Rig stats and pics
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[quote name=“svennand” post=“6385” timestamp=“1369501923”]
[quote author=pyxis link=topic=264.msg6343#msg6343 date=1369487867]
A bathroom fan on the door, I must get around to doing that. ;)
[/quote]Had a problem with room temp during this summer. Was about 35 degrees in the shed
Had circulation problem.
Now i have 2x420mm fans blowing from the back of the rig and towards the door.
And a 420mm in the middle of the room to push the air further.
After installing that bathroom fan i now have outside temp (10-20degrees) in thr room:)
[/quote]Summer is just starting here and that will be a problem, as I only starting mining during winter a few months ago, I never had any cooling problems until recently, (its been a hot week). Cheers for the tips.
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[img]http://i.imgur.com/UoAMolK.jpg[/img]
There’s mine… Older picture. Have more hashing power up and a 2nd shelf, too. 15MH, and expanding to about 20MH in the next day or so.
Top hashrates are from about 8 Gigabyte 7950s that do ~650KHs stable @ 75*C.
If anyone has any generic questions, feel free to ask. I have trained it periodically on FTC. Plan to do so after awhile on FTC yet again.
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What settings/system/program/oc do you use to get 650 on 7950.
Im considering changing my entire park of gpus and buy 15x7950…
However those hardware comparison guides are usually way off from what im able to get for some reason -
[quote name=“svennand” post=“6589” timestamp=“1369552374”]
What settings/system/program/oc do you use to get 650 on 7950.Im considering changing my entire park of gpus and buy 15x7950…
However those hardware comparison guides are usually way off from what im able to get for some reason
[/quote]cgminer --gpu-engine 1080 --gpu-memclock 1500 --thread-concurrency 22272 --intensity 20 --scrypt --worksize 256 --lookup-gap 2 -g 1
That delivers above 650 consistently for me, with the card being in the 75C range.
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hmm i know that you build awesome rigs. buuut still how are you
able to clock the cards from 850 to 1080 engine and 5000 to 6000 memory
and still keep it at 75 degrees and intensity 20??? -
[quote name=“svennand” post=“6605” timestamp=“1369555870”]
hmm i know that you build awesome rigs. buuut still how are you
able to clock the cards from 850 to 1080 engine and 5000 to 6000 memory
and still keep it at 75 degrees and intensity 20???
[/quote]The cards run at 100% fans. And this is in an open scenario, no extra fans blowing on them (in a large room). The ambient temp rose 3 degree with 3 running over night :)
I have one card though that is consistently way too hot. Same settings, it goes off the charts in no time.
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when i push my 7970 oc editions to i 20 i get hw error :(
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I find this thread really fascinating. I am sure I know the answer but do you guys even break even on these rigs? Is there part of you that does this for the love of it?
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[quote]when i push my 7970 oc editions to i 20 i get hw error[/quote]
how much ram are you running? i noticed on my VisionTek 7950 that i got hardware errors on anything past intensity 13. it had 2 gig of ram installed at the time. i swapped the 2 gig into my 5850 rig and installed the 8 gig i removed. i ran the following commands again and voila, intensity of 20 with zero errors. really woke up what i thought was a pos card. seems these cards like a lot of fast ram 8)
for windows, run these from command window. i usually add it to my miner launch .bat files so it runs everytime. probably not necessary though
setx GPU_USE_SYNC_OBJECTS 1
setx GPU_MAX_ALLOC_PERCENT 100 -
[quote name=“deroekeloze” post=“6697” timestamp=“1369578631”]
[quote]when i push my 7970 oc editions to i 20 i get hw error[/quote]how much ram are you running? i noticed on my VisionTek 7950 that i got hardware errors on anything past intensity 13. it had 2 gig of ram installed at the time. i swapped the 2 gig into my 5850 rig and installed the 8 gig i removed. i ran the following commands again and voila, intensity of 20 with zero errors. really woke up what i thought was a pos card. seems these cards like a lot of fast ram 8)
for windows, run these from command window. i usually add it to my miner launch .bat files so it runs everytime. probably not necessary though
setx GPU_USE_SYNC_OBJECTS 1
setx GPU_MAX_ALLOC_PERCENT 100
[/quote]Hmm most of my rigs have 2gb ram, but i got it on my previouse man rig with 2x7970 and 32gb ram. So dont think its the problem. Got it on other rigs with 8gb ram to.
Not sure if the problem has to do with it being 7970 and not 7950.
Think i have read somewhere that 7950 is easier to get good performance from vs 7970 -
[quote name=“chrisj” post=“6692” timestamp=“1369577579”]
I find this thread really fascinating. I am sure I know the answer but do you guys even break even on these rigs? Is there part of you that does this for the love of it?
[/quote]
Yeah, it’s typical to break even around 2-3 months, depending on what you’re mining. Lots of people who jumped on the alt craze and sold at peak broke even much sooner. With my 1750kh/s, I can make about $300 in coins a month, depending on what I mine. A single 7950 is about $315 at 650kh/s, bringing in around $3-4/day, less power costs.Cost of power can alter these numbers quite a bit, but the ROI of 2-3 months is pretty typical.
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I broke even on my investments in two months, now i have a total of 23 cards paid for and still mining 8)
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Nice rigs guys :) winner will be announced tomorrow.
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[quote name=“digiworx” post=“4243” timestamp=“1368828076”]
Hi!I am running a rig with two 6990s getting an average hash of 1750 kh/s in total at 85 - 90°C per card and besides this system, I also have a 5970 in my work computer, which is hashing at an average rate of 675 kh/s at 75°C.
Both systems use standard air cooling.
[/quote]How are you getting that hashrate with those 6990s??
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I like this thread, thanks OP
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[img]http://file:///C:/Users/MM/Desktop/Rig_pictures/multi-gpu-mining-rig.jpg[/img]
[img]http://file:///C:/Users/MM/Desktop/Rig_pictures/images.jpg[/img]not mine :(
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How do you put images here?
[attachment deleted by admin]
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I’d like to ask anyone who owns a rig, where did you get your design from and where do you source your parts?
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[quote name=“Kevlar” post=“8985” timestamp=“1370235406”]
I’d like to ask anyone who owns a rig, where did you get your design from and where do you source your parts?
[/quote]I’m going to build myself a few crate rigs like the ones in the link below. I just need to find some suitable crates or racks. If anyone has a suggestion for a decent DIY rack for custom system please let us know.
http://www.coinminingrigs.com/
I get my parts from ebay, Dabs, CCL or Scan. I’m in the UK.
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Instead of purchasing four cards like HD7950, using PCIe extenders for all of them and designing some custom mounting, you can get any used Extended ATX case or 4U 19" rack for cheap. Set up two dual GPU cards like HD7990/HD6990/HD5970 inside, the additional cards may be added through extenders if necessary. This way saves a lot of time.
