Bitcoin Forum

hi guys,
one of my machine having and error with cgminer 3.1

http://i39.tinypic.com/9ayd5j.png


my machine runs:
1. Sapphire HD 7950 x2
2. Windows 7 32bit <<< does 32bit have problems with cgminer?
3. AMD 13.4 driver

note: when i mine btc, it has no problem, it can get pretty stable at 530 MH/s
its just when im trying to mine ltc that it has that kind of error.

any help would be much appreciate it,
thanks.

Try using these settings:

cgminer.exe --scrypt -o <pool url> -u <user> -p <password> --shaders 1792  -I 18 -w 256 --lookup-gap 2 --thread-concurrency 21712 -g 1

or I also recommend using GUIminer -scrypt version. Still uses cgminer but has a nice GUI interface. It also has preset settings for your video cards and you can just select those and have at it.

still no luck  :-[

Driver + SDK choice, always.

currently using 13.1 catalyst and 2.8 SDK
which one you recommend for win7 ?

how much ram do you have?
 i had the exact same problem and it was a ram problem. Litecoin needs ram...
7 32 bits is not the problem here

for instance you can try
cgminer.exe --scrypt -o stratum+tcp://eu.wemineltc.com:3333 -u USER -p PASS -I 13 --thread-concurrency 8192
this won t give nice result on mining but if you have only 4gig of ram it'll work and prove that it is effectively a ram problem!

Try smaller thread concurrency....like 12288.

Also make sure you set: (windows)

setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1

Also use 13.1 amd catalyst.  Use ATIman (google it) to remove any old/bad/corrupt versions.

Win7 32 is just fine.

Source:
https://github.com/ckolivas/cgminer/blob/master/SCRYPT-README

im really frustruated, even using the default setting (generate bat from the worker page) still giving HW problems.

http://i43.tinypic.com/35bbi8o.jpg

help pls.. helppp

We need more info.....


Lets see your bat file.  Also what drivers?

 Did you start with "--thread-concurrency 8192"?

Are you over clocking or just starting with stock?

Got same problem. i put 6 more Gos of ram in my system and works but with a smaller thread-concurrency than we are adviced in lots of threads ... ( 2Go -> 8 Go)

my .bat :
--thread-concurrency 17920 --lookup-gap 2 -I 20,20 -w 256 --auto-fan --temp-target 73,73

I dont know where the problem is from and didn't find anything on the web ... Looks like the system ram helped a bit so.
In 1 week i will format/reinstall windows to test from start ...

HW errors are likely caused 95% of the time due to thread concurrency with LTC, or your clocks are off. Unfortunately not every card will work the same and it will take some tinkering.

have you try this?
--thread-concurrency 21712 --lookup-gap 1 -I 20  --auto-fan --temp-target 73,73