Thief

The data for Thief on the Intel Core i5-12400 with the AMD Radeon RX 6600 reveals a configuration that scales predictably with resolution, with the GPU becoming the primary constraint at higher pixel counts. The measured frames per second (FPS) across the three tested resolutions show a clear pattern: the gap between Low and Ultra settings widens as resolution decreases, indicating where the system's headroom lies.

Resolution Scaling

The performance drop from 1080p to 4K is steep and consistent with a GPU-bound scenario. At 1080p with Low settings, the system produces 139.9 FPS, but at 4K Low, it falls to 56.3 FPS—a reduction of 83.6 FPS, or roughly 60% lower performance. The Ultra preset tells a similar story: 76.7 FPS at 1080p drops to 33.1 FPS at 4K, a 43.6 FPS decline. This scaling suggests that the Radeon RX 6600's compute and memory bandwidth are the limiting factors at higher resolutions, rather than the CPU.

The intermediate resolution of 1440p offers a middle ground. At High settings, the system delivers 55.6 FPS, which is 27.0 FPS lower than 1080p High (82.6 FPS) but 22.3 FPS higher than 4K High (33.3 FPS). The proportional drop from 1440p to 4K is larger than from 1080p to 1440p, indicating that the GPU's 224.0 GB/s memory bandwidth and 8 GB GDDR6 frame buffer become progressively more strained as pixel count increases. For instance, moving from 1440p Medium (72.7 FPS) to 4K Medium (42.1 FPS) loses 30.6 FPS, while the 1080p to 1440p transition at Medium only loses 33.8 FPS—a similar absolute number but a smaller percentage of the starting value.

The data also shows that the CPU keeps pace even at low resolutions. At 1080p Low, the 139.9 FPS result is well above the 60 FPS target, and the i5-12400's 6 cores and 12 threads with a boost clock of 4.40 GHz appear sufficient to feed the GPU without introducing a bottleneck. If the CPU were the limiting factor, the FPS would plateau across resolutions; instead, it scales downward consistently, confirming the GPU's dominant role.

Settings Recommendations

Based on the measured rows, the optimal balance between visual quality and frame rate depends on the target resolution. At 1080p, the High preset delivers 82.6 FPS, which is smooth for most displays, while Ultra reduces this to 76.7 FPS—a modest 5.9 FPS penalty for higher visual fidelity. Given the small difference, Ultra at 1080p is a viable choice for users prioritizing image quality, as the system maintains a comfortable margin above 60 FPS.

At 1440p, the situation tightens. High yields 55.6 FPS, which is below the 60 FPS threshold but still playable. Medium, at 72.7 FPS, provides a better experience for fluid motion, with only a slight reduction in visual detail compared to High. The data suggests that Medium is the recommended preset for 1440p, as it offers a 17.1 FPS advantage over High while staying within the GPU's capabilities. Ultra at 1440p drops to 52.2 FPS, which is likely too demanding for consistent smoothness.

For 4K, the measured results are marginal. Low settings produce 56.3 FPS, which is the only preset that approaches acceptable playability, while Medium (42.1 FPS) and High (33.3 FPS) fall short of the 60 FPS ideal. Users targeting 4K should accept Low settings or reduce the resolution to 1440p for a better experience. The jump from Low to Medium at 4K costs 14.2 FPS, which is significant given the already low baseline.

GPU Role

The Radeon RX 6600's specifications directly explain its performance profile in Thief. The GPU features 8 GB of GDDR6 memory on a 128-bit bus, yielding 224.0 GB/s of bandwidth. This bandwidth is a critical resource at high resolutions, where texture and geometry data demands increase. The measured FPS drop from 1080p to 4K aligns with the bandwidth limitation, as the memory subsystem must service more pixels per frame.

The GPU's clock behavior also matters. The base clock is 1626 MHz, with a game clock of 2044 MHz and a boost clock of 2491 MHz. The boost clock is 865 MHz higher than the base, indicating significant thermal and power headroom for sustained performance. In Thief, the GPU's 1792 shading units and 64 ROPs handle the rendering workload, with a pixel rate of 159.4 GPixel/s. At 4K, the 33.1 FPS on Ultra suggests that the pixel throughput is near its effective limit, as the GPU must process 8.3 million pixels per frame.

The GPU's percentile ranking at 69 among all GPUs and its average benchmark score of 25235 place it in the mid-range tier. Its nearest rival, the AMD Radeon RX 580 2048SP, scores 25287, a delta of -0.2%, indicating near-identical average performance. However, in Thief, the RX 6600's RDNA 2.0 architecture with DirectX 12 Ultimate support likely provides better feature efficiency. The 8 GB frame buffer is sufficient for 1080p and 1440p, but the 4K results suggest that memory capacity is not the bottleneck—bandwidth is.

FAQ

Q: Can this system run Thief at 60 FPS on High settings at 1080p?

A: Yes. The measured average FPS at 1920x1080 with High settings is 82.6 FPS, which is well above the 60 FPS target.

Q: What is the best settings preset for 1440p gaming?

A: Medium is recommended, as it delivers 72.7 FPS, which is smoother than High's 55.6 FPS and still visually acceptable. Ultra at 1440p drops to 52.2 FPS.

Q: How does the RX 6600 compare to its nearest rival in average benchmark score?

A: The AMD Radeon RX 6600 has an average benchmark score of 25235, which is nearly identical to the AMD Radeon RX 580 2048SP's 25287, a delta of -0.2%.

Q: Is the CPU a bottleneck at 1080p Low settings?

A: No. The system achieves 139.9 FPS at 1080p Low, indicating the i5-12400 can feed the GPU effectively. The FPS scales downward with resolution, confirming the GPU is the limiting component.

Q: What is the performance difference between 1080p and 4K at Ultra settings?

A: The average FPS drops from 76.7 at 1080p to 33.1 at 4K, a reduction of 43.6 FPS, or approximately 57% lower performance.

Q: Does the GPU have enough VRAM for 4K Ultra?

A: The 8 GB frame buffer is sufficient for the game's demands, as the 4K Ultra result of 33.1 FPS is limited by memory bandwidth (224.0 GB/s) rather than capacity.

CPU Role

The Intel Core i5-12400's specifications align with the performance observed in Thief. With 6 cores and 12 threads, a base clock of 2.50 GHz, and a boost clock of 4.40 GHz, the CPU provides ample single-thread performance for a stealth game that likely relies on AI and physics calculations. The 3dmark single-thread score of 910 and passmark single-thread score of 3456 indicate strong per-core capability, which is crucial for maintaining high frame rates in scenarios where the GPU is not the bottleneck.

The CPU's cache hierarchy—80 KB L1 per core, 1.25 MB L2 per core, and 18 MB shared L3—supports efficient data access for game logic. The Cinebench R23 multicore score of 15935 reflects the CPU's overall throughput, but Thief's engine appears to scale well with the 12 threads, as evidenced by the 139.9 FPS result at 1080p Low. The CPU's percentile ranking at 77 among all CPUs, with an average benchmark score of 19850, places it slightly above the Intel Core i7-9700 (19831, delta 0.1%) and below the Intel Core i7-8700 (19894, delta -0.2%). This tight grouping suggests that the i5-12400's gaming performance is competitive with older i7 parts.

In Thief, the CPU's role becomes more apparent at lower resolutions. At 1080p, the GPU has spare capacity, so the CPU must keep up with frame generation. The 139.9 FPS at Low settings demonstrates that the i5-12400 can sustain high frame rates. However, as resolution increases to 1440p and 4K, the GPU's workload grows, and the CPU's contribution diminishes—the FPS differences between Low and Ultra at 4K (56.3 vs 33.1) are purely GPU-driven. The 65 W TDP and 10 nm process node also suggest efficient power delivery, which helps maintain boost clocks over extended sessions. The CPU's support for DDR4 and DDR5 memory, while not directly measured in FPS, provides flexibility for system builders, though the memory bandwidth is not a limiting factor in these results.