5040 has two form factor: mt and SFF. SFF uses TFX psu, stock psu is 180w per spec.  DP/N 9XD51, 5XV5K, TDFTP [IMAGE] 180w   mt also uses TFX psu.  stock psu is 240w per spec.  DP/N THRJK 4GTN5 D7GX8 HGRMH 2P1RD H62JR 3RK5T Amazon sells OEM 240w psu for it.  you can also search for it on eBay for used 29.99 free shipping .  You can just use the 240w psu for mt in your SFF.  This psu will fit SFF case perfectly and connectors are identical to 180w.  Note the 240w psu is not standard DP/N for SFF psu and its usage is outside the scope of Dell. [IMAGE] 240w
I've been checking the reviews for MSI GTX 1050 ti LP and it says I need a 240w or 300w power supply, does anyone have a 240w or 300w power supply for my dell optiplex 5040 SFF?
PSU change for Dell Optiplex 5040