Can I maintain my current power supply unit while adding a new graphics card?
Can I maintain my current power supply unit while adding a new graphics card?
Hello everyone, here’s a brief background before diving into my question.
My initial experience with a PSU that had at least an 80+ bronze rating was the Coolermaster Silent Pro M850. Within less than two years of use, one evening my monitor went dark and smoke emerged from the case. It turned out the PSU had already burned out. I returned it for an RMA. About three weeks later, I received notice that my unit was no longer available for sale, so I was given a newer model—the Silent Pro M2 850W.
However, since I had already purchased a spare unit because I couldn’t bear the thought of not having my PC for three weeks, I kept it in a storage room as a backup. Only after undergoing a rebuild in 2018 did I start using my replacement model as my primary PSU. It performed well and lasted until today.
Recently, I decided to upgrade again this year, swapping my Ryzen 2600 for the 5700X and purchasing an additional SSD.
Now, returning to the topic, given that modern graphics cards use significantly more power, can I still keep my existing PSU for a GPU upgrade like the RX 7900 XT? I didn’t want to invest another $170 unless absolutely necessary. Since my current PSU has reliably served me without problems, I appreciate your thoughts on this.
Here’s my current PSU:
Cooler Master Silent Pro M2 850 W Review
This mid-range PSU offers solid power for a triple-GPU setup and includes features such as silent operation, modular cables, 80 Plus Silver efficiency, and a five-year warranty. All at a very reasonable price...
www.techpowerup.com
And my PC specifications:
Ryzen 7 5700X
Klevv Bolt 3000MHz 2x8GB DDR4
AsRock B450M Pro 4
Crucial MX500 500GB
Coolermaster Silent Pro M2 850W
Coolermaster Hyper 212 LED Turbo
Inno3d GTX 1080 Ti Twin X2
Fractal Design Arc Mini R2
Absolutely, no. Having a group-regulated PSU shouldn't be used to power modern hardware. A GPU and a PSU that's a decade old would be a huge mistake, especially with an expensive GPU. A top-tier GPU should match a top-tier PSU, not one that was Tier C in the latest update.
I believed that with an 80 plus certification and a solid 12v rail, it should work adequately.
Absolutely not. Initially, 80 Plus simply means efficiency, not necessarily quality. They’re related, but only weakly. At this stage, 80 Plus essentially represents the minimum required for even a reasonably good budget PSU.
Secondly, it doesn’t provide a solid +12V rail—it’s regulated by groups. This has always been an issue, but it becomes particularly problematic with powerful GPUs that suddenly demand more than usual. Group-regulated PSUs often lead to uneven load distribution, and modern gaming PCs are inherently imbalanced in power usage. A group-regulated unit can’t be considered superior to average in today’s standards.
If you opt for an older, average PSU with a new high-end GPU, that’s your choice—it’s your responsibility and your expense—but you shouldn’t expect anyone with experience to endorse the idea. The considerable risks involved must be weighed carefully.