b450m pro4 PSU cable question
Printed From: ASRock.com
Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=113439
Printed Date: 01 Oct 2026 at 8:59pm
Software Version: Web Wiz Forums 12.08 - https://www.webwizforums.com
Topic: b450m pro4 PSU cable question
Posted By: mli170
Subject: b450m pro4 PSU cable question
Date Posted: 25 Jan 2026 at 11:42pm
| i have a b450m pro4 motherboard with a 8 pin cpu power connector my psu has only a 6 pin can i use a adapter for it from 6 pin to 8 or can you use a 4 pin to 8 pin adapter |
Replies:
Posted By: Xaltar
Date Posted: 26 Jan 2026 at 9:16am
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No, don't use an adapter on the 6pin, that is for PCIe power not CPU power. You can use a single 4 pin occupying one side of the motherboard connector. You can use a 4 to 8 pin adapter too but, get a decent power supply. If it doesn't have an 8pin CPU power connector it is either a cheap piece of junk or old. Just because "it will work" doesn't mean you should use it. Older power supplies that don't have an 8 pin tend to not be up to the task of running newer boards, if the PSU is old enough it may not even have enough power on the 12v rail for the system to run stably. Cheap junk PSUs are often leftover new old stock that is repackaged and sold cheap, often with misleading labeling like Max 450w when the actual wattage is 250w for example. Do yourself a favor and use a decent PSU, it should at least be 80+ certified. A bad PSU can damage every component in your system, it is the last thing you want to cheap out on. Take it from someone who fell for the whole "but this PSU worked fine in my old PC" only to have it pop and kill my motherboard, hard drives, GPU and CPU. An expensive mistake all because I thought I could get away with not upgrading it and put the money toward a better GPU.... These days, I won't even use a PSU like that for testing purposes. ------------- 
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