Boot Up Problems

[SneakyStuff]

I own a Dell Dimension 4500, when I booted my system up after installing my new graphics card, the monitor failed to find the signal, I see little blue dots in the screen. When I restart my system, everything boots up normally. This has happened...ooooo... 5 or 6 times, and i'm just curious if anyone knows why, my power supply is adequate, and my MOBO and chipset BIOS are up to date. (and yes, everyting's pulgged in)

 

[Keysplayr]

Need more info. Like what kind of graphics card? What is in your computer such as CPU and mem. Power supply.
Give us some details.

Keys

 

[SneakyStuff]

I have a true 250 watt power supply (which is said to be under-rated and capable of more maximum output)
As for the card, it is a PNY GeForce FX 5700 Ultra with 128 mb DDRII as for my CPU and memory, just read my signature, I think its there. Something tells me that it ISN'T in the power supply where the problem lies though, because the dell power supply I have is capable of handling a Radeon 9800 pro according to dell, and in fact that card came as a factory option on the later models of my system.