Hello guys ! So i have a older pc..CPU: AMD A8 3870K 3.0GHz, MOBO: MSI A75A-G35, 8GB DDR3 RAM Hyperx Fury Blue at 1600mhz, a normal 500gb WesternDigital 7200rpm HDD and a 500w PSU from SAGA 2 with 80% certification ! So a few days ago i decided i had enough money and its time for a significant upgrade in terms of GPU, i swapped my Sapphire Radeon 7770 Ghz Oc Edition 1Gb GDDR5 with a brand new MSI GTX 1080 GAMING X+ 8GB GDDR5X 11Gbps ! Here comes the problem..i installed the new GTX 1080 and when i power on the PC it will make a normal BEEP that im used with cuz it does it all the time since i own the PC and that BEEP means it boots up normal but then the screen is on and in the top left corner shows a small line like this - and in the bottom right corner shows B4 or B2 sometimes and after that a short BEEP and then it just keep restarting in a loop with that short BEEP and it just doesnt boot.. ! I uninnstaled the old AMD drivers, i swapped the RAM sticks but neither of these worked for me..! When i take the gtx 1080 out and i boot with no gpu and the DVI-D plugged in the mobo it boots no problem..! I have no ideea what the problem is..maybe PSU is not enough or MOBO is too old for the 1080 ? Thanks in advice for any help guys !