Will this hold my system ??

[cubbb]

ASUS M4A78LT-M Motherboard
AMD Phenom II X2 565 3400MHz
GeForce GTX 560 Ti GS
1x 4GB DDR3
HDD Samsung SpinPoint F3 500GB

PSU http://www.bequiet.com/en/powersupply/291

 

[EpicEagle44]

This is far overkill for you computer. Getting a 600-650 watt 80+ bronze psu (rosewill or corsair would be my choices) would be a better use of money.

 

[Dark Lord of Tech]

Yes , that's more than enough power and will leave you room for upgrades.