How big a difference is there between 1GB and 2GB of RAM?

Hi everyone,
I am currently running 1GB of RAM on my MacBook. How much difference in speed/performance would I see if I were to upgrade to 2GB? I spend most of my time in Adobe Lightroom, Adobe Photoshop CS, Canon EOS Utility (Using my computer to control my camera in studio situations), and just the regular iTunes, Safari stuff.
If It makes any difference, I do run an external display in extended desktop mode off of my MacBook.
This is the RAM I'm thinking of purchasing:
http://www.newegg.com/Product/Product.aspx?Item=N82E16820233050
Thanks for any input.
Dave

I went from 1.25 gb to 2 gb and it works much better. Everything runs much smoother. I honestly can't say I noticed a difference in speed but I can have more windows open. I also use and external monitor and I MLB.TV on it while I am working on my main display. Never a glitch with the video. I use Photoshop CS3 and it works well.
The ram you chose looks good. I ordered Crucial RAM from NewEgg and like it.
Here are some benchmark test that will show the differences in RAM.
https://eshop.macsales.com/shop/MemoryBenchmark/AppleMacBook/

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myhighway wrote:
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I'm definitely upgrading my MacBook to at least a gig of RAM when I get it, but I am thinking about upgrading to 2. Unfortunately, even after-market RAM is rather expensive in 1GB modules.
My question is: Will I see any major differences in performance between the 1 and 2 gigs of RAM while playing games with similar requirements to Apple's "Intermediate Gaming" games such as UT2004?
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Elispiro,
Normally, I recommend 1.5 GBs for any Mac that will be "put through its paces," as gaming does. Having this amount of RAM allows for plenty of "Inactive" physical memory, which is the figure that provides a big speed boost.
You see, having enough RAM to avoid excessive "swaps" while you are using your applications provides speed boost #1. This is the most important reason to upgrade RAM, and it happens at around 1 GB. Speed boost #2 will be delivered by having a bit more than this 1 GB threshhold, through the use and maintainance of a large amount of "Inactive" memory. This memory contains code and data for applications that have quit, but might be launched again in the near future, thus speeding the availability of these applications to a great degree. 1.5 GBs of RAM provides this boost in most circumstances.
As I say, this is what I normally recommend. For owners of the new Macbooks (and Macbook Pros), however, there is another consideration. If you install memory in "matching pairs" of RAM modules, the RAM bus on the new machines will operate in "Dual-Channel" mode. This mode allows the DIMMs to be accessed simultaneously, on the same clock cycle, thereby increasing the total memory throughput.
For the Macbook Pros, this is a minor speed boost. On the Macbooks, though, it is reported that this small boost really helps with the "integrated" graphics. Since the integrated graphics processor must share main memory, this Dual-Channel mode becomes very important. Especially true of you want to play any games
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How big a difference is there between 1GB and 2GB of RAM?

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