I'm using an i5-12400, an MSI B760M Pro-M/P DDR4 motherboard, 32GB of DDR4 memory, and an XPG Pylon 650W power supply. I don't play games—this system is dedicated to Adobe Premiere Pro and DaVinci Resolve, and I'd prefer an NVIDIA card for CUDA, NVENC, and broader software support. Budget isn't a major concern, so I'm wondering which GPU is the highest-end option that still makes sense with this CPU. At what point would the i5-12400 become a meaningful bottleneck, and would I need to replace the 650W PSU?
3 Answers
An RTX 5070 is probably the sensible upper limit for the current platform. It gives you strong CUDA, encoding, and Resolve performance without going so high that the i5-12400 frequently limits the system. A 4070 Super or 4070 Ti/Super would also be worthwhile if priced substantially lower. For demanding 4K timelines, effects, and exports, 32GB of RAM may become a limitation before the CPU does, so 64GB would be a useful upgrade.
I would not run a high-end 5070 Ti on that 650W supply unless the manufacturer specifically rates it for the card and the 12V rail has enough capacity. For a 5070, check the exact recommended PSU and connector requirements; for a 5070 Ti, replacing the unit with a quality 750W or possibly 850W model gives more headroom. The PSU’s quality and 12V rating matter more than the wattage printed on the front.
If you want the fastest option that still has a reasonable justification, an RTX 5070 Ti is about as far as I’d go with this motherboard and processor. It can help with GPU-accelerated Resolve workloads, but the i5-12400 will still handle many editing tasks well. A 5080-class card would make more sense after upgrading the CPU, motherboard, and memory rather than simply adding it to this build.
So the CPU bottleneck would depend more on the timeline and effects than on the GPU itself? I mainly work with high-resolution footage and GPU-accelerated effects.
The exact GPU model matters because factory-overclocked cards can have higher power requirements. I’d verify the card maker’s PSU recommendation rather than relying only on a general wattage estimate.