Is My Motherboard Limiting My PC’s Performance?

Random restarts? Yep, typically that's a PSU problem. You might want to check that out first.

Honestly, I don’t think it’s strictly a motherboard issue. The PSU is likely the culprit, or maybe you've got a degraded CPU. Intel's 13th and 14th gen processors are known for having degradation issues. I'd recommend replacing the PSU first. If the crashes continue, you may need to reach out to Intel for support regarding your CPU. Considering it's only been a month since you bought it, you might want to return it for a refund instead.

You definitely paired a high-end CPU with a low-end motherboard. The fact that you've had random restarts since you got it raises some red flags. Have you heard of the frying issue with the higher-end 13th/14th gen CPUs? While the motherboard might not provide enough power to cause damage, it could be the reason you're not fully utilizing your CPU's potential. But a month in, that would be quite unfortunate if it fried already.

It sounds like your power supply unit (PSU) could be causing the issues, too. I've seen that particular model rated low on the PSU tier list. If your motherboard was working properly, I doubt it's to blame for an expensive graphics card like the RTX5070. But seriously, I'd take a good look at that PSU first before jumping to conclusions about the motherboard.

Your motherboard isn’t really capable of supporting the power demands of the 13700K. It might run, but only at base speed, which means you're not getting anywhere near the performance you should. I'd seriously consider a motherboard upgrade, especially one with a solid power delivery system, like at least a 10-phase design.