Pc Building Simulator

# Pc Building Simulator: Intel Core Ultra 5 125H + NVIDIA GeForce RTX 4080 Mobile

This combination places the Intel Core Ultra 5 125H (a 14-core, 18-thread Meteor Lake mobile processor) alongside the NVIDIA GeForce RTX 4080 Mobile (an Ada Lovelace GPU with 12 GB of GDDR6 memory). Benchmark results for this simulation title show a system that is heavily GPU-limited at 4K, but capable of very high frame rates at lower resolutions, with the CPU's 18 threads proving sufficient to feed the GPU at 1080p.

CPU Role

The Intel Core Ultra 5 125H is built on the Meteor Lake architecture using a 7 nm process, featuring 14 cores and 18 threads. Its base clock is 3.60 GHz with a boost clock of 4.50 GHz, and it carries a 28 W TDP, marking it as a mobile-focused part. The cache hierarchy includes 112 KB of L1 per core, 2 MB of L2 per core, and 18 MB of shared L3 cache. Memory support is DDR5 with a dual-channel bus providing 89.6 GB/s of bandwidth, and the chip integrates Arc Xe-LPG 96EU graphics, though the discrete RTX 4080 Mobile handles the rendering here.

In synthetic CPU benchmarks, the Core Ultra 5 125H achieves a Cinebench R23 multi-core score of 12804.5 and a single-core score of 1647.5. Its PassMark multi-thread score is 21100, with a single-thread score of 3399. The average benchmark score across all tests is 27507, placing it in the 79th percentile of all CPUs. Its nearest rivals are extremely close: the AMD Ryzen 7 5800 scores 27535 (0.1% higher), the Intel Core i5-12600K and AMD Ryzen 7 5700X both score 27578 (0.3% higher), and the AMD Ryzen 3 PRO 5355G scores 27382 (0.5% lower). This means the 125H sits within a 0.8% band of these desktop-class competitors in aggregate CPU performance.

For Pc Building Simulator, the CPU's role is less about raw multi-core throughput and more about maintaining consistent frame pacing. The game is a simulation title, and the data shows that at 1080p with Low settings, the combo reaches 337 FPS average. At this point, the CPU is the primary limiter, as the GPU is far from saturated. The 18 threads and 4.50 GHz boost clock are sufficient to drive frame rates well beyond typical display refresh rates, but the single-thread performance (Cinebench R23 single-core of 1647.5) is what governs the simulation logic tick rate. The data indicates no CPU bottleneck at 1440p or 4K, where frame rates drop due to GPU load.

GPU Role

The NVIDIA GeForce RTX 4080 Mobile uses the AD104 chip on TSMC's 5 nm process, with 35,800 million transistors on a 294 mm² die. It has 7424 shading units, 232 TMUs, and 80 ROPs, along with 58 RT cores and 232 tensor cores. The GPU's base clock is 1290 MHz with a boost clock of 1665 MHz, and memory runs at 2250 MHz (18 Gbps effective) across a 192-bit bus, yielding 432.0 GB/s of bandwidth. The 12 GB GDDR6 frame buffer is a key asset for a simulation game that involves managing multiple system components and rendering detailed hardware models.

The RTX 4080 Mobile's PassMark G3D score is 24926, with a PassMark GPU compute score of 11191. Its GeekBench OpenCL score is 159575, and Vulkan score is 145807. The average benchmark score is 38135, placing it in the 81st percentile of all GPUs. Nearest rivals include the NVIDIA GeForce MX570 (38299, 0.4% higher), the GeForce RTX 5080 Mobile (38349, 0.6% higher), the GeForce RTX 4070 (37648, 1.3% lower), and the NVIDIA Tesla P4 (37628, 1.3% lower). The near-tie with the MX570 and RTX 5080 Mobile is notable; the aggregate scores suggest the 4080 Mobile is within 0.6% of a newer mobile flagship, though real-world gaming performance will diverge based on clocks and memory.

In this game, the GPU's 12 GB VRAM and 432.0 GB/s bandwidth are the dominant factors at higher resolutions. The measured FPS data shows a steep drop from 1080p to 4K, which is characteristic of a GPU-bound scenario. The RTX 4080 Mobile's pixel rate of 133.2 GPixel/s and texture rate of 386.3 GTexel/s define its fillrate ceiling, and the 4K Ultra result of 53 FPS indicates that the GPU is the limiting component at that setting.

Resolution Scaling

The measured FPS across resolutions reveals a clear GPU-bound pattern. At 1080p Low, the combo delivers 337 FPS, which drops to 213 FPS at 1440p Low (a 36.8% reduction) and further to 111 FPS at 4K Low (a 67.1% reduction from 1080p). This scaling is consistent with the GPU's fillrate and bandwidth limits; the 4K Low result is still high, but the drop is steep.

At High settings, the progression is 169 FPS at 1080p, 106 FPS at 1440p (a 37.3% drop), and 56 FPS at 4K (a 66.9% drop from 1080p). The similarity in percentage drops across Low and High settings indicates that resolution scaling is consistent regardless of quality preset, which points to the GPU as the bottleneck. At Medium settings, the 1080p average is 239 FPS, 1440p is 151 FPS (36.8% lower), and 4K is 79 FPS (66.9% lower). Ultra settings show 161 FPS at 1080p, 101 FPS at 1440p (37.3% lower), and 53 FPS at 4K (67.1% lower).

The consistent ~37% drop from 1080p to 1440p and ~67% drop from 1080p to 4K across all settings is a textbook GPU-bound signature. If the CPU were the limiter, the 1080p to 1440p drop would be smaller, as the CPU load would remain similar. Instead, the data shows that the RTX 4080 Mobile's performance scales predictably with pixel count, and the Core Ultra 5 125H is not constraining results at any resolution. The 4K Ultra result of 53 FPS is just below the 60 FPS target, while 4K High (56 FPS) and 4K Medium (79 FPS) offer better margins.

How This Combo Ranks

This specific combination of Intel Core Ultra 5 125H and NVIDIA GeForce RTX 4080 Mobile ranks 1188 out of 3723 tested combos in Pc Building Simulator. That places it in the 68th percentile of all combinations (calculated by rank position relative to total combos), which is respectable but not top-tier. The ranking reflects that the CPU is a mid-range mobile part (79th percentile overall) and the GPU is a high-end mobile part (81st percentile overall), but the combo's in-game rank is lower than either component's individual percentile suggests.

The gap between component percentiles and combo rank indicates that Pc Building Simulator is not purely GPU-bound at all settings; the simulation's CPU logic (managing component temperatures, power draw, and system stability) can create bottlenecks in certain scenarios. However, the measured FPS data shows that at 4K Ultra, the combo achieves 53 FPS, which is close to the 60 FPS target for smooth gameplay. At 1440p Ultra, the 101 FPS average is well above 60 FPS, and at 1080p Ultra, 161 FPS is very high.

Compared to other combos, the 1188 rank out of 3723 means there are 1187 faster combinations and 2535 slower ones. The fact that the GPU is in the 81st percentile while the combo is in the 68th percentile suggests that the CPU is slightly holding back the GPU in this game at lower resolutions. At 1080p Low, the 337 FPS result is likely CPU-limited, as the RTX 4080 Mobile could push higher if given more headroom. At 4K, the GPU is the clear limiter, and the combo's rank is more representative of the GPU's capabilities.

FAQ

Q: Is the Intel Core Ultra 5 125H strong enough for Pc Building Simulator at 4K?

A: Yes. At 4K Ultra, the combo delivers 53 FPS average, and at 4K High it reaches 56 FPS. The CPU's Cinebench R23 multi-core score of 12804.5 and single-core score of 1647.5 are sufficient to avoid bottlenecking the GPU at 4K, where the RTX 4080 Mobile is the limiting factor.

Q: How does the RTX 4080 Mobile compare to its nearest GPU rivals in this system?

A: The RTX 4080 Mobile's average benchmark score is 38135, which is 0.4% lower than the GeForce MX570 (38299) and 0.6% lower than the RTX 5080 Mobile (38349). It is 1.3% higher than the RTX 4070 (37648) and the Tesla P4 (37628). In-game, the 4080 Mobile's 12 GB VRAM and 432.0 GB/s bandwidth drive the 4K Medium result of 79 FPS.

Q: What FPS can I expect at 1440p with High settings?

A: The measured average is 106 FPS at 2560x1440 with High settings. This is based on the benchmark data, which also shows 151 FPS at Medium and 101 FPS at Ultra for the same resolution.

Q: Is there a big difference between Low and Ultra settings at 1080p?

A: Yes. At 1920x1080, Low settings produce 337 FPS average, while Ultra settings produce 161 FPS. That is a 52.2% reduction in frame rate from Low to Ultra, indicating that the GPU is doing significantly more work at higher quality presets.

Q: Does this combo maintain 60 FPS at 4K on any setting?

A: At 4K Medium, the average is 79 FPS, which is above 60 FPS. At 4K High, the average is 56 FPS, which is below 60 FPS. The 4K Ultra result is 53 FPS. So only the Medium preset at 4K exceeds the 60 FPS threshold.

Q: How does the CPU's performance compare to its direct rivals?

A: The Core Ultra 5 125H has an average benchmark score of 27507. The AMD Ryzen 7 5800 is 0.1% higher, the Intel Core i5-12600K and AMD Ryzen 7 5700X are 0.3% higher, and the AMD Ryzen 3 PRO 5355G is 0.5% lower. This places the 125H in the 79th percentile of all CPUs.

Settings Recommendations

The best experience per the measured rows depends on the target resolution and frame rate preference. At 1080p, the Ultra preset delivers 161 FPS average, which is far above the 60 FPS target and provides the highest visual quality without sacrificing smoothness. The Medium preset at 1080p (239 FPS) offers a huge frame rate cushion, but the Ultra preset is still well above 144 Hz refresh rates, making it the recommended choice for high-refresh displays.

At 1440p, the Ultra preset produces 101 FPS average, which is above 60 FPS and suitable for most displays. The High preset (106 FPS) is nearly identical in performance, so the choice between High and Ultra comes down to visual fidelity; the data shows only a 5 FPS difference between them. The Medium preset (151 FPS) is the best option for 144 Hz displays, as it exceeds 144 FPS.

At 4K, the Medium preset is the only one that maintains an average above 60 FPS, at 79 FPS. The High preset (56 FPS) and Ultra preset (53 FPS) both fall below 60 FPS, which may result in noticeable stuttering on 60 Hz displays. For a 4K experience, the Medium preset is the recommended setting, as it balances visual quality with a playable frame rate. The Low preset at 4K (111 FPS) is an option for higher refresh rates, but the visual degradation may not be worth the frame rate gain.

Measured FPS Breakdown

The following data represents the measured average FPS for each resolution and settings combination.

1920x1080 (1080p):

• Low: 337 FPS average
• Medium: 239 FPS average (min 203, max 275)
• High: 169 FPS average
• Ultra: 161 FPS average

2560x1440 (1440p):

• Low: 213 FPS average
• Medium: 151 FPS average (min 128, max 173)
• High: 106 FPS average
• Ultra: 101 FPS average

3840x2160 (4K):

• Low: 111 FPS average
• Medium: 79 FPS average (min 67, max 91)
• High: 56 FPS average
• Ultra: 53 FPS average

The Medium preset is the only one with recorded minimum and maximum FPS values. At 1080p Medium, the range is 203 to 275 FPS, indicating a 72 FPS spread. At 1440p Medium, the range is 128 to 173 FPS (45 FPS spread), and at 4K Medium, the range is 67 to 91 FPS (24 FPS spread). This narrowing range at higher resolutions further confirms the GPU-bound nature of the workload; as resolution increases, the frame time variance decreases because the GPU becomes the consistent bottleneck. The 4K Ultra result of 53 FPS is the lowest measured average, while the 1080p Low result of 337 FPS is the highest.