I've recently received some new components for my PC and I'm wondering if I also need to upgrade my power supply. This is only my second time upgrading, so I'm not very experienced with this part. I'm moving from a 2060 graphics card to a 9070 XT and upgrading my CPU from an i5 to a 9900X3D. My current power supply is a Corsair RM750. I'm also considering whether I should upgrade my CPU cooling, as I'm currently using a tower fan cooler, specifically a Thermalright Assassin.
5 Answers
It really depends on the specific model of the 9070 XT. If it requires three 8-pin connectors, you should be good, but if it needs a 16-pin connector and your RM750 is an older model without a native 12V-2x6, you might want to consider a new power supply.
Your 750W is still relatively new and has a good reliability rating, which is important. However, considering the 9900X3D runs hot, it might be a good idea to upgrade your CPU cooler to something like a twin stack air cooler or a 360mm AIO for better thermal performance.
Your 750W power supply should be more than sufficient! Even under maximum load, the new setup will likely draw around 550W to 600W, which gives you some good headroom.
I'd recommend running some stress tests to see if your current PSU can handle the new components. Try using something like OCCT and FurMark at the same time; if it doesn't shut off within 30 minutes, you're likely fine! If you do decide to upgrade, the Montech Century II is a solid choice for around $80.
As long as you're using the proper cables for your GPU, like a native 12-pin, you should be set! If your GPU uses 8-pin cables, you should have no issues.
Just to clarify, the CPU can use up to 180W and the GPU around 340-360W under heavy loads, so a 650W PSU would definitely work.