EDIT:

something wery funny happend to me :-). Today morning I took out MSI GPU and run only on Gigabyte GPU, but cgminer wasnt able to start, it wrote error61 ... Finally i had to dissable internal Intel GPU (was set as primary) and set as primary GPU Gigabyte in BIOS. Now cgminer works fine, but mining performance of Gigabyte fall down to max 600 kH/s :-D (no CPU mining use).
I tried to change PCIex slots to slot 1, because Gigabyte was in slot 2 (no 1), but nothing has changed.

I used the same setting as before, same TC, only change is that I removed MSI GPU.
I tried to reinstall GPU drivers, nothing has changed.

It seems to GPU doesnt run on 100% of its performance (because of temperature, fan speed atd).

Any idea what is wrong now :-)


PS: thanks for CPU settings, I will try it later.

Hi all and thanks for help,

I tried almost everything I has read here but Linux and external fan, nothing works :-)

For this moment I try it in open case, my case is horizontally on the table.

1. I tried --gpu-vddc and --gpu-engine (first command change nothing, second commnad doesnt work, cgminer wrote unknown parametr).

2. I Tired MSI afterburner, but Core Voltage is not possible to change (I tried changed settings and enabled it, but nothing change, it seems to be locked somehow). When I reduced Core Clock, Memory Clock and Power Limit, GPU freezed whole OS and it needed to be restart. Default settings are +20, 1050 and 1500.

3. True is, that 100% of fan speed is only about 3035 RPM on that GPU, Gigabyte has about 3600 RPM on 100% of fan speed.

4. I compared a productivity of those 2 GPU cards, Gigabyte has about 725 kH/s in Controcoin, cgminer shows about 580 - 820 kH/s, temperature max 89 °C, MSI has it same, it seems sometimes a little bit more, but temperature 100°C :-).


So I decided to return MSI GPU to store I bought it, I can return it in 14 days from purchase, and change it to Gigabyte GPU same or higher type.


Thank you all for your help ...


PS: I have one question from different topic, I Tried to mining in GPU a CPU (it is about 120 kH/s :-) but when I power on GPU mining and power on CPU minig, the hash of GPU fall down to about 250 kH/s - 350 kH/s, my question is WHY :-)

Hi, thanks fo reply,

i tried your settings today morning, but nothing has changed, look at video (Google Disk, you have to download it, Gdisk doesnt know to play it)

https://drive.google.com/folderview?id=0Bw93waNBnEbeX2puNU9Mc1VYTnM&usp=sharing

I try to update GPU bios, but I never did it before :-)
Is possible, that GPU card is broken ?


Thanks very much ...

Hi, PLEASE help me,

I try to mine litecoins, I bought 2 GPU, both R9 280x, one is Gigabyte, one MSI.
Run on W7 x64, cgminer 2.7.3., latest Catalyst driver (13.2) and APP SDK.

My trouble is that cgminer doesnt regulate temperature on MSI GPU, so the temperature rises to 100°C ...
On Gigabyte GPU is temperature about 83 °C.

Settings:

MSI
export DISPLAY=:0
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1

C:\Cgminer\cgminer.exe --scrypt -o stratum+tcp://coinotron.com:3334 -u netrat.user -p passwd -d 0 -I 13 -g 2 -w 256 --thread-concurrency 8192 --gpu-powertune 20 --temp-target 75 --temp-cutoff 80 --auto-fan


GIGABYTE
export DISPLAY=:0
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1

C:\Cgminer\cgminer.exe --scrypt -o stratum+tcp://coinotron.com:3334 -u netrat.user -p passwd -d 1 -I 13 -g 2 -w 256 --thread-concurrency 8192 --temp-cutoff 90 --temp-overheat 85 --auto-fan


THANKS very much for any help, I dont want to destroy that GPU ... :-)