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Title: 4 th card not detected - please help ! - bounty ! (SOLVED) Post by: coda on January 19, 2014, 06:27:36 PM hi
please help me, i'm getting mad trying to fix my problem i'm sick and tired about my miner but i don't want to give up this is my first ubuntu experience and i managed to build a ubuntu 13.10 miner with : MSI Z77A G45 with 4 sapphire 7950 dual fan Celeron G 1620 2.7 GHz 8 go of DDR3 1600 gskill RAM 1250 w corsair PSU last drivers, fresh install, CG miner 3.7.2 through the install i ran into several problems but this time i don't understand what happens ... the 3 card runs @ 610 kh/s steady with clock 1020/mem 1250/vddc 1113/I 19/TC 24000 but the 4 th goes sick/dead after a period of time between 1 and 24 h (i tried I 18 and TC 21712/22400 but the same happens) note that i didn't undervolt it (the bios already said 1113 mv ... ?) here's how the cards are plugged the 1 st card is plugged on the first left 1X slot using a powered riser the 2 nd and the 3rd card are plugged on the 2 PCIE 3 16X slot in the middle with risers the 4 th card is plugged with a 1x powered riser on the last 1X slot on the right see this picture to help understand https://dl.dropboxusercontent.com/u/9768004/z77ag45.jpg i tried the two 1X slots between the PCIE 3 16X slots, i shorted the one which needed but cg miner doesn't see my 4 th card when i'm starting it ... according to the picture in the link, when my card in in the red 1X slot this doesn't work because i use an adjacent PCIE 3 slot (16X slots) ! so this is normal if it doesn't work ... but when connecting the card on the 2 slots left, which seems working i typed on the console: sudo aticonfig --adapter=all --initial it gives: found fglrx primary device section found fglrx primary device section found fglrx primary device section found fglrx primary device section Using /etc/X11/xorg.conf Saving backup to /etc/X11/xorg.conf.fglrx-23 then i typed: sudo aticonfig --adapter=all --odgt on the non working, shorted, 1X slot ( not the red one ) it gives: Adapter 0 - AMD Radeon HD 7900 series sensor 0: temperature 33.0c Adapter 1 - AMD Radeon HD 7900 series sensor 1: temperature 31.0c Adapter 2 - AMD Radeon HD 7900 series sensor 2: temperature 33.0c ERROR - Get temperature failed for Adapter 3 - AMD Radeon HD 7900 series on the working but instable 1X slot ( the last one on the right ) it gives Adapter 0 - AMD Radeon HD 7900 series sensor 0: temperature 33.0c Adapter 1 - AMD Radeon HD 7900 series sensor 1: temperature 31.0c Adapter 2 - AMD Radeon HD 7900 series sensor 2: temperature 30.0c Adapter 3 - AMD Radeon HD 7900 series sensor 3: temperature 29.0c everything seems working fine ... but i've got a instable card on this slot ! can you help me to stabilise my 1x slot or help me to activate the dead one ? i'll give a bounty to the person who helps me to find the reasons why ... thanks a lot Title: Re: 4 th card not detected - please help ! - bounty ! Post by: ineedit on January 19, 2014, 06:56:25 PM I had a similar problem, drop the engine clock on the 4th card to 950 and then slowly bring it back up, in steps leaving it long enough to fail. I have four cards in one rig where all the cards run at 1100 apart from the last one on the bus which will only run at 1025, swap the cards and the problem stays with the slot rather than the card.
Title: Re: 4 th card not detected - please help ! - bounty ! Post by: coda on January 19, 2014, 07:04:51 PM hi
already dropped to 1015 and it continues to be instable ... and i don't wan't to run my card at stock clock i've got all the things needed to achieve high performances sorry this is not acceptable for me, theses cards could go far higher this sucks Title: Re: 4 th card not detected - please help ! - bounty ! Post by: coda on January 27, 2014, 11:30:10 AM hello
is there anybody who can help me ? Title: Re: 4 th card not detected - please help ! - bounty ! Post by: BayCoins on January 28, 2014, 12:08:58 AM Can you seat the slow/inactive card directly to the mobo?
Use this code to activate all the cards sudo aticonfig --initial -f --adapter=all Reboot.. Then input the following to ensure cgminer sees everything ./cgminer -n Title: Re: 4 th card not detected - please help ! - bounty ! Post by: coda on February 16, 2014, 11:50:41 AM ok guys
after a few weeks of research i found out what was happening and i wish to share it with everybody because this fixed my problem !! with the MSI Z77A G45 go into the bios and go to advanced and there should be a option (pci Latency Timer) that has 32 and need to boost it to 64 or even more if that doesn't work to 64 ( mine was @32 and i changed to 64) here's the explanation: "PCI latency timers are a mechanism for PCI bus-mastering devices to share the PCI bus fairly. "Fair" in this case means that devices won't use such a large portion of the available PCI bus bandwidth that other devices aren't able to get needed work done. How this works is that each PCI device that can operate in bus-master mode is required to implement a timer, called the Latency Timer, that limits the time that device can hold the PCI bus. The timer starts when the device gains bus ownership, and counts down at the rate of the PCI clock. When the counter reaches zero, the device is required to release the bus. If no other devices are waiting for bus ownership, it may simply grab the bus again and transfer more data." laters |