If a video card requires 300w and i have a 300w psu is it ok?

if i get a video card and it requires 300w and my pc only has 300w psu is it ok or should i get a higher psu like 400w?



heres some info about my computer



its an Compaq cq5110y



Operating System

MS Windows 7 Home Premium 32-bit SP1



CPU

AMD Athlon 7550

Kuma 65nm Technology



RAM

3.00 GB Dual-Channel DDR2 @ 401MHz (6-6-6-18)



Motherboard

PEGATRON CORPORATION NARRA5 (Socket AM2 )



Graphics

Compaq Q1859 (1366x768@60Hz)

128MB GeForce 6150SE nForce 430 (HP)



Hard Drives

313GB Western Digital WDC WD32 00AAJS-65M0A SCSI Disk Device (ATA)



Optical Drives

TSSTcorp CDDVDW TS-H653R SCSI CdRom Device



i want to upgrade my graphics with a

Galaxy - GeForce GT 520 PCI Express 2.0 Graphics Card|||If your video card requires 300 Watts, where does the power come from to run the rest of your system? The above description needs a minimum of 600 Watts to run. Bigger is Better!



If you don't get a larger power supply, this is what will happen. You will reach the current limit of your voltage bus by just turning your computer on. The voltage will be reduced by your power supply to solve the over current condition safely. The voltage will then drop below what the chips in your computer can operate and they will stop working without having a safe shut down. This can damage your system.



It is better to spend a little bit more to get the largest fit, form, and function power supply you can find. It is the least expensive way to go.|||since its a "factory" PSU its not of the best quality and will probably take the card but burn out early. The general rule of thumb is...use the 20% rule that is, what ever you min. video card power is...add 20%. in your case 300W + 20% = 360W or something like this...http://www.newegg.com/Product/Product.as…

Of course 400W would be better but not necessary