Intermittent video in new build

[Marcipicus]

Hey there. These are my system specs.

Case: TC3J-4048 :: Power Up Black 2559 ATX Mid-Tower Case with Front USB, Audio Ports and 250mm Side Fan

PSU: t T925-2060 :: Thermaltake / PurePower / 430-Watt / ATX / Dual 80mm LED Fan / 20/24-Pin / SATA Ready / PCI-E Ready / Power Supply

Mobo: MBM-MSNV-4000A :: MachSpeed MSNV-939 NVIDIA Socket 939 ATX Motherboard

CPU: AMD Athlon 64 4000+ 2.40GHz OEM Processor

Ram: ULT31664 :: Ultra 1024MB PC3200 DDR 400MHz Memory

Video Card: D10-2048 :: Diamond Stealth Radeon 9250 / 256MB DDR / PCI / DVI / TV-Out / Video Card

HDD: TSD-320AS :: Seagate / 320GB / 7200 / 16MB / SATA-300 / OEM / Hard Drive

DVD: L49-GSAH50L CA :: LG SuperMulti GSA-H50L DVD Writer -18x DVD±R Burn, 16x DVD±R Read, 8x DVD+RW, 6x DVD-RW, 10x DVD±R DL, 48x32x CD-R/RW, Black, Lightscribe (Not yet Added)

My system is booting up and I've managed to install both kubuntu and windows xp on it. The problem I'm having is that the video will work for a while (45 minutes or so..no real set number) and then for no reason it will cut out and it seems like the whole computer stops working (no hard drive or cd-rom drive access anyways).

restarting the computer gets the display working again. Video cuts out in both windows and linux

any help is greatly appreciated

P.S. the pos motherboard might be coming back to bite me

[Cricket]

Make sure the video card is inserted fully into the PCI slot.

How's your case cooling set up? How many fans and which way are they blowing?

Try this...take the side panel off and have a small fan blow into the computer. If the problem goes away you have a cooling problem and something is overheating.

Cricket

[Marcipicus]

I checked my video card. It was fine.

I have two fans set up. One on the right side taking air in and another at the front also taking air in and the PS fan taking it out. I don't have a system fan.

I did what you said with the fan blowing into the open case and it did the same thing. I also got this message from the hp w2007 monitor

"Input signal out of range change settings to 1680x1050-60hz"

I turned the monitor off then back on and the monitor system displayed the message

"DVI input active"

"H-65.3kHz V-60hz"

would this be the vertical and horizontal refresh rates or something totally different?

once again any help is appreciated