Hi guys, i have a question.
My post to i5 overclocking topic was little burried by posts with OC results, so i made a separated topic.

Its 8-pin (cpu power) necessary for a i5-750 cpu?

The situation :
cpu : i5-750
mobo: asus p7p55d
psu: arctic cooling fusion 550w

This psu has 2x 12v rails, each 17A, and only has 4-pin for cpu power.
The motherboard has 8-pin, but 4-pins are covered by black plastic "thing".
Is it safe to have combination mentioned above and only 4-pin plugged to motherboard for powering cpu?
Also, i found this


Are there any limitations when i only have a 4-pin? How about OCing? What is the pwr consumption of i5-750?

Can someone try runing on 4-pin instead of 8-pin? (im not responsible for any damaged hardware, personal injuries etc. )

edit: oh i almost forgot! how about this 4to8-pin http://www.plinkusa.net/web4-to-8.htm ?

Thanks for your help!