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Quick Answer
Yes, 750W is enough for the RTX 4070 Ti and 7800X3D. This system draws approximately 380-420W under full gaming load. A 750W 80+ Gold PSU provides ample headroom and handles power transients safely.
The RTX 4070 Ti can produce brief power spikes up to 320W during intense scenes. A quality 750W PSU handles these transients without triggering overcurrent protection. Cheaper units may struggle, so invest in a reputable brand.
The 7800X3D is one of the most power-efficient gaming CPUs. Despite its incredible performance, it draws 30-40W less than an i7-14700K under gaming load. This keeps total system power manageable for a 750W PSU.
Our Verdict
750W is the perfect wattage for the RTX 4070 Ti + 7800X3D. You have plenty of headroom and efficiency. Do not overspend on 850W unless you plan to upgrade to a significantly more power-hungry GPU.