Help im a noob

[basketjaco]

I have a Gateway GT5220. My brothers HP  computer broke. He has some good parts in there i was wondering if i can take his video card  and ram  to put in my computer.

The video card is xfx 9400 GT  Standard 550 128bit DDR2 512MB 800MHz 1400MHz Fansink Minimum Power Supply Requirement: 350 Watt

The ram of my brothers computer is a 1 gb pc2-5200

This is my computer
Windows 7
AMD AthlonŽ 64 X2 3800+, dual core processor with AMD64 technology
2.0 GHz
200 MHz system bus
512KB × L2 cache
3 gb ram (expandable to 4gb)
power supply: 300 watt
pc2-4200  DDR2 533 MHz

[Azzaboi]

RAM has to be compatible, if it's the same type or compatible with the motherboard and other memory it will then run fine but at the slowest one(s) speed (so don't add it if it's slower, it will just slow the others down).

The graphic card will need a better power supply (PSU) to run stable or even startup. 

[Linux711]

The graphic card will need a better power supply (PSU) to run stable or even startup.

Not neccisarrily true.

I have a 9500 GT on a 305 watt power supply. A 9400 GT on a 300 watt should be fine. If you want to be sure, look for +12V amperage on your power supply. If it is > or = to 18A, then it will work.