No display, just loud GPU

[jordyszita]

Hey everyone got a problem here, I just installed a new PSU for a friend and a CPU. Now before I put them in I knew on the old computer they worked but when I installed these two units on his, I get power and it will turn on but the two GPU will go very loud, like if the fan speeds were almost at %100... Nothing shows up on the screen, just loud GPU with no picture. Everything is lit up. Could it be the CPU maybe? no MB sound. like a beap

 

[chemmajorp53]

How many watts is the PSU, what brand, and what video cards are you using? Also, do you have a crossfire/sli bridge on? The computer may be confused as to which graphics card you want display signal coming through.

 

[jordyszita]

CPU: Phenom II 4 core and replace it with a Phenom II 6 core

RAM: Two sticks of 2GB each OCZ DDR 3

GPU: Two GPU'S in cross fire, one is Gigabyte and the other is Sapphire 5870

MB: Asus M4A79

PSU: EVGA Supernova NEX750G 80 Plus Gold

Case: Antec ninie 4x 120mm LED and one 200mm LED fans

Asus DvD Burn

SSD: Samsung 840 Pro 128GB

HDD: WD Caviar Black 1TB 7200 RPM 64MB

That's all and the MB is about 3-4 years old and I don't think it's ever been updated on the BIOS