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Display problems

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JitWad   12-28-2004 at 11:03:01 PM

I recently upgraded my gaming PC (wanted to try out an Athlon 64). So I slapped together the following box:

- Enermax Noisetaker 470w PSU [new]
- Athlon 64 3200+ [new]
- Soltek SL-K8TPro-939 [new]
- 2x 512 MB PC3200
- ATI Radeon 9800 Pro 128 MB
- Creative SB Live 5.1

I havent done much with it yet but get it up and running on XP and installed a few benchmarking progs to see how it stacks up againt my last machine.

I am running into an issue where I lose my video feed altogether -- that is, my monitor suddenly goes into standby. My PC is still running, but the keyboard is unresponsive (numlock, capslock, ctrl/alt/del do nothing), so I am forced to reset it. It is happening randomly, but seems to happen more often when it is under load (running Aquamark3 for instance - it will die like this halfway thru every time).

I re-arranged some of my cabling to make sure the molex connector feeding my Radeon was the only one being used on it's particular line to avoid a possible dip in the feed. Still - the problem persists.

I am thinking it may be the power supply - as I am getting strange readings from the -5V rail in BIOS and hardware monitor apps (BIOS reports it as -62.xxV and Speedfan and Motherboard Monitor report it as +3.70V) - but since I am not sure exactly what the -5V rail does, I cant say :)

Any ideas on how to debug what the cause could be?

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addiarmadar   12-29-2004 at 12:26:05 AM
- 0 +

I dont really think its the PSU for you got a good one there. Im not certain if the MBM you are using is compatible with your mobo so that could explain the wierd readings and is just misreading the sensors.

Good idea on giving the radeon its own power cable for their are sensitive to railling or dispuptiong from other componets.

Try unplugging ALL peripherals except the agp card, ram and cpu. This uncludes the case fans. If no failure occurs then plug one peripheral in at a time till failure occurs. May have a fault with one of them of multiple.

Another is to flash the CMOS and reset your settings and make sure the BIOS is giving you agp card at least 1.6v and could jump it to 1.7v but NO higher.

Also get memtest86 and run that to check for bad ram and/or ram channels.

This sounds like a mobo problem to me but dont take my word and try out the above.

<i><font color=red>Only an overclocker can make a computer into a convectional oven.</i></font color=red>

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