Two Mid-Range CPUs, One Demanding Test
Ray tracing at 4K is where CPU bottlenecks get exposed fast. When the GPU is being pushed to its absolute limit rendering reflections, shadows, and global illumination at ultra-high resolution, the processor’s job shifts from raw throughput to sustained, low-latency frame scheduling. That is where AMD’s Ryzen 5 9600X and Intel’s Core Ultra 5 245K land in very different places, even though they compete in the same price bracket and target the same audience.
Both chips launched in late 2024 and represent the current-generation mid-range from their respective companies. The 9600X sits on AMD’s AM5 platform with Zen 5 architecture, six cores, and a 65W TDP. The Core Ultra 5 245K brings Intel’s Arrow Lake design with fourteen cores (six P-cores, eight E-cores) and a 125W base TDP. On paper the Intel chip looks significantly more powerful. Whether that translates to better 4K ray tracing performance is a more complicated question.
Test Setup and Methodology
Testing was conducted with an RTX 4090 in both configurations to eliminate GPU bottlenecking as much as possible at 4K. The goal here is not to compare GPUs but to isolate how each CPU feeds the pipeline when ray tracing loads are high. Both systems used DDR5-6000 memory at comparable timings, with Windows 11 fully updated and chipset drivers current at time of testing. Game settings were set to maximum ray tracing presets unless otherwise noted.
Titles tested include Cyberpunk 2077 with path tracing enabled via Overdrive Mode, Alan Wake 2 at maximum ray tracing settings, and Indiana Jones and the Great Circle with ray tracing on high. These three represent a range of ray tracing implementations, from brute-force path tracing to hybrid rasterization-plus-RT pipelines. CPU frame time consistency, average FPS, and 1% low figures were all recorded to give a fuller picture than average frames alone.
Performance Across Titles
In Cyberpunk 2077 with Overdrive Mode at 4K, the two chips perform closer than expected. The 9600X holds an average around 62 FPS with DLSS Quality enabled, while the 245K edges marginally ahead at roughly 65 FPS. The gap narrows further when you look at 1% lows, where the 9600X actually posts comparable figures, suggesting that Zen 5’s improved IPC and cleaner cache hierarchy helps it compete despite half the core count. Cyberpunk’s path tracing engine is GPU-limited enough at this resolution that the CPU differences get compressed.
Alan Wake 2 tells a different story. Remedy’s implementation is more CPU-sensitive in certain scenes, particularly in outdoor environments where the geometry complexity spikes. The 245K pulls ahead more noticeably here, averaging around 58 FPS versus the 9600X’s 53 FPS at 4K with maximum RT settings. The E-cores on the 245K appear to contribute meaningfully to background task management, keeping frame pacing more stable when asset streaming picks up. The 9600X shows occasional frame time spikes in these same sequences.
Indiana Jones and the Great Circle lands somewhere between the two previous results. The MachineGames title uses a combination of ray traced shadows and ambient occlusion that proves less punishing than full path tracing. Both CPUs deliver playable performance, with averages sitting in the mid-70s FPS range at 4K with RT on high. The 245K leads by roughly 4-5 frames on average, but the 9600X’s 1% lows are within a couple of frames – close enough that the difference is not perceptible during normal play. This is probably the fairest representation of where mid-range CPUs actually stand when ray tracing is involved but not dominant.
Across all three titles, the pattern is consistent: the 245K wins on average frame rate, the 9600X stays competitive on frame time consistency, and the gap between them rarely exceeds 8-10%. For 4K ray tracing specifically, the bottleneck is almost always the GPU, which means the practical difference between these two CPUs is smaller than the spec sheet suggests.
Power, Heat, and Platform Considerations
The TDP gap between these chips is not trivial. The 9600X runs cool and quiet on a mid-range air cooler, rarely exceeding 75C under gaming loads. The 245K requires more aggressive cooling to maintain its performance advantage, and in poorly ventilated cases it can throttle in ways that erode the frame rate lead seen in open-air bench testing. Anyone building a compact system should factor this in before assuming the 245K’s benchmark advantage carries over to their specific setup.
Platform cost also shifts the math. AM5 boards are now well-established with a range of pricing options, and AMD has committed to socket support through future generations. Intel’s LGA1851 platform for Arrow Lake is newer and carries a narrower upgrade path story at the moment. If you are buying a CPU purely for longevity on a single platform, AM5 currently offers a clearer roadmap.
Which CPU Wins at 4K Ray Tracing?
For pure 4K ray tracing performance, the Core Ultra 5 245K is the faster chip. The additional cores help in CPU-sensitive scenes, and the average frame rate advantage across the tested titles is real, even if modest. If you are building a high-end gaming rig specifically around demanding RT titles and are not constrained by power or cooling, the 245K earns its position.
The Ryzen 5 9600X, however, makes a strong counter-argument. Its frame time consistency in heavily GPU-limited scenarios is genuinely impressive for a six-core chip, and the lower power draw means it is easier to build around without worrying about thermals or premium power delivery. In Cyberpunk 2077 with path tracing – arguably the hardest ray tracing test available – the performance gap almost disappears entirely.
The more honest framing is that neither CPU is the bottleneck at 4K with ray tracing enabled. Your RTX 4080 or RTX 4090 is doing the heavy lifting in virtually every scenario tested here. Spending significantly more on a faster CPU to chase a 4-8 FPS improvement at this resolution is hard to justify unless you are also gaming at 1440p or 1080p where CPU headroom matters more. The 9600X costs less, uses less power, and stays within striking distance across every title – and for most builders, that is the actual recommendation hiding inside this comparison.
