Wow I can't believe that I didn't think of that. What is the exact make and model? Radeon HD 5450 is for the graphics chip however the card would have been assembled by another manufacturer (see here: Newegg.com - Radeon HD 5450). I ask because as you can see there are different ones and a few that I saw appear to have an additional spot for a power source whereas another didn't. If you don't have everything connected correctly then the card won't get enough power to function properly. See and follow the manufacturer's instruction manual. Also note the minimum recommended wattage for your PSU is 400 whereas your PSU is 250 watts. The card won't function as well with so little wattage than it would if your system met the recommended requirements.
My Computers
System One System Two
-
- Operating System
- Windows 8.1 Industry Pro x64
- Manufacturer/Model
- HP Pavillion Elite HPE-250f
- CPU
- Intel i7 860 Quad core 2.8 ghz
- Memory
- 8 gb
- Graphics card(s)
- ATI Radeon HD 5770 1 gb ram
- Monitor(s) Displays
- Alienware 25 AW2521HF
- Screen Resolution
- 1920x1080 &1680x1050
- Hard Drives
- 1 TB x2
- Other Info
- https://www.cnet.com/products/hp-pavilion-elite-hpe-250f/
-
- Operating System
- Windows 2012 R2 Data center/Linux Mint
- Manufacturer/Model
- Dell Poweredge T140
- CPU
- i3 9100 3.6GHz, 8M cache, 4C/4T
- Memory
- 8GB 2666MT/s DDR4 ECC UDIMM
- Screen Resolution
- 1680x1050
- Hard Drives
- 1 TB & 360 GB x2
- Other Info
- https://www.dell.com/en-us/work/shop/productdetailstxn/poweredge-t140?~ck=bt