Can anyone help me stop random black screens

Hello, recently i built a cpu and shortly after (2 days or so) it began sending me blackscreens. theese black screens happen at random no specific time and i cant seem to recreate the fault either . the following are the symptoms:

power remains on(fans lights keyboard)
screen goes black(duh right!?)
monitor falls asleep and says no signal when i try to turn monitor back on
i cant shut down my tower from the power buttons and am forced to use switch on psu
computer becomes non responsive(cant shut it down from keyboard either)
computer does crash(confirmed by online game, showing me logg off from another cpu)

things i tried:

bought a new power supply
reseated everything except proccessor
bought fans
updated drivers and bios
google
virus scan
verified validity of OS

if anyone has had this problem and managed to resolve it please help.

I realize you have re-intalled drivers, but just to make sure you did the proper sequence, please follow the next steps for your display card drivers.

1. Download the latest drivers for your display card(s)
2. Click Start Menu
3. Right Click My Computer/Computer
4. Click Manage
5. Click Device Manager from the list on the left
6. Expand Display adapters
7. Do the following for each adapter (in case you have multiple display cards)
   
   • Right click the adapter
   • Click Uninstall (do not click OK in the dialog box that pops up after hitting Uninstall)
   • Put a tick in Delete driver software for this device (if this option is available, otherwise just hit OK) and hit OK
8. Restart your computer after uninstalling drivers for all display cards
9. Install the latest driver for the display cards once Windows starts

Alternatively:

1. Login as an adminstrative user
2. Download the latest drivers for your display card(s)
3. Click Start Menu
4. Click Control Panel
5. Click Hardware and Sound
6. Click Device Manager (the last link under Devices and Printers)
7. Expand Display adapters
8. Do the following for each adapter (in case you have multiple display cards)
   
   • Right click the adapter
   • Click Uninstall (do not click OK in the dialog box that pops up after hitting Uninstall)
   • Put a tick in Delete driver software for this device (if this option is available, otherwise just hit OK) and hit OK
9. Restart your computer after uninstalling drivers for all display cards
10. Install the latest driver for the display cards once Windows starts

Also, do the following steps.

• If you are overclocking any hardware, please stop.
  
  
  
• Download and install HWiNFO64 Download to check hardware temperatures by running in sensor-only mode.
  
  
  
• Use FurMark: VGA Stress Test, Graphics Card and GPU Stability Test, Burn-in Test, OpenGL Benchmark and GPU Temperature | oZone3D.Net to test the graphics card GPU. Then use the |MG| Video Memory Stress Test 1.7.116 Download to test your graphics card memory.
  
  
  
• Run Hardware - Stress Test With Prime95 to determine any hardware problems. Run all three tests for a few hours each. If you get errors, stop the test and post back here.
  
  
  
• Follow the https://www.sevenforums.com/crashes-d...tructions.html to provide us with application and system logs with information about errors on your machine. These instructions can help us pinpoint problems even when the crash is not a true crash that causes a blue screen.