Power supply requirements for an XFX RX 7600 XT GPU.
Power supply requirements for an XFX RX 7600 XT GPU.
Hi, I recently assembled a new PC with these parts:
-Ryzen 5600X
-XFX RX 7600 XT 16 GB
MSI B550M PRO VDH (no wifi)
Gigabyte P650B 650 watt 80+ bronze
Windows 11 Pro 23H2
I believe I made an error when purchasing the power supply, as it produces a lot of noise, suggesting it's struggling to provide power and operate at full speed during ultra graphics sessions. They claimed this graphics card uses similar power consumption to an RTX 4070. I tested it with my older RX 570 4GB card and didn’t encounter the issue I described. Additionally, I experienced a screen freeze a few days ago, and my PC shut down twice.
Now that I’m testing my older graphics card, the power supply operates quietly compared to the RX 7600 XT, and I haven’t had any shutdowns or screen freezes. Initially, I thought it was my new video card, but after testing with my old one, I suspect the problem lies with the power supply. Every time my computer restarts, a white light appears on my card, indicating VGA output. When I wasn’t gaming or using intensive tasks, the noise from the power supply was minimal and my PC remained stable.
I should also note that the RX 7600 XT only reaches up to 60°C at full load, without exceeding it. XFX’s website recommends a 600W power supply for this card.
Even a 4090 model doesn’t reach 600 watts. You might check hwinfo to see exactly which components are consuming power, then account for other things hwinfo can’t detect.
It seems the 7600xt consumes under 200 watts. The suggestion for bigger power supplies comes from the fact that the cards can experience very short power bursts at higher loads. The CPU power usage is probably around 65 or 80.
If your power supply meets the basic requirements, it’s likely due to a generous safety margin they included.
The only source of noise should be the fan; yours stays off most of the time unless the load increases. It could be faulty or just very loud.
I’d monitor hwinfo for both power usage and temperatures, run GPU benchmarks to confirm maximum draw, and ideally have the PSU communicate with hwinfo to report any issues. You might notice a slight drop in voltage on the 12V line if it’s struggling under heavy demand—though I’m skeptical even at full load you’d hit 300 watts.
Hi, thank you for your response. I plan to follow your advice. I've looked at other forum discussions and some users mention similar issues, one of them mentions connecting the PCI-e cable from a single output, which they describe as a daisy chained setup, just like I had it connected to the graphics card. Does this relate to my problem? For instance, Seasonic suggests keeping cables separate rather than combining them in one. In the picture I shared, I only have one 8-pin connector on my old graphics card, but with the RX 7600 XT, another 8-pin connector was connected and I've seen that it can be problematic for high-power cards.
Usually it doesn't matter as long as the cable is built for that purpose.
Inside the power supply, all the 12-volt wires connect to the same voltage regulator system. It doesn't really matter whether you use one thick wire or two thinner ones. As long as the wires are sized correctly to handle the right amperage, it will function properly.
These cables typically have thicker wire between the power supply and the first connector, then switch to thinner wire for the second...some even use the same thicker wire for both connectors. Overall, it's more economical to run thicker wires rather than having two separate cables with thinner ones.
Be cautious with very inexpensive cables from China, as they often use thinner wire and only include two connectors.
This applies to the entire system, not just the GPU. The Gigabyte isn't the highest quality option. Using two cables instead of one is a better approach simply for improved practice. Since your 7600 XT is consuming more power than the 570 model, consider using two cables (each connector) and see if it makes a difference. If not, it might be worth checking if you can return the Gigabyte PSU to get a higher-quality one.
I plan to connect the pci-e cables individually and test the situation. Regarding the power supply, a friend mentioned this Gigabyte model isn’t very reliable—it’s a Tier C unit—and suggested choosing a Tier A one instead. My brother has a Gigabyte PSU model P550B, which is actually a Tier D, but he connected it to an MSI RX 7800 XT gaming graphics card with an 8-pin PCIe connector and other 4-pin connectors. I assume the graphics card doesn’t draw excessive power, as he plays AAA games at 1080p.
I was considering your suggestions regarding a high-quality PSU. I reviewed the list of PSUs and noticed my current unit is in Tier C, so I plan to upgrade to a Tier A model. I will also reconnect my RX 7600 XT.
In agreement with @Vic 40, the balance between quality and quantity in terms of power supply units is important. There are numerous good PSUs available. Models like Corsair TXM/RMi/RMx/RMe, Seasonic Focus GX, and Superflower Leadex III EVGA G5/G6 are popular choices. Most come with 7 to 10 year warranties, making them reliable for future projects. These options will serve you well in your next build.
What are your thoughts on the MSI MPG A750G power supply? Or would you prefer the A850G instead?