Well I own the 3.33 and have owned the 3.06 and I would say the difference in performance is noticeable. But for $200 is it worth it now? No. Since a refresh is probably very, very close. March is just around the corner. ...
Judging from the below tests, the top of the line dual-core 3.33 performs very well against a array of processors. Including the new dual i3 and i5's. If your thinking about getting a 21.5 machine with the 3.33, don't. Wait if you can. If you cannot I say the 3.33 will give you a noticeable performance increase.
I would wait for the next refresh which is right around the corner. The new dual core i3 and i5's are much better than the current Core 2 duos. Even though the 3.33 performs well in some tests, the i3 and i5's still out perform it overall.
http://www.anandtech.com/cpuchipsets/showdoc.aspx?i=3704&p=7
The problem with the 3.33 is that you start to get close to the price of a 27-inch or even an i5.
if you need the 21.5 and you do things like a *lot* of video encoding, the few percentage points the 3.33 saves you, might be worth it to you, but in most cases not.
Furthermore, there isn't even much "mental," reason to go for 3.33. I mean, with the 3.06 you are over 3GHZ, which sounds cool already.
It's not as though the 3.33 isn't that tiny bit better, it is, but the $200 is an AWFUL lot to pay very that very little boost. Be better put the 200 back in the bank towards an iSlate someday or something.
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Thank you for your note. It is appreciated. And so is everyone else's, btw.
Your point of "With that being said, I would wait for the next refresh which is right around the corner. The new dual core i3 and i5's are much better"...means? What is "refresh"? I just bought the 21.5"@3.06GGz+ 8 MB Ram and the upgrade on the graphics card. Will I be down the path of obsoletion around March? Is that what you mean? Please advise.Thanks!
The 3.33 is the only processor upgrade if you want a 21.5, and don't want a 27 inch. 27 inch is not for everyone. I have four 30 cinema displays hooked up to Mac Pro's for my graphic designers for my business and the 27 is not much smaller than the 30 cinema display.
The 27' refurb is the best deal on a Mac, by far. Just 1440.