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Where's the link to your tutorial? I can try it out and get back to you tonight.
this is what i was referring to |
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Hey all, I have been trying to follow these instructions for overclocking, where you find your max thread concurrency, then max memory clock, then tweak the engine clock. Thing is that the setting you give to cgminer for the engine clock does not get accepted by the GPU. For example, I have set here gpu-engine as 1000 but cgminmer reports it as being 925. GPU 0: 771.3 / 775.5 Kh/s | A:19 R:1 HW:0 U:7.07/m I:20
71.0 C F: 71% (3971 RPM) E: 925 MHz M: 1500 Mhz V: 0.000V A: 100% P: 0% Anyone else see this? |
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I was just reading the SCRYPT-README, it mentions about RAM: If you have less system ram than your GPU has, it may not be possible
to mine at any reasonable rate. Now I just stuck the minimal cheapest 2GB RAM in my system, and the ASUS R9 290 has 4GB of RAM. Is this something I should look at? |
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You will also want to tune your card's core clock (and possibly the memory as well, although my experience with GPU memory is that the R9 series likes it's default mem clock.
My R9 280x has a default core clock of 1000MHz, but it runs best at 995 (a difference of about 60-100 kh/s, so the adjustment isn't trivial. Don't just look at over-clocking. Under-clocking may be better.
is the core clock the gpu-engine setting? |
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Oh, forgot to mention, I am NOT using a dummy plug. As these cards don't have a VGA output.
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Thanks, I will have a look at that file. I was also reading this: http://forum.litebonk.com/index.php?topic=275.0Which seems to suggest that you just leave everything at default (including thread concurrency) and then gradually increase gpu-memclock until you find the best value, and then tweak gpu-engine and then ramp the intensity up. I have been running overnight for the first time, and the room that usual holds around 14°C (winter and summer) is not at all 14°C any more! Maybe I should get a thermometer to hang on the wall. The card seems to be holding the speed and temperature that I posted yesterday. So I guess that's stable and there should be room for me to tweak it. I should also get one of those power meters to see how much I am pulling, but with just one R9 290 and the cheapest AMD board/cpu and a Seasonic Platinum 1000W PSU I'm guessing around 300W? |
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Thanks for all the responses  I have been reading all about scrypt coin mining and decided to give it a go. I built a little system based on various recommendations, with room to add more graphics cards. I am using multipool.us at the moment and the estimated balance in BTC is a healthy profit over energy costs and hopefully I can pay for the hardware in 1-2 months. But I guess there is more/less profit to be made if you are good or not at trading the scrypt coins for bitcoins and then for local currency at the right moments. To give a rough estimate I spent about the cost of 1BTC on hardware last week and have been running just less than 24 hours and have a balance of just over 0.01BTC at multipool.us. |
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Hi, This is a new thing for me, just got setup this week. I wonder if you could take a look at my output and comment? cgminer version 3.7.2 - Started: [2013-12-10 16:32:18]
--------------------------------------------------------------------------------
(5s):874.5K (avg):874.7Kh/s | A:8384 R:320 HW:0 WU:754.7/m
ST: 2 SS: 0 NB: 21 LW: 107 GF: 0 RF: 0
Connected to pool1.eu.multipool.us diff 64 with stratum as user XXXX
Block: e352f665... Diff:49 Started: [16:42:41] Best share: 4.99K
--------------------------------------------------------------------------------
[P]ool management [G]PU management [S]ettings [D]isplay options [Q]uit
GPU 0: 74.0C 3902RPM | 874.3K/874.7Kh/s | A:8384 R:320 HW:0 WU: 754.7/m I:20
--------------------------------------------------------------------------------
[2013-12-10 16:41:32] Pool 0 stale share detected, submitting as user requested
[2013-12-10 16:41:32] Rejected 03010224 Diff 85/64 GPU 0 pool 0 (STALE SHARE (Previous Job '1
[2013-12-10 16:41:33] Accepted 3a8e1c67 Diff 1.12K/64 GPU 0 pool 0
[2013-12-10 16:41:36] Accepted 01c65d6b Diff 144/64 GPU 0 pool 0
[2013-12-10 16:41:39] Stratum from pool 0 detected new block
[2013-12-10 16:41:39] Rejected 026452f1 Diff 107/64 GPU 0 pool 0 (STALE SHARE (Previous Job '1
[2013-12-10 16:41:39] Rejected 0336b622 Diff 80/64 GPU 0 pool 0 (STALE SHARE (Previous Job '1
[2013-12-10 16:41:42] Accepted 02443b4e Diff 113/64 GPU 0 pool 0
[2013-12-10 16:41:46] Accepted 03d70160 Diff 67/64 GPU 0 pool 0
[2013-12-10 16:41:47] Stratum from pool 0 detected new block
[2013-12-10 16:41:51] Accepted 03abcf07 Diff 70/64 GPU 0 pool 0
[2013-12-10 16:41:51] Accepted 0332c62a Diff 80/64 GPU 0 pool 0
[2013-12-10 16:42:02] Accepted 0146c5a3 Diff 201/64 GPU 0 pool 0
[2013-12-10 16:42:06] Stratum from pool 0 detected new block
[2013-12-10 16:42:11] Stratum from pool 0 detected new block
[2013-12-10 16:42:23] Accepted 02b6970e Diff 94/64 GPU 0 pool 0
[2013-12-10 16:42:24] Accepted 015e93ea Diff 187/64 GPU 0 pool 0
[2013-12-10 16:42:24] Accepted 023b270e Diff 115/64 GPU 0 pool 0
[2013-12-10 16:42:24] Accepted 025fe7a5 Diff 108/64 GPU 0 pool 0
[2013-12-10 16:42:41] Stratum from pool 0 detected new block
[2013-12-10 16:42:48] Accepted 4e4a2e69 Diff 837/64 GPU 0 pool 0
[2013-12-10 16:42:54] Accepted 03259db2 Diff 81/64 GPU 0 pool 0
[2013-12-10 16:42:57] Accepted 03810188 Diff 73/64 GPU 0 pool 0
I had lots of help from all the websites and forums, especially here: http://www.cryptobadger.com/2013/04/build-a-litecoin-mining-rig-linux/http://www.coinminingrigs.comI am currently running a single Asus R9 290. I have a startup script which looks like this: #!/bin/sh
export DISPLAY=:0
export GPU_MAX_ALLOC_PERCENT=100
export GPU_USE_SYNC_OBJECTS=1
cd /home/XXXX/cgminer-3.7.2-x86_64-built
./cgminer -c cgminer.conf
And this is the contents of cgminer.conf: {
"pools" : [
{
"url" : "stratum+tcp://pool1.eu.multipool.us:7777",
"user" : "XXXX",
"pass" : "XXXX"
},
{
"url" : "stratum+tcp://pool1.us.multipool.us:7777",
"user" : "XXXX",
"pass" : "XXXX"
}
],
"scrypt" : true,
"gpu-threads" : "1",
"worksize" : "512",
"lookup-gap" : "2",
"thread-concurrency" : "24550",
"intensity" : "20",
"gpu-fan" : "70",
"gpu-engine" : "1000",
"gpu-memclock" : "1500",
"gpu-powertune" : "20"
}I understood that this card could push to around 900 KH/s, so I'm close, but not quite there. Is there anything to look at to maybe increase the speed some more? The first thing I noticed is that the fan is way louder than I expected! Now I have set it up in the basement which holds an ambient temperature of around 14 °C. What is an acceptable temperature and RPM for the GPU to hold at for long periods? Any input would be great, thanks. |
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no prob, is back up now |
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Is there another way I can download cgminer-3.7.2-x86_64-built.tar.bz2 ?
thanks
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Are there any considerations when mixing graphics cards?
I am thinking about buying one or two to start, and adding later. But I do know that graphics cards seem to come and go, so in a couple of months you probably can't buy the same model again.
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Hi, Thanks for all the points. I have been looking at the pages here: http://www.cryptobadger.com/2013/04/build-a-litecoin-mining-rig-hardware/http://www.coinminingrigs.comhttp://dustcoin.com/miningIt seems that mining scrypt based coins at around 2000 kH/s is similar to mining bitcoins at 50-100 GH/s. I thought the value of bitcoins is increasing partly to keep up with the cost of mining hardware. But the scrypt based mining seems much more affordable for a similar income. How is this? It seems that the value of litecoin is linked to bitcoin, how/why? And how are the rates set for all the other coins? How important is the motherboard and CPU for scrypt-coin mining? I already have an i7 based PC that is not used much, but without a good graphics card. Would buying one or two of the graphics cards mentioned (eg the AMD R9 280x) and just hooking them up to my current system be a good way to get going? What considerations are there when choosing motherboard and CPU? Case considerations are of course due to airflow! |
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Hi, I'm new here, but I have been reading a lot and looking at the numbers. It seems that for someone starting out, mining doesn't make any sense? Using this calculator: http://www.alloscomp.com/bitcoin/calculatorGiven the current difficulty and value of a bitcoin, it seems that you need to be mining at minimum 50-100 GH/s NOW in order for it to be worth anything. But in order to be running a rig NOW running at 50-100 GH/s or a mining contract, it just seems so expensive. At around $50-60 per GH/s. Lots of places offering $10 per GH/s, or maybe down to $3 per GH/s. But this is ALL pre-order, nothing that's actually available now. And it seems that at the rate difficulty is increasing, by them time you would receive such hardware or contracts then it would not be worth it, UNLESS the value of the bitcoin increases dramatically. So as far as I can tell, unless you are a manufacturer currently running the new hardware which is available PRE-ORDER, then nobody at home can get started now and make anything? |
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