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February 16th, 2025 17:19
Dell Optiplex 5040 PSU Upgrade
Hi I am upgrading my Dell Optiplex 5040 SFF. I am putting in a new PSU but the PSU (Corsair RM750 yellow label) has a atx motherboard pin not a 8 pin. And I was wondering if I have to plug in a cable for the 4 pin socket in the motherboard, because the PSU doesn't have a 4 pin connector.
Here are my specs:
CPU: Intel Core i3 6100 (Upgrading to i5 6500 but have to install PSU first)
RAM: 16 gb of DDR3L
GPU: 980 TI (Also adding when I replace the PSU)
PSU: Corsair RM750 Yellow Label (https://www.techpowerup.com/review/corsair-rm750/3.html)
redxps630
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February 16th, 2025 18:09
You need a 24 to 8 pin adapter for 5040 motherboard 8 pin socket.
https://www.moddiy.com/products/PSU-Main-Power-24-Pin-to-8-Pin-Adapter-Cable-for-Dell-OptiPlex-Inspiron.html?srsltid=AfmBOooKDSt0H96oSS0dGuRhAOsNMqso11H16QcUPvnMTcBzMxCdprx4
Corsair said “Our power supply units (PSUs) use an 8-pin EPS12v CPU cable that can be split into two 4-pin connectors”
https://help.corsair.com/hc/en-us/articles/360043469632-PSU-How-to-connect-a-PSU-to-a-4-pin-CPU-port
(edited)
redxps630
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February 16th, 2025 20:51
the right half of 8 pin EPS connector is plugged in 4 pin cpu socket
(edited)
wordsWK
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February 16th, 2025 18:26
@redxps630 Thank you for the reply. Are you talking about the CPU 8 pin cable? Because the CPU cable does split but I don't know what side I should use. The left side has a 4 shapes, shaped like a house and the right side has 2 house shape and 2 squares. Which side should I use?
redxps630
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February 16th, 2025 20:49
this may help
(edited)