When you were installing new hardware, did you first unplug the power supply cable from the wall outlet or from the back of the power supply? I do this any time I remove or install new hardware, even if I'm only installing an extra case fan.
Clear you CMOS by unplugging the psu cable from the wall outlet, remove your motherboard battery, and then place a jumper block on the CLEAR CMOS motherboard pins for at least 20 - 30 minutes. Reset everything back to normal and then try booting with only one memory module installed in the correct motherboard slot.
See if your system will boot and remain stable with only one memory module installed.
If it works, use your system for a day to make sure that it's stable.
Try this approach with each memory module, one at a time.
You need to post a detailed hardware list in your PC Specs that includes brand names and model numbers for each component.
This includes all of the hardware in your system, including your power supply, computer case, keyboard, mouse, etc.
We aren't mind readers!!
Look at my signature and PC Specs to see the level of detail that we need.
Right now I have no idea what specific memory kit you have.
Is it 2x4GB? 4x2GB? Is it a matched kit? Did you buy each memory module individually at different times?
Do you have a case speaker connected to your motherboard's header pins?
Your best approach will probably be to perform a minimalist boot following the suggestions in GA-P35-DS3L & crucial ballistix tracer RAM, post #5.
Just in case I haven't made myself perfectly clear:
We can best help you after you create a detailed hardware list in the PC Specs portion of your
forum profile http://forums.tweaktown.com/profile.php?do=editprofile at the bottom of the
profile page or in your forum signature http://forums.tweaktown.com/profile....=editsignature.
Be sure to include brand names and model numbers.