7950 concurrency problem - page 2. | Bitcointalksearch.org

Singlebyte

hero member

Activity: 854

Merit: 1000

Quote from: mat5x on June 09, 2013, 10:46:31 AM

if we want to reduce clutter then

THIS IS THE WRONG AREA OF THE BOARDS FOR YOUR ISSUE.

7950's are NOT an alternative crypto currency!

moderator move the thread.

fucksakes.

if you are going to abuse the forums, you deserve to be penalized. this is why you were made to wait 4 hrs and post a bunch before you were given permission. there's some responsibility involved you know.

If he is using KHS it is an alt currency issue. And this is where the mods have been pushing these type of questions dipshit. Read the forums a little more. And quit spouting off your fat lips.

mat5x

full member

Activity: 181

Merit: 100

if we want to reduce clutter then

THIS IS THE WRONG AREA OF THE BOARDS FOR YOUR ISSUE.

7950's are NOT an alternative crypto currency!

moderator move the thread.

fucksakes.

if you are going to abuse the forums, you deserve to be penalized. this is why you were made to wait 4 hrs and post a bunch before you were given permission. there's some responsibility involved you know.

Singlebyte

hero member

Activity: 854

Merit: 1000

Did you move from windows 64 machine to a 32 machine?

geronimo77

sr. member

Activity: 476

Merit: 250

tnx guys tomorrow I'll buy extra 2GB of ram and give it a try

Joshman2934

newbie

Activity: 22

Merit: 0

I had the same problem recently for some reason i found that thread concurrency is tied to system ram when you start cgminer so that error will show if your system ram inst high enough i suggest 4gb or more of ram for now 8960 should work for concurrency until you get more ram

also for best results your concurrency should be a multiple of the number of shaders you have

sigesang

member

Activity: 84

Merit: 10

Dont remember the numbers but 2G ram is not enought for scrypt mining, 4G should be fine... it's somthing like 1.6G per 7950 card.. and 2G isnt enougth for system and one card

geronimo77

sr. member

Activity: 476

Merit: 250

Quote from: HuuHachu on June 09, 2013, 09:48:11 AM

A lot of system memory is not required for cgminer.

could it be your lookup gap went to 1 ?
(it basically use 2x the amount of video memory compared to lookup-gap 2 ... but at thread-concurrency arround 20k, it does not use your 3GB of memory anyway)

Or do you have some other video card in your new PC which could be used instead of your 7950 ? (even an integrated one)

Also, no other instance of cgminer running in the background ? (happened to me ^^)

There is not another instance of cgminer in the backgroud lol. I also thought maybe it's about drivers...I tried few versions with no effect.
I tried increasing lookup gap to 3-4 and I can set higher concurrency but my hashrate never goes over 350kH/s.

I have integrated graphics so I'll try to enable it maybe it helps

HuuHachu

full member

Activity: 126

Merit: 100

A lot of system memory is not required for cgminer.

could it be your lookup gap went to 1 ?
(it basically use 2x the amount of video memory compared to lookup-gap 2 ... but at thread-concurrency arround 20k, it does not use your 3GB of memory anyway)

Or do you have some other video card in your new PC which could be used instead of your 7950 ? (even an integrated one)

Also, no other instance of cgminer running in the background ? (happened to me ^^)

geronimo77

sr. member

Activity: 476

Merit: 250

Hi, everyone

I used to mine with cgminer sapphire 7950 3GB with boost usng scrypt. With the settings below card could get about 650 kH/s

old computer: intel q6600, 4gb ddr2

Here are my settings:
setx GPU_MAX_ALLOC_PERCENT 100
cgminer.exe --scrypt -o stratum+tcp://stratum.give-me-ltc.com:3333 -u x -p x -o stratum+tcp://us.wemineltc.com:80 -u x -p x -I 19 --lookup-gap 2 --thread-concurrency 20480 --worksize 256 --shaders 1792 --gpu-engine 1110 --gpu-memclock 1500 --expiry 1 --queue 0

I moved the card into another computer but I'm having problems setting concurrency. These exact settings are not working. When I set concurrency above 12000 cgminer gets me this error:

Error -5:Enqueueind kernel onto command queue. (clEnqueueNDRangeKernel)
GPU0 failure, disabling!
Thread 0 being disabled

With concurrency so low I get bunch of HW. I also tried to lower memory and gpu engine clocks to stock value but result is the same.

new computer: intel G465, 2GB DDR3.

Is it possible that I don't have enough system memory? Btw right now this computer has 1.2 GB unused memory.

Any ideas?

Topic: 7950 concurrency problem - page 2. (Read 2956 times)