Pages:
Author

Topic: 3 x 6990 mining rig, need help (Read 2181 times)

newbie
Activity: 1
Merit: 0
February 25, 2014, 03:58:09 PM
#46
Any chance I can revive this thread?Tongue There seems to be good info here with knowledgeable people.

I'm trying to run 3x6990's on my rig as well but I'm getting strange results Cry

Sempron 140
Corsair 1200W (CMPSU-1200AX)
2x1GB RAM
Driver 13.12
SDK 2.9
CGminer 3.7.2
Win 8.1 x64

I'm currently running two just to see if I can make this work (and to rule out the PSU).

I can't raise the intensity of my cards past 11. When in 12, it will mine for a few hours, then just stop. Anything higher and it will last only about 2 mins.


What happens is that cgminer is seemingly doing fine for a minute or two, then all of a sudden the program freezes and CPU usage goes all the way up to 100%. No "ghosting" on the cgminer window or any error messages.

Windows itself doesn't completely crash but it becomes pretty unusable. If you move the mouse, you don't see the pointer move all the way, you just see it jump from place to place. Any input (keyboard or mouse) in this state takes about 20 secs to happen.


My batch currently is
cgminer.exe --scrypt -o stratum+tcp://uswest.wafflepool.com:3333 -u 1663f2rW79j9chkvwt783qv52ifEN7hDaP -p x --thread-concurrency 8192 -g 2 -w 1024 --temp-overheat 80 -I 11

It was mentioned by rocketron that I should NOT let CCC install but I can't figure out how to do that.

Suggestions? Comments? Concerns? Consolations Embarrassed? Anything is greatly appreciated.
sr. member
Activity: 616
Merit: 300
December 19, 2013, 05:58:03 PM
#45
I didn't know my PSU wasn't decent..score 9.7/10
http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story&reid=175
I will look for a second PSU of 450 W or something.


hold on sec, that psu has 8x12v rails with up to 120amps!!! each rail is 25amps

"class-leading eight +12V rails with 110A (Peak up to 120A)
-That's a lot of rails, but then again 110A is a lot of power"

theres nothing wrong with your psu m8, thats a very good one! and well capable of running 3x6990s
full member
Activity: 126
Merit: 100
December 19, 2013, 05:24:25 PM
#44
I didn't know my PSU wasn't decent..score 9.7/10
http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story&reid=175
I will look for a second PSU of 450 W or something.
sr. member
Activity: 616
Merit: 300
December 19, 2013, 04:15:37 PM
#43
get yourself a decent psu then, something like corsair ax1200, or the evga supernova is a great psu
full member
Activity: 126
Merit: 100
December 19, 2013, 03:21:09 PM
#42
It's NOT the watts, I have plenty of Watts.
It's the Amps for each 12V line. I only seem to have 4 12V lines.
sr. member
Activity: 616
Merit: 300
December 19, 2013, 02:32:44 PM
#41
the specs are quoted by manufacture for a recommended powersupply, not for actual power usage used by the gpu's! this is the misconception about powersupplies

wattometers do not lie!

heres a screenshot of the onboard power meter on my axx1200i for 2x 6990s

https://www.dropbox.com/s/jkzvbi07wkhnzqh/psu.JPG

1500 watt psu is more than enough for 3x 6990s
sr. member
Activity: 1288
Merit: 257
Chainjoes.com
December 19, 2013, 02:16:48 PM
#40
According to someone it's my PSU

Which PSU did you use?

They are correct. Your GPU's require 750w each for minimum requirements (1000w for crossfire setup) which means your GPU's alone will need between 1750 - 2250w and then your sempron needs another 45w.

your wrong on specs,

my rig pulls 785watts from the wall according to me meter, 2x 6990s, so for a 3rd you can add about 350watts. so his psu is fine

Ok, then tell the companies that created his GPUs that THEIR specs are wrong, I am telling him the factory recommended system requirements for his make and brands for solo and crossfire set-ups.
sr. member
Activity: 616
Merit: 300
December 19, 2013, 02:04:16 PM
#39
According to someone it's my PSU

Which PSU did you use?

They are correct. Your GPU's require 750w each for minimum requirements (1000w for crossfire setup) which means your GPU's alone will need between 1750 - 2250w and then your sempron needs another 45w.

your wrong on specs,

my rig pulls 785watts from the wall according to me meter, 2x 6990s, so for a 3rd you can add about 350watts. so his psu is fine
sr. member
Activity: 1288
Merit: 257
Chainjoes.com
December 19, 2013, 01:46:57 PM
#38
According to someone it's my PSU

Which PSU did you use?

They are correct. Your GPU's require 750w each for minimum requirements (1000w for crossfire setup) which means your GPU's alone will need between 1750 - 2250w and then your sempron needs another 45w.
full member
Activity: 126
Merit: 100
December 19, 2013, 12:50:35 PM
#37
in my opinion you need 16+ for 4 6990s
According to someone it's my PSU

Which PSU did you use?
full member
Activity: 126
Merit: 100
December 19, 2013, 12:07:53 PM
#36
Why is that?
I have only 3 x 6990



Shit looks like that i'm on AMD 12.8
I'll try 13.11 now.
sr. member
Activity: 616
Merit: 300
December 19, 2013, 12:04:38 PM
#35
in my opinion you need 16+ for 4 6990s
full member
Activity: 126
Merit: 100
December 19, 2013, 11:54:11 AM
#34
cgminer will crash if you use too high of thread-concurrency and not enough ram to support the threads.  The reason why 8192 worked with 2 cards is because you are using less memory with 2 cards.  Adding two more gpu's with the thread-concurrency at 8192 and you are over allocating memory and cgminer wont start.  Simple as that.

Either run lower thread-concurrency with 6 gpu's or get more ram...

Also, you might benefit from reading about the internet.  All this info is freely available Smiley
Hello

Thanks for your message.

I have upgraded the ram from 2GB to 8GB.
Still not enough?
member
Activity: 101
Merit: 10
December 19, 2013, 11:43:12 AM
#33
cgminer will crash if you use too high of thread-concurrency and not enough ram to support the threads.  The reason why 8192 worked with 2 cards is because you are using less memory with 2 cards.  Adding two more gpu's with the thread-concurrency at 8192 and you are over allocating memory and cgminer wont start.  Simple as that.

Either run lower thread-concurrency with 6 gpu's or get more ram...

Also, you might benefit from reading about the internet.  All this info is freely available Smiley
sr. member
Activity: 616
Merit: 300
December 19, 2013, 11:41:06 AM
#32
could also be your cpu not providing enough bandwidth to run the gpus, bear in mind I am running on X79 with a I7 3970X
full member
Activity: 126
Merit: 100
December 19, 2013, 11:30:42 AM
#31
Yes i'm in the same mode...
Grrrr  Cry
sr. member
Activity: 616
Merit: 300
December 19, 2013, 11:06:09 AM
#30
aslym mode Wink 880 mhz bios
full member
Activity: 126
Merit: 100
December 19, 2013, 11:03:45 AM
#29
By the way, BIOS switch 1 or default?
full member
Activity: 126
Merit: 100
December 19, 2013, 10:59:53 AM
#28
So you got 3 x 6990 running in windows with above settings?

I think i will switch in linux to give that a try.

Yes Catalyst 13.1 without CCC, Cgminer 3.7.2, SDK 2.7

For some reason, it only accepts low settings. Thread concurrency above 7500 = crash or no nothing happens.
Same for intensity above 17.
So i'm stuck currently with 2800khs for 3, which is not too bad..but I was getting +2KHS from 2 cards Sad.
I'm now also getting a few HW errors..
sr. member
Activity: 616
Merit: 300
December 19, 2013, 10:52:48 AM
#27
i am out of ideas dude, what version of cgminer are you using? try 3.7.2
Pages:
Jump to: