Trying to benchmark, computer restarts, Ubuntu 14.04

[alphAEcho]

I first installed Ubuntu Server 14.04, I installed the default driver from Ubuntu repository, then i installed OpenCL libraries, when i tried to benchmark with "./oclHashcat64.bin -b" it said that i need to reed the wiki for the right version for AMD drivers, after i found the right version I installed the dependencies, I installed the driver that i downloaded from "http://geeko.ioda.net/mirror/amd-fglrx/raw-src/" because I couldn't find it in AMD official webiste.

Now when i run "fglrxinfo" i have these results

display: :0 screen: 0
OpenGL vendor string: Advanced Micro Devices, Inc.
OpenGL renderer string: AMD Radeon HD 7900 Series
OpenGL version string: 4.4.13084 Compatibility Profile Context 14.301.1001

display: :0 screen: 1
OpenGL vendor string: Advanced Micro Devices, Inc.
OpenGL renderer string: AMD Radeon HD 7900 Series
OpenGL version string: 4.4.13084 Compatibility Profile Context 14.301.1001

display: :0 screen: 2
OpenGL vendor string: Advanced Micro Devices, Inc.
OpenGL renderer string: AMD Radeon HD 7900 Series
OpenGL version string: 4.4.13084 Compatibility Profile Context 14.301.1001

display: :0 screen: 3
OpenGL vendor string: Advanced Micro Devices, Inc.
OpenGL renderer string: AMD Radeon HD 7900 Series
OpenGL version string: 4.4.13084 Compatibility Profile Context 14.301.1001

display: :0 screen: 4
OpenGL vendor string: Advanced Micro Devices, Inc.
OpenGL renderer string: AMD Radeon HD 7900 Series
OpenGL version string: 4.4.13084 Compatibility Profile Context 14.301.1001

display: :0 screen: 5
OpenGL vendor string: Advanced Micro Devices, Inc.
OpenGL renderer string: AMD Radeon HD 7900 Series
OpenGL version string: 4.4.13084 Compatibility Profile Context 14.301.1001

display: :0 screen: 6
OpenGL vendor string: Advanced Micro Devices, Inc.
OpenGL renderer string: AMD Radeon HD 7900 Series
OpenGL version string: 4.4.13084 Compatibility Profile Context 14.301.1001

display: :0 screen: 7
OpenGL vendor string: Advanced Micro Devices, Inc.
OpenGL renderer string: AMD Radeon HD 7900 Series
OpenGL version string: 4.4.13084 Compatibility Profile Context 14.301.1001

It seems like i have the right version now, but when i run "./oclHashcat64.bin -b" to see the benchmark it restarts right after i press enter!

I would like to know if someone had the same problem, and how did they fix it if possible?

The first thing that comes to my mind is the newer version from ubuntu might have not uninstalled completely! But i am not sure what would cause this restart.

I am searching and reading about this issue, but didn't find any info yet, if i find a solution, i'll post it here, hopefully someone will reply before i loose too much time searching

Thank you in advance.

[mastercracker]

Uninstall your graphic drivers and install 14.9 (you seem to have 14.3 unless I am totally wrong).

[epixoip]

Sounds like you're tripping the circuit protection in your power supply. Looks like you have 4x 7990 or 8x 7970, how big is your power supply?

I installed the driver that i downloaded from "http://geeko.ioda.net/mirror/amd-fglrx/raw-src/" because I couldn't find it in AMD official webiste.

I thought you were crazy, but nope, looks like AMD pulled the download links for 14.9! http://support.amd.com/en-us/download/de...inux%20x86

Anyway, it's not really a good idea to download kernel code from some random site. A far more reputable mirror would be https://github.com/stricture/fglrx

Uninstall your graphic drivers and install 14.9 (you seem to have 14.3 unless I am totally wrong).

Nope, fglrx 14.301.1001 is Catalyst 14.9

[alphAEcho]

Sounds like you're tripping the circuit protection in your power supply. Looks like you have 4x 7990 or 8x 7970, how big is your power supply?

I have 4x XFX R7990, and i have a 1600W Power Supply.

Do you think that would be enough?

Also, should i reinstall the whole OS with the drivers you suggested, or what would you suggest?

[undeath]

You roughly need 400W for powering each card alone. That's without the other system components. Also your power supply should not have more than 85% utilization in total.

[alphAEcho]

You roughly need 400W for powering each card alone. That's without the other system components. Also your power supply should not have more than 85% utilization in total.

I understand, i have this power supply http://www.lepatek.com/eng/product_content/1/1/20/

I'll remove two of the Graphic Cards, just to see how it works.

Thank you for the information, this was very helpful.

[epixoip]

I have 4x XFX R7990, and i have a 1600W Power Supply. Do you think that would be enough?

Not even close to enough power! So this is almost certainly your problem.

The 7990 actually will draw just over 450W when doing things like brute force attack against MD4 (which is the first benchmark ran). So you'll need a minimum of 1900W for the GPUs alone, not including everything else in your system. If I were you, I'd pick up a second 1600W PSU.

You may also need a new motherboard as well. Inspect the ATX connector for signs of damage. This is what happened when we tried to run 4x 6990 on 2000W of power:

[alphAEcho]

I have 4x XFX R7990, and i have a 1600W Power Supply. Do you think that would be enough?

Not even close to enough power! So this is almost certainly your problem.

The 7990 actually will draw just over 450W when doing things like brute force attack against MD4 (which is the first benchmark ran). So you'll need a minimum of 1900W for the GPUs alone, not including everything else in your system. If I were you, I'd pick up a second 1600W PSU.

You may also need a new motherboard as well. Inspect the ATX connector for signs of damage. This is what happened when we tried to run 4x 6990 on 2000W of power:

Yes power was the problem, thank you for your fast responses to help me out.

The motherboard is good thankfully, including everything else.

I removed 2 Graphic Cards as i mentioned earlier and I did the Benchmark it worked perfect, the temperature didn't raise more then 80C.

Thank you again,
I really appreciate your help.