Question No signal problem from GPU's

[Obitos]

asus radeon r7 240 4gb dd3 / amd radeon hd 5450 1gb dd3

I bought an asus radeon r7 240 OC 4gb dd3. But when I put it in the slot, nothing happens to the fan on the board, but it tells me no signal. I changed the Power Supplies with a 500w one because the plate requires 400w but then nothing happens yet when i put the old video card an amd radeon hd5450 ddr3 the pc clicks sound and starts but when I put the new video card it does not make any click sound and no signal appears if you can help me that would be awesome

CPU: intel(r) xeon(r) cpu x3320 2.50gh 4 core
Motherboard: foxconn q45m
Ram: 8gb dd2
SSD/HDD:
GPU: amd radeon hd 5450 1gb dd3
PSU: Spacer SPS-ATX-500
Chassis:
OS: windows 10

 

[Lutfij]

When posting a thread of troubleshooting nature, it's customary to include your full system's specs. List them like so:
CPU:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:

Also, mention the makes and models of the two PSU's you've used and their age. Include how your connecting to your display and the make and model of your display.