Looking for good dedicated PhysX card, will a 650w power supply be enough?

[Lucien1337]

So I recently built a new machine after the old one violently carked it, and I'm wondering if the power supply I got will be enough for two gpus running at the same time. Here are my specs:

[B]PSU[/B]: Corsair 650M 80+ Gold
Motherboard: ASRock B85M Pro4, the empty port is pci-e 2.0
RAM: 2 Kingston 8gb 1333mhz ram sticks
CPU: Intel i7-4790k 4.00ghz, stock heatsink (planning on getting another heatsink and overclocking, depends on the psu)
GPU: Nvidia Geforce 770 (stock settings except for the fans)
Case: Fractal Design Arc XL
1 1tb Seagate Barracuda HDD and a Samsung Blu-ray RW

Currently I'm looking at a Geforce 550ti or 560, but I've read that any from the Geforce 4xx series and above will do, but have to be at least mid-range models. Have also read that they can be underclocked and the cuda cores still run at the same speed? Not too sure about that last one but if I can lower the voltage and memory and still take advantage of just the PhysX then that's fine by me.

On an unrelated note, have any of you had any hardware troubles with Lords of the Fallen? It might just be my computer was just about ready to fall apart but I could swear everything was fine until I started playing it. First both my hard drives went, so I bought 2 and was a couple of days into using one of the new ones when it started to die, so I assumed it must be the ram causing it and removed the old 2gb ram sticks. It was working fine for another day then the power supply just removed itself from existence! I'm still not sure what happened so if anyone has had any similar issues please tell me. Apparently Jim Sterling had something similar when he reviewed it for PC but other than that I can't really find anything.

[Del91]

There's no point in having a dedicated physx card

[Lucien1337]

I don't bother running anything with anti-aliasing, jaggies don't bother me and I always run at varied settings per game to keep performance up. I'd like the physx card to keep the framerate at least stable when I decide to take a look at physx stuff, and there are some games that either don't have an option to turn it off or like in Lords of the Fallen the off setting doesn't actually work and it just offloads to the cpu all the time.

What's left of the other system is dead, I can't do anything with it. And I'd rather keep that power supply off for the next couple of days before I open it up, it went out like a whirling dervish and I really don't want any residual charge reaching out from the ether and arranging a meeting with my maker just as I had to shell out for another pc.

EDIT: Nothing's running poorly by the way, just have a bit left over from my spending money and would like to consider this as an option.

[Levelog]

[QUOTE=Lucien1337;47636519]I don't bother running anything with anti-aliasing, jaggies don't bother me and I always run at varied settings per game to keep performance up. I'd like the physx card to keep the framerate at least stable when I decide to take a look at physx stuff, and there are some games that either don't have an option to turn it off or like in Lords of the Fallen the off setting doesn't actually work and it just offloads to the cpu all the time.

What's left of the other system is dead, I can't do anything with it. And I'd rather keep that power supply off for the next couple of days before I open it up, it went out like a whirling dervish and I really don't want any residual charge reaching out from the ether and arranging a meeting with my maker just as I had to shell out for another pc.

EDIT: Nothing's running poorly by the way, just have a bit left over from my spending money and would like to consider this as an option.[/QUOTE]

There are like 5-10 games that exist, new and old, that have the capability to utilize a PPU.