Hey there, just bought a computer, a bought it with out an OS so i did a clean install my self. This is all fine and dandy until i install the drivers for my graphics card, the graphics card is the 4850ati 1GB, Once i do this my computer BOOTS up but when it loads it will lose signal and the screen will go strange. Im not sure of what the problem could be, any one have any ideas, the computer is fine until i install the graphics card drivers but OBVIOUSLY with out it looks disgusting. Ive tried installing the drivers from the website and from the CD, it nearly worked once and my screen looked ok, but then it kept losing signal and going on and off.

My pc specs are:

Asus p5q pro
Intel core 2 Duo E8400
ATI 4850 1GB

Think thats all you need to know.

Thanks in advanceIs it possible you can try another monitor?Also, what operating system are you using?
Your power supply would also be helpful.ATI Radeon™ HD 4850 System Requirements
PCI Express® based PC is required with one X16 lane graphics slot available on the motherboard
450 Watt or greater power supply with 75 Watt 6-pin PCI Express® power connector recommended (550 Watt and two 6-pin connectors for ATI CrossFireX™ technology in dual mode)
Certified power supplies are recommended. Refer to http://ati.amd.com/certifiedPSU for a list of Certified PRODUCTS
Minimum 1GB of system memory
Installation software requires CD-ROM drive
DVD playback requires DVD drive
Blu-ray™ playback requires Blu-ray drive
For a complete ATI CrossFireX™ system, a second ATI Radeon™ HD 4850 graphics card, an ATI CrossFireX Ready motherboard and one ATI CrossFireX Bridge Interconnect cable per graphics card (included) are required

also check your drivers are certified for your OS...you just listed the system requirements for your video card...Quote from: BC_Programmer on November 26, 2008, 03:43:01 PM

you just listed the system requirements for your video card...

no I listed them for his video card, then said check your drivers...reason I listed them was for
previous poster who asked about power supply...

so what's your point???

450W?? is that enough for a 4850?