I'm hoping to keep as much of this system unchanged as possible while upgrading from an RTX 2070 Super to either an RTX 5070 Ti or RTX 5080. The build uses a Ryzen 9 5900X, X570 motherboard, 16GB of DDR4-3000 memory, an NZXT H500i case, and a Corsair TX650M 650W Gold power supply. Compatibility tools don't flag an issue, but I'm concerned about PSU capacity, newer power connectors, case clearance, and whether one of these GPUs would be a better match for the system. What would I need to replace, if anything?
3 Answers
The 650W PSU is the main concern. For a 5070 Ti, a quality 750W-to-850W unit would give more practical headroom; for a 5080, 850W is the safer target, with 1000W being reasonable if you want plenty of margin for transient spikes. Your current supply also predates the newer ATX 3.0 power standard, so replacing it avoids relying on adapters and gives you the proper GPU power connector.
A 5070 Ti is probably the more balanced upgrade for this build. A 5080 will work with the Ryzen 9 5900X, especially at 1440p or 4K, but it costs considerably more for a relatively modest performance increase over the 5070 Ti. Before buying, check the exact card’s length and thickness against the H500i’s GPU clearance and front radiator placement.
You could also consider a Radeon 9070 XT with an 850W Gold PSU. It offers performance in the same general class as the 5070 Ti and can be a strong value, while the 9070 sits closer to the regular 5070. The trade-offs are weaker ray tracing and feature support, and driver experience can vary, so NVIDIA may still make more sense if ray tracing, upscaling features, or CUDA-related software matter to you.
Changing from NVIDIA to AMD normally just requires removing the old graphics drivers with a cleanup utility, shutting down, installing the new card, and installing the AMD drivers. It should not damage the rest of the system, though backing up important data first is always wise.
The system may not actually draw the full recommended wattage, so a 5070 Ti could potentially run on less than the official recommendation. However, this particular PSU is not ATX 3.0, which makes upgrading it a sensible choice even if the raw wattage calculation looks acceptable.