Thief

# Thief Performance Analysis: Intel Core i5-12400 + NVIDIA GeForce RTX 5080

This combo lands at rank 508 out of 3,720 tested configurations in Thief, placing it in the top 13.7% of all measured system pairings. The ranking reflects a strong balance between a 6-core/12-thread Alder Lake processor and a Blackwell 2.0 flagship GPU. The CPU's 72nd percentile standing among all processors, combined with the GPU's 87th percentile among all graphics cards, suggests a system that should handle this 2014 stealth title with considerable headroom. The data reveals interesting scaling behaviors across resolutions and settings, with the RTX 5080's substantial compute resources interacting with a game engine that predates modern multi-threading expectations.

How This Combo Ranks

The combo's rank of 508 out of 3,720 tested configurations represents the 86.3rd percentile of all system pairings in Thief. This is a strong result, though not at the very top of the leaderboard. The positioning suggests that while the RTX 5080 is a dominant GPU, the Core i5-12400's mid-range standing creates a slight ceiling in this particular title. The CPU's average benchmark score of 18,683 places it just 0.1% below the AMD EPYC 7643, which scores 18,697, and 0.3% below the Intel Core i7-1355U at 18,730. Interestingly, the CPU sits 0.9% above the Intel Core i3-14100F's 18,519, showing that the 12400 holds its own against both enterprise and newer consumer silicon.

The GPU tells a different story. With an average benchmark score of 56,083, the RTX 5080 sits 0.6% above the AMD Radeon 8060S (55,757) and 0.7% above the AMD Radeon RX 6750 GRE 12 GB (55,698). It trails the AMD Radeon RX 9070 GRE by 2.2% (57,367). This tight clustering around the 5080's score indicates that in raw compute terms, several AMD offerings are within striking distance. Yet in Thief specifically, the measured FPS data shows the 5080 delivering playable frame rates even at 4K Ultra, which many lower-tier cards cannot achieve.

What does the rank imply for real-world usage? The gap between this combo's 508th position and the top configurations likely stems from CPU-bound scenarios at lower resolutions. The 12400's 3DMark scores — 5,873 in the 16-thread test and 910 in single-thread — indicate decent but not exceptional processing power. Thief's engine appears to respond well to the 12 threads available, but the architecture's 10nm process and 65W TDP suggest it wasn't designed for the extreme frame rates this GPU can push at 1080p.

Settings Recommendations

The measured FPS rows provide a clear hierarchy across the four settings presets. At 1920x1080, the Low preset delivers 170 FPS average, Medium hits 154 FPS, High reaches 139 FPS, and Ultra drops to 137 FPS. The spread from Low to Ultra is a modest 33 FPS, representing a 19.4% performance penalty for maximum visual fidelity. This compression suggests the GPU is not the limiting factor at this resolution; the CPU's ability to feed frames becomes the constraint.

At 2560x1440, the pattern shifts slightly. Low produces 150 FPS, Medium 136 FPS, High 123 FPS, and Ultra 121 FPS. The gap between Low and Ultra narrows to 29 FPS, or 19.3%, nearly identical to the 1080p scaling. This consistency indicates that the rendering workload scales predictably with settings, and the CPU remains a factor even at higher pixel counts.

The 4K results tell a different story. At 3840x2160, Low yields 126 FPS, Medium 103 FPS, High 79 FPS, and Ultra 75 FPS. The Ultra-to-Low penalty jumps to 40.5%, suggesting the GPU now plays a more significant role. For the best experience, Medium at 4K offers a balanced 103 FPS with minimums of 88 FPS and maximums of 119 FPS — the only preset at this resolution with full min/max data. At 1440p, Medium provides 136 FPS with a 115 FPS minimum and 156 FPS maximum, making it the sweet spot for high refresh rate displays. At 1080p, High at 139 FPS offers the best compromise between visual quality and the headroom needed to avoid CPU bottlenecks.

Resolution Scaling

The FPS progression from 1080p to 4K reveals where the bottleneck shifts. At Low settings, 1080p produces 170 FPS, 1440p drops to 150 FPS (an 11.8% reduction), and 4K falls to 126 FPS (a 25.9% reduction from 1080p). This relatively gentle decline indicates that even at 4K Low, the GPU has ample resources; the 5080's 960.0 GB/s memory bandwidth and 56.28 TFLOPS FP32 throughput are not being fully taxed.

Medium settings show a steeper curve: 154 FPS at 1080p, 136 FPS at 1440p (11.7% drop), and 103 FPS at 4K (33.1% drop). The increasing gap between 1440p and 4K suggests the pixel fill rate and shading demands begin to bite. High settings amplify this trend: 139 FPS at 1080p, 123 FPS at 1440p (11.5% drop), and 79 FPS at 4K (43.2% drop). The 4K High result of 79 FPS indicates the GPU is now the primary constraint, as the 44 FPS difference between 1440p and 4K cannot be explained by CPU limitations alone.

Ultra settings follow a similar pattern to High: 137 FPS at 1080p, 121 FPS at 1440p (11.7% drop), and 75 FPS at 4K (45.3% drop). The near-identical performance between High and Ultra at each resolution — 2 FPS difference at 1080p, 2 FPS at 1440p, and 4 FPS at 4K — suggests Ultra adds minimal visual fidelity while consuming meaningful GPU resources. The 4K Ultra result of 75 FPS remains above the 60 FPS threshold, but the 4K High-to-Ultra penalty of only 5.1% makes Ultra a reasonable choice for those seeking maximum quality.

Measured FPS Breakdown

At 1920x1080, the combo delivers its highest raw frame rates. Low settings produce an average of 170 FPS, representing the absolute ceiling for this CPU-GPU pairing. Medium steps down to 154 FPS with a minimum of 131 and maximum of 177, providing a smooth experience on 144Hz displays. High achieves 139 FPS, and Ultra lands at 137 FPS — a mere 2 FPS difference that suggests diminishing returns beyond High. The narrow 33 FPS range across all settings indicates the CPU is the limiting factor, as even the most demanding preset cannot push the GPU to its limits at this resolution.

The 2560x1440 results show a more balanced distribution. Low yields 150 FPS, which still exceeds most high-refresh monitors' capabilities. Medium produces 136 FPS with a 115 FPS minimum and 156 FPS maximum, offering excellent consistency. High reaches 123 FPS, and Ultra delivers 121 FPS. The 29 FPS spread from Low to Ultra is slightly narrower than at 1080p, but the absolute values remain high enough for competitive play. The Medium preset's 115 FPS minimum is particularly notable, as it ensures no noticeable stutters during demanding scenes.

At 3840x2160, the GPU's workload becomes evident. Low settings produce 126 FPS, which is impressive for 4K but represents a 25.9% drop from 1080p Low. Medium delivers 103 FPS with an 88 FPS minimum and 119 FPS maximum — the tightest min/max range in the dataset, indicating stable frame pacing. High falls to 79 FPS, and Ultra bottoms out at 75 FPS. The 4K Ultra result of 75 FPS is still playable, but the 51 FPS gap between 4K Low and 4K Ultra highlights how settings impact this resolution. The Medium preset at 4K offers the best balance, with an 88 FPS minimum ensuring no drops below typical 60 Hz refresh rates.

GPU Role

The RTX 5080's 16 GB of GDDR7 memory on a 256-bit bus provides 960.0 GB/s of bandwidth, which proves sufficient for Thief's 4K textures and effects. The GPU's 10,752 shading units, 336 TMUs, and 112 ROPs deliver a pixel rate of 293.1 GPixel/s and texture rate of 879.3 GTexel/s. These specifications translate into the measured 4K performance, where the card maintains 75 FPS at Ultra settings. The 5nm process node from TSMC, containing 45,600 million transistors across a 378 mm² die, enables a boost clock of 2617 MHz that sustains high throughput.

The GPU's benchmark scores reinforce its positioning. The 3DMark Steel Nomad DX12 score of 8,637, Geekbench OpenCL score of 235,901, and Vulkan score of 255,450 all indicate strong compute capabilities. The Passmark G3D score of 36,565 places it in the 87th percentile of all GPUs, though the nearest rivals show how competitive the market is. The AMD Radeon 8060S trails by just 0.6%, and the RX 6750 GRE 12 GB by 0.7%. The RX 9070 GRE leads by 2.2%, yet the 5080's 16 GB VRAM and GDDR7 memory give it an advantage in memory-intensive scenarios like 4K Ultra.

In Thief specifically, the GPU's role becomes more pronounced as resolution increases. At 1080p, the 5080 is underutilized, with even Ultra settings failing to stress its resources. At 4K, the card's fill rate and memory bandwidth become critical, with the 40.5% performance penalty from Low to Ultra demonstrating the GPU's workload scaling. The 75 FPS 4K Ultra result suggests the 5080 has headroom for future titles, but Thief's engine limits how much of the card's theoretical performance can be extracted.

FAQ

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

A: The data shows that 2560x1440 at Medium settings provides 136 FPS average with a 115 FPS minimum and 156 FPS maximum. This offers the best balance of visual quality and smoothness. At 4K, Medium delivers 103 FPS, which is also excellent, but the 88 FPS minimum is closer to the 60 FPS threshold.

Q: How does the RTX 5080 compare to its nearest GPU rivals?

A: The 5080's average benchmark score of 56,083 places it 0.6% above the AMD Radeon 8060S (55,757) and 0.7% above the AMD Radeon RX 6750 GRE 12 GB (55,698). It trails the AMD Radeon RX 9070 GRE by 2.2% (57,367). These margins are small, suggesting near-parity in raw compute.

Q: Does the CPU bottleneck the GPU in this game?

A: At 1080p, the FPS spread from Low (170) to Ultra (137) is only 33 FPS, indicating the CPU limits performance. At 4K, the spread widens to 51 FPS (126 to 75), showing the GPU becomes the primary constraint. The CPU's 6 cores and 12 threads are sufficient for 4K but hold back the GPU at lower resolutions.

Q: What is the minimum FPS recorded for this combo?

A: The lowest recorded minimum FPS is 88 at 3840x2160 with Medium settings. At 2560x1440 Medium, the minimum is 115 FPS, and at 1920x1080 Medium, it is 131 FPS. No minimum FPS data is available for the Low, High, or Ultra presets.

Q: How does the Core i5-12400 rank among all CPUs?

A: The CPU sits in the 72nd percentile of all processors, with an average benchmark score of 18,683. Its nearest rival, the AMD EPYC 7643, scores 18,697 (0.1% higher), while the Intel Core i3-14100F scores 18,519 (0.9% lower). This places it in the upper-mid range of CPU performance.

Q: Is the 4K Ultra preset playable with this combo?

A: Yes, the 4K Ultra preset delivers an average of 75 FPS. While this is the lowest measured result in the dataset, it remains above the 60 FPS standard. For smoother gameplay, 4K Medium offers 103 FPS with a minimum of 88 FPS, which is a safer choice for demanding scenes.

CPU Role

The Intel Core i5-12400 brings 6 cores and 12 threads from the Alder Lake-S architecture, with a base clock of 2.50 GHz and boost clock of 4.40 GHz. The 10nm process node and 65W TDP make it an efficient mid-range processor, but its performance in Thief suggests it can keep pace with the RTX 5080 only under specific conditions. The CPU's 18 MB of shared L3 cache and 1.25 MB L2 cache per core provide adequate data locality for a game from 2014, which was designed for quad-core processors. The dual-channel DDR4/DDR5 memory support and PCIe Gen 5 interface ensure the GPU receives data without bottlenecking the bus.

The CPU's benchmark results paint a picture of balanced capabilities. The Cinebench R23 multicore score of 15,989 and single-core score of 2,257 indicate strong multi-threaded performance for its class. The Geekbench multicore score of 8,564 and single-core score of 1,848 show similar characteristics. In 3DMark, the 16-thread score of 5,873 and single-thread score of 910 reveal that the CPU scales reasonably with thread count. The Passmark multithread score of 18,747 and single-thread score of 3,456 reinforce this, with the CPU achieving a 72nd percentile ranking overall.

In Thief, the CPU's role manifests in the 1080p results. The fact that Ultra settings (137 FPS) deliver nearly identical performance to High (139 FPS) suggests the CPU cannot feed the GPU fast enough to differentiate between these presets. The 33 FPS gap between Low and Ultra at 1080p is likely CPU-bound, as the GPU has excess capacity. At 4K, the CPU's limitations become less relevant, with the GPU's rendering workload dominating. The 12400's 12 threads handle Thief's engine demands without issue, but the architecture's 6 physical cores limit how many draw calls and physics calculations can be processed per frame. For a 2014 title, this CPU is more than adequate; the data shows the GPU becomes the limiting factor only at 4K resolutions.