Topic: problem with my hd7950 - page 2. (Read 5045 times)

Obvously you don't have enough memory. In order to increase TC you have to have enough memory usable for windows. I bet you run Win 32bit which gives only 3GB that is insufficient, or otherwise have some other computer configuration that does not allow to use enough memory.

it is now low at all... all my 7900 and r9280x cards has the same , 8192 and 13 intensity.
Try to mind correct cpu and memory speed. this helped me

i decided to format my pc and to do a fresh istall.

All i get is:
1)my gpu's driver crash if i use 1100 core clock, frequency that worked fine before the format.
2)SAME exacly situation, (can't use I> 13 etc etc) but lower hash/rate because point 1).

NO COMMENT!

what should i do? an other fresh istall?

Did you solve your porlbem?

If not, try to reinstal your drivers (with restart) and then run CMD with admin rights, use both setx 100 and 1 lines, then exit cmd and run it once again!

Now try the very basic cgminer config with pool adress, user and password, and -I 19. Dont use thread, gpu, nothing, only -I 19.
Tell me what you have

thanks everyone.

@mgoldfinger: very usefull link!

ohh, and if you keep running low TC (e.g. 8000 something) set -g 2 and -I 13

not ideal, but better than nothing

https://bitcointalksearch.org/topic/m.4279845

setx GPU_MAX_ALLOC_PERCENT 100   

is correct, the other is not

i noticed an other thing: if my cpu is at 100% my hashrate slowly decrease until it's more or less 15/20% lower.

anybody can tell me why?

now i'm little confused. I have to start cgmier everytime with a prompt and write that line before?

P.S: i will try cgminer 3.1.1, thx!

first of all, thx for the reply.

i have some questions:
1)what's the difference between set GPU_MAX_ALLOC_PERCENT and setx GPU_MAX_ALLOC_PERCENT lines? i only have used setx GPU_MAX_ALLOC_PERCENT = 100... 

2)my vc is already OC with MSI afterburn, but i didn't changed .cgf file, i did everything by menu. Anyways, i check MSIAfterburner.cfg and i see that UnofficialOverclockingMode is already set to 1, but there is no setting for UnofficialOverclockingEULA. I tried to set it = 1, but when i save it says that i have no autorization to save it...i don't know why. I'm running win 7 64 bit as administrator...

now my clock are: mem@1600, engine@1020

Also, I forgot to mention, put the del *.bin at top of command to remove previous scrypts. Like this:

del *.bin
set GPU_MAX_ALLOC_PERCENT=100
setx GPU_MAX_ALLOC_PERCENT 100
cgminer.exe --scrypt -I 20 -w 256 --gpu-engine 1000 --gpu-memclock 1400 --no-submit-stale


Also, I found out using cgminer 3.1.1 is a lot more stable than 3.7.2, since I use 3.1.1 I get more hashing power... and now my rigs never freezes!

For MSI R7950, I get 600kh/s and 70c constant temp with (I have a little help from the -20c outside temperature):

set GPU_MAX_ALLOC_PERCENT=100
setx GPU_MAX_ALLOC_PERCENT 100
cgminer.exe --scrypt -I 20 -w 256 --gpu-engine 1000 --gpu-memclock 1400 --no-submit-stale

You should also unlock MSI afterburner :

1st - Dowload the latest MSI AfterBurner link located in Update above and install.
2nd - Locate the folder where MSI Afterburner installed to, open it, and locate the CFG file named MSIAfterburner. When you 1st dbl click this file it will ask you what program you want to use to open it, choose "Notepad" and click "ok" Once you have the MSIAfterburner CFG file open in notepad you need to change a couple of settings near the bottom:

UnofficialOverclockingEULA = I confirm that I am aware of unofficial overclocking limitations and fully understand that MSI will not provide me any support on it
UnofficialOverclockingMode = 1 (to keep PowerPlay active (may not work on old ASICs), 2 to traditionally disable PowerPlay or to 0 to temporary disable unofficial overclocking path)<--Do not type this, just for reference I have mine set to = 1

After you have made these changes, DO NOT forget to click "file" and "save" before exiting notepad, or your changes will not take into effect!"

i don't know what to say...

until now in any setting that i've used i've always had HW error with above 13 intensity. I see non changes with  one or two GPU thread, i see  non changes with every values of TC i ever tried.

What values of TC should i try??? Values above 8192 are impossible to me..

It's, insane!! throughout this day my hashrate decrease from 500kh/s to 400kh/s without any changes. ANY. It doesn't make any sense!!

always the same error
If i use greater value i have this error--->
maximum buffer memory device 0 supports says 536870912
your script setting come to 1468006400
error -61 ...decrease TC or increase LG.
failed to init GPU thread 0 disagling device 0

i can't use tc values so high

P.S: i used an other pool..

Don't play with the lookup gap, it's not a variable that you're supposed to mess with.

You don't seem to be trying enough variations of thread concurrency.


Only run one GPU thread with your 7950, otherwise you will always have hardware errors above 13 intensity.

cgminer doesn't 'come with opencl', it compiles kernels that speak the language of opencl. OpenCL is part of the standard AMD drivers (APP specifically) and has been for a good while now. You normally only need the SDK for development or kernel analysis.

You don't need the SDK as cgminer has opencl built into it.

Running 640khs avg with these settings using the latest CCC drivers.

Thread-concurency 22400
Gpu-core 1079
Gpu-mem 1250
Voltage in Afterburner 1.019
Intensity 19

Really don't need to set anything else in the config.

Use this and tell me what you get:

setx GPU_MAX_ALLOC_PERCENT 100
cgminer.exe --scrypt -o stratum+tcp://stratum.coinium.org:3336  -g 1 --thread-concurrency 22400  -I 20 

i did it...i had hw error, even with 14 of I

Remove that line and increase your intensity