Choppy animations

I bought my first mac (mac mini) a week ago. And I experiecing distracting, choppy animations when resizing window, drag and drop operations, in application animations like sliding panels, launchpad animations, expose animations. I upgraded to 5GB ram but doesnt change for animations (programs running, startup very fast, but animations).
I cant work on Photoshop because its SLOWEST even in 1024x768 document!!!
This is my first apple product, and i really unhappy.
Here specs:
2.3GHz dual-core Intel Core i5
2GB memory (Upgraded to 5GB)
500GB hard drive1
Intel HD Graphics 3000
OS X Lion
My friend's Macbook Pro 13.3 have the same specs except 2.5Ghz and his mac have 4GB ram. But his mac doesn't have any choppy animations.
Why is that happening and how can i solve this problem.

While I don't have that Mini, I've never seen Intel Integrated Graphics that were worth their weight in feathers..
Open Activity Monitor, Show:>All Processes, sort on CPU%, see if anything using too much CPU% when this happens, click on Memory tab, do you have many Pageouts?
Open Console in Utilities & see if there are any clues or repeating messages when this happens.

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<Font Size = 2>Hello everyone,
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Maxideon wrote:
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jklh;j
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Hi, [url http://forums.oracle.com/forums/ann.jspa?annID=1391]Welcome to the new home(Announcement:the code tags)
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