AMD Downgrade HELP! / video editing/ light gaming/ School

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http://www.newegg.com/Product/Product.aspx?Item=N82E16811156062

Is this case (it comes with a power supply) okay? Or do I need a different one? If i do I would use this;

http://www.newegg.com/Product/Product.aspx?Item=N82E16817148027

and thinking of this case;

http://www.newegg.com/Product/Product.aspx?Item=N82E16811147010

Also, for video cards I was thinking of going with the HD 4670 instead of the 4630 because they are both 512 mb and I am not doing much gaming outside of the Sims 3,

I still appreciate all inputs!

 
For $10 more, you can get the PC Power & Cooling 420w PSU which will save you more than $10 per year due to much higher efficiency. "Efficiency" is the percentage of power that can be used. That Apevia is less than 70% so its max power output is less than 350w whereas the 420w PC P&C is 82% so it can output about 340w. Lets say your entire system draws 300watts: the Apevia will draw roughly 450w from the power outlet and the PC P&C will draw only 370w. Also, the PC Power & Cooling is far better quality; its rated as one of the most, if not the most reliable power supply manufacturer.

Both of those cases include a power supply so look for one that doesn't include one which should cost less too. Also, look for one with free shipping because you can probably find one a few dollars more but with free shipping so it ends up costing less.
 
Why AMD dual core? The Phenom IIs are great, but the 7750 is based on the horrible original phenom. Intel is much more overclockable for the same price. 4670 will be fine for the sims 3. Specialk, you don't understand efficiency. A 400w psu puts on 400w, regardless of its efficiency. A higher efficiency PSU will draw less power from the wall to get the same output. Get a PSU from a reputable brand like Corsair, PC Power and Cooling, or Antec.
 
The Intel CPUs are much better than the AMD if you are looking at dual-core.

Take a look at TomsHardware CPU charts and look at the Premiere Pro CS3 HDTV in particular. This will give you the best idea of power vs price. You can also overclock them. Take the Intel e5200: it can easily reach 3.0-3.2GHz.
 
You owe Yoyojam an apology - he got it right.
A PSU's rated output is for the direct current (DC) it can provide to the PC components.
If a PSU is rated for 420watts DC output and is 80% efficient @ 100% output then it will pull 504watts of AC power from the wall socket to create that 420watts of DC power.
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