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fdcoin

Hi all,

Im from Europe, Denmark.

Reading about bitcoin I figured I want a pice. But how can I get the lowest risk.
Mining a upcomming currency seems like the best option to me. ;)
Should it fail I can try another or sell the equipment. 8)

Just setup a 4 x 7950 rig.
Its running fine on 3 GPU currently at ~ 550Kh/s on each GPU.

But I tried overclocking and made it run at ~ 680Kh/s on each GPU - for a while.
Now the 4th GPU (GPU 2) seems dead. If active, the driver crash and cgminer mark it SICK or DEAD.

And now for the strange part - and where i hope you can help.

If I remove the “dead” GPU 2 (I can feel the one thats cold) and restart, still GPU 2 run a ~ 80Kh/s until marked dead.
But now GPU 2 is another card. I then tried to move the card to another PCIe slot. Still dead. Switched riser cabel. Still dead. Switched CPU card. Still cgminer only get 80Kh/s until GPU 2 is marked dead. For now the system run fine on 3 GPU as long as “GPU 2” in gcminder are disabled. No driver crash. So if its not the PCIe slot on the MB, not the card, not the cable - what does then fail “GPU 2”?

pyxis

Don’t run them too hard straight away, I run 4 X 7950’s overclocked at 660K/hash each.
But you can start them off at 615K/hash each with no overclocking, set at intensity 20.

I had those cards off for a two days last week while I was testing new equipment and had a problem of getting one of the cards working again, the ambient temperature was about freezing, so I assumed the card was too cold, heated the room a little (gentle and overnight to around 20C) and the card came to life next day when I fired it up.

Also if you have the monitor plugged into one of the cards try switching that around, just don’t hit the rig with a hammer. ;) Let me know how you get on.

& Welcome to feathercoin.

fdcoin

I have been trying different setting. With no overclock I can’t get 615.

Did try to switch cards around, and riser cabel, and use different PCIe slots. Always GPU 2 failed.

But I do not use --gpu-reorder that might show something else, I will try that and switch cards.

BTW: its Club 3D '13Series cards, and I have under voltage 1038 - after GPU failure - keep it on as it did not seems to change performance.

These are some of the settings I have tried.

Currently using: (550 Kh/s)
cgminer --scrypt -I 20 -g 1 -w 256 --thread-concurrency 22400 -o stratum+tcp://ltc.give-me-coins.com:3334 -u FDcoin.Worker1 -p [pass]

(and from within gcminer GPU 2 disabled).

setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1

rem 450
rem cgminer.exe --scrypt -o stratum+tcp://ltc.give-me-coins.com:3334 --gpu-engine 1100 --gpu-memclock 1125 --gpu-powertune 20 --shaders 1792 --thread-concurrency 22400 -I 19 -w 256 --lookup-gap 2 -g 1 -u FDcoin.Worker1 -p [pass] --temp-target 70

rem 470
rem cgminer --scrypt -o [url=http://stratum.give-me-ltc.com:80]http://stratum.give-me-ltc.com:80[/url] --thread-concurrency 21712 --intensity 16 --worksize 256 --lookup-gap 2 -g 1 --auto-gpu -u FDcoin.Worker1 -p [pass]

rem 550Kh/s
cgminer --scrypt -I 20 -g 1 -w 256 --thread-concurrency 22400 -o stratum+tcp://ltc.give-me-coins.com:3334 -u FDcoin.Worker1 -p [pass]

rem 550
rem cgminer --scrypt -o stratum+tcp://ltc.give-me-coins.com:3334 --thread-concurrency 16384,16384 --gpu-engine 1100,1100 --gpu-memclock 1500,1500 --temp-target 70 -I 20,20 -w 256 -u FDcoin.Worker1 -p [pass]

rem 580
rem cgminer.exe --scrypt -o stratum+tcp://ltc.give-me-coins.com:3334 --gpu-engine 1100 --gpu-memclock 1250 --gpu-powertune 20 --shaders 1792 --thread-concurrency 22400 -I 20 -w 256 --lookup-gap 2 -g 1 -u FDcoin.Worker1 -p [pass] --temp-target 70

rem 600
rem cgminer.exe --scrypt -o stratum+tcp://ltc.give-me-coins.com:3334 --gpu-engine 1000 --gpu-memclock 1250 --gpu-powertune 20 --shaders 1792 --thread-concurrency 22400 -I 20 -w 256 --lookup-gap 2 -g 1 -u FDcoin.Worker1 -p [pass] --temp-target 70

rem 640 HW
rem cgminer.exe --scrypt -o stratum+tcp://ltc.give-me-coins.com:3334 --gpu-engine 1100 --gpu-memclock 1500 --gpu-powertune 20 --shaders 1792 --thread-concurrency 22400 -I 20 -w 256 --lookup-gap 2 -g 1 -u FDcoin.Worker1 -p [pass] --temp-target 70

rem 650
rem cgminer.exe --scrypt -o stratum+tcp://ltc.give-me-coins.com:3334 --gpu-engine 1000,1100,1100,1100 --gpu-memclock 1500 --gpu-powertune 20 --shaders 1792 --thread-concurrency 22400 -I 20 -w 256 --lookup-gap 2 -g 1 -u FDcoin.Worker1 -p [pass] --temp-target 70

fdcoin

Do you run all cards without powered riser?
I think that might be my problem.
(But the problem do exists with only 3 cards also).

MB: Gigabyte GA-990FXA-UD7 ATX AM3+ (GA-990FXA-UD7)
RAM: 8GB
OS: W7
Power: Seasonic X-1250 X-Series 80 Gold 1250W

Kirosoloks

Hi and welcome.

fdcoin

[quote name=“Kirosoloks” post=“42524” timestamp=“1386691442”]
Hi and welcome.
[/quote]

Thanks.

fdcoin

Switched two cards and restarted. Now all perform at 550Kh/s. Strange.

pyxis

[quote name=“fdcoin” post=“42387” timestamp=“1386663877”]
Do you run all cards without powered riser?
I think that might be my problem.
(But the problem do exists with only 3 cards also).

MB: Gigabyte GA-990FXA-UD7 ATX AM3+ (GA-990FXA-UD7)
RAM: 8GB
OS: W7
Power: Seasonic X-1250 X-Series 80 Gold 1250W
[/quote]

Your MB & PSU specs are perfect, wish I had a seasonic, I run normal risers which is not recommended, but my rig is doing fine without.

[quote author=fdcoin link=topic=5751.msg42555#msg42555 date=1386694594]
Switched two cards and restarted. Now all perform at 550Kh/s. Strange.
[/quote

That sounds like there was a poor connection between riser and card or riser and MB, the cool thing is if this ever happens again, you’ll know that you must go over everything 10 times.

fdcoin

Still running fine.
4 x ~550Kh/s at ~75 degree Celcius. (no overclock).

Seems like a nights cool down have cured the malfunction. So I guess it can have been build up heat. But still strange.

Setting:
cgminer --scrypt -I 20 -g 1 -w 256 --thread-concurrency 22400 --auto-gpu --auto-fan

I have ordered a powered riser cabel, but for now it seems like the MB can handle the load.

fdcoin

[quote name=“Pyxis” post=“42731” timestamp=“1386713050”]
Your MB & PSU specs are perfect, wish I had a seasonic, I run normal risers which is not recommended, but my rig is doing fine without.

That sounds like there was a poor connection between riser and card or riser and MB, the cool thing is if this ever happens again, you’ll know that you must go over everything 10 times.
[/quote]

Yes its a very nice PSU and MB - except I had to return the first PSU as it blown the house fuse! Sparks from behind the power cord plug. Seems like QC failed on that unit. But the replacement works.

I don’t think it was a bad connection as I did remove and replaced cards without luck, but your right, everything must be checked and rechecked.