The following are the components that are in the build: Asus P8P67 LGA 1155 Intel CPU Support Intel I5 2500k Sandy Bridge G.Skill F3-12800CL8D-8GBXM Ram Radeon HD 6870 xfx graphics card Basia 550 W PSU 500 GB HDD DVD-RW I'm pretty sure that they are all compatible, but the issue is when ever i hit the power button it starts up for 5 seconds then the power cuts out, but a few seconds later it powers back up. LED's on the mobo are on, HDD is spinning, all fans are going the CPU and Video Card included. I swapped the graphics card with a buddy's of mine and it worked fine on his rig. The issue that i'm experiencing is that it doesnt Boot at all. The computer stays powered on but nothing ever goes onto the screen. Granted i'm a new to building PC's but i think it might be either the Ram, or the Mobo... any suggestions?