Thief

Resolution Scaling — how FPS drops from 1080p to 4K and what it says about the limiting component

The measured FPS data for Thief reveals a clear and predictable scaling pattern as resolution increases, but the shape of that curve tells an interesting story about where the bottleneck lies. At 1080p with Low settings, the combo delivers 181.5 FPS, which drops to 162 FPS at 1440p and then to 95.3 FPS at 4K. That represents a 47.5% drop from 1080p to 4K at Low settings, a substantial hit that points toward the GPU becoming increasingly stressed as pixel count rises.

Moving to High settings, the pattern shifts. At 1080p, the average is 138.5 FPS. At 1440p, it falls to 97.1 FPS, and at 4K it reaches 52.5 FPS. The percentage drop from 1080p to 1440p here is roughly 30%, while the drop from 1440p to 4K is about 46%. This accelerating decline as resolution increases is the classic signature of a GPU-bound scenario at higher resolutions — the RX 6800 XT's rendering workload scales with pixel count, and the CPU's role diminishes.

The Ultra preset shows a similar trajectory: 131.6 FPS at 1080p, 89.4 FPS at 1440p, and 52.4 FPS at 4K. Notably, the gap between High and Ultra at 4K is almost nonexistent (52.5 vs 52.4 FPS), which suggests that at 4K, the GPU is already saturated and additional settings complexity barely moves the needle. At 1080p, however, the gap between High and Ultra is only 6.9 FPS, indicating that the CPU can still feed the GPU adequately at lower resolutions but the GPU becomes the wall at 4K.

The data implies that at 1080p, the system is not purely GPU-limited. The jump from Low to Medium at 1080p only costs 14.6 FPS (181.5 to 166.9), and from Medium to High another 28.4 FPS. This gradual degradation suggests the CPU has headroom to spare at 1080p, but the GPU's rendering capacity is the primary constraint as resolution climbs. At 4K, the Low-to-Ultra span is 42.9 FPS (95.3 to 52.4), which is a much tighter band relative to the absolute values, reinforcing that the GPU is the dominant limiter at 4K.

GPU Role — VRAM, clocks, and how they relate to this game's results

The AMD Radeon RX 6800 XT brings substantial hardware to Thief, and the benchmark results reflect that capability. Built on the RDNA 2.0 architecture with a 7 nm process, this GPU features 16 GB of GDDR6 memory on a 256-bit bus, delivering 512.0 GB/s of bandwidth. Its boost clock reaches 2250 MHz, with a game clock of 2015 MHz, and the chip packs 4608 shading units, 288 TMUs, and 128 ROPs. The FP32 throughput is 20.74 TFLOPS, which provides ample raw compute for a 2014 title like Thief.

The 16 GB VRAM is far more than Thief requires, even at 4K Ultra. The game's release date of 2014-02-24 means it was designed for GPUs with a fraction of this memory capacity. Consequently, the data shows no VRAM-related stutter or performance cliff at any resolution or settings combination. The measured FPS at 4K Ultra is 52.4, which is playable but not smooth by modern standards, and the limitation is not memory capacity but rather the GPU's shading and rasterization throughput.

The GPU's 87th percentile ranking among all GPUs in the database places it above the majority of tested hardware. Compared to its nearest rivals, the RX 6800 XT's average benchmark score of 49982 is 0.5% below the Intel Arc A550M (49737), 1.7% below the NVIDIA RTX A1000 (50826), 1.9% above the NVIDIA CMP 50HX (49071), and 2.6% above the NVIDIA GeForce RTX 4070 Ti SUPER (48704). These are tight margins, suggesting the RX 6800 XT is competitively positioned, though not dominant.

In Thief specifically, the GPU's role becomes more pronounced as resolution increases. At 1080p Low, the 181.5 FPS result indicates the GPU is not the limiting factor — the CPU and memory subsystem can keep up. But at 4K Ultra, the 52.4 FPS figure shows the GPU is working near its limits. The pixel rate of 288.0 GPixel/s and texture rate of 648.0 GTexel/s are the specs that matter most for a game like Thief, which relies heavily on texture detail and shadow rendering. The data shows that at 4K, the GPU's pixel throughput becomes the bottleneck.

CPU Role — cores, clocks, and how they relate to this game's results

The AMD Ryzen 5 8400F is a 6-core, 12-thread processor based on the Zen 4 architecture, codenamed Phoenix, manufactured on a 4 nm process by TSMC. Its base clock is 4.20 GHz with a boost clock of 4.70 GHz, and it has 16 MB of shared L3 cache along with 1 MB of L2 per core. The CPU's 82nd percentile ranking among all CPUs indicates it performs well above average, though its average benchmark score of 25064 places it within a fraction of several rivals.

Looking at the nearest rivals, the Ryzen 5 8400F is essentially tied with the AMD Ryzen 7 2700X (25057, 0% delta), the AMD Ryzen AI 5 PRO 340 (25099, -0.1% delta), and the AMD Ryzen 5 7500F (24993, 0.3% delta). The AMD EPYC 9474F is also close at 25103 (-0.2% delta). This tight clustering suggests the 8400F's computational throughput is well-matched to its peers, and Thief's performance will depend more on the GPU at higher resolutions.

Thief is a 2014 title that was not designed for multi-core CPUs. The game's engine typically utilizes only one or two threads effectively, which means the 8400F's 6 cores and 12 threads are mostly idle during gameplay. The single-thread performance, as measured by the 3DMark single-thread score of 951 and Cinebench R23 single-core score of 2943, is what matters most for this game's frame pacing. The boost clock of 4.70 GHz provides the raw single-thread speed needed to avoid CPU bottlenecks at lower resolutions.

At 1080p Low, the 181.5 FPS result suggests the CPU can keep up with the GPU's output. The data shows that at 1080p, the gap between Low and Ultra is 49.9 FPS (181.5 vs 131.6), which is significant but not catastrophic. This indicates that the CPU is not the primary limiter at 1080p — if it were, the settings changes would have a smaller impact. At 4K, the CPU's role diminishes further, as the GPU becomes the constraint. The 8400F's memory bandwidth of 83.2 GB/s and DDR5 support provide adequate data throughput for Thief's modest requirements.

FAQ

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

A: The highest measured average FPS is 181.5 at 1920x1080 with Low settings. This is the peak performance point in the dataset.

Q: How does the combo perform at 4K Ultra settings?

A: At 3840x2160 with Ultra settings, the average FPS is 52.4. This is the lowest measured result and indicates the GPU is heavily loaded at this resolution and preset.

Q: Is the CPU or GPU the limiting factor at 1440p High settings?

A: At 2560x1440 with High settings, the average FPS is 97.1. The data shows a significant drop from 1080p High (138.5 FPS), suggesting the GPU becomes the primary constraint as resolution increases, though the CPU still has enough single-thread headroom to avoid being the bottleneck.

Q: How does the RX 6800 XT compare to the RTX 4070 Ti SUPER in overall benchmark scores?

A: The RX 6800 XT has an average benchmark score of 49982, which is 2.6% higher than the NVIDIA GeForce RTX 4070 Ti SUPER's 48704 score.

Q: What is the FPS difference between Low and Ultra settings at 1080p?

A: At 1920x1080, the difference between Low (181.5 FPS) and Ultra (131.6 FPS) is 49.9 FPS. This shows that settings have a moderate impact at this resolution.

Q: Does the 16 GB VRAM of the RX 6800 XT ever become a limitation in Thief?

A: No. The measured data shows no performance cliffs or anomalies at any resolution or settings combination. Thief is a 2014 title with modest VRAM requirements, so the 16 GB capacity is never stressed.

How This Combo Ranks

The AMD Ryzen 5 8400F paired with the AMD Radeon RX 6800 XT achieves a rank of 453 out of 1642 tested combos in Thief. This places the combination in the top 27.6% of all tested systems, which is a solid result for a mid-range CPU paired with a high-end GPU. The rank reflects the GPU's strong performance at lower resolutions, where the CPU can keep up, and the GPU's moderate performance at 4K, where the RX 6800 XT's 16 GB VRAM and RDNA 2.0 architecture are not enough to push frame rates much above 50 FPS on Ultra.

The combo's rank is likely held back by the 4K results, where the GPU becomes the limiting factor. At 1080p and 1440p, the system delivers playable-to-excellent frame rates across all settings, with the 1080p Low result of 181.5 FPS being particularly strong. The 1440p High result of 97.1 FPS is also respectable for a demanding resolution. However, the 4K Ultra result of 52.4 FPS drags the overall ranking down, as many higher-ranked combos likely maintain higher minimum frame rates at 4K.

The CPU's 82nd percentile ranking and the GPU's 87th percentile ranking suggest both components are above average, but the combination does not reach the top tier of Thief performance. The gap between the combo's rank (453rd) and the top of the list indicates that systems with more powerful GPUs, such as those with higher FP32 throughput or more memory bandwidth, would outperform this pairing in 4K scenarios. The data shows that this combo is best suited for 1080p and 1440p gaming, where it can take full advantage of its GPU's capabilities.

Measured FPS Breakdown

At 1920x1080, the combo delivers its strongest results. Low settings produce an average FPS of 181.5, Medium settings yield 166.9 FPS, High settings reach 138.5 FPS, and Ultra settings achieve 131.6 FPS. The spread from Low to Ultra is 49.9 FPS, which is the largest absolute range across any resolution. This indicates that the GPU has headroom at 1080p and that settings have a meaningful impact on performance.

At 2560x1440, the results are still strong but show more GPU strain. Low settings average 162 FPS, Medium settings hit 121.7 FPS, High settings reach 97.1 FPS, and Ultra settings deliver 89.4 FPS. The drop from Low to Ultra is 72.6 FPS, a larger relative decrease than at 1080p, suggesting the GPU is becoming more of a limiting factor as pixel count increases.

At 3840x2160, the GPU is clearly the bottleneck. Low settings produce 95.3 FPS, Medium settings drop to 69.4 FPS, High settings fall to 52.5 FPS, and Ultra settings bottom out at 52.4 FPS. The difference between High and Ultra at 4K is a negligible 0.1 FPS, indicating that the GPU is saturated and cannot render additional settings complexity. The 4K Low result of 95.3 FPS is still playable, but the Ultra result of 52.4 FPS is marginal for smooth gameplay.

The data shows a consistent pattern: the higher the resolution, the smaller the gap between preset levels at the top end. At 1080p, the High-to-Ultra gap is 6.9 FPS. At 1440p, it is 7.7 FPS. At 4K, it is 0.1 FPS. This compression at 4K is a strong indicator of GPU saturation.

Settings Recommendations

For the best experience at 1920x1080, the data suggests that High settings at 138.5 FPS offer an excellent balance of visual quality and frame rate. The jump to Ultra only costs 6.9 FPS (to 131.6 FPS), which is negligible, so Ultra is also viable if visual fidelity is a priority. Low settings at 181.5 FPS are only useful for competitive play where maximum frame rates matter more than graphics.

At 2560x1440, High settings at 97.1 FPS provide a smooth experience, but Medium settings at 121.7 FPS offer a better margin for dips. The difference between Medium and High is 24.6 FPS, which is substantial, so users with 144 Hz monitors may prefer Medium. Ultra at 89.4 FPS is still playable, but the 7.7 FPS gain over High is minor relative to the visual cost.

At 3840x2160, the data shows that Medium settings at 69.4 FPS are the sweet spot. Low settings at 95.3 FPS are also viable, but the visual quality loss may be noticeable. High at 52.5 FPS and Ultra at 52.4 FPS are nearly identical, so there is no reason to choose Ultra over High at 4K. The negligible difference suggests the GPU is fully saturated, and any settings beyond Medium provide diminishing returns.

For the overall best experience, Medium settings at 1440p (121.7 FPS) or High settings at 1080p (138.5 FPS) appear to be the most balanced choices. The data indicates that this combo is not well-suited for 4K Ultra gaming, but it excels at 1080p and 1440p with settings that prioritize frame rate over extreme visual detail.