Originally Posted by un-nefer
I was curious and thought I'd give it a go, but for the life of me I can not get it to work...
I'm using cudaminer with my nvidia gfx cards and when it starts it gives a http 500 error, does anyone know how to fix this?
OK well I gave it another go and I can get it working if I use an external pool and wallet - but I can not get Litecoin-QT to work properly with solo mining and my own wallet.
Anyway, I tried a bunch of different launch options and settled for the follow startup commands:
cudaminer.exe -o stratum+tcp://america.mine-litecoin.com -u username.worker -p mypassword -d 0 -i 0 -l K16x16 -C 2
cudaminer.exe -o stratum+tcp://america.mine-litecoin.com -u username.worker -p mypassword -d 1 -i 0 -l K16x16 -C 2
This allows me to track each gpu as there own worker with mine-litecoin.com
Using K16x16 gives the highest gh/s so far, with each GTX680 doing ~220gh/s. So ~440gh/s when both gpus are running. Not great in comparison to AMD gpus. I have a 4x 5850's in a box that I used for boinc, I might grab them out and see how they go
A little wishful thinking:
Now, using a litecoin calculator, ~440gh/s will churn out ~0.3 ltc a day and make a return of $2.34/day or ~$71 a month if power consumption costs are ignored, however, if the cost of for power is included, it's a totally different outcome completely.
Power cost in my area is currently ~$0.20/kWh, and with both cards rated at ~195w max, they'll consume somewhere close to 390W of power when both are running at 100% - then add an extra 100W for the system and my rig is at ~490W. Now if I add the power costs and usage into a litecoin calculator, the rig will now only make me a measly return of only $0.04/day or ~$1.23 a month (if sold every month)
So the only real way to make money of this using 2x gtx680's is to use solar/green power to offset the power consumed. If my solar panels/green power can offset all the power used by the rig, then that's ~$71/month (current rate) I'll be making (if I sell the ltc each month) - hardly worth the effort tbh - and at that rate, it'd take me almost 2 years just to make the money back on the cost of the rig...
But like the guy in the news the other day, who bought $27 worth of bitcoins in 2009 and held onto them and now they are valued at almost $900K - I'd like to think optimistically about ltc and hope ltc will increase in value over the next 4 years as well.
It then makes more sense to me that if I can mine ~9.37 ltc a month at no cost (thx to solar power) and keep it up for a year, then that's ~112 ltc I've mined - from there, it's just a matter of hoping and preying that ltc can get up to at least $100/ltc in the next couple of years, because then those 112 ltc will be worth over $11K
Saying that, I'd think I'd rather just buy $1000 worth of ltc and keep them in a wallet for the next few years and not even bother about mining ltc at all, and then cash in when they are worth something decent