Bitcoin Forum

Hey everyone, I'm very new to litecoin mining but really interested in it all. Now, I've set up the necessary programs to start mining, however, GPU based programs do not seem to want to work for me. Whenever I open them, I get this error instantly:

http://img.photobucket.com/albums/v260/russel_coight/cgminer_zps4e2e2195.jpg

This happens when I use cg miner, Reaper and a couple of others (forgotten their name).
ScryptMiner does work for me, but it's CPU based and I'm only getting 30kH/s.

Please help!

what graphics card have you got and where did you download cgminer from

Sorry, I completely forgot to mention that. It's a 7950 and I got cgminer from here: http://ck.kolivas.org/apps/cgminer/

The rest of my PC specs if you need it: Intel i5 3570K @4.2ghz / Sapphire 7950 / Asrock Z77 Fatal1ty Performance / 8gb Corsair 2000mhz / 750w SilverStone Strider

Did you try the usual stuff? Like redownloading/reinstalling it?

What does GPU-Z about your OpenCL support?

Drivers and/or OpenCL issues are very likely.

Yep, first thing I tried.


When I open GPUZ, I get this error:
http://img.photobucket.com/albums/v260/russel_coight/opencl_zps2bb0d1c1.jpg

I'm not sure what to do from here though!

Try different AMD Catalyst version and / or install this - http://developer.amd.com/tools/heterogeneous-computing/amd-accelerated-parallel-processing-app-sdk/

Basically GPU-Z is saying that your OpenCL is *ucked up, hence miners, which use OpenCL are not working.
OpenCL support is needed to mine on video cards(almost always).

Cheers for that. I already have SDK, so I'll get the new beta drivers for Catalyst (seeing as I already have the latest) and try again. I'll report back.

There are also issues when using certain Catalyst version with certain APP SDK versions..
As it is easier to reinstall SDK - no reboot required, I suggest you start with SDK ; )
You can try different version of SDK or just find version of Catalyst which includes OpenCL already and was tested to work by ATI

Ok, well, now there's no errors when I open GPUZ, the OpenCL box is ticket AND cg miner doesn't instantly close when I open it. However, when I put all my pool details etc in cg miner, it closes itself but with no errors... ???

Create startup script f.e. "start.cmd" write there two lines

cgminer.exe --blah --blah ur params
pause

launch that start.cmd
now you will see what cgminer says

I have no idea what you just said  :-[

1) Open notepad
2) Write there

cgminer.exe --url http://api.bitcoin.cz:8332 -u YOUR_USER -p YOUR_PASSWORD
pause

3) File->Save As-> Locate to the folder where your cgminer.exe is located -> Save as "start_cgminer.cmd"
4) Close notepad
5) Launch "start_cgminer.cmd"

Oky dokes, I've done that and it seems to be working off the GPU now. Progress! Thanks!
However, it doesn't seem to be processing anything though. The GPU is under load, but I'm getting now kH/s results and it keeps on rejecting blocks.

I got such error when my gpu wasnt actually compatible with gpu miners tho it seemed to work on something

Now you need to optimize cgminer setup for your card.
F.e. add to parameters
-w 128 or -w 64 or -w 256
-v or -v 1 or -v 1,1
-I 7 or -I 10
Find the best for your card and run ; )

I would give Ubuntu a try, beats the $hit out of M$ IMO. I can walk you through a mining configuration if you choose to do that.

Look here for all arguments cgminer accepts - https://bitcointalk.org/index.php?topic=28402.0
p.s. If you are mining LTC you should use --scrypt

That's simply not true.
I've tried mining on Windows 2003 x86/x64, Windows Vista x86, Windows 7 x64, Mac OS X 10.6.8, RHEL, CentOS and Ububtu.
I've noticed no correlation between OS and speed.
Though I've noticed straight correlation between mining speed and straightness of the hands ; )
Oh, and Mac OS X just sucks ; )

Where do I add those parameters?  :-[ Man, I feel so dumb. This is all so new to me.

f.e. if you created that .cmd we were talking about before,
you can modify first line -

cgminer.exe --url http://api.bitcoin.cz:8332 -u YOUR_USER -p YOUR_PASSWORD -w 128 -I 8 -v

Also are you mining Bitcoin or Litecoin?

Ah, thought so. Just checking.

I'm (trying to) mine litecoin.

then add
--scrypt
and look for all LTC mining arguments on that link and play with them)

It now just closes itself once I enter all my details. I'll look at the link and see if I can change any further details, but I think I'm a bit of a lost cause. I just can't seem to get this going.
You've been more than helpful.

See if this makes it easier https://bitcointalk.org/index.php?topic=162708.0

Add
pause
to that .cmd
or
add
--text-only 2>c:\temp\cgminer.log

f.e.

cgminer.exe --url http://api.bitcoin.cz:8332 -u lbr.my.worker -p dsdffggr --text-only 2>c:\cgminer.log

then it will log everything in c:\cgminer.log

Also, if it closes instantly - you have supplied invalid arguments

or open a cmd prompt and run it from there

Thanks, I tried this quickly and it seems to work, but it runs off the CPU, even though I entered all the details correctly. It should be running it off the GPU. Any way I can change this?


Cheers, it doesn't close instantly now, but it's also rejecting a lot. Ill keep on fiddling with it and trying other pools.
MinerGUI seems incredibly easier to use, but I can't get the GPU to do the work instead of the CPU.

FYI, you have been incredibly helpful. I have a few scarce ltc's, they'll be coming to you.