there may not be enough power. whats your power supply? also are you sure your plugging the front ports into the right motherboard jumpers?CYSYKO

im pluggling them in right .. and i ahve a 650 watt power ssupply and i am running a flash memeory card reader too ... 

Well, RAM likely isn't the issue because most mobos will still spin the fans up even if there's no RAM at all. If the CPU is not seated properly, that -will- cause the system to immediately power off (i.e. fans won't spin). Again, do you have a speaker in your system and is it connected properly to the motherboard? It's possible your system is trying to tell you what the problem is.

-Byshop

Byshop

unfortunatly my computer has no speaker ... but i will check the cpu  

some motherboards like the one i got need 2 connections to the motherboard, make sure their both connectedArch_Demonz

I've actually been amazed by the number of systems I've seen in which people simply screwed the motherboard directly to the backplate.

My experience echoes what's already been said. Generally when I hear about this issue the cause is either a mis-connected motherboard power connector or a short. Another possibility for a short is an incorrectly installed floppy drive. I had a system come into the shop one day from an irate customer who claimed we didn't test our barebones boxes adequately. It turned out that the customer had plugged the floppy power cable in one pin off, so the positive lead was plugged into a ground. The system was completely non-responsive until this was corrected.

-Byshop

Byshop

my motherboard isnt screwed directtly to the backplate.. and im pretty sure ive checked the connections 50 times and they are all as the manuals and everydone says they are....   

Sound like a PSU problem. What are your specssupergamer1289

 i have an antec trio 650 watt power supply and an asus delux sli mobo..... amd 6000+ , 8800gtx oc'd , 4 gigs of giel ram, 500 gb hard drive