Fresh assembled PC runs for 2 mins

[Ram1991]

Hello!

I have just finished the assembly of my new pc, and ofcourse this led to more problems...

When I start it, it takes about 10-15 seconds to beep, and then when the bios startup screen (something) shows, it takes about 2 minutes before the monitor turns black, and complains about signal - basically, telling me that the signal has been lost. Though the computer keeps on thinking.

I have tried to install Windows 7, but I can't get there before the signal is lost.

Anybody's got a clue of what could be wrong?

Mobo: ASUS Stiker II NSE
CPU: Intel Q9650
RAM: Corsair Dominator XMS3 ( TR3X6G1600C8D )
GFX: Radeon HD5870
4x SATA HDD's

Regards,

Ram

 

[roonj]

http://www.tomshardware.com/forum/97744-30-motherboards
After having read this can you help by explaining what you've tried to minimize the area to address.

 

[Ram1991]

It started with saying; Detect drives done, no any drives found
So, I diabled my jmicron and all other raid subjects and now that's solved. I have only 1 hdd plugged in, but it still gives me the black screen, like there's no signal...

 

[howardp6]

Did you plug in the two PCI-E power connectors to your HD5870?

 

[jsc]

Is the cooler properly mounted?

What kind of power supply?

 

[Ram1991]

I'm running my CPU, GFX, RAM and Mobo water cooled, and yes it is.
ZALMAN HP-850 (850watt)

 

[Ram1991]

And I just tried to mount the original fan on the gfx, but with no result

 

[Ram1991]

Just cleared my CMOS and tried to boot it. I starts up fine, but when it has been running for about 2 minutes, the monitors turns black, and tells it can't find a signal. However, the computer keeps running.

Could it be my graphic card?