iMac 2.8 ghz vs. 3.4 ghz Processor for Video Editing

I am in the market for an iMac that I will use primarily for video editing. I came across two different preowned models...

2010 27" 2.8 GHZ Intel Core i7
8GB 1067MHz DDR3 RAM
ATI Radeon HD 5750 MB

2011 27" 3.4 GHZ Intel Core i7
8GB 1333MHz DDR3 RAM
AMD Radeon HD 6970M 2048 MB

Is there that large of a difference in the 3.4 ghz / AMD Radeon 6970M model to warrant spending the extra $400?
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  1. Best answer
    Which Core i7s are in the iMacs?

    "Warrant" depends on how important editing / encoding time is to you. If the software you use can take advantage of the graphics card then even better. A 600MHz increase in clock speed is substantial when it comes to video editing / encoding because they are extremely CPU intensive.

    I suspect the 2010 iMac has a 1st generation Core i7 while the 2011 iMac has a 2nd generation Core i7 CPU (Sandy Bridge). Sandy Bridge CPUs are roughly on average 12% more powerful than the 1st generation Core i3/i5/i7 CPUs. That means that the 3.4GHz Sandy Bridge Core i7 is equivalent to a 3.8GHz 1st generation Core i7 CPU. That is almost a 36% increase in raw performance.

    If the graphics card can be taken advantage of, then the increase in performance is even higher. In short I would say, yes it is worth it. Especially since we are talking about a laptop which is pretty difficult to upgrade except RAM and the hard drive.
  2. the 2011 would be best better everything you should get it.
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