Thief

Thief, a 2014 stealth title, provides a fascinating test bed for the Intel Core i5-12400 and AMD Radeon RX 6650 XT combination. The measured frames per second (FPS) across resolutions reveal a system that is decisively GPU-bound at higher settings, but which flirts with CPU limitations at the most extreme frame rates. The data shows a clear narrative of scaling, where the graphical load dictates performance far more than the processor's capabilities.

Resolution Scaling

The FPS data from 1080p to 4K paints a textbook picture of GPU-bound scaling. At 1080p with Low settings, the system achieves an average of 162 FPS. When the resolution jumps to 1440p at the same Low settings, the average drops to 111 FPS, a reduction of approximately 31%. Scaling further to 4K at Low settings yields a 65 FPS average, which is another 41% drop from the 1440p figure. This steep decline with increasing pixel count is the signature of a graphics card that is working progressively harder, confirming the RX 6650 XT is the primary performance arbiter at these settings.

The pattern holds, albeit with different magnitudes, across all quality presets. At High settings, the transition from 1080p (93 FPS) to 1440p (64 FPS) represents a 31% decrease, while moving from 1440p to 4K (38 FPS) is a 41% drop. The consistency of these percentages—roughly a third loss from 1080p to 1440p and another two-fifths loss from 1440p to 4K—suggests that the game's rendering load scales almost linearly with the number of pixels being processed. This is a clear indicator that the limiting component is the GPU, as the CPU's workload in this older title does not appear to be a bottleneck at these resolutions.

The Ultra preset shows the most constrained performance, with averages of 89 FPS at 1080p, 61 FPS at 1440p, and 36 FPS at 4K. The 4K Ultra result is particularly telling; it is the only configuration that dips below 40 FPS, indicating that the RX 6650 XT's 8 GB of VRAM and compute resources are simply overwhelmed by the combination of high pixel count and maximum detail settings. The data implies that while the CPU is capable of feeding the GPU at 1080p, the GPU's performance ceiling is what ultimately caps the experience at higher resolutions. The fact that the 4K High (38 FPS) and 4K Ultra (36 FPS) results are so close further suggests that the GPU is hitting a hard performance wall, irrespective of the additional graphical load.

CPU Role

The Intel Core i5-12400, with its 6 cores and 12 threads, presents a strong foundation for gaming. Its benchmark scores are respectable, with a 3DMark max threads score of 5890 and a Cinebench R23 multicore score of 15989. The data positions this CPU at the 72nd percentile against all processors, and its nearest rivals include the AMD EPYC 7643 and the Intel Core i7-1355U, with negligible performance deltas of -0.1% and -0.3%, respectively. This indicates that the i5-12400 is a very solid mid-range performer, but its role in Thief is not to push frame rates, but rather to stay out of the way.

The game's results show that the CPU is not the primary bottleneck. If the processor were the limiting factor, we would expect to see FPS remain relatively flat when the resolution is lowered. Instead, the data shows FPS skyrocketing at 1080p Low to 162 FPS. This high frame rate is a strong indicator of CPU headroom. The processor's single-thread performance, evidenced by a 3DMark single-thread score of 910 and a Geekbench singlecore score of 1848, is more than adequate to handle the game's logic and draw calls, even at these elevated frame rates. The CPU's 18 MB of shared L3 cache and 2.5 GHz base clock (boostable to 4.4 GHz) provide enough responsiveness to keep the GPU fed with data.

However, the data also hints at a potential ceiling. The jump from 4K Low (65 FPS) to 1440p Low (111 FPS) is substantial, but the subsequent jump to 1080p Low (162 FPS) is even larger in absolute terms. This suggests that while the GPU is still the main constraint, the CPU is beginning to play a larger role as the resolution drops and the GPU's workload lightens. The 162 FPS figure is likely approaching the upper limit of what this CPU can deliver in this specific game engine. The i5-12400's strong, but not extreme, multi-threading capabilities (Cinebench R15 multicore score of 1611) are sufficient for a 2014 title that likely does not leverage more than a few cores effectively.

GPU Role

The AMD Radeon RX 6650 XT is the undisputed driver of performance in this analysis. Its benchmark profile is solid, with a PassMark G3D score of 17166 and a 3DMark Steel Nomad DX12 score of 1859, placing it at the 65th percentile against all GPUs. Its nearest rivals, such as the NVIDIA Tesla K40m and AMD FirePro D300, are professional-grade cards with performance deltas of -0.6% and 0.7%, respectively, which are not directly comparable for gaming. The GPU's architecture, RDNA 2.0, with 2048 shading units and a 128-bit memory bus, is a key factor in its performance.

The measured FPS data shows the RX 6650 XT's capabilities and limitations clearly. At 1080p, it performs admirably, delivering a very playable 89 FPS on Ultra and 93 FPS on High. The 8 GB of GDDR6 memory, with a bandwidth of 280.3 GB/s, is sufficient for these settings. The GPU's boost clock of 2635 MHz and game clock of 2410 MHz are high, which helps maintain these frame rates. However, the 4K results expose its limits. The drop to 38 FPS on High and 36 FPS on Ultra suggests that the GPU is running out of raw compute power and possibly memory bandwidth. The 128-bit bus, while efficient, may struggle to feed the necessary textures to the shading units at 4K resolutions.

The data implies that the RX 6650 XT is a 1080p and 1440p champion, but a 4K contender only at lower settings. The 65 FPS average at 4K Low demonstrates that the GPU can handle the pixel count when the graphical complexity is reduced, but the 49 FPS at 4K Medium shows how quickly performance degrades as texture quality and shading effects are increased. The GPU's 10.79 TFLOPS of FP32 performance is substantial, but it is not enough to brute-force Thief's Ultra preset at 4K. The data suggests that for a smooth 4K experience, users would need to significantly lower settings, making the card more suited to high-refresh-rate 1080p or 1440p gaming.

FAQ

Q: What is the highest average FPS this combo can achieve in Thief?

A: The highest measured average FPS is 162, achieved at 1920x1080 resolution with Low settings.

Q: Is the game more dependent on the CPU or GPU for this combination?

A: The data indicates the game is firmly GPU-bound. The FPS scales dramatically with resolution changes, which is the classic sign of a GPU bottleneck. The CPU provides enough headroom to reach high frame rates at low resolutions, but the GPU's performance limits the experience.

Q: Can this setup handle 4K resolution in Thief?

A: Yes, but with compromises. At 4K with Medium settings, the average FPS is 49, which is playable. For a more stable 60 FPS, users would need to use Low settings, where the average is 65 FPS. High and Ultra settings at 4K result in averages of 38 and 36 FPS, respectively, which may not be ideal for smooth gameplay.

Q: How much performance is lost when going from 1440p to 4K at High settings?

A: The average FPS drops from 64 at 2560x1440 to 38 at 3840x2160. This represents a 26 FPS decrease, or a roughly 41% reduction in performance.

Q: What is the best resolution for a high-refresh-rate monitor?

A: For a 144Hz monitor, 1080p is the clear choice. The combo achieves 123 FPS on Medium and 162 FPS on Low at 1920x1080. At 1440p, the refresh rate would be limited to around 111 FPS on Low, or 84 FPS on Medium.

Q: How does the RX 6650 XT's 8 GB of VRAM affect performance?

A: The 8 GB of VRAM is sufficient for 1080p and 1440p gaming at all tested settings. However, the significant drop in performance at 4K High (38 FPS) and 4K Ultra (36 FPS) suggests that the memory capacity or bandwidth is a contributing factor to the GPU hitting a performance wall at that resolution.

Measured FPS Breakdown

The following table details the exact average FPS values measured for the Intel Core i5-12400 and AMD Radeon RX 6650 XT combination in Thief.

• 3840x2160 (4K)
• Ultra: 36 FPS average
• High: 38 FPS average
• Medium: 49 FPS average (min 42, max 57)
• Low: 65 FPS average

• 2560x1440 (1440p)
• Ultra: 61 FPS average
• High: 64 FPS average
• Medium: 84 FPS average (min 72, max 97)
• Low: 111 FPS average

• 1920x1080 (1080p)
• Ultra: 89 FPS average
• High: 93 FPS average
• Medium: 123 FPS average (min 104, max 141)
• Low: 162 FPS average

The data reveals a clear hierarchy. At each resolution, the Ultra preset is the most demanding, while Low is the least. The Medium preset consistently offers a significant step up from Low, and High is a small step down from Ultra. This suggests that the settings scale in a predictable manner, with the most substantial performance gains coming from dropping from High to Medium or from Ultra to High.

Settings Recommendations

Based on the measured FPS data, the optimal settings depend heavily on the target resolution and desired frame rate. For a smooth 60 FPS experience, the data points to a clear sweet spot.

At 1080p, all settings are playable. The Ultra preset, with an average of 89 FPS, is excellent for a 60Hz display and provides the best visual quality. For users with a 144Hz monitor, the Medium preset at 123 FPS is the best choice, offering a significant boost in smoothness while still maintaining high detail. The Low preset at 162 FPS is only necessary for the most competitive or high-refresh-rate (165Hz+) displays, but the visual compromise is substantial.

At 1440p, the High preset, with an average of 64 FPS, is the recommended choice for a 60Hz monitor, providing a great balance of visual fidelity and performance. The Ultra preset at 61 FPS is also viable, but the margin for error is smaller. For 144Hz displays, the Medium preset at 84 FPS is the best option, as it is the highest setting that consistently breaks the 80 FPS threshold. The Low preset at 111 FPS is an alternative for a smoother experience, but the visual downgrade is noticeable.

At 4K, the situation is more constrained. The Medium preset, with an average of 49 FPS, is the highest setting that offers a playable experience, though it will not hit 60 FPS. The Low preset at 65 FPS is the only way to achieve a stable 60 FPS at this resolution, but it sacrifices almost all graphical enhancements. The High and Ultra presets, at 38 and 36 FPS respectively, are not recommended for a smooth experience and should be avoided unless the user prioritizes visuals over gameplay fluidity. The data suggests that for this resolution, the Medium preset is the best compromise.

How This Combo Ranks

In the grand database of tested combinations, this pairing of the Intel Core i5-12400 and the AMD Radeon RX 6650 XT ranks 2383 out of 3720 total combos for Thief. The data shows that this places it in the lower-middle tier of all possible system configurations. This ranking is a direct result of the GPU's performance ceiling being a limiting factor in a game that is heavily GPU-bound. While the CPU is a strong performer, it is not the component that dictates the overall ranking.

The ranking is a holistic measure of the combo's performance across all tested resolutions and settings. The fact that the RX 6650 XT struggles at 4K and is only a mid-range performer at 1440p drags the overall score down. The i5-12400's inability to push frame rates higher at 1080p, where the GPU is already at its limit, also contributes to the ranking. The data indicates that this is a competent 1080p and entry-level 1440p gaming system, but it is not a high-end contender. It finds itself in the company of other mid-range pairings that can handle mainstream gaming but are not built for maximum fidelity or extreme resolutions. The rank of 2383 suggests that while this combo is far from the bottom, there are many more powerful and better-balanced configurations available in the benchmark database.