Thief

Thief, a 2014 stealth title, when paired with the AMD Ryzen 5 5600 and NVIDIA GeForce RTX 4090, presents a clear picture of a system that is heavily GPU-limited at higher resolutions but increasingly CPU-bound at 1080p. The measured frame rates across the three tested resolutions reveal how the balance of load shifts, with the RTX 4090's immense power being progressively constrained by the Ryzen 5 5600's processing capabilities as resolution drops. The data indicates that this combination delivers playable performance across all settings, but the headroom available at lower resolutions is where the CPU's role becomes most apparent.

Resolution Scaling

The FPS progression from 4K down to 1080p shows a classic scaling pattern, but with diminishing returns that highlight the CPU's limitations. At 4K with High settings, the system produces an average of 82 FPS. Dropping to 1440p increases this to 116.8 FPS, a significant 42.4% improvement. Moving from 1440p to 1080p yields a further increase to 131.3 FPS, but this is only a 12.4% gain. This compression of gains at lower resolutions is a direct indicator that the Ryzen 5 5600 is becoming the bottleneck.

The trend is consistent across all quality presets. At Ultra settings, the frame rates are 77.4 FPS at 4K, 115.2 FPS at 1440p, and 126.8 FPS at 1080p. The gap between 1440p and 1080p narrows to just 10.1%, whereas the gap between 4K and 1440p is substantial at 48.8%. This pattern suggests that the RTX 4090 has ample headroom to render frames at 1440p, but the 6-core processor cannot feed it data fast enough to fully utilize that headroom at 1080p.

The scaling from Low to High settings at 4K is also revealing. At 4K Low, the system achieves 117.9 FPS, but this drops to 82 FPS at High, a 30.4% decrease. This indicates that even at 4K, the GPU is still the primary limiting factor, as increasing the graphical load directly impacts performance. However, at 1080p, the Low preset hits 162.8 FPS, while High only reaches 131.3 FPS, a 19.3% drop. The smaller percentage drop at 1080p suggests that the CPU is starting to cap the maximum achievable frame rate, preventing the GPU from being the sole determinant of performance.

CPU Role

The AMD Ryzen 5 5600, with its 6 cores and 12 threads, is a Zen 3 architecture processor based on the Vermeer codename. Its base clock of 3.50 GHz and boost clock of 4.40 GHz provide the single-thread performance that Thief, a game from 2014, relies on. The benchmark data shows a single-thread score of 882 in 3dmark and 2584 in Cinebench R23 single-core, indicating robust per-core capability. The 32 MB of shared L3 cache also helps reduce memory latency, which can be beneficial in game logic.

In this game, the CPU's role is most evident in the 1080p results. The 162.8 FPS at Low settings represents a practical ceiling for this processor in Thief. The fact that the Ultra preset at 1080p only reaches 126.8 FPS, while the 1440p Ultra setting achieves 115.2 FPS, shows that the CPU is not just a simple bottleneck but actively limits the maximum frame rate. The delta between 1440p and 1080p at Ultra is only 10.1%, suggesting that the processor cannot deliver a significantly higher frame rate even when the GPU has far less work to do.

The processor's overall standing is solid, with an average benchmark score of 21765 and a percentile rank of 79 among all CPUs. Its nearest rival, the Intel Core i7-11700F, has an average score of 21957, a delta of -0.9%, meaning the Ryzen 5 5600 is slightly behind. This context is important: while the Ryzen 5 5600 is not the fastest CPU available, its performance is sufficient to drive high frame rates in this older title, but not unlimited ones. The data suggests that for Thief, the 6-core, 12-thread configuration with a 4.40 GHz boost clock is a capable but not limitless partner for the RTX 4090.

GPU Role

The NVIDIA GeForce RTX 4090 is the dominant component in this pairing, and its influence is most pronounced at 4K. With 24 GB of GDDR6X memory on a 384-bit bus, providing 1.01 TB/s of bandwidth, it has the resources to handle the highest resolutions and texture loads. Its boost clock of 2520 MHz and 16384 shading units deliver the raw compute power needed for modern rendering. In Thief, the GPU's role is to push visual fidelity, and the data confirms it does so effectively.

At 4K Ultra, the RTX 4090 still manages an average of 77.4 FPS, which is a demanding scenario for most hardware. The difference between 4K Low (117.9 FPS) and 4K High (82 FPS) is a 30.4% performance hit, showing that the GPU is being actively stressed by the higher settings. This is the expected behavior for a GPU-bound scenario. The GPU's percentile rank of 91 and average benchmark score of 66473 place it in the top tier, and its nearest rival, the AMD Radeon Pro Vega 56, has a delta of -0.9%, meaning the RTX 4090 is slightly ahead.

The GPU's VRAM capacity is not a limiting factor in Thief, even at 4K Ultra. The 24 GB buffer is far more than enough for this game's needs, meaning the performance differences are purely due to shader and texture processing, not memory capacity. The data shows that the RTX 4090 is a massive overprovision for this title, able to maintain high frame rates even at 4K, but its full potential is capped by the CPU at lower resolutions. The GPU is the clear star of the show, but it is not being allowed to run at full speed in all scenarios.

FAQ

Q: What is the maximum average FPS achievable with this CPU and GPU combo in Thief?

A: The highest measured average frame rate is 162.8 FPS, which occurs at 1920x1080 with Low settings. This represents the practical ceiling for this pairing in the game.

Q: How does the Ryzen 5 5600 compare to its closest rival in overall CPU benchmarks?

A: The Ryzen 5 5600 has an average benchmark score of 21765, which is 0.9% lower than the Intel Core i7-11700F's score of 21957. It is also 0.6% higher than the AMD EPYC 9554P, which scores 21899.

Q: Is the RTX 4090 a significant upgrade over its closest rival in GPU benchmarks?

A: The RTX 4090 has an average benchmark score of 66473, which is 0.4% higher than the NVIDIA Tesla T4's score of 66733. It is also 0.5% higher than the NVIDIA Tesla P40's score of 66127.

Q: At which resolution does the CPU start to limit performance in Thief?

A: The data shows that the frame rate gains between 1440p and 1080p are much smaller than those between 4K and 1440p. For example, at High settings, the gain from 1440p to 1080p is only 12.4%, while the gain from 4K to 1440p is 42.4%. This suggests the CPU begins to limit performance around 1440p and becomes the primary bottleneck at 1080p.

Q: Does the RTX 4090's 24 GB of VRAM provide any advantage in Thief?

A: The 24 GB VRAM buffer is far larger than what Thief requires, even at 4K Ultra settings. The measured performance differences between presets are due to GPU processing load, not memory capacity, so the VRAM is not a limiting factor in this game.

Q: How does the performance at 4K Ultra compare to 1080p Low?

A: At 4K Ultra, the system achieves 77.4 FPS, while at 1080p Low, it reaches 162.8 FPS. This represents a 110.3% performance increase from the most demanding to the least demanding tested configuration.

Settings Recommendations

Based on the measured frame rates, the optimal settings depend heavily on the target resolution. For a 4K display, the High preset at 82 FPS is the best choice, as it provides a substantial visual upgrade over Medium (109.4 FPS) while maintaining a smooth, playable frame rate. The Ultra preset at 77.4 FPS is also viable, but the 5.6% performance drop from High may not be worth the incremental visual gains.

At 1440p, the Ultra preset at 115.2 FPS is the clear recommendation. It delivers a high level of visual fidelity while still maintaining a frame rate well above 100 FPS. The High preset at 116.8 FPS is nearly identical in performance, so the choice comes down to visual preference, but Ultra offers more for the same speed.

For 1080p, the situation is more nuanced. The Ultra preset at 126.8 FPS is a smooth experience and is recommended for those who want the best visuals. However, the Low preset at 162.8 FPS provides a 28.4% performance increase, which may be preferable for high-refresh-rate displays. The Medium preset at 143.6 FPS is a solid middle ground, offering a significant performance bump over Ultra while maintaining better visuals than Low. Given the CPU's role in limiting performance at this resolution, the Medium preset appears to be the most balanced option, providing a strong frame rate without sacrificing too much graphical quality. The data shows that the RTX 4090 is underutilized at 1080p, so selecting a higher preset like Ultra is a reasonable way to leverage the GPU's power without a significant frame rate penalty.