Quote from: shawnp0wers on February 17, 2012, 04:05:28 AM

If the efficiency is 5-6 times that of a CPU, it's still a far cry from Bitcoin's CPU-worthlessness. It would be interesting to see the math concerning how worthwhile it would be to mine BTC vs LTC on a theoretical GPU scrypt miner.

Perhaps the ability to mine LTC with a GPU will still be moot. If it's more economical to mine for BTC and buy LTC with the profits, it would be foolish to mine LTC with a GPU even if possible.

Anyone like crunching numbers? What would the price of LTC need to be in order to make GPU mining worthwhile? I don't think we're there, but like I said, I haven't run the numbers at all.

Well,

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[04:12:10] <@PooL-X> The expected generation output, at 200 KHps, given current difficulty of 1.5926655, is 126.31 LTC per day, 5.26 LTC per hour, Estimated time to find a block is 9 hours 30 minutes 3 seconds

That's the amount of kh/s mtrlt was saying, or at least an average: that's $1.20 a day.
Now, with my 6870 I get 300mh/s on bitcoin...which earns me an avg of 0.2BTC a day, which is around $1/day
So really they're about equal, if bitcoin price rises any more, it's more worthwhile to mine bitcoins on a GPU.

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A gpu rig consisting of 69xx series gpus can produce 998kh @ 920 watts at the wall

Okay that's

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[04:15:36] <@PooL-X> The expected generation output, at 998 KHps, given current difficulty of 1.5926655, is 630.27 LTC per day, 26.26 LTC per hour, Estimated time to find a block is 1 hour 54 minutes 15 seconds

630 LTC a day, thats around $6.30 a day, no idea how much they'd get with bitcoin, probably a LOT more $ value in GPU mining on bitcoin with them...