Pc Building Simulator

This CPU and GPU pairing is built for raw throughput, and Pc Building Simulator responds accordingly. The data shows a system that obliterates 1080p and 1440p, while 4K remains perfectly playable, with the performance scaling revealing where each component’s workload begins and ends.

Resolution Scaling

The measured FPS drop from 1080p to 4K is steep but predictable for a simulation title that is heavily CPU-bound at lower resolutions. At 1080p with Low settings, the combo produces 386 FPS. Moving to 1440p Low drops that to 244 FPS, and at 4K Low it falls further to 127 FPS. That is a 67% reduction from 1080p to 4K at Low settings, which is a massive scaling factor. This pattern indicates that at 1080p, the CPU is doing most of the heavy lifting, and the frame rate is largely limited by how fast the Ryzen 9 8945HX can process game logic and simulation ticks. The GPU has plenty of headroom, which is why the FPS is so high.

At Ultra settings, the scaling is less dramatic but still significant. The 1080p Ultra average is 184 FPS, 1440p Ultra drops to 116 FPS, and 4K Ultra lands at 61 FPS. That is a 67% drop from 1080p to 4K as well, but the absolute numbers are lower because the GPU is now working harder on the higher fidelity effects. The key takeaway is that the GPU’s workload becomes more dominant as resolution increases, but even at 4K Ultra, the system never becomes unplayable. The 4K Ultra average of 61 FPS is right at the edge of what many consider smooth, but it is a solid result for a game that is not a fast-paced shooter.

The Medium preset tells a similar story. At 1080p Medium, the average is 274 FPS with a minimum of 233 FPS. At 1440p Medium, the average drops to 173 FPS with a minimum of 147 FPS. At 4K Medium, the average is 90 FPS with a minimum of 77 FPS. The minimum frame rates are worth noting here because they are the only measured minimums in the entire dataset. They show that the frame pacing is consistent, with the minimum being about 85% of the average at each resolution. This suggests that the system is not experiencing sudden stutters or hitches, which is crucial for a simulation game where you are often managing many moving parts on screen.

The scaling pattern across all settings points to a system that is CPU-limited at 1080p and becomes progressively more GPU-limited as resolution climbs. At 4K, the RTX 5090 is finally being pushed, but the Ryzen 9 8945HX still has enough single-thread performance to keep the simulation running smoothly. The fact that the FPS nearly doubles from 4K Low (127 FPS) to 1080p Low (386 FPS) shows that the CPU is not a bottleneck at any resolution, but its influence is most pronounced at the lower end.

GPU Role

The NVIDIA GeForce RTX 5090 is the dominant component in this pairing, and its specifications explain why it handles 4K so well. With 32 GB of GDDR7 memory on a 512-bit bus, the memory bandwidth is 1.79 TB/s. This is a massive amount of bandwidth that prevents any memory-related stuttering in a simulation game that may need to load many assets, textures, and objects simultaneously. The 32 GB capacity is also overkill for this game, but it ensures that there is no VRAM pressure even at 4K Ultra.

The GPU’s clock speeds are also relevant. The base clock is 2017 MHz, with a boost clock of 2407 MHz. This is a high boost clock for a flagship GPU, and it allows the card to maintain high throughput even when the game is not fully utilizing all 21,760 shading units. The chip itself, GB202, is built on a 5 nm process from TSMC, which contributes to its efficiency and thermal headroom. The RTX 5090’s 104.8 TFLOPS of FP32 performance is more than enough for Pc Building Simulator, which is not a graphically demanding title by modern standards.

The benchmark data shows that this GPU sits in the 92nd percentile of all GPUs, with an average benchmark score of 79,842. Its nearest rivals in the database are the NVIDIA Tesla P100 PCIe 16 GB (0.3% ahead) and the Tesla P100 PCIe 12 GB (0.6% ahead), which are professional compute cards. The AMD Radeon RX 6850M XT is 1.1% behind, and the AMD Radeon Pro Vega 64X is 1.4% ahead. This tells us that the RTX 5090 is at the top of the consumer stack, and its performance is only matched by specialized workstation parts.

In Pc Building Simulator specifically, the GPU’s role is to render the 3D viewport and the various components you place in the case. The game is not using ray tracing heavily, but the RTX 5090’s 170 RT cores are still available if needed. The data shows that the GPU is not the limiting factor until you hit 4K Ultra, where the average FPS drops to 61. This is a GPU-bound scenario, and the RTX 5090 is barely keeping the frame rate above 60. If you were using a lesser GPU, you would likely see this number drop below playable thresholds.

CPU Role

The AMD Ryzen 9 8945HX is a 16-core, 32-thread mobile processor based on the Zen 4 architecture, codenamed Dragon Range. It has a base clock of 2.50 GHz and a boost clock of 5.40 GHz. For a simulation game like Pc Building Simulator, the single-thread performance is often more critical than the raw core count, and this CPU delivers. The boost clock of 5.40 GHz is exceptionally high for a mobile chip, and it allows the game’s main simulation thread to run at maximum speed.

The CPU’s cache layout is also important. It has 64 MB of L3 cache, which is shared across all cores. This is a large pool of fast memory that can hold the game’s frequently accessed data, reducing latency when the simulation needs to query component stats or update the state of the build. The L1 cache is 64 KB per core, and the L2 is 1 MB per core, which are standard figures for Zen 4. The memory bandwidth of 83.2 GB/s over a dual-channel DDR5 interface is adequate for feeding the 16 cores, though it is not as high as some desktop parts.

Benchmark results for the 8945HX show it in the 95th percentile of all CPUs, with an average benchmark score of 76,212. Its nearest rivals are the Intel Core Ultra 9 285HX (0.1% ahead), the AMD EPYC Embedded 8224P (0.4% behind), the AMD Ryzen Threadripper PRO 9945WX (0.4% behind), and the AMD Ryzen 9 9950X3D (0.6% behind). This places it firmly in the top tier of mobile processors, and its performance is comparable to high-end desktop parts from a generation ago.

In Pc Building Simulator, the CPU is the primary driver of performance at 1080p. The game simulates the electrical behavior of components, thermal output, and system stability, all of which require frequent calculations. The 16 cores are likely not all fully utilized, but the high boost clock and large L3 cache ensure that the main simulation thread runs without hiccups. The data supports this: at 1080p Low, the system hits 386 FPS, which is far beyond the refresh rate of any monitor. This indicates that the CPU is not a bottleneck, and the frame rate is only limited by the game engine’s internal tick rate or the GPU’s ability to draw frames in a CPU-bound scenario.

How This Combo Ranks

The combo rank for this specific pairing in Pc Building Simulator is 547 out of 3,002 tested configurations. This places it in the top 18% of all tested combos. That might seem low for a flagship CPU and GPU, but it is important to consider the context. The database includes many combinations with higher-ranked CPUs or GPUs, and the rank is a combined metric that weighs both components’ performance in this specific game.

A rank of 547 out of 3,002 means that there are 546 combos that produce higher average FPS in this game. Given that the CPU is in the 95th percentile and the GPU is in the 92nd percentile, this rank is likely due to the fact that Pc Building Simulator is not a graphically intensive game. The RTX 5090’s massive compute power is mostly wasted here, and the 8945HX’s 16 cores are not fully utilized. A combo with a slightly slower GPU but a faster single-thread CPU might rank higher because the game is more sensitive to single-thread performance.

The data shows that the combo is still very fast, with 4K Ultra averaging 61 FPS. However, users looking for the absolute highest frame rates in this specific title might find that a pairing with a desktop-class overclocked CPU yields better results. The rank is not a measure of value or suitability; it is a raw performance metric. For a simulation game, this combo is more than capable, and the rank reflects that it is a high-end setup, just not the absolute peak.

Settings Recommendations

Based on the measured FPS data, the best experience for most users would be the High preset at 1440p or 4K. At 1440p High, the average FPS is 122, which is smooth and leaves headroom for streaming or background tasks. At 4K High, the average is 64 FPS, which is just above the 60 FPS target for most monitors. If you have a 4K display with VRR, this is the sweet spot for visual fidelity and performance.

The Ultra preset is only recommended if you have a 1440p monitor with a high refresh rate. At 1440p Ultra, the average is 116 FPS, which is still very smooth. At 4K Ultra, the average drops to 61 FPS, which is playable but close to the edge. The step from High to Ultra is likely to add minor visual improvements that are not worth the FPS hit at 4K.

For competitive or high-refresh-rate gaming, the Medium preset is the best choice. At 1080p Medium, the average is 274 FPS, which is beyond the range of most monitors. At 1440p Medium, you still get 173 FPS, which is excellent for a 144Hz or 165Hz panel. The Low preset is only useful for maximum frame rates, hitting 386 FPS at 1080p, but the visual quality suffers significantly, and it is not recommended for a game that is about seeing components clearly.

The Medium preset also shows the most consistent minimum frame rates in the data, with a minimum of 233 FPS at 1080p, 147 FPS at 1440p, and 77 FPS at 4K. This suggests that Medium is the most stable preset in terms of frame pacing, likely because it balances the CPU and GPU workloads more evenly than Low or Ultra.

Measured FPS Breakdown

At 1920x1080, the system produces its highest frame rates. The Low preset averages 386 FPS, with no minimum or maximum recorded. The Medium preset averages 274 FPS, with a minimum of 233 FPS and a maximum of 315 FPS. The High preset averages 193 FPS, and the Ultra preset averages 184 FPS. The scaling from Low to Ultra is a 52% reduction in FPS, which is significant but still leaves the system far above playable thresholds.

At 2560x1440, the frame rates remain high. The Low preset averages 244 FPS. The Medium preset averages 173 FPS, with a minimum of 147 FPS and a maximum of 199 FPS. The High preset averages 122 FPS, and the Ultra preset averages 116 FPS. The step from High to Ultra is only a 5% drop in FPS, which is a small cost for the extra visual settings.

At 3840x2160, the system still performs admirably. The Low preset averages 127 FPS. The Medium preset averages 90 FPS, with a minimum of 77 FPS and a maximum of 104 FPS. The High preset averages 64 FPS, and the Ultra preset averages 61 FPS. The drop from High to Ultra is only 3 FPS, suggesting that the Ultra preset adds little additional load over High at this resolution, or that the game is hitting a CPU limit at this point.

The data shows a consistent pattern: the Medium preset offers the best balance of performance and stability, with the only measured minimum and maximum values across all resolutions. The High preset is also strong, but it sacrifices about 30% of the FPS compared to Medium at each resolution. The Ultra preset is only marginally worse than High, making it a viable option for users with adaptive sync displays. The Low preset is the only one that pushes the system to its limits, but the visual quality is likely poor for a game where you need to see component details.