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Last response: in Systems
November 15, 2006 6:12:38 AM

I bought the components to build a fast system, but it randomly keeps rebooting. Specifications:

Asus p5w dh deluxe mobo (last bios flashed)
Asus Videokaart PCI-e GeForce 7900GTX 512MB DDR3
Kingston 2x1gb ECC DDR2 SDRAM PC5300 CL5.0 (kvr667d2e5k2)
Intel Core 2 Duo E6600 2.40GHz FSB1066 4MB Cpu
Zalman Processor Koeler CNPS9500-AT S775
PSU: Cooler Master iGreen 500W SLI/EPS

extra PCI cards installed:
- Hauppauge PVR 150MCE
- Skystar 2

It is not a software issue because it sometimes restarts when I am in BIOS!

I am wasting my time for over two weeks now... :( 

More about : p5w deluxe rebooting

November 15, 2006 9:03:46 AM

I used memtest86+. It took 1/2 hour to complete the test, but it reported no errors.

When I entered the configuration of the tool, the computer hangs.
The tool checked without ECC, but this memory supports ECC. I wanted to test ECC too.
November 15, 2006 9:33:37 AM

AC INPUT 115V / 230V 10A / 5A 60 / 50Hz
DC OUTPUT +3.3V +5V +12V1 +12V2 +12V3 -12V 5Vsb
PEAK 25A 20A 19.5A 19.5A 19A 0.8A 3.5A
CONTINUITY 20A 15A 14A 13A 6A 0.5A 3.0A
141W 396W 6W 15W
500W (Continuous)

As I am on my work now, I cannot check the voltages as mentioned in the bios.

Regarding the tempurature: I noticed nothing special. I use the TJ05-ST from silverstone to guard the temps. I also double checked in the bios to be sure of the temps.

I didn't play with voltages till now, what should I know about the voltages used by CPU and memory?

Could there be some inconsistence between the FSB1066 and the memory running on 667Mhz?
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November 16, 2006 5:39:18 AM

The problem is solved. You will never believe this.

********** SOLUTION **********
I have a UPS with two PCI-e connectors. One is 6amp. the other 17amp.
I connected the 7900GTX card to the connector with 6 amp.

After reading a lot and a lot and a lot I came to a suggestion of someone who says that the newer graphic cards needs much more amp. then the normal ones.

I checked on internet and my card in facts need minimal 22 amp. Because I only have a maximum of 17amp. on the 12volt cable, I connected the graphic card to this connector, and ....

No more random reboots.

I hope this solution will help others who have the same kind of problems.

Thanks everyone for the input.
November 20, 2006 5:17:51 AM

How do you know about the 11A my graphic card needs? I checked the internet and I only could find a lot of topic speaking about 22A.

Where can I find something about my motherboard also supplying 5A?

And are the Cooler Master PSU not of a good quality? Then I am of luck that on the 3rd rail only the P5 is feeded.

Thanks in advance.
November 20, 2006 5:36:25 AM

Fantastic site.

Now al is working, at least I know, for the moment being, I don't need to buy a new PSU. (I hope)