error ONLY when mining LTC ?? does cgminer like win7 32bit ?

[18RATTT]

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

Code:

cgminer.exe --scrypt -o stratum+tcp://eu.wemineltc.com:3333 -u USER -p PASS -I 13

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.

[biged214]

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.

[18RATTT]

still no luck 

[-ck]

Driver + SDK choice, always.

[18RATTT]

Driver + SDK choice, always.

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

[glub0x]

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!

[Singlebyte]

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

[18RATTT]

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



help pls.. helppp

[Singlebyte]

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?

[bobykarot]

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 ...

[Cryptocables]

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

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.

[glub0x]

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

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