Memory upgrade on a 3.33GHz C2D late 2009 27" iMac

Hi,
I was pretty much ready to buy a 8GB memory kit for my late 2009 27" iMac (KTA-MB1066K2/8G), and now I read on wikipedia that optionally some of the C2D 3.33GHz iMacs had a bus speed of 1333MHz, rather than a 1066MHz.
I just checked on mine under the system profiler, and found out that the bus speed is indeed 1.33GHz. Would I get better performance if I used 1333MHz chips then? If so is there a kingston recommended one I could buy? I ask this because they themselves don't post a product for this particular case, and just suggest to buy the 2x4GB 1066MHz DDR3 chip kit. And the two that are currently in the Mac are 1067MHz according to the system profiler.
Thanks,
Fabrizio

To echo fbartolini, I installed (2) Kingston KTA-MB1333/4G in my Late 2009 3.33GHz Core 2 Duo in the slots opposite of where the OEM ram was installed, and everything works great. I tried to install (3) Kingston KTA-MB1333/4G sticks in the computer, but it would not take it. (2) Kingston KTA-MB1333/4G and (2) of the original 2GB 1067MHz sticks does work, but geekbench memory tests come in at a lower rating.
Below are memory geekbench scores of relevant setups
8GB of 1333 & 4GB of 1067
http://browser.primatelabs.com/geekbench3/414372
8GB of 1333 only
http://browser.primatelabs.com/geekbench3/414391
Hope this helps anyone who is looking for the same info!

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Message was edited by: sr.matto (spelling)

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Memory upgrade on a 3.33GHz C2D late 2009 27" iMac

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