Should I use a graphics card that exactly meets the minimum system power requirement for a computer?

[25358987]

I want to upgrade my GeForce GT 610 to a GeForce GTX 660. The 660, according to a chart I read, requires 450 W minimum and that's exactly how much my computer's power supply can handle. Should I still upgrade to the 660, or should I get something else that requires less PSU? Would there be any negative effects from using the GTX 660?

In case it's needed, this is the computer I'm using: http://www.amazon.com/CybertronPC-Borg-Q-GM4213A-Desktop-Blue/dp/B00GFG1B1A

(I'm sorry if this ends up being a stupid question).

 

[dish_moose]

Problem is the psu that comes with that computer is not what I call a quality unit. If you want to upgrade the graphics, give us a budget and we will suggest a psu/gpu combo.
-Bruce

 

[25358987]

Problem is the psu that comes with that computer is not what I call a quality unit. If you want to upgrade the graphics, give us a budget and we will suggest a psu/gpu combo.
-Bruce

If I had to pick a budget, I guess I would say up to around $540?

 

[dish_moose]

PCPartPicker part list: http://pcpartpicker.com/p/BqssP6
Price breakdown by merchant: http://pcpartpicker.com/p/BqssP6/by_merchant/

Video Card: Asus GeForce GTX 970 4GB STRIX Video Card ($349.99 @ B&H)
Power Supply: XFX XTR 650W 80+ Gold Certified Fully-Modular ATX Power Supply ($109.49 @ Amazon)
Total: $459.48
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-12-26 19:55 EST-0500

This would be a smokin' combo. MSI, & Gigabyte also make good GTX 970s.
-Bruce
Edit: this will likely bottleneck your cpu but if you plan on upgrading more of your computer these parts will stay .

 

[Justin Millard]

As a good rule I try to make sure my power supply delivers 50 watts and at least 10% more power than what I will use. This guarantees I will get a stable supply of electricity to my system.

More powerful graphics cards tend to need 500w of power. So for a system that I think will use just under 500w of power I buy a PSU that is guaranteed to deliver 550-600w of constant power.

If I'm thinking of upgrading my parts later to something that will use more power then I buy a power supply that will deliver the power I think I will need in the future for those upgrades as well.
EG: the CPU I will upgrade to later might use 15w more power and the graphics card will use 50w more power.
Therefore I would buy a PSU of at least 650w guaranteed power instead of 600w to future proof my system.

There is a fair bit to think about. Good luck.