2 X 7950 - Hashrate getting dropped in 4 to 5 hours after mining is started

cellone

member

Activity: 80

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Quote from: l3jmr on August 20, 2013, 02:56:14 PM

That is probably due to overheating since you have your cards in a case. Look at that VRM value after a couple of hours of running cgminer. Try with an open case for testing purposes or smth.

I opened both the side doors in the case and tried it. But still the problem occurs

zackclark70

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ADT developer

Quote from: hendo420 on August 21, 2013, 05:28:44 AM

One of my rigs is a bit unstable and if left to run 24/7 will eventually end up with a card that reads sick or dead.

I fixed this by scheduling a reboot every 3 hours and setting cgminer to auto start at boot. This has completely cured the problem. I suggest similar measures.

thanks but the problem he is having is that the cards wont sit at 99% they sit at around 90% after only 1 or 2 mins

I have never had it happen before and I have made lots of rigs

hendo420

sr. member

Activity: 420

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One of my rigs is a bit unstable and if left to run 24/7 will eventually end up with a card that reads sick or dead.

I fixed this by scheduling a reboot every 3 hours and setting cgminer to auto start at boot. This has completely cured the problem. I suggest similar measures.

zackclark70

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Activity: 868

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its not the temps as its still the same when fans are at 100% and the cards are a lot cooler

its not the voltage as its just voltage sag and its the same as all other rigs I have made

its not power tune as I have tested that

its not the overclock as I have tried it without

its not the psu ( ax860 )

( I built the rig for him and it got damaged in the post he had it repaired now it does this )

l3jmr

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That is probably due to overheating since you have your cards in a case. Look at that VRM value after a couple of hours of running cgminer. Try with an open case for testing purposes or smth.

chondrite

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Activity: 237

Merit: 100

OP, try adding this line to your cgminer config:
--gpu-powertune 20

Looking at your VDDC values in GPU-Z before and after your miner started it seems like some of your card voltages are being down tuned. This is a common feature on AMD cards to help prevent overheating. By pushing the powertune up to max it should help keep your hashes remain stable over time.

And I would suggest cgminer 3.3.1 as a good replacement miner for reaper.

zackclark70

legendary

Activity: 868

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ADT developer

the problem he is having is that the gpus don't run at 99% all the time they sit lower than that ( I used furmark to test and gpu usage still dosent hit 99%

l3jmr

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Activity: 99

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Quote from: cellone on August 20, 2013, 05:11:52 AM

Whether also I need to have the conf file or its just enough to create a .bat file with these settings and use it.
As I dont have that with me.

Also I am doing solo mining for paycoin now. So will it work for scrypt solo mining

You dont need config file. Just create a .bat file and enter that. It works for scrypt mining since you have the --scrypt tag in the line i gave you.

bitcoin-world.de

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bitcoin-world.de - The european information source

your gpu temperature is too high, so your gpu down clock. Thats the problem.

cellone

member

Activity: 80

Merit: 10

Whether also I need to have the conf file or its just enough to create a .bat file with these settings and use it.
As I dont have that with me.

Also I am doing solo mining for paycoin now. So will it work for scrypt solo mining

l3jmr

member

Activity: 99

Merit: 10

That's probably because you used a wrong thread concurrency number.

Make a .bat file and enter the following text to try it out

Code:

setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1

cgminer --scrypt --shaders 1792 --gpu-engine 1100 --gpu-memclock 1500 --temp-target 75 -I 13 -w 256 --lookup-gap 2  --thread-concurrency 8192 -g 2 --auto-fan -o stratum+tcp://stratum.wemineltc.com:3333 -u username -p password

For pool, use whatever pool you are mining at.

cellone

member

Activity: 80

Merit: 10

I tired CGMiner

When I start cgminer I am getting the error "cgminer.exe has stopped working" .
I am using Windows 8 Professional 64 bit Opperating System

l3jmr

member

Activity: 99

Merit: 10

Maybe the VRM is overheating i had the same problem with my card or you are getting HW errors due to higher intensity. I suggest you try cgminer instead of reaper and with settings -g2 -thread-concurreny 8192 -I 13

cellone

member

Activity: 80

Merit: 10

Hi All,

I have 2 7950 (Sapphire 11196-09-40G HD7950 3GB Vapox-X Graphics Card) cards and my entire system configuration is given below.

The problem is initially while starting the mining task the hash rate is between 1060kh/s and 1080kh/s. But 4 to 5 hours later the hash rate is getting reduced and sometimes dropping to 880kh/s

Can anyone help me in solving this problem.

Mining Software :

Reaper

System Configuration:

Asrock Socket AM3+ 970 Extreme4 5200MT/S Motherboard

Corsair AX Series AX860 860W Platinum Power Supply

Sapphire 11196-09-40G HD7950 3GB Vapox-X Graphics Card (2)

AMD SDX145HBGMBOX Sempron 145 Single-Core Energy Efficient Processor

Generic Hard Disk Drive 320GB SATA 3.5"

Corsair CMX8GX3M2A1600C9 XMS3 8GB (2x4GB) DDR3 1600 Mhz CL9 Performance Desktop Memory Kit

Sharkoon T9 ATX Midi Tower Case - Red

GPU 1 and 2 TRIXX Information:

GPU 1 and 2 TRIXX Overclocking Settings :

GPU 1 and 2 TechPowerUP GPU-Z Graphics Card Details :

GPU 1 and 2 TechPowerUP GPU-Z Sensor Details :

GPU 1 and 2 Mining Details :

Coin conf Settings:

worksize 256 ; aggression 18 ; threads_per_gpu 1 ; sharethreads 18 ; lookup_gap 2 ; gpu_thread_concurrency 20992

Reaper Conf Settings :

kernel reaper.cl
save_binaries yes
enable_graceful_shutdown no
long_polling yes
device 0
device 1

Topic: 2 X 7950 - Hashrate getting dropped in 4 to 5 hours after mining is started (Read 1431 times)