P6N Diamond processor power connector question...

Howdy, I was looking at this review (http://www.xsreviews.co.uk/reviews/motherboards/msi-p6n-diamond/3/) and noticed it said I need an 8-pin power connector for the processor, however, my motherboard had the 8-pin setup but 4 sockets are covered with plastic piece...  Do I need to remove this piece (picture below) or not.
I do not remember the manual saying anything about it and I was actually looking for that at one time.  Any help is appreciated.
My motheboard:
The motherboard in the review:
Thanks,

I somewhat have a stable system.  Occasionally when I turn on the computer from off, it will say overclocking failed, however, I am not over clocking.  I don't know if 4-pin power is causing this or I need to tweak the BIOS a little more.
Would you suggest the 8-pin for overclocking?  I have a PSU that has the 8-pin (two 4-pin connectors snapped together), so the option is there.  And we've established that running either 4-pin or 8-pin will not "hurt" anything, right?
I have also read, while searching the Internet, where someone said that 8-pin is really only required when running a quad-core processor.  Is there any truth in this?
thanks!

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