Will my old PSU cut it?

[Kabob]

I'm looking to upgrade some components and I'm wondering if my old PSU will cut it.

I'm running an Enermax EG465P-VE and it's been great on my old A64/X800 XT PE setup. I'm looking at upgrading along the lines of:

Phenom II X4 or Core i5 (if i5, probably dual core)
3-4 GB DDR2/3
ATI 4890/5770 or Nvidia GT 240/8800 GT/GTX 250 (know that's a broad spectrum)
1 optical drive
1 HDD

Also, power consumption-wise will there be a difference between 4x1GB and 2x2GB of RAM?

Thoughts?

 

[HOOfan 1]

It should have enough power, but I myself would upgrade if I were you.