Bitcoin Forum

I tried to mine LTC using a rig with a 5870 and two 5830 that always mined fine BTC (and TRC and PPC too).

I tried both with guiminer-scrypt_win32 v0.03 and cgminer v.2.11.3 with stock clocks and volt settings.
My problem is that they report an output around 18 KHs/s per card, which seems 10-20 times less than expected.
Even the pool (Coinotron) reports the same, and an "Estimated coins/day =  0.106 LTC" (!)
Any idea? 

P.S. The string I used is this:
cgminer -o stratum+tcp://coinotron.com:3334 -u NAME -p PASS --scrypt -I 7,9,9 --thread-concurrency 7168,6200,6200 -g 1 -w 256 --auto-fan --temp-target 70 --temp-overheat 75 --auto-gpu --gpu-engine 500-850,500-820,500-820

But even just this gives the same result:
cgminer -o stratum+tcp://coinotron.com:3334 -u NAME -p PASS --scrypt

Up intensity to 18 should make a big differenceif the cards can handle it. Try to get intensity high as possible without hardware errors.

 Target temps are also a little low but it depends on where you are living and how much you want to push.

Thanks. I tried this:
cgminer -o stratum+tcp://coinotron.com:3334 -u USER -p PASS --scrypt -I 16
and now I get 110 KHs on the 5870 and 62 KHs on the 5830 at stock clocks.
But it's still way too low.

But I seem to remember that stratum implies a different difficulty for each miner so hashrates become insignificant, or s.t. like that. Possible?

Have you tried the settings other people are using from this page?

https://github.com/litecoin-project/litecoin/wiki/Mining-hardware-comparison


5870     850 MHz    1200 MH    cgminer 2.11.4    cgminer --scrypt -o --shaders 1600 --intensity 18 --worksize 256 -g 1 --thread-concurrency 6144

Hashrate is shown correctly when using Stratum on Coinotron, from my experience.

Then I'm clueless. Maybe is because I am still using the driver 11.12 and SDK from Catalyst 11.6, but I really don't feel like updating them.
Well, I'll mine Terracoins then, until someone gives me a good tip.

[EDIT]: it were the drivers: I updated to 13.10 and now it's all fine

Hashrate shows correctly but they dont tell you about the crazy high # of stales due to giant botnets mining on there slowing the whole thing down...

Thats why you dont get the # of coins per day that you should. But it seems to be fairly DDOS resistant so maybe OK as a backup pool.

did u tried using guiminer scrypt ?

Is that so? cgminer gives you feedback for each share, 'accepted' or 'rejected (stale)'. So the stales show up in the statistic. Usually get around 1% stales with stratum.