3 x 6990 mining rig, need help

[rocketron]

Is 2GB ram enough for 6 GPU's?

as a rule of thumb, i usually match the system ram with the gpu ram, so say 2 x 6990s is 8gb, so system ram min would be 8 gb

So that might be the problem..because starting CGminer can take like on minute before it actually does something?
And sometimes it doesn't start but the black CMD box stays empty.


Wow 4 x 6990 really? In windows?


My setup;

Asrock 970 Extreme 4
Sempron 145
CM Silent Pro 1500W
2GB RAM

that was under linux mind you, but i did have 3 running in windows at one point too.

it seems to me you need to get some more system ram, its dog cheap anyway

[merred]

Is 2GB ram enough for 6 GPU's?

as a rule of thumb, i usually match the system ram with the gpu ram, so say 2 x 6990s is 8gb, so system ram min would be 8 gb

So that might be the problem..because starting CGminer can take like on minute before it actually does something?
And sometimes it doesn't start but the black CMD box stays empty.


Wow 4 x 6990 really? In windows?


My setup;

Asrock 970 Extreme 4
Sempron 145
CM Silent Pro 1500W
2GB RAM

that was under linux mind you, but i did have 3 running in windows at one point too.

it seems to me you need to get some more system ram, its dog cheap anyway

Did I buy the correct RAM?

Mushkin DIMM 2 GB DDR3-1066,

[rocketron]

Is 2GB ram enough for 6 GPU's?

as a rule of thumb, i usually match the system ram with the gpu ram, so say 2 x 6990s is 8gb, so system ram min would be 8 gb

So that might be the problem..because starting CGminer can take like on minute before it actually does something?
And sometimes it doesn't start but the black CMD box stays empty.


Wow 4 x 6990 really? In windows?


My setup;

Asrock 970 Extreme 4
Sempron 145
CM Silent Pro 1500W
2GB RAM

that was under linux mind you, but i did have 3 running in windows at one point too.

it seems to me you need to get some more system ram, its dog cheap anyway

Did I buy the correct RAM?

Mushkin DIMM 2 GB DDR3-1066,

if your system booted it should be ok, check your mobo specs.

you could also try input the ram timings manually in the bios

[merred]

So the problems that occure when using high settings (these settings worked for 2 cards); thread 8192, i 18



CGminer crash;
Problem signature:
  Problem Event Name:   APPCRASH
  Application Name:   cgminer.exe
  Application Version:   0.0.0.0
  Application Timestamp:   5278f3b2
  Fault Module Name:   aticaldd.dll
  Fault Module Version:   6.14.10.1741
  Fault Module Timestamp:   501340a0
  Exception Code:   c0000005
  Exception Offset:   00008ea0
  OS Version:   6.1.7600.2.0.0.768.3
  Locale ID:   2067
  Additional Information 1:   0a9e
  Additional Information 2:   0a9e372d3b4ad19135b953a78882e789
  Additional Information 3:   0a9e
  Additional Information 4:   0a9e372d3b4ad19135b953a78882e789

CGminer error:
enqueueing kernel onto command queue. (clenqueuendrangekernel)



Or just a ticking CMD screen when nothing happens.

Also seems that it takes a lot of time before CGMINER actually runs.

I'll try more RAM now.

[merred]

Now using 2 x 4GB Ram (kingston 1600 DDR3).
Still the same problem. It crashes and so on .



Problem signature:
  Problem Event Name:   APPCRASH
  Application Name:   cgminer.exe
  Application Version:   0.0.0.0
  Application Timestamp:   5278f3b2
  Fault Module Name:   aticaldd.dll
  Fault Module Version:   6.14.10.1741
  Fault Module Timestamp:   501340a0
  Exception Code:   c0000005
  Exception Offset:   00008ea0
  OS Version:   6.1.7600.2.0.0.768.3
  Locale ID:   2067
  Additional Information 1:   0a9e
  Additional Information 2:   0a9e372d3b4ad19135b953a78882e789
  Additional Information 3:   0a9e
  Additional Information 4:   0a9e372d3b4ad19135b953a78882e789

[merred]

The best i can get working untill now is;


-I 17 --thread-concurrency 7040 --gpu-fan 100 --gpu-engine 880 --gpu-memclock 1250

[rocketron]

i am out of ideas dude, what version of cgminer are you using? try 3.7.2

[merred]

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 .
I'm now also getting a few HW errors..

[merred]

By the way, BIOS switch 1 or default?

[rocketron]

aslym mode 880 mhz bios

[merred]

Yes i'm in the same mode...
Grrrr 

[rocketron]

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

[okimzti]

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

[merred]

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

Hello

Thanks for your message.

I have upgraded the ram from 2GB to 8GB.
Still not enough?

[rocketron]

in my opinion you need 16+ for 4 6990s

[merred]

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.

[merred]

in my opinion you need 16+ for 4 6990s

According to someone it's my PSU

Which PSU did you use?

[TribalBob]

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.

[rocketron]

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

[TribalBob]

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.