help with litecoin mining

[kr15davis]

hello i am new to this hope im doing this right.

i have a evga geforce gt 640 graphics card. everytime i start the guiminer my computer stalls then the screen goes black. it come back on. and the guiminer just sits there saying connecting......

i look in the console window and this is what i found

2014-01-30 16:07:20: Listener for "lite coin": (1s):0.000 (avg):0.000h/s | A:0  R:0  HW:0  WU:0.0/m
2014-01-30 16:07:21: Listener for "lite coin" shutting down
2014-01-30 16:07:25: Running command: "C:\Users\The Gate Keeper\Desktop\New folder (2)\cgminer\cgminer.exe" --scrypt -u kr15davis.wemineltc -p 123 -o stratum+tcp://usa.wemineltc.com:3335 --gpu-platform 0 -d 0 -w 256 -v 1 -I 18 -g 1 -l 1 -T  --thread-concurrency 3550
2014-01-30 16:07:25: Listener for "lite coin" started
2014-01-30 16:07:28: Listener for "lite coin": [2014-01-30 16:07:25] Started cgminer 3.7.2
2014-01-30 16:07:28: Listener for "lite coin": [2014-01-30 16:07:25] Probing for an alive pool
2014-01-30 16:07:28: Listener for "lite coin": [2014-01-30 16:07:25] Pool 0 difficulty changed to 196
2014-01-30 16:07:28: Listener for "lite coin": [2014-01-30 16:07:26] Network diff set to 2.46K
2014-01-30 16:07:28: Listener for "lite coin": (1s):0.000 (avg):0.000h/s | A:0  R:0  HW:0  WU:0.0/m
2014-01-30 16:07:31: Listener for "lite coin": (1s):0.000 (avg):0.000h/s | A:0  R:0  HW:0  WU:0.0/m
2014-01-30 16:07:33: Listener for "lite coin": [2014-01-30 16:07:31] Error: clEnqueueReadBuffer failed error -5. (clEnqueueReadBuffer)
2014-01-30 16:07:33: Listener for "lite coin": [2014-01-30 16:07:31] GPU 0 failure, disabling!
2014-01-30 16:07:33: Listener for "lite coin": (1s):0.000 (avg):0.000h/s | A:0  R:0  HW:0  WU:0.0/m
2014-01-30 16:07:35: Listener for "lite coin": (1s):0.000 (avg):0.000h/s | A:0  R:0  HW:0  WU:0.0/m




any one have any idea whats happening? do i need to buy a new graphic card? any advice will do thanks

[Slimok]

Try that


cgminer.exe --scrypt -o stratum+tcp://freedom.wemineltc.com:3334 -u kr15davis.wemineltc -p 123 -I 13




aaa now i see you have geforce - download cudaminer for g-force. But i thing your hashrate be LOW LOW LOW - no more than 25 kh/s


https://litecoin.info/Mining_hardware_comparison

[kr15davis]

should i just invest in a ati graphics card and i might have less problems?

[Speedy]

cudaminer is ok, but you might not get the fastest speeds with it.

I got 160khash on GeForce 660. I get the same on Radeon 7770.

[kr15davis]

im now using cudaminer with the wemineltc.com

this is the script i write

cudaminer.exe -o stratum+tcp://freedom.wemineltc.com:80 -o kr15davis.wemineltc:123


the error i get is
http request failed: failed connecton to kr15davis.wemineltc:123; no error
json_rpc_call failed, retry after 15 seconds


thanks for the help. i feel like i should get this.

[Smileyftw]

you don't need to buy a new graphic card just a better mining pool

[Sonny]

should i just invest in a ati graphics card and i might have less problems?

The hashrate is much better with ATI/AMD card.
If you really want to do mining, you could try that; or you could direct buy some btc/ltc for investment.

[oxfardk]

AMD cards are so much cheaper and more interesting hardware furthermore you can altcoin mining pretty fast

[Karen98]

you will not be able to make any profit with a GT640. it's just way too slow.