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Cablepair said in another thread he already had taped out and cut wafers, if all were waiting on is the pcbs we should have these extremely quickly. Probably even before bfl.
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I'm curious to see if someone were to come to the scene with a 100gh/s miner, if bfl would match that.
Just show the damn things working, not reasons to give you more money.
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Hmm, thanks. I still can't get past my inability to use anything beyond 8192 for gpu_thread_concurrency in litecoin.conf. Is there any other file I should be editing? My reaper.conf file looks like this:
Your reaper.conf should look like: kernel reaper.cl
save_binaries yes
enable_graceful_shutdown no
long_polling yes
mine litecoin your litecoin.conf should look like: worksize 256
vectors 1
aggression 20
threads_per_gpu 1
sharethreads 32
lookup_gap 2
gpu_thread_concurrency 24576 |
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This has been happening to me since the dawn on GPU mining LTC on pools. Not sure what causes it.
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The memory bus is the same size for the 7970, so use threads = 1 and thread concurrency = 384 * 64 = 24576, aggression 20. Words like "personally" mean that's what I got, and that your mileage may vary. You can get 700kh/s on a 7950 though, so I'm not sure why anyone would think getting that much from a 7970 would be difficult. |
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I would buy 7970s if I were to buy more cards, although the efficiencies of the 7950s isn't that bad. You can probably resell 7970s for 80% of their purchase value or so before the 8xxx series comes out Q1 next year, especially if LTC mining is popular then. This is in contrast to the 6xxx series which will probably lose way more of its value as they can only be used for mining by then, as comparatively their gaming performance will probably be poor.
I think those numbers are higher than most people report too, but I know what my rig pulls idle with no cards in it (70W) whereas most people measure power consumption as the difference from idle to load (which is incorrect and will give you lower than actual).
The temperature where I live goes down to an average of -20C in the winter time, so come November my rigs (outdoor in a shed) should be sufficiently cooled to pull excellent efficiency. The cards will have to probably mine at 800MHz in the summertime if I keep them that long, because the heat gets to be a bit much.
Currently the 7970s are pretty profitable to mine BTC with (I make $7 a day on a $1400 investment). If the rigs continue to pull LTC after BTC at a similar rate or the price of either grows exponentially (since I hoard), I should still have made money in 6 months time. You need to weigh it for yourself though, it is a gamble.
You can also try gambling with the LTC market by dumping about $10k into it progressively over a month and trying to get it to snowball upwards, but I think that's even more of a gamble.
You can probably rest assured that if all the GPU miners do move to LTC though, the LTC you save now will be worth a lot in the near future.
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change thread_per_gpu to 1
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Stock 7970 gets about 650-700 kh/s and will use an estimated 230 w of power (256 w from the wal at 90% efficiency). I know this from personal experience. A 6950 will pull roughly about 200 w (222 w at the wall; these are estimated, but mrtlt used 6950s when he mined and the power clocked in at roughly these amounts) and get 450 kh/s.
My 7950s also get 550 kh/s at 227w at the wall.
Okay:
7970: 2.64 kh/s/w
7950: 2.42 kh/s/w
6950: 2.02 kh/s/w
Thus the 7970 mines at 77% of the power of the 6950, with the 7950 tailing it.
Additionally the kernels totally suck balls right now for GCN, so this may improve over time.
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Except I'll be the one laughing when my ASIC farm makes more money in 5 days than you've made in 5 month.  You won't make much of anything if everyone else with an ASIC also decides to dump. ...except for maybe a good price for me to buy at. |
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Interesting. I'm getting the same error in Reaper as well when I go above 8192.
Your thread concurrency needs to be a multiple of 64, but otherwise any thread_concurrency within the memory size should work. |
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it's the same graph, there's just four times as many ltc in circulation at the end of it (just change the scale so that it's 84 million at highest). also it starts in 2011.
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in what O/C ? if you'r doing that
also, you don't need -w and -v
1GHz core / 1450mhz RAM if i don't set flags i lose performance cgminer is setting the thread concurrency with --shader to ~8192, which is too small. cgminer has a bug where it can't use thread concurrencies over 8192 (gives a memory size error). in order to achieve max hashing rates for a 7xxx series card you need to set the concurrency to 64 * (memory bus size in bits). in the meantime i'm getting 550kh/s in reaper and finding blocks |
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Just found two blocks in the span of an hour, right on C:
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cgminer is the best, and can give more then reaper, its have been proven  Just need to configure right using -shaders i get 550kh/s and 99% hardware errors what card?, and what --shader are you using?, and what else? 7950, --shader 1792 -w 256 -v 1 -g 1 |
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cgminer is the best, and can give more then reaper, its have been proven Just need to configure right using -shaders i get 550kh/s and 99% hardware errors |
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OP: 17 MH/s is A LOT - care to share your seekrit?
Canada has a lot of space with big houses and a climate illness called winter half of the year. The rigs were bought for making money AND heating my house  I have my miner out in a shed in Alberta. I've already seen my cards mine in the mid 40s, I expect when it gets really cold here I will see temps below 0C. |
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Reaper v13 Beta 4? Can I have gpu_thread_concurrency for one card?
That's correct, and the above config has it, 24576. The other important thing to note is threads_per_gpu = 1 (7xxx series require this flag) |
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Yeah, sure. This is my reaper config: host ltcmine.ru
port 8344
user xxx
pass xxx
protocol litecoin
worksize 256
vectors 1
aggression 20
threads_per_gpu 1
sharethreads 32
lookup_gap 2
gpu_thread_concurrency 24576 Wattage is coming from the wall (AC power) from a Blue Planet electronic energy meter. Rig idle without GPU is 70w, rig with 2 cards in mining BTC is 400W, rig with 3 cards in mining LTC is 750w. |
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So, mining BTC at 520 MH/s on a 7950, I use 165 w/hr for every card I have (1.03v / 1 Ghz core / 300 MHz RAM).
Mining LTC at 550 kh/s on the same card, I use 227 w/hr for every card I have (1.03v / 1 Ghz core / 1450 MHz RAM).
So, presently, it's cheaper for me to just mine btc and use that to buy LTC. LTC also heats my cards by at worst an extra 14C.
Are all the AMD cards like this? Is the 6xxx series more efficient?
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