Rig stats and pics
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Yeah :)
In case anyone wants to know, my parameters are:
–worksize 256 --lookup-gap 2 --thread-concurrency 5824 -g 1 --intensity 19 -
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.
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Card 1 7950 615Khash 54°C
Card 2 7950 615Khash 69°C
Card 3 7950 615Khash 69°C
Card 4 7950 615Khash 69°C
(No overclocking, All 4 cards cooled with a single 150mm 20Watt Fan, Speed Average over 1 week)(In Overclocking tests I can get cards up over 700Khash each, but I have done no long duration runs)
Card 1 7950 665Khash 61°C
Card 2 7950 666Khash 72°C
Card 3 7950 664Khash 71°C
Card 4 7950 664Khash 73°C
(All 4 cards cooled with a single 150mm 20Watt Fan, Speed Average over 1 day, temp is max reported over a day, temp average is lower, about 66°C for the 3 hotter cards, less again for the coolest card)
(Overclocking, afterburner settings are power limit at 20%, core clock at 1100Mhz and memory clock at 1350Mhz)My final long test will push the cards to near max, using power limit at 20%, core clock at 1200Mhz and memory clock at 1400Mhz, my only problem is to keep the heat down, I will probably use some form of ducting like christian has suggested.
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[quote name=“pyxis” post=“4295” timestamp=“1368872584”]
Card 1 7950 615Khash 54°C
Card 2 7950 615Khash 69°C
Card 3 7950 615Khash 69°C
Card 4 7950 615Khash 69°C
(No overclocking, All 4 cards cooled with a single 150mm 20Watt Fan, Speed Average over 1 week)(In Overclocking tests I can get cards up over 700Khash each, but I have done no long duration runs)
[/quote]
Can you post your parameters for those 700 Khash speeds? Like the command used to start cgminer with the correct settings to reach that. I haven’t gone all the way out, I reach about 650 steady at 73C . -
My machine just crashed! :(.
I can’t reboot it till tuesday.
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[quote name=“ChristianRiesen” post=“4303” timestamp=“1368877904”]
[quote author=pyxis link=topic=264.msg4295#msg4295 date=1368872584]
Card 1 7950 615Khash 54°C
Card 2 7950 615Khash 69°C
Card 3 7950 615Khash 69°C
Card 4 7950 615Khash 69°C
(No overclocking, All 4 cards cooled with a single 150mm 20Watt Fan, Speed Average over 1 week)(In Overclocking tests I can get cards up over 700Khash each, but I have done no long duration runs)
[/quote]
Can you post your parameters for those 700 Khash speeds? Like the command used to start cgminer with the correct settings to reach that. I haven’t gone all the way out, I reach about 650 steady at 73C .
[/quote]I use GUIMiner and MSI afterburner, afterburner settings are power limit at 20%, core clock at around 1200Mhz and memory clock at 1400Mhz max, I have had a constant 710Khash but I ran it only for 1 hour as I had no cooling. I have not yet carried out longer tests so I don’t know if 700plus speeds can be maintained very long.
Hope this helps, hope I don’t blow up my rig :) All in the name of science, fun and coins. ;D
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4870 @ 100kh/s (retired until I can x-fire it with another 4870)
6950 (unlocked to 6970) @ 240kh/s (needs work to optimise) currently getting CGminer crashes at 13 intensity… -
[quote name=“Kagemusha” post=“4352” timestamp=“1368908808”]
4870 @ 100kh/s (retired until I can x-fire it with another 4870)
6950 (unlocked to 6970) @ 240kh/s (needs work to optimise) currently getting CGminer crashes at 13 intensity…
[/quote]
Just as a hint, crossfire does nothing to improve hashrates, in fact it can even lower them. -
[quote name=“ChristianRiesen” post=“4353” timestamp=“1368909118”]
[quote author=Kagemusha link=topic=264.msg4352#msg4352 date=1368908808]
4870 @ 100kh/s (retired until I can x-fire it with another 4870)
6950 (unlocked to 6970) @ 240kh/s (needs work to optimise) currently getting CGminer crashes at 13 intensity…
[/quote]
Just as a hint, crossfire does nothing to improve hashrates, in fact it can even lower them.
[/quote]Gah! More reading it is then…ta.
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Added another 200Khash in overclocking ;D and with only a few degrees heat increase. See post above for new stats.
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[quote name=“pyxis” post=“4422” timestamp=“1368982167”]
Added another 200Khash in overclocking ;D and with only a few degrees heat increase. See post above for new stats.
[/quote]
Thats some cool numbers.As a hint when doing ducting with fans: You can make it worse with ducts. I suggest using cardboard or similar material that you can fast move and alter for first trials while keeping your temperatures in constant view. If you do it wrong, you might actually deflect your fans power from where it needs to be.
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Thank You Christian.
Excellent, I have corrugated plastic board which is similar to cardboard but stronger.
I can use that for testing.
Once I get the size and shape correct, I can make a metal duct. -
[quote name=“pyxis” post=“4444” timestamp=“1368995869”]
Thank You Christian.Excellent, I have corrugated plastic board which is similar to cardboard but stronger.
I can use that for testing.
Once I get the size and shape correct, I can make a metal duct.
[/quote]
Be careful with the plastic, it might melt… Cardboard can catch fire, but usually takes a bit more than the plastic melting point :)A good begin is to get directly form the fan to where the cards start. Close holes on the sides, etc, then the air should get much more direct on target.
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Still cant help but think you’re over thinking the cooling/ducting. I have 3x 12" desk fans that cool all 5 of my rigs. Current temps on Miner-01 65,63,66,70. KISS (Keep It Simple Sir).
Oh and if you manage to set fire to cardboard on your GPU’s - you’re doing something very wrong. :P
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Rig stats updated :P Please let me know if you think I’ve missed something.
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Top Man!
The Sapphire stats aren’t mine though. :-\
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[quote name=“Nutnut” post=“4837” timestamp=“1369120058”]
Top Man!The Sapphire stats aren’t mine though. :-\
[/quote]Woops haha let me fix that
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Two cards were replaced.
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I have 3 x 7950’s temps are abit weird.
Temps are - 59, 69 and 89
Seems which ever one i use in slot one cant keep it under 89? I have to run this @ only 460 k/hash while other are on 600 k/hash with no problems.
Pics included below:
[img]http://s22.postimg.org/6e43whmox/IMG_0493.jpg[/img]
[img]http://s17.postimg.org/ufzmpt333/IMG_0494.jpg[/img] -
Slot 1 being the slot closest to the CPU or the one balancing on the soup (one way to warm your lunch!).
If it’s the CPU side (though the pictures imply that you are calling the soup card slot 1) then that’s normal for the gigabyte windforce as the fans suck in the hot air from the back of the card in front - great cards but awful cooling design!
If you mean the “soup card” and your sure all 3 behave the same then there is a serious issue there. Are you using afterburner or something like that to OC? Maybe it’s screwing with your fan speeds and preventing them from spinning up? What does CGMiner say about the fan speeds?