problem with my hd7950 - page 3. | Bitcointalksearch.org

asdlolciterquit

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Activity: 1666

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Quote from: P1tBull on December 30, 2013, 06:48:16 AM

IMHO, I personally think something is off with your drivers. You haven't got something correct in the OS/drivers.
If your hardware is working fine at I=13, it should work fine at I=20.

Did you by any chance have an Nvidia card on the system before this ? Are those drivers still on the system?

Edit : Can you do a fresh Windows install ?

I don't know what to say...before this driver videocard i had an ATI hd4870... and when i have uploaded the driver i removed the old one also whit driver sweeper... Sad

a fresh Windows istall for now it's impossibile Sad

@darksoft: if i remove that line, hashrate decrease... Sad

darksoft

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Get rid of this line:

--gpu-threads 2

P1tBull

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IMHO, I personally think something is off with your drivers. You haven't got something correct in the OS/drivers.
If your hardware is working fine at I=13, it should work fine at I=20.

Did you by any chance have an Nvidia card on the system before this ? Are those drivers still on the system?

Edit : Can you do a fresh Windows install ?

asdlolciterquit

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Activity: 1666

Merit: 565

Quote from: asdlolciterquit on December 28, 2013, 08:22:50 AM

Quote from: LiteMine on December 26, 2013, 10:21:15 PM

Quote from: asdlolciterquit on December 26, 2013, 06:35:21 AM

first of all, thanks for your help

@darksoft: sadly, nothing change Sad

@st4nl3y: i have 4gb dd2 1066mhz

@Wilhelm:

i tried different value of thread-concurreny. Value greater than 8192 causes hw error, and values lower than 8192 causes hw error Sad

Where can i find my shaders value? i found this link http://www.game-debate.com/gpu/index.php?gid=1588&gid2=890&compare=radeon-hd-7950-sapphire-3gb-boost-edition-vs-geforce-gt-640-144-shaders. 1164.8 is correct? how can i put it in cgminer string?

i knew that if i overclock my video card, i need to overvolt, not to undervolt...are you sure is safe?

You have 1792 shaders - GPU-Z will tell all. Try an even multiple of that, so 7168, 10752, etc. with -g 1 for 7950's. The wrong thread concurrency will throw HW errors nonstop. I recommend 7168 since it looks like you don't have much RAM.

thanks, and thanks @ for the replies

I try different values of TC, and the ones who works better are 7168 and 8192. With -g 1 hashrate get lower, i don't know why. In any case intensity CAN'T get highter than 13.

Here what i tried:
cgminer.exe --scrypt -o stratum+tcp://stratum.coinium.org:3336 --gpu-threads 2 --thread-concurrency 8192 -I 13 works fine
cgminer.exe --scrypt -o stratum+tcp://stratum.coinium.org:3336 --gpu-threads 2 --thread-concurrency 7168 -I 13 works fine
cgminer.exe --scrypt -o stratum+tcp://stratum.coinium.org:3336 --gpu-threads 2 --thread-concurrency 8192 -I 13 -g 1 lower hashrate
cgminer.exe --scrypt -o stratum+tcp://stratum.coinium.org:3336 --gpu-threads 2 --thread-concurrency 7168 -I 13 -g 1 lower hashrate
cgminer.exe --scrypt -o stratum+tcp://stratum.coinium.org:3336 --gpu-threads 2 --thread-concurrency 10752 -I 13 thread concurrency too high, cgminer error.
Any of this string with I = 14, too many HW error

I will try later with --lookup-gap 0, --gpu-powertune 20 and -w 256 adn see what happen

it seems that nothing change Sad

i don't know what to do Sad

asdlolciterquit

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Activity: 1666

Merit: 565

Quote from: LiteMine on December 26, 2013, 10:21:15 PM

Quote from: asdlolciterquit on December 26, 2013, 06:35:21 AM

first of all, thanks for your help

@darksoft: sadly, nothing change Sad

@st4nl3y: i have 4gb dd2 1066mhz

@Wilhelm:

i tried different value of thread-concurreny. Value greater than 8192 causes hw error, and values lower than 8192 causes hw error Sad

Where can i find my shaders value? i found this link http://www.game-debate.com/gpu/index.php?gid=1588&gid2=890&compare=radeon-hd-7950-sapphire-3gb-boost-edition-vs-geforce-gt-640-144-shaders. 1164.8 is correct? how can i put it in cgminer string?

i knew that if i overclock my video card, i need to overvolt, not to undervolt...are you sure is safe?

You have 1792 shaders - GPU-Z will tell all. Try an even multiple of that, so 7168, 10752, etc. with -g 1 for 7950's. The wrong thread concurrency will throw HW errors nonstop. I recommend 7168 since it looks like you don't have much RAM.

thanks, and thanks @ for the replies

I try different values of TC, and the ones who works better are 7168 and 8192. With -g 1 hashrate get lower, i don't know why. In any case intensity CAN'T get highter than 13.

Here what i tried:
cgminer.exe --scrypt -o stratum+tcp://stratum.coinium.org:3336 --gpu-threads 2 --thread-concurrency 8192 -I 13 works fine
cgminer.exe --scrypt -o stratum+tcp://stratum.coinium.org:3336 --gpu-threads 2 --thread-concurrency 7168 -I 13 works fine
cgminer.exe --scrypt -o stratum+tcp://stratum.coinium.org:3336 --gpu-threads 2 --thread-concurrency 8192 -I 13 -g 1 lower hashrate
cgminer.exe --scrypt -o stratum+tcp://stratum.coinium.org:3336 --gpu-threads 2 --thread-concurrency 7168 -I 13 -g 1 lower hashrate
cgminer.exe --scrypt -o stratum+tcp://stratum.coinium.org:3336 --gpu-threads 2 --thread-concurrency 10752 -I 13 thread concurrency too high, cgminer error.
Any of this string with I = 14, too many HW error

I will try later with --lookup-gap 0, --gpu-powertune 20 and -w 256 adn see what happen

LiteMine

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Activity: 380

Merit: 250

Quote from: asdlolciterquit on December 26, 2013, 06:35:21 AM

first of all, thanks for your help

@darksoft: sadly, nothing change Sad

@st4nl3y: i have 4gb dd2 1066mhz

@Wilhelm:

i tried different value of thread-concurreny. Value greater than 8192 causes hw error, and values lower than 8192 causes hw error Sad

Where can i find my shaders value? i found this link http://www.game-debate.com/gpu/index.php?gid=1588&gid2=890&compare=radeon-hd-7950-sapphire-3gb-boost-edition-vs-geforce-gt-640-144-shaders. 1164.8 is correct? how can i put it in cgminer string?

i knew that if i overclock my video card, i need to overvolt, not to undervolt...are you sure is safe?

You have 1792 shaders - GPU-Z will tell all. Try an even multiple of that, so 7168, 10752, etc. with -g 1 for 7950's. The wrong thread concurrency will throw HW errors nonstop. I recommend 7168 since it looks like you don't have much RAM.

st4nl3y

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Activity: 1050

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Like I said before adjust your TC and I to find the best value with no HW errors. Try this for example:

setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
cgminer --scrypt -o stratum+tcp://global.wemineltc.com:3334 -u xxx -p xxx --thread-concurrency 16000 --lookup-gap 0 --gpu-engine 1120 --gpu-memclock 1500 --gpu-powertune 20 -w 256 -I 18 -g 1

asdlolciterquit

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Activity: 1666

Merit: 565

Quote from: P1tBull on December 26, 2013, 11:07:25 AM

Quote from: asdlolciterquit on December 26, 2013, 08:22:51 AM

Quote from: P1tBull on December 26, 2013, 06:44:44 AM

Have you downloaded AMD App SDK ? Which version ?

yes, i downloaded it when i downloaded catalyst 13.9. I don't remeber the version...one of the last, i suppose..

Make sure you have installed the latest SDK. It is very important for mining. Your SDK version actually affects hashrate more than the drivers. In your Add/Remove Programs, you should see both Catalyst and SDK.
If you want to try a clean install , this link here can help you out with setting up your miner.
This link will help you understand how to overclock and optimize your rig.

I was getting about 575KHS per card with no overclocking at all and I haven't seen HW errors ever.

i'm sure i have istalled SDK with the driver, but in may Add/Remove Programs i see only AMD catalyst install manager... Huh

P.S: thx for the links, very interesting!

itf991

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Activity: 392

Merit: 251

Quote from: asdlolciterquit on December 26, 2013, 10:04:42 AM

Do you have a link for 3.6.0 win 64 version?

i tried 3.9.0 and it didn't recognize my videocard, and 3.2.6 version but i see non difference with cgminer..

Unfortunately, there is no link available any longer. I got this from bfgminer.org a while ago Sad

P1tBull

newbie

Activity: 40

Merit: 0

Quote from: asdlolciterquit on December 26, 2013, 08:22:51 AM

Quote from: P1tBull on December 26, 2013, 06:44:44 AM

Have you downloaded AMD App SDK ? Which version ?

yes, i downloaded it when i downloaded catalyst 13.9. I don't remeber the version...one of the last, i suppose..

Make sure you have installed the latest SDK. It is very important for mining. Your SDK version actually affects hashrate more than the drivers. In your Add/Remove Programs, you should see both Catalyst and SDK.
If you want to try a clean install , this link here can help you out with setting up your miner.
This link will help you understand how to overclock and optimize your rig.

I was getting about 575KHS per card with no overclocking at all and I haven't seen HW errors ever.

asdlolciterquit

hero member

Activity: 1666

Merit: 565

Do you have a link for 3.6.0 win 64 version?

i tried 3.9.0 and it didn't recognize my videocard, and 3.2.6 version but i see non difference with cgminer..

itf991

sr. member

Activity: 392

Merit: 251

I use bfgminer-3.6.0-win64 and this is my scrypt:

bfgminer --scrypt -o stratum+tcp://xxxxxxxx -u y -p z --intensity 17 --worksize 256 -g 1

When I am away from keyboard I put intensity up to 20

I=17 550Kh/s
I=20 650-670Kh/s

No HW error.

Try this out. Any other miners are not working as good as this one. Wink

asdlolciterquit

hero member

Activity: 1666

Merit: 565

Quote from: P1tBull on December 26, 2013, 06:44:44 AM

Have you downloaded AMD App SDK ? Which version ?

yes, i downloaded it when i downloaded catalyst 13.9. I don't remeber the version...one of the last, i suppose..

P1tBull

newbie

Activity: 40

Merit: 0

Quote from: Equate on December 26, 2013, 06:49:13 AM

Quote from: asdlolciterquit on December 26, 2013, 06:35:21 AM

first of all, thanks for your help

@darksoft: sadly, nothing change Sad

@st4nl3y: i have 4gb dd2 1066mhz

@Wilhelm:

i tried different value of thread-concurreny. Value greater than 8192 causes hw error, and values lower than 8192 causes hw error Sad

Where can i find my shaders value? i found this link http://www.game-debate.com/gpu/index.php?gid=1588&gid2=890&compare=radeon-hd-7950-sapphire-3gb-boost-edition-vs-geforce-gt-640-144-shaders. 1164.8 is correct? how can i put it in cgminer string?

i knew that if i overclock my video card, i need to overvolt, not to undervolt...are you sure is safe?

if you overclock your card it need more voltage, undervolt will make the card crash.

Actually no, some cards can be overclocked and undervolted. I am running 3x7950 at 1050/1500 MHz , undervolted to 1.05V/1V/1V and getting 650KHS per card.. Depends on the card and ASIC quality really.
But , yes, the card will crash if you undervolt beyond a point.

Equate

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Activity: 770

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Quote from: asdlolciterquit on December 26, 2013, 06:35:21 AM

first of all, thanks for your help

@darksoft: sadly, nothing change Sad

@st4nl3y: i have 4gb dd2 1066mhz

@Wilhelm:

i tried different value of thread-concurreny. Value greater than 8192 causes hw error, and values lower than 8192 causes hw error Sad

Where can i find my shaders value? i found this link http://www.game-debate.com/gpu/index.php?gid=1588&gid2=890&compare=radeon-hd-7950-sapphire-3gb-boost-edition-vs-geforce-gt-640-144-shaders. 1164.8 is correct? how can i put it in cgminer string?

i knew that if i overclock my video card, i need to overvolt, not to undervolt...are you sure is safe?

if you overclock your card it need more voltage, undervolt will make the card crash.

P1tBull

newbie

Activity: 40

Merit: 0

Have you downloaded AMD App SDK ? Which version ?

asdlolciterquit

hero member

Activity: 1666

Merit: 565

first of all, thanks for your help

@darksoft: sadly, nothing change Sad

@st4nl3y: i have 4gb dd2 1066mhz

@Wilhelm:

i tried different value of thread-concurreny. Value greater than 8192 causes hw error, and values lower than 8192 causes hw error Sad

Where can i find my shaders value? i found this link http://www.game-debate.com/gpu/index.php?gid=1588&gid2=890&compare=radeon-hd-7950-sapphire-3gb-boost-edition-vs-geforce-gt-640-144-shaders. 1164.8 is correct? how can i put it in cgminer string?

i knew that if i overclock my video card, i need to overvolt, not to undervolt...are you sure is safe?

darksoft

sr. member

Activity: 275

Merit: 250

Put this into a command prompt EXACTLY as shown, proper captilization and everything:

setx GPU_MAX_ALLOC_PERCENT 100

And then hit enter. You can't do lowercase. This will solve the hw errors.

Wilhelm

legendary

Activity: 1652

Merit: 1265

Quote from: asdlolciterquit on December 25, 2013, 05:16:29 PM

how can i say that max intensity i can set is 13? Huh

i know is low, but even with 14 i have too much hw error!!!

anyone can tell me why?

Ok first of all put in your shaders value. Look up the amount of shaders that your card supports and add it to your config.

I had hardware errors on my cards (5850 and 5870).
On some forum they said that increasing thread-concurreny could solve it.

I found a specific thread concurrency value that allowed me to go >I=13 without hardware errors.
With value 5824 I got HW errors but at 6144 none.

So my tip is to look up the thread concurrency value that works best.
Try values and look at the amount of HW errors per minute or per 10 minutes and look if upping or lowering the value helps.

Hope you find the golden ratio.

After you do find the perfect value try lowering the voltage to save power and try to overclock.

st4nl3y

legendary

Activity: 1050

Merit: 1000

I would say your thread concurrency and intensity needs tweaking. You have to keep trying different values until you find the best hash and no HW errors and you also need at least 3gb ram to be safe. (you can still run 1,2 or even 3 cards on 2gb but with lower hash rate)

Topic: problem with my hd7950 - page 3. (Read 5045 times)