HP Pavilion p6754y Desktop PC of new graphics cards and after custom computer installation starts.

AMD Athlon (TM) II X 4 640 processor 3.00 GHz 4.00 GB of RAM (3.75 usable) 64-bit operating system.

I tried installing Nvidia Geforce 8400 GS hardware. If the hardware is installed, the computer lights. Start button / stop does nothing inside of the activity is a light on the motherboard. also on the back of the power supply light when plugged in for the first time but stops after you press the power button / stop. on the motherboard remains lit. but it's the only activity. also computer work very well after the removal of material. Maybe it's a bad graphics card or insufficient PSU? I also tried to install the Nvidia drivers, but they moved it not unless the equipment is installed. Help, please.

Hello
The unit you only comes with a 250W power supply (PSU). http://support.HP.com/us-en/document/c02628380

For the graphics (GPU) card you want, I recommend at least 350W because the GPU will draw 71W according to nVidia (http://www.nvidia.com/object/geforce_8400_Gs_faq.html).

Here is a video on how to to replace the power supply: http://support.hp.com/us-en/document/c01684432

Tags: HP Desktops

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