Topic: Fourth alt coin thread last three got oversized. - page 21. (Read 108938 times)

What is the reason when we mine skein and sometime zec that we drop the memory clock to -500?  Is this just to reduce stress on the card?   As I can't seem to see any performance or power difference.

Run one card doing Lyra2. See what it does.

Run the other card . See what it does .

Some cards will run well with others some do  not.

Try just one card in two slots.

Try the other card in two slots.

Which means four runs.

Then try the two together. Then flip the two.

You may find the cards are not the issue the mobo may provide more reserves to one slot over the other.

Or you got a weak card.

Some say weak cards will do better on under clock.

So test at 50 % and 55%

One may really improve on a low clock

You won't like this, but all chips are different. You may have FFF (fast silicon) and SSS (slow) silicon.  GPUz has a way to measure ASIC quality. https://youtu.be/I3DyiLAQ3Qk

Sounds like you have a good one, and a bad one.  Search these forums for silicon lottery

Gigabyte GTX1080ti Founders Edition VS EVGA GTX1080ti FE

Any opinions.  I already own 2x the EVGA ones and nothing good or bad about them.

I noticed one of my gpus was going 54mhs and my second was doing 65mhs on lyra2.

So I was like I guess I have to tweak that one.. I seperated them on afterburn and I started tweaking.. no mater what I do.. 60%, 100% power.. overclock.. no oc.. the cars has no change.

The other card changes its mhs when I made adjustments.. I dont get it.. anyone know what I am doing wrong?

me being in florida i had to do the same today my rate is always 13cents but the heat is killing me and the cards. ((wife isnt happy either))
i cut down on the mining by a lot running the 20 amd cards i have at 960core/1800mem
cut the power down by 4.3amps=1000watts losing about 20$ a day by doing this but it must be done room temp came down
it was sitting in the 95-100 range now its 80-85 range

when October comes its game on again!!

so :
60 to 65 = 70 watts  more and you get 158 mh extra
65 to 70 = 70 watts  more and you get 112 mh extra
70 to 75 = 70 watts  more and you get 120 mh extra
75 to 80 = 75 watts more and you  get 100 mh extra
80 to 85 = 70 watts more and you  get   93 mh extra


and I know that

85 to 90
90 to 95
95 to 100   are all worse then  80 to 85

ie the real cliff  of waste  is at 85 to 100

If it were colder I would run 80%

but I have no cooling in the garage  none nada zip  I have not been able to run with summer power cost since 2013  so I never bothered to make the garage have good cooling.

I am running in the 60%  area  for now and in the fall I will clock higher.

also remember  my summer power is 16.7 + say 2.3 for ac costs.  so 19 cents

my winter power is 12.7 - say 3 cents for free heat so  9.7 cents.

so OCT 1 my power bill is dropped 45- 50%  until June 1 next year.

Here are some wattmeter readings from my 5x 1080ti Rig.


All 1080tis are founder edition.

+250 core -502 mem
50% pow limit   700W   3885mh/s
55% pow limit   766W   4086mh/s
60% pow limit   840W   4250mh/s
65% pow limit   910W   4408mh/s
70% pow limit   980W   4520mh/s
75% pow limit   1050W   4640mh/s
80% pow limit   1125W   4740mh/s
85% pow limit   1195W   4833mh/s


Specs:

Biostar TB250 BTC
Pentium G4560
4Gb ram
60gb ssd
Evga 1200P2 power supply

240V line.

I run at 80%. Prefer less potential problems than making a couple more dollars. These cards will be running 24/7 for 2-3 years.

They have been posted in this thread within the last 20 pages, you have to go digging and you can get confused pretty easily.  But here is what I have found.

1080ti Auros
Efficient 60-80% TPD
+50-70 Core for Zec Skein +0 for Eth
Mem Clock+0 for Zec (some say -xxx but I have found I get 40 more sitting on zero) (-xxx for Skein but again I found 0 works good also) +750 for Eth (this is pushing it so be careful)
Fan whatever keeps it under 60-65C

EVGA 1080ti FE and Evga 1080 FE
Efficent 60-80%
+200 core zec and skein.  untested ETH (you might be able to push it more)
+0 mem.    (again others say -xxx but honestly I am getting gains by having it at zero on zec.)

Standard USA electric coming into residential housing is 240 vac single phase. Which is 2x 120 vac power lines and 1x common. In the panel the 120 lines feed one buss each so the 240 breakers feed off both busses and the 120 breakers feed off one or the other.

I think these last two posts have been the most helpful I have read in a few days (no offense to other posts).

Back when I mined 3 years ago I never pleased with power level and was burning electricity like no buddies business.
I did used to edit the bat file to tune the gpu directly and avoided using afterburn.

Tweaking the bat required an exe file reboot which is why I asked it afterburn was instant earlier.

I've been mining for less than 24hours and I am getting really interested/exciting in all the tweaking that can be done.
I am surprised that so few talk about it here. Wishing more people would post the sweet post on their cards for what they are mining (even though each is different)

I fully agree with this.

You need to check the calculators.  2 weeks ago on Skein I was running 100% TPD because the price was so good that the extra power usage was no big deal I was making an extra $2 per day compared to 60 or 70 TPD.  Because I only have 4 cards spread in 2 rigs Heat is not really a big issue for me like someone like Phil.  It is also Winter so I was able to do 100% TDP and still have my fan at 60%.

Fast forward to today.  I get around about the same money at 65% as I do at 90% and actually start losing money at 100% so while it doesn't matter which setting I put it on I'd rather save the power and reduce stress on the card.  Others might prefer the extra coins as they can then turn those coins into more money via trading or market gains on those coins.  It's really upto you but you must do the calcuations on whattomine with accurate power readings at the wall.

Just to throw more into the fire on the high tdp to low tdp mining....

You really need to buy a watt meter to see the FULL draw of the system and you need to understand your specific gpu very well, every gpu acts differently...


I am onboard with the low wattage, high ratio of hashpower per watt numbers, this is the standard i have been adjusting to and i have just recently taken it to even more levels of adjusting after learning some of the coding of the ccminers i use....

It all starts at your PSU, they are rated at X watts @ x% at multiple levels... I found initially that my first 4 card gtx1080ti was pulling like 91 watts more than my 2nd 4 card gtx1080ti rig, with both being identical rigs... made no sense.. settings were the same.. but what i did have a change at was i was powering the 4 cards on the first rig with a 850watt corsair gold rated PSU and the 2nd one was using my 1300watt evga plat rated PSU... i unplugged the corsair and swapped the PSU with a 1200watt evga plat rated psu i had for another rig and the power consumption while mining drop 87watts right off the start with the different PSU....

The second part of the PSU is the ratings @ different % of use... some psu's when you look into them are rated at like 80-83% @ 50% draw, but they get stupid low at like 80%.... my corsair psu rating online at 80% was something stupid like 68% which is just terrible...  so running a plat+ rated PSU will increase your profits from the start...

Then you run into thermal/power throttling of GPU's, after reading in ccminer about the coding and such, i found in regards to ccminer's in general.. not sure if this is true among other miners, but in ccminer when you get the hashpower reports every so many seconds, that is actually the PEAK number being reported out of 30 (default) samples over x seconds... not the average... so it may look like your hashing higher than you truly are.... if you go into the batch and lower the sample rate and increase the reporting rate, you will find that your gpu is not hashing at the previous rate on a consistent rate, because your gpu bounces in and out of thermal throttle/power throttle multiple times a second as it trying to maintain power and temps to the levels you set them in your OC software. so by default the split seconds that your gpu is pausing thermal/power throttling, the ccminer is picking up those spikes in hashrates and reporting it as the peak number during that reporting period... a simple way to see if your throttling is using gpu-z, under monitor if your GPU is giving you ALL the hashing it can at the levels you have it set at, it will say pause under throttling, meaning the core and memory are able to perform mining at PEAK power based on the tdp and OC settings you have it set at....

So a good way to tune GPU's is to under power them so you stay out of these throttling events as much as possible... if you look in msi afterburner on the left side there is a white value and a red value above the frequency your gpu is currently reporting its running at. Those are the base and max limits your GPU can perform work at based on the settings you have it currently selected at. If your reported freq is not within a few of the max red numbers, then you are litterally pushing your GPU to work under its capabilities bouncing in and out of throttling... cryptomining blog has a writeup on this stuff, they took a system that was reporting at 80% tdp and an identical rig tuned down into the 60%ish range... even tho the one reporting 80% tdp was saying it was hashing 13% more per second, when they ran the 2 rigs for 24hrs, the difference between the 2 wallets was less than 1% in earnings... nearly within a margin of error range... yet the one at 80% used nearly 40% more power consumed at the wall...

These are mostly Nvidia pascal commands only

If your ccminer your using supports the same codes as mine, you can use the following code in a batch file to see your actual performance also....

One of the ways you can tune your GPU's is via the miner directly instead of using msi afterburner... i am wanting to switch to this method very soon as its extremely beneficial if you mine a multi-algo setup, you can tune your gpu's to run at the most efficient settings for that miner/algo combo, then you can set it into the code of the batch on each algo as a change of settings BEFORE starting mining, so it will always be running at its best settings when it switches algo's...

this line triggers a command to your gpu to set MAX memory clock on your GPU to 3505, just as if you were changing it in msi afterburner and clicked accept...

this line triggers a command to your pgu to set MAX core clock on your GPU to 1150, these numbers are just random for example

this line triggers a command to your gpu to set TDP to 100w max, so the miner will mine at 100w or less, it will vary as throttling happens....

this line triggers a sensory sampling, if the gpu hits 80c, the miner will skip the next blocks of data tell the gpu temps drop back down in which you can set a resume code to retrigger the mining again at a different temp....

I especially love it when I'm doing it to rigs in a location I know I shouldn't be fiddling with the settings and the machine goes down... it's like... yeah... you knew better... and you still did it... good job man, good job. there's goes $2.25 an hour till you get your butt over there lol

Got to love that .

yup just hit "apply" then either watch the hashrate change, or your computer screen go blank  as the card crashes

it's instant, you can keep your miner open. Just click the tick to apply your new setting and you should see a change in your hashrate etc.

If I make a change in Afterburn is it instant or do I need to reboot my miner .exe for it to take affect.
Trying to figure out the best way to tune the cards..

The Zotac Minis 1070 can squeeze 450sols but I will be happy if I can fine-tune it to around 400sols @ 80watts each

I'm not limited in space, I am limited in the amount of power I can use.

From my previous example, If my max is 4000w...I want to be hashing at 24000MH not 18000MH.
I do not care about the initial cost of cards.


@Citronick..Great info. BTW...I've got 10 x 1070 cards (2 rigs) currently pulling 1350w at the wall on ZEC. I haven't played with the clocks yet so can probably get it more efficient.