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Topic: Consolidated Litecoin Mining Guide for 5xxx, 6xxx, and 7xxx GPUs - page 32. (Read 624200 times)

SAC

sr. member

Activity: 322

Merit: 250

Quote from: salfter on January 17, 2013, 07:38:29 PM

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

tacotime

legendary

Legendary level

Activity: 1484

Merit: 1005

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.

salfter

hero member

Activity: 651

Merit: 501

My PGP Key: 92C7689C

Quote from: tacotime on January 17, 2013, 12:19:04 PM

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

legendary

Legendary level

Activity: 1484

Merit: 1005

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

hero member

Activity: 651

Merit: 501

My PGP Key: 92C7689C

Quote from: tacotime on December 21, 2012, 03:12:14 PM

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. :-(

crazyearner

legendary

Legendary level

Activity: 1820

Merit: 1001

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

420

hero member

Activity: 756

Merit: 500

what happened to the litecoin mining hardware comparison page

hope2907

sr. member

Activity: 432

Merit: 250

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

tacotime

legendary

Legendary level

Activity: 1484

Merit: 1005

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.

-ck

legendary

Legendary level

Activity: 4088

Merit: 1631

Ruu \o/

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

Bendur

member

Activity: 60

Merit: 10

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

creativex

sr. member

Activity: 434

Merit: 250

Quote from: ricciolone on December 22, 2012, 02:22:35 PM

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.

ricciolone

full member

Activity: 158

Merit: 100

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

sr. member

Activity: 434

Merit: 250

Quote from: ricciolone on December 22, 2012, 01:18:04 PM

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

full member

Activity: 158

Merit: 100

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?

tacotime

legendary

Legendary level

Activity: 1484

Merit: 1005

Quote

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

full member

Activity: 158

Merit: 100

hi to all,

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

my gpu is the 7750 (gddr3 Sad

Sad

) 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?

tacotime

legendary

Legendary level

Activity: 1484

Merit: 1005

thanks for the fix!!

-ck

legendary

Legendary level

Activity: 4088

Merit: 1631

Ruu \o/

That change is in the latest cgminer, 2.10.2

SAC

sr. member

Activity: 322

Merit: 250

Quote from: tacotime on December 18, 2012, 12:51:45 PM

I wonder if removing

Code:

bool detect_stratum(struct pool *pool, char *url)
{
...
if (opt_scrypt)
return false;
...
}

from cgminer.c will fix this.

Looks like it should give it a try and see what breaks.

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Bitcoin Forum>Alternate cryptocurrencies>Mining (Altcoins)

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