Why when I install my new video card is it not working?

I have a HP pavillion a6057c computer. The motherboard specs are here. http://h10025.www1.hp.com/ewfrf/wc/docum…



I currently have the ATI radeon 4600 card installed in it. I am upgrading to the ATI radeon 5750 HD card. The specs for that card are here http://www.amd.com/us/products/desktop/g…





So this is my problem. I turn off my computer, pop in the new card and connect the power supply and monitors and nothing happens. I take out the new card and put in the old card and it works fine. When I have the old card in and go to install the new card drivers, it prompts me to install the new card first and the drivers second. So is my new card not compatable with my motherboard? I dont know what the problem is. Any suggestions will be great.|||If you plug the 5750 into the motherboard the exact same way as the 4600, and also have it plugged into the power supply's PCI-E power cable, and you still get no video on the screen, then the 5750 might be defective.



I say *might* because it looks like your system only has a 250w or 300w power supply. If you used the 5750 on such a weak power supply, even if it DID work initially, it would burn out your PSU in about two to three months. So, if you're going to be doing any video card upgrades, you absolutely need to replace that weak PSU first.



I linked two reliable, high-quality power supplies below that would be compatible with your system; I checked the hardware manuals on HP's website to make sure. :) Nothing extravagant; just stable, efficient power that would handle a 5750 reliably for years to come.|||what do you mean by nothing happen? is the power turn on or is the screen just black? please provide more detail|||PAVILION A6057C HOME PC has a 250 watt power supply.

HD 4600 requires 400 watt or greater power supply.

HD 5750 requires 450 watt or greater power supply with one 75W 6-pin PCI Express power connector.



Uninstall the ATI Display Driver and Catalyst Control Center.

Install the HD 5750

Install the ATI Display Driver and Catalyst Control Center when the new hardware is found.|||If you can’t find the right video card drivers manually for your hp computer I would recommend just getting a software program that can do it for you. There is a program I use which will find drivers for just about all hardware devices. The best part is it takes a snapshot of your system specifications and matches the right driver to go with it. Perform a free driver scan at:

http://www.drivers-updates.net/drivers/v…

You can also search by the following link:

http://www.hp-drivers.org/