I want to update my video card for better gaming. I was told the PCI Express
X16 was the best way to go. I was also told that I needed to up my power
supply to 470 Watts. Is it safe to go up to 500W? I will also upgrade my
RAM to either 2 or 3 GB...I'm not sure yet. Here's my specs:

Compaq Presario SR1650NX w/ Windows XP Home Edition SP2
Athlon 64 3500+ 2.2 GHz
2000 MT/s (Mega Transfers/second)
Socket 939
Chipset : ATI Radeon XPress 200
Memory Installed 1 GB
Speed supported PC3200 MB/sec
Type 184 pin, DDR SDRAM
250 GB SATA
7200 rpm
16x DVD(+/-)R/RW DL LightScribe drive


Thanks for any help.