Which would be a better graphics card for my rig?

[Kroeckinator]

I recently purchased this rig because my computer crapped out, I know I should've built my own, but I needed a computer quick, and decided to purchase it pre-built (I can always add to it if necessary.):

Amazon.com : iBuyPower Gamer Power AM656FX Desktop (3.1 GHz AMD Eight-Core FX-8120 Processor, 8GB DDR3, 500GB HDD, NVIDIA GT630 2GB Graphics, Windows 7 Home Premium) Blue : Desktop Computers : Computers & Accessories

My question is, should I stick with the graphics card that comes pre-installed with it, or should I switch it out for this:

MSI R7790-1GD5/OC Radeon HD 7790 1GB 128-Bit GDDR5 PCI Express 3.0 x16 HDCP Ready CrossFireX Support Video Card - Newegg.com

I already have the MSI R7790 at home, it was in my previous desktop before it died on me. Which card would give me the best FPS during gaming? Thanks in advance!

 

[matts6887]

usually; most pre built systems come with the most basic setup unless you actually specify it and order it the way you want if you can. So with that in mind the second card listed is probably gonna be a bit more of a upgrade from the first i do believe.

 

[RoasterMen]

Stick with the HD 7790.

Radeon HD 7790 vs GeForce GT 630

 

[Layback Bear]

The first thing I would suggest doing is finding out what power supply your new system has and it's specs.

 

[RoasterMen]

It's PSU should be good since it's iBuyPower and they don't use OEM Parts.

 

[Layback Bear]

It cost nothing to look and know exactly what you have so a proper choice can be made with a new video card.

The 7970 card need as a minimum 500W with a 6 pin PCI-e cable.

 

[NoN]

If you swap hardware on a pre-builded system you will have to reactivate Windows OS too...

Looks you have 300W PSU pre-installed, i will check if the 7790 can handle.

Try to calculate the minimum required: Power Supply Calculator

 

[RoasterMen]

That pretty much states the obvious.

 

[Layback Bear]

Well lookie there; a 300w power supply.
Go figure iBuy put a little bitty power supply in their computer to save a few bucks.

I have already posted this.

The 7970 card need as a minimum 500W with a 6 pin PCI-e cable.

I research it on line and that is what I found. If anybody finds different requirement please post them.

@Kroeckinator

It's a absolute must to know what power supply you have and along with that you must know what the minimum power supply in Watts, and Amps that a video cards requires.

I don't recommend getting the minimum. I always go about 100 to 200 watts more.

Those calculating programs can be misleading.
A video card uses more power than anything else in most computer so it's appetite must be met.

I really don't care how many fans their are because they draw very little power.
I don't care if you have 20 hard drives because you most likely are only going to have 1 or 2 in use at one time.

Use the video card needs as a guide and add a 100 or so watts.