I'm considering whether to upgrade my existing setup or just build a new rig entirely. My current situation is that I'm limited on GPU size because I have an iTX case (can only fit cards that are <= 2.5 slots). Here's my current setup and what I'm thinking about changing:
- **CPU**: I have an i5-12600k right now. Would switching to an i7-12700k or i9-12900k actually improve my gaming performance? I've seen benchmarks that suggest any gains would be minimal—maybe 10% at most with the 12900k.
- **GPU**: I'm using a 3070 Founders edition, which is starting to struggle with newer AAA games since it's only got 8GB of VRAM. At the same time, I've had to lower graphics settings due to CPU limitations, so I'm concerned that if I upgraded to something like a 5070 or 5070ti, I'd be bottlenecked by my CPU anyway.
- **RAM**: I've got 32GB of DDR4 running at 3200MHz. My motherboard can't handle more than that without crashing—thanks to a recent memory leak issue from a game that pushed me to upgrade from 16GB.
Lastly, my PSU is an SF750, so power supply won't be a problem for any new hardware.
4 Answers
It seems like your GPU is more likely the bottleneck since lowering graphics increases FPS. Upgrading to a newer GPU would be the best bet. Your current CPU should still handle a 5070 Ti pretty well for 1440p gaming.
If you're looking at a 50 series GPU, I’d recommend pairing it with at least a 13th or 14th gen Intel CPU. Honestly, moving from a 12600k to a 12700k or 12900k doesn’t seem worth the upgrade. A 14700k is only slightly more expensive than a 12900k and could offer better performance.
To your question about CPU gains—it's game-dependent but usually, going up in cores won't really make a huge difference. Also, keep in mind that VRAM is on the GPU, which doesn’t directly affect your CPU’s workload. Reducing graphics can actually stress the CPU more, so it seems like a GPU upgrade would be the right move for you.
I think the 12600k and 3070 make a solid team. Reducing graphic settings may actually increase CPU load by making it work harder to push out more frames. You might be running into GPU limitations instead. An upgrade to a 5070 could definitely help you. By the way, your RAM speed (3200 MHz) shouldn’t heavily affect your performance, especially if it isn’t running stock speeds.
Totally agree! I doubt the RAM is your concern, especially since you've already upgraded. Just make sure to mention that you switched from 16GB to 32GB in case someone suggests enabling XMP.

Good to know that your motherboard supports 13th and 14th gen CPUs! Just remember you'll likely need to do a firmware update.