What cards is my PSU good enough for?

I bought this PSU from new egg.
PSU ZALMAN| ZM400B-APS 400W RT
My Antec one which had the cable to add a PCI X card was doa so I got this as the closest replacement.
What I didnt check is if it had the cable or not, and well... it dosent.
I found on newegg that you can order an adaptor to take the regular molex connection on the PSU and make it the one that plugs into graphics cards.
I'm looking at something like a 7900gs or a low end 1900.
Is this psu good enough?
I didnt know how to check since I dont actually have the connector on the PSU.

7300 gt maximum.

Thats the minimum. I wouldnt push it.. add 2A to each of those.

What if I got one that could connect two molex plugs into one pci express connector?
Would that not give me two rails at 18A, therefore making it powerful enough?

What about for a SmartPower 2.0 450w?

It says only 15 and 17 amps, but it looks like it has 2 12v rails, would that let it handle bigger cards? Would it handle a 1950 Pro or XT?

It says only 15 and 17 amps, but it looks like it has 2 12v rails, would that let it handle bigger cards? Would it handle a 1950 Pro or XT?

No

The 400w Zalman isnt good enough to run a 7900 GS.

Of course I do. The Zalman dosent have enough power..

Whats the amperage rating on the Zalman? Nvidia calls for 300 - 350w for the 7900GS.

Thats the same as saying that u need a card with more than 128MB to play a game - it makes no sense, as the core is the only thing that matters. They just tell u 300-350w to get u off their back.

The 7900 GS dosent take a lot. The 400w Zalman gives 18A.. i would reccomend 24A, after all it is a high-end card.

It makes perfect sense as I do not want the OP to spend their money unnecessarily. If it was a generic no-name PSU then I would tell him to trade up, but Zalman's PSUs are made for them by FSP. It's a good quality PSU and worth keeping in the system as it will most likely work just fine. There's no point in buying a new one unless the OP has problems. You know, if it isn't broke, don't fix it.

And the 7900GS is considered mid-range by current standards.

That's a good price on the 7600GT. That Zalman should be fine for the 7600GT. Did you remember to order a PCI-E power adapter for it though?

:?:

That's what I meant. You said the Zalman didn't have a PCI-E GPU plug but that you found one on Newegg that would convert a standard 4-pin Molex into one. I was just asking if you remembered to pick one up when you bought the card.

I've been in several conversations here on 7300GTs, 7600GS/GTs in their AGP/PCI-E variants. I forgot that PCI-E 7600GTs don't require additional power but their AGP counterparts do. Sorry for the confusion. You'll have fun with that card. It's a good deal for the money. If you'd really like to see it shine, pair it up with FarCry ($10 on Newegg) and the FarCry 1.4 patch for some HDR fun.