Tune, tune, and re-tune!!
-
For those just starting out in mining like myself, I can’t emphasis enough the importance of listening to people when they tell you to tune your cards!!!
After just a couple of hours I have managed to tune my 7970 from 564Mh/s up to 718Mh/s ;D
There’s a lot of information out there and your going to need to do a lot of reading, a good place to start is with the SCRYT-README.txt in your cgminer directory, this explains the settings and how to go about tuning in detail. There is a lot of good information [url=https://litecoin.info/Mining_hardware_comparison]here[/url] to give you a starting point to work towards your final config.
So my rig spec:
Motherboard: ASUS M5A78L-M LX3
CPU: AMD Athlon II X2 250
Memory: 4GB DDR 1333Mhz
GPU0: GV-R797TO-3GD
PSU: G7 Power Extreme 880W
OS: [url=https://litecointalk.org/index.php?topic=2924.0]BAMT on a USB[/url]
CGMiner Version: 3.1.0The configs…
I started with this and was getting around 564Kh/s
[code]“auto-fan” : true,
“auto-gpu” : true,
“temp-cutoff” : “84”,
“temp-overheat” : “81”,
“temp-target” : “65”,
“gpu-fan” : “0-100”,
“intensity” : “13”,
“vectors” : “1”,
“worksize” : “256”,
“kernel” : “scrypt”,
“lookup-gap” : “2”,
“thread-concurrency” : “8192”,
“shaders” : “0”,
“api-port” : “4028”,
“expiry” : “120”,
“gpu-dyninterval” : “7”,
“gpu-platform” : “0”,
“gpu-threads” : “2”,
“gpu-engine” : “1040”,
“gpu-memclock” : “1495”,
“gpu-powertune” : “20”,[/code]a quick check at the hardware comparison from above was showing people pulling 760Kh/s off the same card type as the one I’m running and I’m sitting here thinking I want some of that action!
So a little more reading and messing around with settings managed to get me up to around 615Mh/s using the following settings
[code]“auto-fan” : true,
“auto-gpu” : true,
“temp-cutoff” : “84”,
“temp-overheat” : “81”,
“temp-target” : “65”,
“gpu-fan” : “0-100”,
“intensity” : “20”,
“vectors” : “1”,
“worksize” : “256”,
“kernel” : “scrypt”,
“lookup-gap” : “2”,
“thread-concurrency” : “40960”,
“shaders” : “0”,
“api-port” : “4028”,
“expiry” : “120”,
“gpu-dyninterval” : “7”,
“gpu-platform” : “0”,
“gpu-threads” : “1”,
“gpu-engine” : “1075”,
“gpu-memclock” : “1375”,
“gpu-powertune” : “20”,[/code]I got stuck at around this make for ages, didn’t seam to matter what I did all I could do was get +/- 20-30Mh/s out of it, but perseverance has paid off with the below config turning 718Kh/s :P
[code]“auto-fan” : true,
“auto-gpu” : true,
“temp-cutoff” : “84”,
“temp-overheat” : “81”,
“temp-target” : “65”,
“gpu-fan” : “0-100”,
“intensity” : “20”,
“vectors” : “1”,
“worksize” : “256”,
“kernel” : “scrypt”,
“lookup-gap” : “2”,
“thread-concurrency” : “24000”,
“shaders” : “0”,
“api-port” : “4028”,
“expiry” : “120”,
“gpu-dyninterval” : “7”,
“gpu-platform” : “0”,
“gpu-threads” : “1”,
“gpu-engine” : “1085”,
“gpu-memclock” : “1500”,
“gpu-powertune” : “20”,[/code]I got a simple power monitor from [url=http://www.maplin.co.uk/p/five-way-energy-saving-monitor-n35hn]Maplin[/url] for £ 13.50 that shows around 440W at the wall. But at the moment power consumption is not a concern for me, it’s getting cold here in the UK and I work from home, so normally at this time of year the central heating is on, having this running in the office with me has allowed me to turn the central heating off during the day for the last 3 days as it keeps the office at a nice temperature :) Still need to find a way of working out how much a day that is saving me.
I have to say many thank you’s to a lot of people that hang out on here for the endless amounts of information you give away about how to do these things and all of the links you post leading to more information.
UM
-
copying and saving… ;D
is appreciated :)
-
I found at the best config for my 7970 is 1080/1500 (copied one of Nutnut’s cofiguration).
-
Cheers for sharing!
I think this proves that if you really want your miners to perform at a top level you have to put some time into finding the sweet spot for your particular card.
I’m new into mining but I’ve got a long background in overclocking both CPU’s and GFX cards. The most valuable lesson I’ve learned during the years is that [b]no component are alike![/b].
It doesn’t matter if you have the same brand and model as someone else, there’s still no guarantee that it’ll work with identical settings. Trial and error is the only true way to be sure on how your cards will perform :)
-
I must admit that once I had hit the 615Kh/s mark, and everything I seamed to do was making things either much worse or not making any difference I was starting to think that was the best I was going to get. But a little more perseverance has me at steady 718Kh/s
I have noticed that after a while the blowers start to slow down, and the temp stays around the same. So I’m wondering what’s going on there, or is it just as things stabilise a little?
Just had a little problem and had to restart a couple of things here, so can’t tell you what it had got down to but here are the numbers on restart:-
Load: 99%
Fan: 100% (3279)
Temp: 63.0 c
@ the wall: 440WI will leave it all alone for a couple of hours now (I have some work to do for my real job :( ) and then take a few more reading and see if once it has settled again, the power consumption comes down at all.
UM
-
[quote name=“uncle_muddy” post=“42049” timestamp=“1386597640”]
I must admit that once I had hit the 615Kh/s mark, and everything I seamed to do was making things either much worse or not making any difference I was starting to think that was the best I was going to get. But a little more perseverance has me at steady 718Kh/sI have noticed that after a while the blowers start to slow down, and the temp stays around the same. So I’m wondering what’s going on there, or is it just as things stabilise a little?
Just had a little problem and had to restart a couple of things here, so can’t tell you what it had got down to but here are the numbers on restart:-
Load: 99%
Fan: 100% (3279)
Temp: 63.0 c
@ the wall: 440WI will leave it all alone for a couple of hours now (I have some work to do for my real job :( ) and then take a few more reading and see if once it has settled again, the power consumption comes down at all.
UM
[/quote]My fans do the same thing, slow, it gets hot, fan power up high, then it balances out and keep the temp pretty stable.
I’m also from the UK, but currently in California, it’s a little “cold” here for my American wife, so we’re appreciating the extra heat lol.
Cheers for sharing your info, I have 2x 7950, and tweaking makes a big diff for sure. I’ve got mine up to 660kh/s each right now. Hoping to get up to 700kh/s after a bit more tweaking, but like yourself, I better do some real work haha.
-
Can you copy and paste your cgminer window? I have to see it to believe your are at -I 20 without any HW errors
-
I didn’t say no hardware errors, but then I don’t know how to check…
But heres a couple of screen grabs for you to take a look at, if you can let me know where I would see hardware errors that would be grand :)
[attachment deleted by admin]
-
Let it run for a while. you see the HW on those pictures you sent me? The HW: 0 part… if the 0 goes up thats a hardware error. Normally 7970s cannot go beyond -I 13 without getting tons of these.
-
OK, thanks for the explanation. do these numbers get reset every time I disconnect from the screen and then resume it?
-
no it shouldnt. Whats your hashrate reading on the pool’s website? is it relatively close to your actual hashrate? if its drastically lower thats also a sign.
-
[quote name=“uncle_muddy” post=“42023” timestamp=“1386592108”]
“intensity” : “20”
[/quote]Weeeee! Good luck.
-
Hash rate on the pool is pretty close to the rate reported in cgminer 8hrs mining and no HW errors reported yet!
[quote name=“Tuck Fheman” post=“42232” timestamp=“1386626386”]
[quote author=uncle_muddy link=topic=5720.msg42023#msg42023 date=1386592108]
“intensity” : “20”
[/quote]Weeeee! Good luck.
[/quote]Is that a good luck as in I’ll be lucky to get away without HW errors for long or as in I’ll be lucky not to blow something up?
-
[quote name=“uncle_muddy” post=“42259” timestamp=“1386629105”]
Is that a good luck as in I’ll be lucky to get away without HW errors for long or as in I’ll be lucky not to blow something up?
[/quote]Both. ;)
-
I have just put mine back to default settings on clock and men speed as last week a big spark flew out of one of the power connectors going to a card!
Left the card off for a day or 2 but then popped it back and been running a week with no problems. At standard settings i get 595 khash/s
I use GUi miner with GPU 7950 high settings but tone down the intensity to 19 on two cards and 18 on the other as this one gets extra hot for some reason.
Its stable so leave it there, never tried the other mining software as is command driven and not had chance to get head around it…?
7950’s 1.8 Mhash/s and stable so happy with that
-
i never run -I 20 but -I 19 is normal on many 7950s.
-
OK so a few more numbers from this morning to see how she’s holding up…
No hardware errors reported after running for 8Hrs
Load: 99%
Fan: 67% (2968)
Temp: 63.0 c
@ the wall: 430WBut I will admit, I have just had to do a bit of sorting out in the office as SWMBO is turning up later, and as part of this I have disabled everything not being used in the BIOS and removed the HDD that was connected as I’m running of a USB stick so that might be the 10W difference.
[quote name=“angloblaxon” post=“42337” timestamp=“1386644346”]
i never run -I 20 but -I 19 is normal on many 7950s.
[/quote]I’m beginning to feel that you guys are trying to tell me something here and maybe I should drop down to I=19 and lose the extra 16Kh/s the I=20 is giving me to prolong the life of the setup.
UM