer and the following config:

Code:

cgminer --scrypt -o http://yourpool.com -u username -p password --thread-concurrency 7168 -I 18 -g 1 -w 256

Make sure you set the memory and gpu speeds correctly too, you should get ~150 kh/s

[ricciolone]

hi
yes i made a mistake with this

tk


i want to try cgminer but it starts asking me pass and pool address!

so how can i set it?




 

[creativex]

hi
yes i made a mistake with this

tk


i want to try cgminer but it starts asking me pass and pool address!

so how can i set it?

You can set it via cgminer.cfg, creating a .bat file to start the program with, or entering it into CGMiner after it's running.

[ricciolone]

ok it works whit a .bat file

but the pool    http://ltc.kattare.com:9332
seems like doesn't work.... so, do you have a pool to suggest?

and at the and is more convenient to by or to mine litecoin if I'm considering the cost of my card energy (75w)

ok i've found a pool that still works and i have an hashrate 94kh/s   i can't overclock my card because overdrive doesn't work...



now i just wait and become reach !!

[creativex]

ok it works whit a .bat file

but the pool    http://ltc.kattare.com:9332
seems like doesn't work.... so, do you have a pool to suggest?

and at the and is more convenient to by or to mine litecoin if I'm considering the cost of my card energy (75w)

That would depend on your electricity costs and current difficulty. The later is low(ish) for the next couple days BTW @ 28.2082

I use ltc.kattare.com:9332, sure you set up your worker, login, and password correctly in the .bat file? Also http://lc.ozco.in:9332 is a fave of mine.

[Bendur]

litecoinpool.org is pretty decent if you want a big name pool with good stats

[-ck]

New cgminer release with scrypt goodies, including block solve detection and fixed stratum support.

[tacotime]

Kay, updated!

edit: It went down to -30C recently and I checked the power usage of my outdoor rig with 3x 7950s; it went from 750w to 650w, an almost 15% decrease in power consumption!  Anyone looking to save on power costs should consider outdoor mining.

[hope2907]

12.10 plus newest sdk plus newest cgminer
agg 13
thread concurrency 8192
@1135/1375
give me 600khs

[420]

what happened to the litecoin mining hardware comparison page

[crazyearner]

I need some help

I have 1x 5770 mining away and wont budge past 140KH/s any advise on what to alter change or do. Using cgminer and also bfgminer latest versions

[salfter]

personally for a 7750 because of the low gcn core count I would use cgminer and the following config:

Code:

cgminer --scrypt -o http://yourpool.com -u username -p password --thread-concurrency 7168 -I 18 -g 1 -w 256

Make sure you set the memory and gpu speeds correctly too, you should get ~150 kh/s

Going by the FAQ, that thread concurrency value is way too high.  On mine, it ends up throwing an error:

Code:

Error -61: clCreateBuffer (padbuffer8), decrease CT or increase LG
Failed to init GPU thread 0, disabling device 0
Restarting the GPU from the menu will not fix this.
Try restarting cgminer.

Values above 2048 make no difference; this is 4x the number of shaders (512) in the 7750.

With a card factory-overclocked to 880 MHz, I'm getting 125-130 kH/s with cgminer.  reaper produces closer to 160 kH/s. (Both numbers are what the respective programs report on-screen.)  I'd post my reaper settings, but they're nothing special and my mining rig locked up while I tried overclocking it further with cgminer. I gave it this to reboot, since neither X nor cgminer were killable (not even "kill -9"able):

Code:

for i in r s b; do echo $i >/proc/sysrq-trigger; done

but it's not come back up yet after three minutes...might be doing a fsck.  It might be offline until I get home and power-cycle it.  :-(

[tacotime]

thread-concurrency of 8000 works fine on my 7770 using cgminer and pulling 190kh/s.  I'm not sure why it's crashing for you.

what thread-concurrency do you use with reaper?

[salfter]

thread-concurrency of 8000 works fine on my 7770 using cgminer and pulling 190kh/s.  I'm not sure why it's crashing for you.

what thread-concurrency do you use with reaper?

Here's my reaper/litecoin.conf...looks like 6144:

Code:

host **REDACTED**
port 9332
user **REDACTED**
pass **REDACTED**

protocol litecoin

worksize 256 
aggression 18
threads_per_gpu 1
cpu_mining_threads 0
sharethreads 4
lookup_gap 2
gpu_thread_concurrency 6144
long_polling yes

and my cgminer.conf:

Code:

{
"pools" : [
        {
                "url" : "**REDACTED**",
                "user" : "**REDACTED**",
                "pass" : "**REDACTED**"
        }
]
,
"intensity" : "13",
"vectors" : "1",
"worksize" : "256",
"kernel" : "scrypt",
"lookup-gap" : "1",
"thread-concurrency" : "2048",
"gpu-engine" : "0-0",
"gpu-fan" : "0-0",
"gpu-memclock" : "0",
"gpu-memdiff" : "0",
"gpu-powertune" : "0",
"gpu-vddc" : "0.000",
"temp-cutoff" : "95",
"temp-overheat" : "0",
"temp-target" : "0",
"algo" : "scrypt",
"api-port" : "4028",
"expiry" : "120",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"gpu-threads" : "1",
"log" : "5",
"queue" : "1",
"scan-time" : "60",
"scrypt" : true,
"temp-hysteresis" : "3",
"shares" : "0",
"kernel-path" : "/usr/lib/cgminer"
}

This is a dedicated mining box, usually running with just power and network cables plugged in (no monitor).

Just now, I tried setting cgminer's thread-concurrency to 6144.  It tried to start, but crashed before it could get going.  Bumping it back down to 2048 got it running at the reduced rate.  I've switched it back to reaper.

(As for versions, cgminer is v2.10.4 and reaper is v13b4. Both are 64-bit builds on AMD64 Gentoo.)

[tacotime]

Code:

"lookup-gap" : "1",

That's probably your problem, lookup-gap of 1 doubles the amount of memory required.  Notice it's 2 in reaper.

[SAC]

Just now, I tried setting cgminer's thread-concurrency to 6144.  It tried to start, but crashed before it could get going.  Bumping it back down to 2048 got it running at the reduced rate.  I've switched it back to reaper.

(As for versions, cgminer is v2.10.4 and reaper is v13b4. Both are 64-bit builds on AMD64 Gentoo.)

Are you using in the shell before starting cgminer.

Code:

export GPU_USE_SYNC_OBJECTS=1
export GPU_MAX_ALLOC_PERCENT=100
export DISPLAY=:0

[salfter]

(As for versions, cgminer is v2.10.4 and reaper is v13b4. Both are 64-bit builds on AMD64 Gentoo.)

Are you using in the shell before starting cgminer.

Code:

export GPU_USE_SYNC_OBJECTS=1
export GPU_MAX_ALLOC_PERCENT=100
export DISPLAY=:0

They're in the script that launches cgminer:

Code:

DISPLAY=:0 GPU_USE_SYNC_OBJECTS=1 GPU_MAX_ALLOC_PERCENT=100 screen -dmS miner cgminer

This starts cgminer in a named screen session.

[bitcool]

sorry if this has been answered somewhere, I searched but couldn't find it.

-- Is there a modified version of Linuxcoin for Litecoin mining? I am looking for something that can be run from a USB drive

[tacotime]

ty guys for donations   i have updated some of the links!

[tacotime]

After testing today I found that 7950s respond the same way to core/mem ratios as the other 7xxx cards, here I am pulling 650kh/s per card with 3x 7950s:



With mem at 1550 MHz and core at 1150 MHz my hash rate actually goes down to about 560 kh/s per card