Thief

# Thief Performance Analysis: Intel Core Ultra 5 225 + Intel Arc B370

The Intel Core Ultra 5 225 paired with the Intel Arc B370 integrated graphics produces a strikingly constrained gaming experience in Thief, with the combo ranking 2634th out of 2851 tested combinations. This places the system in the bottom 8% of all tested configurations, a position that reflects the Arc B370's integrated nature rather than any deficiency in the 10-core Arrow Lake processor. The measured frame rates across resolutions and settings tell a consistent story: this is a system where the graphics solution is the overwhelming bottleneck, and the CPU's considerable compute headroom remains largely untapped. The data reveals a platform that can handle Thief's stealth mechanics at lower resolutions with playable results, but which collapses under the weight of 4K rendering demands.

Resolution Scaling

The frame rate progression from 1080p to 4K reveals a dramatic and consistent performance cliff that points squarely at the integrated GPU as the limiting factor. At 1080p High settings, the combo produces 45 FPS average, but this drops to 31 FPS at 1440p and further to 18 FPS at 4K. That represents a 60% reduction from 1080p to 4K at High settings, a scaling curve that suggests the rendering pipeline is being saturated well before the CPU becomes relevant. The pattern repeats across all settings presets: Low settings yield 78 FPS at 1080p, 53 FPS at 1440p, and 31 FPS at 4K—a 40% drop from 1080p to 1440p and another 41% drop from 1440p to 4K. Medium settings show 59 FPS at 1080p, 41 FPS at 1440p, and 24 FPS at 4K, while Ultra settings produce 43 FPS, 29 FPS, and 17 FPS respectively.

The consistency of these scaling ratios across all four settings presets is telling. When a system is CPU-limited, resolution scaling typically shows minimal FPS differences because the processor workload remains constant regardless of pixel count. Here, the data shows near-linear degradation with increasing resolution, which is the signature of a GPU-bound scenario. The Arc B370's 6.144 TFLOPS of FP32 compute and 48.00 GPixel/s pixel rate are being pushed to their absolute limits at higher resolutions. The fact that even Low settings at 4K only muster 31 FPS—below the 33.3ms frame time threshold for 30 FPS—indicates that the graphics hardware simply cannot feed pixels fast enough at 3840x2160, regardless of how much rendering work is offloaded through reduced quality settings.

What makes this scaling particularly interesting is the comparison between settings presets at each resolution. At 1080p, the gap between Low (78 FPS) and Ultra (43 FPS) is 35 FPS, or roughly 45%. At 4K, that same gap narrows to 14 FPS (31 vs 17), a 45% reduction. This convergence at higher resolutions suggests that the GPU is becoming so saturated that the additional work required by higher settings has diminishing impact on frame rate—the bottleneck is raw pixel throughput rather than shading complexity. The 20 ROPs and 40 TMUs in the Arc B370 are the likely culprits, as fill-rate-limited scenarios exhibit exactly this kind of behavior where resolution matters more than settings.

GPU Role

The Intel Arc B370 is an integrated graphics solution built on the Xe3-LPG architecture with 1280 shading units, 40 texture mapping units, and 20 raster output units. Its 300 MHz base clock and 2400 MHz boost clock provide the compute foundation, but the memory configuration is the most telling specification: the GPU uses System Shared memory, meaning its bandwidth is entirely dependent on the host system's DDR5 memory channel. With the Core Ultra 5 225's dual-channel memory providing 102.4 GB/s, the Arc B370 must compete with the CPU for the same memory bandwidth, a constraint that becomes increasingly problematic at higher resolutions where texture and framebuffer demands grow exponentially.

The 3DMark Steel Nomad DX12 benchmark score of 1184 places this GPU in the 5th percentile of all GPUs, with nearest rivals including the ATI Mobility Radeon HD 5570 (deltaPct -0.2), ATI Radeon HD 5770 (deltaPct -0.5), and AMD Radeon HD 7650M (deltaPct -0.7). This is hardware from the early 2010s era being compared to a 2026 integrated solution, which contextualizes the Thief performance figures. The 10 ray tracing cores support DirectX 12 Ultimate, but Thief launched in 2014 and would not leverage these features, meaning the GPU's modern capabilities are largely irrelevant to this particular game's workload.

The measured FPS data confirms that the Arc B370's 6.144 TFLOPS FP32 throughput is adequate for 1080p gaming at modest settings but insufficient for higher resolutions. At 1080p Low, the 78 FPS average indicates the GPU can handle Thief's geometry and lighting at reduced quality. However, the drop to 59 FPS at Medium and 45 FPS at High suggests that each incremental increase in shading quality takes a significant toll. The 20 ROPs limit pixel fill rate, and the texture rate of 96.00 GTexel/s becomes a bottleneck when higher-resolution textures and more complex materials are enabled. The System Shared memory means there is no dedicated VRAM pool, so the GPU must constantly fetch data from system memory, adding latency that manifests as the observed frame rate drops.

FAQ

Q: Why does the frame rate drop so dramatically from 1080p to 4K?

A: The Arc B370 is an integrated GPU with 20 ROPs and System Shared memory. At 4K, the pixel fill rate requirement quadruples compared to 1080p, and the shared memory bandwidth cannot keep up. The data shows 4K performance at 17-31 FPS across all settings, versus 43-78 FPS at 1080p, indicating the GPU is the primary constraint.

Q: Is the Intel Core Ultra 5 225 processor limiting performance in Thief?

A: No. The CPU has 10 cores, 10 threads, and a boost clock of 4.90 GHz, with a Cinebench R23 multi-core score of 25891 and single-core score of 3655. These are strong results that place the CPU in the 85th percentile. The consistent FPS drops across resolution scaling indicate the GPU, not the CPU, is the bottleneck.

Q: How does this combo compare to other tested systems in Thief?

A: The combo ranks 2634th out of 2851 tested combinations, placing it in the bottom 8% of all systems. This is expected given the Arc B370's 5th percentile GPU ranking, which sits near the ATI Radeon HD 5770 and Mobility Radeon HD 5570 in compute performance.

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

A: 1920x1080 is the only resolution where the frame rates approach playable levels. At 1080p Low, the system achieves 78 FPS, and even Medium settings produce 59 FPS. At 1440p, only Low settings (53 FPS) approach acceptable performance, while 4K is not viable at any setting.

Q: Why does the gap between Low and Ultra settings shrink at higher resolutions?

A: At 1080p, the difference between Low (78 FPS) and Ultra (43 FPS) is 35 FPS. At 4K, the difference narrows to 14 FPS (31 vs 17). This convergence indicates the GPU becomes so fill-rate limited at 4K that reducing shading complexity has diminishing returns—pixel output is the bottleneck, not shading.

Q: Does the Arc B370's modern feature set help with Thief?

A: No. Thief released in 2014 and predates DirectX 12 Ultimate and ray tracing. The GPU's 10 RT cores and DirectX 12 Ultimate support are irrelevant to this game's DX11-era workload. The performance is determined purely by raw rasterization throughput and memory bandwidth.

Measured FPS Breakdown

At 1920x1080, the system delivers its best results. Low settings produce an average of 78 FPS, which is smooth and well above the 60 FPS threshold. Medium settings drop to 59 FPS average, with a measured range of 50 FPS minimum to 68 FPS maximum, indicating some frame time variance but generally acceptable performance. High settings yield 45 FPS average, which is playable but with noticeable dips possible. Ultra settings produce 43 FPS average, the lowest at this resolution, but still within a range that many players would consider tolerable for a stealth game where precise timing matters less than in fast-paced action titles.

At 2560x1440, the performance becomes marginal. Low settings achieve 53 FPS average, which is still playable but represents a significant drop from the 1080p Low result. Medium settings fall to 41 FPS average (35-47 FPS range), which is borderline for smooth gameplay. High settings produce 31 FPS average, which is below the 30 FPS threshold for acceptable frame pacing. Ultra settings yield 29 FPS average, making 1440p Ultra effectively unplayable for most users. The 1440p results show that only Low settings provide a consistently playable experience, and even that is approaching the lower bound of acceptable performance.

At 3840x2160, the system struggles across all settings. Low settings produce 31 FPS average, which is technically above 30 FPS but with no minimum FPS data to indicate frame time stability. Medium settings yield 24 FPS average (20-27 FPS range), which will exhibit noticeable stuttering. High settings drop to 18 FPS average, and Ultra settings fall to 17 FPS average. No 4K configuration produces a frame rate that could be considered playable for a game requiring stealth timing and environmental awareness. The 4K results confirm that this resolution is simply beyond the capabilities of the Arc B370's integrated graphics.

How This Combo Ranks

The combination of Intel Core Ultra 5 225 and Intel Arc B370 ranks 2634th out of 2851 tested combos in Thief, placing it in the 7.6th percentile of all systems tested. This ranking is almost entirely attributable to the GPU, which itself ranks in the 5th percentile of all GPUs based on its 3DMark Steel Nomad score of 1184. The CPU, by contrast, ranks in the 85th percentile of all CPUs, with an average benchmark score of 36938 that places it near the AMD Ryzen 5 5600F (36945, 0% deltaPct) and AMD Ryzen 5 5500X3D (37018, -0.2% deltaPct).

This massive disparity between CPU and GPU performance levels creates an unusual situation where the system's gaming capability is determined almost entirely by the graphics solution. The combo ranking of 2634 out of 2851 means that only 217 tested combinations perform worse, and those are likely systems with even older integrated graphics or severely mismatched hardware. The data suggests that this combo would be better suited to games with lower graphical demands or to productivity workloads where the CPU's 10 cores and 20 MB of L3 cache can be fully utilized.

The nearest GPU rivals in terms of benchmark scores—ATI Mobility Radeon HD 5570, ATI Radeon HD 5770, and AMD Radeon HD 7650M—are all discrete GPUs from the early 2010s. This context is important because Thief itself released in 2014, meaning the game's graphical requirements were designed for hardware of that era. The Arc B370's performance in Thief is therefore not surprising given its benchmark positioning, but it does highlight how integrated graphics have lagged behind discrete solutions in rasterization performance.

CPU Role

The Intel Core Ultra 5 225 is a 10-core, 10-thread processor based on the Arrow Lake architecture, manufactured on TSMC's 3 nm process. Its base clock of 3.30 GHz and boost clock of 4.90 GHz provide strong single-thread performance, as evidenced by its Cinebench R23 single-core score of 3655 and PassMark single-thread score of 4412. The 20 MB shared L3 cache and dual-channel DDR5 memory support (102.4 GB/s bandwidth) round out a capable gaming processor. However, in Thief, the CPU's role is largely passive because the GPU is the limiting factor at every resolution and settings combination.

The benchmark data shows the CPU is far more capable than what Thief demands. Its Cinebench R23 multi-core score of 25891 and PassMark multithread score of 30459 indicate substantial compute headroom. The nearest CPU rivals—AMD Ryzen 5 5600F (0% deltaPct), AMD Ryzen 5 5500X3D (-0.2% deltaPct), and AMD Ryzen AI 7 PRO 450 (-0.4% deltaPct)—all offer similar performance levels, confirming that this processor is in the upper echelon of mainstream desktop CPUs.

In Thief specifically, the CPU's 10 cores and 10 threads are more than sufficient for the game's AI, physics, and game logic. The fact that frame rates remain GPU-bound across all tested configurations means that even a significantly weaker CPU would produce nearly identical results in this title. The CPU's 4.90 GHz boost clock provides the single-thread performance that older games like Thief often depend on, but the measured FPS data shows no evidence of CPU-induced frame rate limits. The system's 85th percentile CPU ranking versus 5th percentile GPU ranking creates an extreme imbalance where the processor is effectively wasted in gaming scenarios.

Settings Recommendations

Based on the measured FPS data, the recommended configuration for this combo is 1920x1080 with Medium settings, which delivers 59 FPS average with a 50-68 FPS range. This provides the best balance between visual quality and performance, offering a smooth experience that remains above 50 FPS even in demanding scenes. The Medium preset at 1080p represents the sweet spot where the Arc B370's 6.144 TFLOPS compute capability is utilized effectively without overwhelming the 20 ROPs and System Shared memory.

For players who prioritize frame rate stability over visual fidelity, 1920x1080 Low settings at 78 FPS average is the optimal choice. This configuration provides a significant performance buffer that ensures consistent frame pacing, which is particularly valuable in a stealth game where quick reactions to guard movements can be critical. The 23 FPS improvement from Medium to Low (59 to 78 FPS) demonstrates that the Low preset significantly reduces the GPU workload, making it the safest option for maintaining smooth gameplay.

1080p High settings at 45 FPS and Ultra settings at 43 FPS are marginally playable but not recommended for consistent experiences. The 14 FPS gap between Medium and High suggests that the High preset introduces rendering features that disproportionately impact performance on this integrated GPU. At 1440p, only Low settings (53 FPS) provide adequate performance, while Medium (41 FPS) is borderline and High (31 FPS) or Ultra (29 FPS) are not recommended. 4K gaming is not viable with this combo at any settings preset, as even Low settings only achieve 31 FPS and Medium drops to 24 FPS.

The data indicates that players should avoid Ultra settings entirely with this hardware, as the 43 FPS at 1080p Ultra versus 45 FPS at 1080p High shows minimal visual return for the performance cost. The Medium preset at 1080p offers the most balanced experience, with its 59 FPS average providing sufficient headroom for the game's darker environments where lighting effects can cause frame rate fluctuations. For those who must play at higher resolutions, the Low preset is the only viable option, and even then only at 1440p where it achieves 53 FPS.