Thief

# How This Combo Ranks

The Intel Core i5-10400F paired with the AMD Radeon RX 7900 XT ranks 819th out of 1642 tested combos for Thief, placing it squarely in the middle of the database. This mid-pack positioning is somewhat surprising given the GPU's raw compute strength, but it reflects the game's age and its tendency to favor CPU throughput at lower resolutions. The combo's percentile ranking for the GPU alone is 82nd percentile among all GPUs, while the CPU sits at the 73rd percentile among all CPUs. The discrepancy between these two percentiles suggests the i5-10400F is the constraining factor in this pairing, a conclusion reinforced by the measured FPS scaling across resolutions. In practical terms, this combo delivers playable frame rates at all tested settings, but it does not dominate the leaderboard the way the GPU's raw benchmark scores might suggest.

# GPU Role

The Radeon RX 7900 XT brings substantial hardware to this 2014 stealth title. It features 20 GB of GDDR6 memory on a 320-bit bus, yielding 800.0 GB/s of memory bandwidth. The GPU's clock behavior is notable: a base clock of 1387 MHz, a game clock of 2025 MHz, and a boost clock of 2394 MHz. With 5376 shading units, 336 TMUs, and 192 ROPs, the card is massively overprovisioned for a game of Thief's era. The 51.48 TFLOPS FP32 compute figure and 459.6 GPixel/s pixel rate mean the GPU is never the bottleneck in this title, even at 4K Ultra. The card's 82nd percentile ranking among all GPUs, with an average benchmark score of 38358, places it in the upper echelon of graphics hardware. Its nearest rivals in the benchmark database include the NVIDIA GeForce RTX 5080 Mobile (deltaPct 0), NVIDIA CMP 70HX (deltaPct 0.3), and NVIDIA GeForce RTX 4080 Mobile (deltaPct 0.6), indicating the 7900 XT is statistically tied with these high-end parts in raw compute.

# Resolution Scaling

The measured FPS data reveals a clear pattern of GPU headroom being wasted by CPU limitations. At 1080p Low, the combo achieves 122.9 FPS, while at 4K Low it drops to 91.9 FPS — a decline of only 25.2% despite a 4x increase in pixel count. This relatively modest scaling drop indicates the CPU is the primary limiter at lower resolutions. The story changes somewhat at higher settings: at 1080p Ultra, the combo hits 98.6 FPS, dropping to 61.7 FPS at 4K Ultra — a 37.4% reduction. Even at 4K Ultra, the GPU is still delivering over 60 FPS, which suggests the RX 7900 XT has more to give if paired with a stronger processor. The gap between Low and Ultra settings at the same resolution is telling: at 1080p, the spread is 24.3 FPS (from 122.9 to 98.6), while at 4K the spread is 30.2 FPS (from 91.9 to 61.7). This widening gap at higher resolution confirms that the GPU becomes more relevant as pixel count rises, but the CPU still holds the combo back from fully utilizing the GPU's capabilities.

# FAQ

Q: What is the best resolution to play Thief with this combo?

A: The data shows 1440p offers the best balance. At 1440p High, the combo delivers 90.5 FPS, which is only 11.9 FPS less than 1080p High (102.4 FPS) but a substantial 25.2 FPS more than 4K High (65.3 FPS). The jump from 1440p to 4K costs more performance than the jump from 1080p to 1440p.

Q: How does this CPU compare to its nearest rivals?

A: The Intel Core i5-10400F has an average benchmark score of 14168. Its nearest rival, the AMD EPYC 7552, scores 14115 (deltaPct 0.4), meaning the i5 is slightly ahead. The AMD Ryzen 3 7320C scores 14277 (deltaPct -0.8), and the Intel Core i5-8500 scores 14332 (deltaPct -1.1), both slightly ahead of the 10400F.

Q: Is the RX 7900 XT overkill for Thief?

A: Benchmark results indicate yes. Even at 4K Ultra, the combo produces 61.7 FPS, which is above the 60 FPS threshold. At 1080p Low, it reaches 122.9 FPS. The GPU's 82nd percentile ranking and 38358 average benchmark score far exceed what this 2014 title requires, suggesting the CPU is the limiting factor.

Q: What is the GPU's memory configuration and why does it matter?

A: The RX 7900 XT has 20 GB of GDDR6 memory with 800.0 GB/s bandwidth. For Thief, this is excessive — the game does not appear to stress memory capacity based on the FPS data. The bandwidth does help at 4K Ultra, where the combo still maintains 61.7 FPS, but the GPU's 320-bit bus and 2500 MHz memory clock are far beyond what this game needs.

Q: How does the CPU's multi-threading affect performance?

A: The i5-10400F has 6 cores and 12 threads, with a base clock of 2.90 GHz and boost of 4.30 GHz. In 3DMark tests, it scores 4748 with 16 threads and 688 single-threaded. Thief appears to be more sensitive to single-thread performance, as the single-thread score of 688 is relatively low, which likely contributes to the CPU bottleneck seen at lower resolutions.

Q: What is the combo's overall rank and what does it mean?

A: The combo ranks 819th out of 1642 tested combinations for Thief. This places it in the 49.9th percentile of all tested combos. While the GPU is in the 82nd percentile, the CPU's 73rd percentile drags the overall ranking down, confirming the pairing is unbalanced for this title.

# Settings Recommendations

The measured FPS data provides clear guidance for optimal settings. At 1080p, the Ultra preset delivers 98.6 FPS, while Low delivers 122.9 FPS — a difference of 24.3 FPS. Given that Thief is a stealth game where smoothness matters more than graphical fidelity, the High preset at 1080p (102.4 FPS) represents the sweet spot: it provides most of the visual quality of Ultra while maintaining a comfortable frame rate buffer. At 1440p, the High preset (90.5 FPS) is the best choice, as it stays well above 60 FPS while the Ultra preset (90.9 FPS) offers nearly identical performance with marginally better visuals. At 4K, the Medium preset (80.5 FPS) is the recommended pick, as it provides a significant improvement over High (65.3 FPS) and Ultra (61.7 FPS), keeping the frame rate comfortably above 60 FPS. The Low preset at 4K (91.9 FPS) is not recommended because the visual downgrade is substantial relative to the performance gain.

# CPU Role

The Intel Core i5-10400F is a 6-core, 12-thread processor from the Comet Lake architecture, built on Intel's 14 nm process. It has a base clock of 2.90 GHz and a boost clock of 4.30 GHz, with 12 MB of shared L3 cache and 256 KB L2 cache per core. The CPU's 65 W TDP indicates a modest power envelope, and its DDR4 memory support with 42.7 GB/s bandwidth is standard for its generation. In synthetic benchmarks, the i5-10400F scores 10297 in Cinebench R23 multi-core and 1453 in single-core, with a Geekbench multi-core score of 5783 and single-core of 1454. The 73rd percentile ranking among all CPUs, with an average benchmark score of 14168, places it as a solid mid-range processor. Its nearest rivals include the AMD EPYC 7552 (deltaPct 0.4), AMD Ryzen 3 7320C (deltaPct -0.8), and Intel Core i5-8500 (deltaPct -1.1), showing it performs within 1.2% of these parts. The CPU's role in Thief is critical at lower resolutions: the 122.9 FPS at 1080p Low versus 91.9 FPS at 4K Low demonstrates that the CPU is the primary bottleneck, as the GPU has ample headroom at 1080p.

# Measured FPS Breakdown

At 1920x1080, the combo delivers its highest frame rates. Low settings produce 122.9 FPS, Medium 110.3 FPS, High 102.4 FPS, and Ultra 98.6 FPS. The spread from Low to Ultra is 24.3 FPS, indicating that even at the highest settings, the CPU is holding the GPU back — the RX 7900 XT should theoretically push far beyond 100 FPS at 1080p given its 51.48 TFLOPS compute capability.

Moving to 2560x1440, the performance remains strong. Low settings yield 112.3 FPS, Medium 100 FPS, High 90.5 FPS, and Ultra 90.9 FPS. Notably, the High and Ultra presets are nearly identical (90.5 vs 90.9 FPS), suggesting the game's Ultra preset adds little GPU load over High at this resolution. The drop from 1080p to 1440p at Low settings is 10.6 FPS (from 122.9 to 112.3), a relatively small penalty that further confirms CPU limitation.

At 3840x2160, the GPU finally begins to show its workload. Low settings produce 91.9 FPS, Medium 80.5 FPS, High 65.3 FPS, and Ultra 61.7 FPS. The 4K Ultra result of 61.7 FPS is just above the 60 FPS threshold, and the drop from 1440p Ultra (90.9 FPS) to 4K Ultra (61.7 FPS) is 29.2 FPS — the largest resolution penalty observed. This indicates that at 4K, the GPU becomes the limiting factor, though the CPU still contributes to the performance ceiling. The complete data shows a consistent pattern: the combo is CPU-bound at 1080p, partially CPU-bound at 1440p, and GPU-bound at 4K, with all settings remaining playable.