Building a new computer problems

[Complete Noob]

H i everyone I recently put together my new computer and im having problem( I apoligize if poste in wrong place) I put it all together but when I switch it on it turns off a few seconds later then on and keeps cycling. I tried breadboarding it and it still does the same thing. I thought the MB migt have been defective but it does the same thing with a new motherboard.
SPECs

CASE (PSU came with case)
RAIDMAX Blackstorm ATX-615WW White Steel / Plastic ATX Mid Tower Computer Case
CPU
http://www.newegg.com/Product/Product.aspx?Item=N82E16819115077
MOBO
http://www.newegg.com/Product/Product.aspx?Item=N82E16813130645
RAM
http://www.newegg.com/Product/Product.aspx?Item=N82E16820145346

 

[o1die]

Did you format the hardrive and reinstall your operating system? Windows may be looking for the new board drivers and not finding them, causing the rebooting cycles.

 

[Complete Noob]

Everyting is is fresh out of the box I havent even open the win 7 box because I cant get passed breadboarding. MY PSU only has a 4 pin and MB has 8 pin could it be this thats causing the problem?

 

[o1die]

The 4 pin may be adequate for a low end cpu like yours (I use a 4 pin connector for my board with the 2120) but your power supply may have issues. Using onboard or a separate video card? Raidmax ps aren't the best. I use ocz and antec.

 

[Complete Noob]

tried with separate and tried using the onboard video still no luck
Thnx for the quick reply by the way

 

[Complete Noob]

could the ps be the reason it keeps turning on and off i thought it had plenty of power?

 

[Complete Noob]

OH MY GOD I feel Stupid the ram wasnt on right thnx for the help anyways