so the issue: I have an emachines t5212 (i know its old and crappy but ive put some money into it) basically the problem is when i start up the computer it'll work good for about an hour tops. what happens is the mouse will stop working suddenly and i wont be able to move it at all. then a little bit after the mouse goes my wireless network adapter wont work then shortly after that my keyboard stops working. then finally at that point i have to push the power button to get the computer off and if i turn it back on it will do the same thing. now i have switched out mouses and keyboards as well as different wireless network adapters(before i switched the network adapter it would only work for about 30 minutes once i switched to the one im currently using it would work for about an hour) still the same issue which makes me think that the motherboard is going bad if everyhting stops working like that.
computer specs are
CPU : Intel® Pentium® D Processor 805 (dual-core)1
(2 x 1MB L2 cache, 2.66GHz, 533MHz FSB)
Operating System : Genuine Microsoft® Windows® XP Media Center Edition 2005
Chipset : ATI Radeon™ Xpress 200
Memory : 1024MB DDR2 (2 × 512MB), 533MHz (PC4200)
Expandable to 2GB
Hard Drive : 200GB (7200rpm, 2MB cache)2
Optical Drives : 16x multiformat dual-layer DVD±RW
(Up to 8.5GB with dual-layer media)
Write max: 16x DVD±R, 6x DVD-RW, 8x DVD+RW, 4x DVD+R DL, 40x CD-R, 24x CD-RW
Read max: 16x DVD-ROM, 40x CD-ROM
Media Reader : 9-in-1 Digital Media Manager™ (Memory Stick®, Memory Stick Pro®, MultiMediaCard™, Secure Digital™, CompactFlash®, MicroDrive, SmartMedia, xD-Picture Card™, USB 2.0)
Video : ATI Radeon™ Xpress 200 integrated graphics solution
Up to 128MB of shared video memory
PCI-Express® (PCI-E x16) slot available
Sound : 6-channel (5.1) high-definition audio
Network : 10/100Mbps integrated Ethernet LAN (RJ-45 port)
Modem : 56K ITU V.92-ready fax/modem (RJ-11 port)
Peripherals : Premium multimedia keyboard, 2-button wheel mouse, amplified stereo speakers (USB powered)
Ports/Other : 5 USB 2.0 (1 in front, 4 in back), VGA external connector, parallel port, serial port, 2 PS/2 ports (keyboard and mouse), 5 audio ports (2 in front, 3 in back)
the only things that are different is i bought a new graphics card which is a nvidia GeForce 9600 GT and i also upgraded the ram to 2 gigs rather than the stock 1 gig. all drivers are currently up to date and the computer has been taken care of as well
everything was working fine up until about 3 or 4 months ago. would just like some extra input before i go and order a new motherboard
thanks in advance