Thief

Thief’s measured performance with the AMD Ryzen 5 8400F and AMD Radeon RX 6600 shows a combination that is clearly GPU-bound at higher resolutions, yet surprisingly capable at 1080p. The data indicates that while the RX 6600 handles the game’s load at 1080p with ease, the transition to 4K exposes its limitations, with frame rates dropping below the 60 FPS threshold at most settings. This pairing ranks in the lower-mid tier of tested combos for this title, but the CPU’s strong multi-threaded capabilities ensure that it is never the bottleneck.

Resolution Scaling

The performance drop from 1920x1080 to 3840x2160 is steep and consistent across all settings, pointing directly to the GPU as the limiting component. At Low settings, the average frame rate falls from 141.5 FPS at 1080p to 60.8 FPS at 4K, a reduction of 57%. The pattern holds at Medium, where it drops from 107.6 FPS to 42.6 FPS, and at High, where it falls from 80.1 FPS to 34.8 FPS. Even at Ultra, the frame rate nearly halves, going from 79.4 FPS down to 32.7 FPS.

This scaling behavior is classic for a system where the graphics card’s pixel throughput becomes the wall. The RX 6600’s 64 ROPs and 159.4 GPixel/s pixel rate are simply insufficient for the 8.3 million pixels of 4K, especially with the game’s lighting and shadow effects enabled. The CPU, on the other hand, has ample headroom; its performance does not degrade with resolution, meaning the 25% drop from 1080p to 1440p and the additional 40% drop from 1440p to 4K are entirely attributable to the GPU’s rendering limits. The data suggests that 1440p is the practical ceiling for this combo if aiming for 60 FPS, and even then, only at Low settings.

How This Combo Ranks

In Thief, this specific CPU-GPU combination ranks 1332 out of 1642 tested combos, placing it in the 19th percentile of all configurations. This is a low ranking, but it is important to contextualize it against the component specs. The rank reflects the GPU’s mid-range standing more than the CPU’s. The RX 6600 sits at the 69th percentile among all GPUs, with an average benchmark score of 25235, putting it on par with the AMD Radeon 890M (0% delta) and slightly behind the AMD Radeon RX 580 2048SP (-0.2%).

The CPU, however, is a stronger performer. The Ryzen 5 8400F holds the 82nd percentile among all CPUs, with an average benchmark score of 25064, which is nearly identical to the AMD Ryzen 7 2700X (0% delta) and slightly ahead of the AMD Ryzen 5 7500F (0.3% delta). The discrepancy between the CPU’s high percentile and the combo’s low rank in Thief underscores that the game’s engine is heavily dependent on GPU rasterization. The combo’s low position is not a sign of a weak processor, but rather a reflection of the RX 6600’s position as a 1080p-class card being pushed beyond its comfort zone.

CPU Role

The AMD Ryzen 5 8400F brings six cores and twelve threads to the table, built on the Zen 4 architecture with a 4.20 GHz base clock and a 4.70 GHz boost clock. For a 2014 stealth title like Thief, this is an overwhelming amount of processing power. The game was designed for the quad-core era, and the data shows that the CPU’s multi-threaded might is largely untapped. The Cinebench R23 multi-core score of 20851 and the PassMark multi-thread score of 24530 indicate a processor that can handle far more demanding workloads than Thief presents.

The single-thread performance is equally strong, with a Cinebench R23 single-core score of 2943 and a PassMark single-thread score of 3684. This is relevant because older game engines often depend on one or two primary threads. The 8400F’s single-core strength ensures that no thread becomes a bottleneck, allowing the GPU to run at its full potential. The 16 MB of shared L3 cache and 83.2 GB/s of DDR5 memory bandwidth also contribute to smooth frame pacing, though the game’s modest requirements mean these are not stressed. In essence, the CPU is a bystander in this benchmark, providing a stable platform for the GPU to do the heavy lifting.

FAQ

Q: Can this combo run Thief at 4K with playable frame rates?

A: At 4K, the average frame rate only exceeds 60 FPS on Low settings (60.8 FPS). On Medium, High, and Ultra, it drops to 42.6, 34.8, and 32.7 FPS respectively, which are below the 60 FPS target for smooth gameplay.

Q: What is the best resolution for this CPU-GPU pairing?

A: The data shows that 1920x1080 is the optimal resolution. At 1080p, all settings produce frame rates well above 60 FPS, with even the Ultra preset achieving 79.4 FPS. This indicates a fully playable experience at the highest quality.

Q: How does the Ryzen 5 8400F compare to its nearest rivals in processing power?

A: The CPU’s average benchmark score of 25064 is virtually identical to the AMD Ryzen 7 2700X (25057) and AMD Ryzen AI 5 PRO 340 (25099), with delta percentages of 0% and -0.1%, respectively. It is a hair faster than the AMD Ryzen 5 7500F, which scores 24993 (0.3% delta).

Q: Is the GPU the limiting factor in this system for Thief?

A: Yes. The frame rate drops dramatically from 1080p to 4K, while the CPU has ample headroom. The GPU’s 8 GB VRAM and 224.0 GB/s bandwidth are sufficient for the game’s textures, but its raw compute power (8.928 TFLOPS) is what holds back 4K performance.

Q: What is the performance difference between the Low and Ultra presets at 1440p?

A: At 2560x1440, the Low preset averages 97.1 FPS, while the Ultra preset averages 52.5 FPS. This represents a 46% reduction in frame rate for the highest quality settings.

Q: Does the CPU’s boost clock significantly affect in-game performance?

A: Given that the CPU is not the bottleneck at any resolution, the 4.70 GHz boost clock does not directly translate to higher FPS. The limiting factor is the GPU, so CPU clock speed has minimal impact on the measured results.

GPU Role

The AMD Radeon RX 6600 is the decisive component in this configuration. With a boost clock of 2491 MHz and a game clock of 2044 MHz, it delivers a peak FP32 performance of 8.928 TFLOPS. The 8 GB of GDDR6 memory on a 128-bit bus provides 224.0 GB/s of bandwidth, which is adequate for Thief’s textures but not for high-resolution rendering. The GPU’s 64 ROPs are the primary constraint at 4K, limiting the pixel fill rate to 159.4 GPixel/s.

The benchmark data confirms this analysis. At 1080p, the RX 6600 is able to flex its muscles, delivering 141.5 FPS at Low and 80.1 FPS at High. The game’s settings scale predictably: Medium offers 107.6 FPS, and Ultra drops to 79.4 FPS. This shows the GPU is well-matched for 1080p gaming. However, at 4K, the GPU’s limitations are stark. The Ultra preset yields only 32.7 FPS, and even the Low preset barely reaches 60.8 FPS. The GPU’s 69th percentile ranking among all GPUs, with an average benchmark score of 25235, places it slightly above the AMD Radeon 890M (0% delta) and below the AMD Radeon RX 580 2048SP (-0.2%). For Thief, the RX 6600 is a solid 1080p performer that struggles beyond that resolution.

Settings Recommendations

For the best experience, the data points to 1920x1080 with the Ultra preset. This configuration yields an average of 79.4 FPS, which is well above the 60 FPS smoothness threshold and provides the highest visual fidelity. If a higher frame rate is desired, the High preset at 1080p offers 80.1 FPS, nearly identical performance with slightly reduced settings. Medium at 1080p provides a significant boost to 107.6 FPS, making it ideal for competitive play or high-refresh-rate monitors.

At 2560x1440, the situation changes. The Low preset is the only one that maintains a comfortable margin above 60 FPS, averaging 97.1 FPS. Medium at 1440p falls to 77.2 FPS, which is still acceptable, but High (57.3 FPS) and Ultra (52.5 FPS) dip below the 60 FPS line. For 4K, only the Low preset is viable, hitting 60.8 FPS, but this sacrifices too much visual quality. The recommendation is clear: 1080p Ultra for the best balance of quality and performance, or 1440p Low for a sharper image at the cost of detail.

Measured FPS Breakdown

The measured FPS data provides a complete picture of this combo’s capabilities across resolutions and settings.

At 1920x1080, the frame rates are consistently high. The Low preset averages 141.5 FPS, Medium averages 107.6 FPS, High averages 80.1 FPS, and Ultra averages 79.4 FPS. The gap between High and Ultra is minimal, suggesting that the Ultra preset’s additional effects are not heavily taxing the GPU at this resolution.

At 2560x1440, the performance drops off. Low averages 97.1 FPS, Medium averages 77.2 FPS, High averages 57.3 FPS, and Ultra averages 52.5 FPS. The step from Medium to High represents a 26% reduction, indicating that the GPU is beginning to struggle with the increased pixel count.

At 3840x2160, the frame rates fall below playable levels for most settings. Low averages 60.8 FPS, Medium averages 42.6 FPS, High averages 34.8 FPS, and Ultra averages 32.7 FPS. The difference between High and Ultra is only 2.1 FPS, showing that the GPU is completely saturated at this resolution, with the bottleneck being the pixel fill rate and shading units. This data confirms that the RX 6600 is a 1080p-class card, with 1440p feasible only at lower settings and 4K reserved for the Low preset alone.