Will I be able to use a ATI 4770?

[zenzu888]

I have a 300 Wattage PSU with 12v1/18amperage 12v2/18amp and a -12v/8.3amp

[Aaron_8015]

I doubt it will be enough..... (even with a good brand you will be pushing its limits)

What is the make and model of the PSU?

Can you list the rest of your system specs.....

Welcome to TechIMO by the way.

[zenzu888]

I am currently useing this computer.
Newegg.com - Gateway GT5670 Phenom X3 8400(2.1GHz) 3GB DDR2 320GB NVIDIA GeForce 6150 SE Windows Vista Home Premium - Desktop PCs
I do not know what brand of power supply am i useing though

[Aaron_8015]

Well you would have to take off the panel and have a look at the label. It is not really enough anyway so you will need to pick up a new one if you plan on running that card.....

Newegg.com - CORSAIR CMPSU-400CX 400W ATX12V V2.2 80 PLUS Certified Compatible with Core i7 Power Supply - Power Supplies

[ShyguyXPC]

http://www.newegg.com/Product/Produc...82E16817371023

$40, free shipping, and more than enough power for the system, also a top quality brand, like Corsair as well.