Working GPU + Working Computer = No Monitor Signal

[hellomuffin]

I'm trying to install an older Asus Radeon HD 7850 into a old computer with an Asrock 4CoreDual-VSTA motherboard with a CORSAIR CX series 550W power supply. The monitor displays no signal, no system beeps. System will hang without post or display signal indefinitely.

Here's what I have tried so far:
-Tested Radeon 7850 in another rig. It works fine.
-Tested 4CoreDual computer with a Radeon 4670 gpu. It works fine.
-Flashed bios. No effect.
-Ensured that the 6pin PCI-E power connector is correctly attached. No effect.
-Tried computer with different monitor and DVI cable. No effect.
-Tried reseating DVI cable while computer is running. No effect.
-Installing graphics drivers for the HD 7850

 

[Jwpanz]

Ya this is most likely a driver issue. You need to download the drivers for that card.

 

[hellomuffin]

Ya this is most likely a driver issue. You need to download the drivers for that card.

Would that cause the system to display nothing at all? not even the post?

 

[Jwpanz]

It could, yes

 

[hellomuffin]

Okay updated drivers. No change. Any other ideas?

 

[evolt]

Hello,

Try another PSU cuz it might be a faulty ones.

Regards

 

[a.einsti3n]

Hey have you tried to swap your ram stick? it could be that. no need to change psu. i mean that is the most frequent problem when you have a working with no video signal. just swap the ram sticks and find which one is not compatible with your gpu

 

[hellomuffin]

Hey have you tried to swap your ram stick? it could be that. no need to change psu. i mean that is the most frequent problem when you have a working with no video signal. just swap the ram sticks and find which one is not compatible with your gpu

Thanks I'm going to give this a shot.