High Fan Rpm No Boot Sequence

I'll give you a general overview of what has happened with my computer lately so we can get the big picture, I run windows 7 home premium -64bit with a asustek p7p55 lx mother board a nvidia 560 graphics card. As for the beginning of the problem, it started with my ram, I had 4gb installed and wanted to up it so I got another 4gb set (4 cards total as the board has 4 slots) it ran fine for a while but I had an issue where it wouldn't start, I decided to clean it out since it was super dirty and during trial and error found that the first ram slot was not working, I have since then had to buy 2 4gb sticks and run 10gb of ram. I recently have and issue same as when I tried to use all 4 slots that the CPU fan runs at high rpm and the boot doesn't even start. I don't get beeps or anything and so my computer is left useless! Since I upgrade my graphics card the case my computer in fits it but it had an attachable funnel type thing to channel air to the CPU, I'm wondering due to the graphics cards size I can not put that on so I have left the case off, speed fan has never shown any high temps. The computer was running fine for 2-3 weeks and then it just died.

if it does boot, it stays black and beeps once long then three short beeps, this is the same as it uses to do and I fixed it by removing the first ram slot. I've tried all of the slots and tried resetting the ram memory or what ever it's called. I forget.. Starts with a c and I'm on my phone so I can't look it up.