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Quick Answer
The RTX 4070 can handle 4K gaming in less demanding titles and with DLSS enabled. Without DLSS, it averages 35-55 fps at 4K Ultra in demanding games. With DLSS Quality, many games hit 60+ fps. It is a capable 4K entry card but not ideal for native 4K Ultra.
The RTX 4070's 12GB VRAM is adequate for 4K in most titles today, but some games already request 14-16GB at 4K Ultra textures. You may need to lower texture settings in the most demanding titles.
The RTX 4070 is a "4K light" card. It handles esports and medium-demand titles at 4K natively. For the latest AAA games, you need DLSS. For a true dedicated 4K experience without compromise, the RTX 4080 Super or 4090 is what you need.
Our Verdict
The RTX 4070 can game at 4K with DLSS but it is not a dedicated 4K GPU. For the best 4K experience, upgrade to the RTX 4080 Super. The RTX 4070 is optimized for 1440p, where it excels.
For the RTX 4070, 1440p 144Hz is the better choice. This GPU delivers 70-100 fps at 1440p, taking full advantage of a high-refresh monitor. At 4K, it averages 40-55 fps in demanding titles, falling short of a smooth 60 fps target in many games.
The best 1440p GPU under $800 AUD is the RX 7800 XT at around $620 AUD. It delivers outstanding 1440p performance with 16GB VRAM for future-proofing. The RTX 4070 at $750 AUD is the alternative if you value DLSS 3 and ray tracing.
The RTX 4090 is 30-40% faster than the RTX 4080 at 4K but costs 70-80% more. The 4080 delivers 55-75 fps at 4K Ultra in most games, while the 4090 pushes 75-105 fps. For 4K 60fps gaming, the 4080 is sufficient. For 4K 120fps, only the 4090 delivers.