Do I need a new PSU?

[NotAGolf]

I'm going to upgrade my graphics card in the new future to either an 8800GT 512MB or a 8800GTS 512MB, or possibly even a GTX, bt that's unlikely. The setup will be as follows:

- [email protected]
- Asus P5N-E SLi
- Geil 2GB PC6400 DDR2
- 2 Sata HDD's and 1 external on usb
- OCZ Modstream 450W
- plus one of the above cards

Now I can see that the weak link here is the PSU, I don't really have enough to buy a big one so if I was to get one it would probably be the corsair 520/550W, so come next upgrade it wont be good enough so i'll have to replace it agian. So ideally I want to stick with my OCZ but is this pushing my luck, or should it be ok? I've used a few of those online power calculators and it says around 400W should be ok but I just wanted to get your guys views?

Thanks.

 

[NotAGolf]

How old is the PSU? If it is fairly new then it should be fine but since they become less efficient with age I'd be a bit more wary if it was more than a year or so old.

It's about 7 months old. So do you reckon I should be alright to keep my current PSU?

Thanks for the replies.