My Corsair TX550M has started intermittently refusing to power on my PC. The other components have been tested and appear to be working, so I'm fairly sure the power supply is failing. Since the TX550M seems to be discontinued and I can't find an exact replacement, I'm looking for a reliable modern alternative at around £80, although I'm open to spending more if that's realistic. My system has an MSI B450M PRO-M2 MAX motherboard, 16GB of DDR4 RAM, an AMD Radeon RX 580, and an AMD Ryzen 5 quad-core processor. What wattage and models would make sense for this build?
3 Answers
The TX550M uses the standard ATX format, so you don’t need an identical replacement. Any reputable modern ATX power supply with the right connectors should work. For this system, a quality 450W–550W unit is enough, though a 650W model may offer better value or upgrade headroom around your budget.
The TX550M is an older discontinued model, so replacing it with a newer unit is a good idea rather than hunting for the exact same one. Look for a reputable 80 Plus Bronze or Gold PSU, and compare models using a reliable PSU tier list. A good 650W unit is often competitively priced and would be more than sufficient for an RX 580 system.
Makes sense—I built this PC years ago and didn’t realize the PSU had been discontinued. I’ll compare newer models and check their quality ratings.
This PC doesn’t draw a lot of power, so even a quality 450W Bronze unit should handle it comfortably. You can use a parts-price comparison site to find options available in your country, then verify each model’s position on a reputable PSU tier list. Ideally choose a B-tier unit, but a well-reviewed C-tier model can also be reasonable if the budget is tight. A 650W model such as the ASRock Pro 650G may be worth considering if it’s competitively priced where you live.
That’s helpful—thanks! I was hoping to spend roughly £80, but I wasn’t sure what current PSU prices looked like.