Is liquid cooling worth it | Bitcointalksearch.org

leetmodz

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Quote from: janpec1000 on January 28, 2014, 09:11:45 AM

leetmodz Actually it does work on 1 card, performace is quite bad but it works on single card. Once i go to two it hangs. Do you think its becouse of PSU? I really dont think it is becouse many people are mining with 2 r9 290x on 850W PSU (gold) at high intensity 900Khahs settings.

I am still very much puzzled i have tried many different pools tried everything that is based in EU only and i still get bad reports on Khahs. Could it be internet signal? At moment i am having 3 of 5 in quallity of wireless. I really dont know what else could be.

did you try both cards separately? maybe one just can't handle the config. also try upping the voltage a little bit on the one card and see if the perf goes up (stability reasons).

oh, and are you talking about pool kh/s or what is displayed on the terminal? if you making anywhere near what similar miners are making, I would just ignore it(click the "pool" button on the pool website and look for similar kh/s).

edit: ping test the pools and post what numbers you get.

janpec1000

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leetmodz Actually it does work on 1 card, performace is quite bad but it works on single card. Once i go to two it hangs. Do you think its becouse of PSU? I really dont think it is becouse many people are mining with 2 r9 290x on 850W PSU (gold) at high intensity 900Khahs settings.

I am still very much puzzled i have tried many different pools tried everything that is based in EU only and i still get bad reports on Khahs. Could it be internet signal? At moment i am having 3 of 5 in quallity of wireless. I really dont know what else could be.

TookDk

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Quote from: Digi7ech on January 25, 2014, 11:50:23 PM

Liquid cooling is worth it for GPU longevity.

Heat is a killer and my liquid cooling setup runs 15-20*C cooler than air fans.

I have 2x 7950's that use non-standard PCB's that are air cooled.
They run in my open rig at 64-70*C

The 2x 7950's that are using EK waterblocks with a 4x120mm radiator and 4x fans runs at 48*c all day in my house that swings from 71-80*F.

It's expensive though. My watercooling setup alone is at least $500-600. (radiator, Resevoir+pump, flow meter, tubing, fittings, GPU waterblocks)

Love it! <3

Im sure your wife approves

Digi7ech

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HBN <3

Liquid cooling is worth it for GPU longevity.

Heat is a killer and my liquid cooling setup runs 15-20*C cooler than air fans.

I have 2x 7950's that use non-standard PCB's that are air cooled.
They run in my open rig at 64-70*C

The 2x 7950's that are using EK waterblocks with a 4x120mm radiator and 4x fans runs at 48*c all day in my house that swings from 71-80*F.

It's expensive though. My watercooling setup alone is at least $500-600. (radiator, Resevoir+pump, flow meter, tubing, fittings, GPU waterblocks)

leetmodz

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Quote from: janpec1000 on January 25, 2014, 04:42:09 PM

Thanks for help, those are all 20 intensity setups though, i will try on 15 probably wont get close to that hash rate.

Are you only trying with both cards at the same time? maybe it's screwing up on 20 intensity because the psu can't provide enough power for both cards. Try mining with that config on one card, and see what happens.

Just spitballing.

janpec1000

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Thanks for help, those are all 20 intensity setups though, i will try on 15 probably wont get close to that hash rate.

TookDk

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Quote from: leetmodz on January 25, 2014, 01:30:21 PM

Quote from: janpec1000 on January 25, 2014, 07:39:32 AM

Alright, well my pool hash rate got better now, close to about 60% of actual hash rate.

I have further problem which is my actual hash rate, i am can run 600khahs and max intensity 15. If i get intensity 20 on both GPUs computer freezes.
Also very wierd it is if i use settings that are suppose to be best for r9 290x (--thread-concurrency 32784 -i 20 -w 512) i get only 80Khahs??? I have AMD catalyst 13.11 beta 9, should i get never drivers even that those are reported to be the best for r9 290x?

Dunno if it will help, but these are some epic configs: http://rumorscity.com/2013/12/03/litecoin-gpu-mining-with-amd-r9-290-and-r9-290x-sweet-spot-for-1000khashsec/

Justin Soo who wrote the article are awesome - I used to guide to undervolt my MSI R9 280X, Justin is pretty helpful if you post on the page.
Highly recommended.

leetmodz

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Quote from: janpec1000 on January 25, 2014, 07:39:32 AM

Alright, well my pool hash rate got better now, close to about 60% of actual hash rate.

I have further problem which is my actual hash rate, i am can run 600khahs and max intensity 15. If i get intensity 20 on both GPUs computer freezes.
Also very wierd it is if i use settings that are suppose to be best for r9 290x (--thread-concurrency 32784 -i 20 -w 512) i get only 80Khahs??? I have AMD catalyst 13.11 beta 9, should i get never drivers even that those are reported to be the best for r9 290x?

Dunno if it will help, but these are some epic configs: http://rumorscity.com/2013/12/03/litecoin-gpu-mining-with-amd-r9-290-and-r9-290x-sweet-spot-for-1000khashsec/

janpec1000

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Alright, well my pool hash rate got better now, close to about 60% of actual hash rate.

I have further problem which is my actual hash rate, i am can run 600khahs and max intensity 15. If i get intensity 20 on both GPUs computer freezes.
Also very wierd it is if i use settings that are suppose to be best for r9 290x (--thread-concurrency 32784 -i 20 -w 512) i get only 80Khahs??? I have AMD catalyst 13.11 beta 9, should i get never drivers even that those are reported to be the best for r9 290x?

TookDk

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Quote from: janpec1000 on January 25, 2014, 07:23:05 AM

Guys does anyone has aprox number how many shares should i get on 500Khahs speed in lets say 1 hour, or maybe 1 day?

That is impossible to say, depend on the difficulty, Which for some coins change a lot.
It also depend on the pool, and pure luck.

Its much better to estimate on basis of coins per day:

http://www.coinwarz.com/cryptocurrency

Its ok to have 0-3% invalid/reject/stale shares, if you have more then look at your setting or pool connections. HW errors is imo not acceptable in any case (unless you know what you are doing).

janpec1000

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Guys does anyone has aprox number how many shares should i get on 500Khahs speed in lets say 1 hour, or maybe 1 day?

janpec1000

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Ok tried with cgminer now, tried different pool, 0 Hardware errors.

However on pool website it says 377 valid shares and 27 invalid shares. Is that high ratio of invalid shares. CGminer says 0 HW i dont get it .
Cgminer says hashing at moment with 400khahs, pool says 140khash. Please guys i need your help i dont want to spend 100 eur on electric bill just to found i mined single LTC.

janpec1000

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Yes all pools report same problem, 10%-20% of my actual GUIMiner hash rate.

Could it be drivers? Could it be that internet signal wireless is only 4 of 5 in quality and not 5 of 5?

GUI miner reports no rejected shares. I have not yet had chance to do mining with cgminer to check HW.

TookDk

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Quote from: janpec1000 on January 24, 2014, 05:59:41 PM

Thank you guys for all help here, i have solved now all problems except 1:
Hash rate reported on pool is much lower than what is on my GUIminer. GUIminer says 700khahs per card, coinotron pool says 100Khahs. I have tried changing settings all arround with no much luck.

Have you checked in your cgminer stats if you have many reject or HW errors?

The pool hashrate is only based on valid shares.

kalus

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Quote from: janpec1000 on January 24, 2014, 05:59:41 PM

Hash rate reported on pool is much lower than what is on my GUIminer. GUIminer says 700khahs per card, coinotron pool says 100Khahs. I have tried changing settings all arround with no much luck.

have you tried other pools? and do you have the same issue with accepted hash rates?

kalus

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Quote from: janpec1000 on January 24, 2014, 07:21:51 AM

Spiffy ok so you can confirm that water cooling is nearly silent?

Kalus does watercooling "fridge" spend so much electricity? What is its power in W of some default water cooler? Also does anyone has aprox estimate how much does it cost full water cooling setup for 2 cards?

a refrigerator will add to the cost by $100, but you need to have 3x or 4x the loop volume in the refrigerator, or else you'll overwhelm the refrigerator with the heat being generated. a fridge compressor isn't designed to run 24/7; it has an on-off duty cycle. make sure there is a lot of reservoir water in the fridge.

There was a project i read some time ago that utilized a water cooling system and a pump to supply the underfloor heating of a bathroom. the builder remarked his family had actually asked him to build another mining rig to warm a second bathroom up, and this was the first time his wife was supportive of his mining hobby!

Your original goal was to make a quiet, desktop system. if you add a fridge to the room, you will be adding the compressor noise of the fridge.

janpec1000

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Thank you guys for all help here, i have solved now all problems except 1:
Hash rate reported on pool is much lower than what is on my GUIminer. GUIminer says 700khahs per card, coinotron pool says 100Khahs. I have tried changing settings all arround with no much luck.

TookDk

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Yeah, you can make two workers

just call cgminer two times using the -d switch:

cgminer.exe -c configfile0.conf -d 0
cgminer.exe -c configfile1.conf -d 1

Then is GPU 0 "OFF" in the first process, and GPU 1 is "OFF" in the other process.
This can be useful if you want separate worker for each card.

leetmodz

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Quote from: janpec1000 on January 24, 2014, 01:12:50 PM

Thank you guys very much for help so far. I have opened case, purchased table fan and its blowing right onto card. Temperatures on 50% GPU fan are now 75 degrees.

I dont want to open new topic so i am gona ask here do i need to create two workers if i am using two GPUs each with its own GUIMiner instance runing? Becouse now it looks like that on Litecoin pool all i am getting is read in KHahs only from 1 card, so i am guessing i need two workers.

Also do you guys think its ok to run 2 r9 290x GPUs at max + CPU I3 4130 (all three of them mining)? I am on 850W PSU.

I'm glad you got the temp problem fixed! As for the workers, I am not sure.

To your last Q, it depends if guiminer is already combining some of the cpu power like Cudaminer does on Nvidia cards. On Cudaminer, if you run a cpuminer as well, the gpu kh/s goes down more then cpu mining adds. You will have to test it and see. 850w gold, silver or bronze? I say gold and silver rating would probably be ok for that setup.

janpec1000

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Thank you guys very much for help so far. I have opened case, purchased table fan and its blowing right onto card. Temperatures on 50% GPU fan are now 75 degrees.

I dont want to open new topic so i am gona ask here do i need to create two workers if i am using two GPUs each with its own GUIMiner instance runing? Becouse now it looks like that on Litecoin pool all i am getting is read in KHahs only from 1 card, so i am guessing i need two workers.

Also do you guys think its ok to run 2 r9 290x GPUs at max + CPU I3 4130 (all three of them mining)? I am on 850W PSU.

Topic: Is liquid cooling worth it (Read 1992 times)