Pc Building Simulator

# How This Combo Ranks

The Intel Core i5-9400 paired with the AMD Radeon RX 7800 XT ranks 727th out of 1,769 tested combos in Pc Building Simulator. That places this configuration in the 59th percentile of all tested combinations, meaning roughly 41% of tested setups deliver higher frame rates in this simulation title. The ranking reflects a mid-pack position that is heavily influenced by the CPU's modest standing in the broader processor hierarchy.

The i5-9400 sits at the 50th percentile among all CPUs, with an average benchmark score of 2,305. This places it essentially neck-and-neck with the Intel Core i3-10305 (2,300, delta 0.2%), the Intel Core i3-1125G4 (2,299, delta 0.2%), and the Intel Xeon E-2134 (2,295, delta 0.4%). It trails the Intel Core i7-8809G by a mere 0.6% (2,319). These razor-thin margins show that the processor's performance class is tightly clustered, and the GPU is doing most of the heavy lifting in this combo.

The RX 7800 XT, by contrast, sits at the 76th percentile among all GPUs, with an average benchmark score of 32,619. Its nearest rivals include the AMD FirePro S9300 X2 (32,540, delta 0.2%), the NVIDIA P104-100 (32,747, delta -0.4%), the NVIDIA T600 Mobile (32,849, delta -0.7%), and the AMD FirePro S10000 (32,388, delta 0.7%). The GPU clearly outclasses the CPU in relative standing, which explains why the combo rank lands where it does: a strong graphics card lifting a mid-tier processor.

# GPU Role

The AMD Radeon RX 7800 XT is built on the RDNA 3.0 architecture with the Navi 32 chip, manufactured on a 5 nm process at TSMC. It packs 28,100 million transistors on a 346 mm² die, giving a transistor density of 81.2 million per square millimeter. The GPU operates with a base clock of 1,295 MHz, a game clock of 2,124 MHz, and a boost clock of 2,430 MHz. Memory runs at 2,438 MHz with 19.5 Gbps effective speed.

The 16 GB of GDDR6 memory on a 256-bit bus delivers 624.1 GB/s of bandwidth. This large memory pool is particularly relevant for Pc Building Simulator, a game that involves managing multiple system components and rendering detailed PC builds. The 3,840 shading units, 240 texture mapping units, and 96 render output units provide substantial raw throughput: 233.3 GPixel/s pixel rate, 583.2 GTexel/s texture rate, and 37.32 TFLOPS of FP32 compute.

The GPU's measured performance in this game shows a clear pattern: it scales strongly with lower settings at every resolution. At 1080p, the RX 7800 XT pushes from 158.5 FPS on Ultra to 241.4 FPS on Low. At 1440p, the range spans 101.1 FPS on Ultra to 210.6 FPS on Low. Even at 4K, the card manages 50.3 FPS on Ultra and 106.5 FPS on Low. These numbers indicate that the GPU is rarely the limiting factor at lower resolutions and settings, but it does become constrained at 4K Ultra where it drops below 60 FPS.

# Settings Recommendations

The measured data points to the High preset as the optimal balance for this combo. At 1080p High, the system delivers 165.4 FPS, which is well above the 158.5 FPS seen on Ultra while still maintaining high visual quality. The gap between High and Ultra is only 6.9 FPS at 1080p, but the quality difference in a simulation game like this typically justifies the modest performance loss for users prioritizing visuals.

At 1440p, High produces 107.1 FPS, comfortably above the 101.1 FPS on Ultra. The 6 FPS difference is proportionally similar to the 1080p gap, but the absolute frame rate on High remains above the 100 FPS threshold, making it the clear choice for smooth gameplay on 1440p displays. Medium at 1440p yields 147.1 FPS, which is an option for users with high-refresh monitors, but the visual fidelity trade-off from High is substantial.

For 4K users, the High preset delivers 51.8 FPS, which is just below the 60 FPS target. Medium at 4K produces 78.5 FPS, making it the better choice for 4K displays. Low at 4K hits 106.5 FPS, which is playable but sacrifices too much visual detail for a game that is about visualising PC builds. The data suggests that 4K users should opt for Medium, while 1080p and 1440p users can run High with confidence.

# Measured FPS Breakdown

At 1920x1080, the combo delivers its highest frame rates. Low settings produce 241.4 FPS, Medium reaches 216.8 FPS, High hits 165.4 FPS, and Ultra bottoms out at 158.5 FPS. The scaling from Low to Medium is a drop of 24.6 FPS, while Medium to High costs 51.4 FPS. The High to Ultra transition is relatively gentle, costing only 6.9 FPS.

Moving to 2560x1440, the frame rates remain strong but show a clear resolution penalty. Low delivers 210.6 FPS, Medium achieves 147.1 FPS, High produces 107.1 FPS, and Ultra drops to 101.1 FPS. The step from Low to Medium is a significant 63.5 FPS loss, while Medium to High costs 40 FPS. The High to Ultra gap narrows to just 6 FPS, mirroring the 1080p pattern.

At 3840x2160, the GPU begins to show its limits. Low settings yield 106.5 FPS, Medium drops to 78.5 FPS, High falls to 51.8 FPS, and Ultra reaches only 50.3 FPS. The Low to Medium transition costs 28 FPS, Medium to High costs 26.7 FPS, and High to Ultra is a mere 1.5 FPS difference. This suggests that Ultra offers almost no benefit over High at 4K, while High offers a meaningful improvement over Medium in visual fidelity terms.

# FAQ

Q: What is the best resolution for this combo in Pc Building Simulator?

A: The data shows that 1440p High delivers 107.1 FPS, which balances visual quality and smoothness. 1080p High reaches 165.4 FPS for higher refresh rates, while 4K is playable only on Medium at 78.5 FPS or Low at 106.5 FPS.

Q: How much performance does the RX 7800 XT lose when going from 1080p to 4K?

A: At High settings, the drop is from 165.4 FPS at 1080p to 107.1 FPS at 1440p, then to 51.8 FPS at 4K. This represents a 68.7% reduction from 1080p to 4K on the High preset.

Q: Is the i5-9400 a bottleneck for the RX 7800 XT?

A: The CPU ranks at the 50th percentile with an average score of 2,305, while the GPU sits at the 76th percentile with a score of 32,619. The combo rank of 727 out of 1,769 suggests the CPU is holding back the GPU, particularly at lower resolutions where frame rates exceed 200 FPS.

Q: What is the difference between High and Ultra settings at 1440p?

A: High produces 107.1 FPS while Ultra delivers 101.1 FPS, a difference of 6 FPS or 5.6%. The small gap suggests Ultra is viable at 1440p if users prefer maximum visual detail.

Q: Can this combo handle 4K gaming?

A: Yes, but with caveats. At 4K Medium, the combo achieves 78.5 FPS, which is smooth. At 4K High, it drops to 51.8 FPS, below the 60 FPS threshold. Low settings at 4K reach 106.5 FPS but compromise visual fidelity.

Q: How does the RX 7800 XT compare to its nearest rivals in synthetic benchmarks?

A: The GPU's average score of 32,619 is within 0.7% of its nearest rivals: the AMD FirePro S9300 X2 (32,540), NVIDIA P104-100 (32,747), NVIDIA T600 Mobile (32,849), and AMD FirePro S10000 (32,388). These are effectively identical performance levels.

# CPU Role

The Intel Core i5-9400 is a 6-core, 6-thread processor from the Coffee Lake architecture, manufactured on Intel's 14 nm process. It runs at a base clock of 2.90 GHz with a boost clock of 4.10 GHz. The CPU has a 65 W TDP and uses the Intel Socket 1151. It supports DDR4 memory in a dual-channel configuration with 42.7 GB/s of bandwidth, and features 64 KB of L1 cache per core, 256 KB of L2 per core, and 9 MB of shared L3 cache.

In synthetic benchmarks, the i5-9400 scores 803 in Cinebench R15 multi-core, 113 in single-core, 3,346 in Cinebench R20 multi-core, 472 in single-core, and 7,969 in Cinebench R23 multi-core with 1,125 in single-core. These results place it at the 50th percentile among all CPUs, with an average benchmark score of 2,305.

The CPU's nearest rivals underscore its mid-range positioning. The Intel Core i3-10305 (2,300), Intel Core i3-1125G4 (2,299), and Intel Xeon E-2134 (2,295) all sit within 0.4% of the i5-9400's score. The Intel Core i7-8809G (2,319) is only 0.6% faster. This tight clustering means that swapping the i5-9400 for any of these alternatives would yield virtually no measurable difference in Pc Building Simulator performance.

The 6-thread limitation becomes apparent in the measured FPS data. At 1080p Low, the combo hits 241.4 FPS, which suggests the CPU is still keeping up with the GPU's output. However, the fact that the combo ranks at 727 out of 1,769 indicates that many other configurations with stronger CPUs achieve higher frame rates, particularly at lower resolutions where the CPU becomes the limiting factor.

# Resolution Scaling

The frame rate scaling across resolutions reveals a system that becomes increasingly GPU-bound as resolution rises. At 1080p Low, the combo achieves 241.4 FPS. Dropping to 1440p Low reduces this to 210.6 FPS, a 12.8% decrease. At 4K Low, the frame rate falls to 106.5 FPS, which is a 55.9% reduction from 1080p Low.

The High preset shows a steeper scaling curve. From 165.4 FPS at 1080p to 107.1 FPS at 1440p, the drop is 35.2%. Moving to 4K High, the frame rate falls to 51.8 FPS, a 68.7% reduction from 1080p. This steeper decline at higher settings indicates that the GPU's rendering workload scales significantly with both resolution and graphical complexity.

The Medium preset provides an intermediate pattern: 216.8 FPS at 1080p, 147.1 FPS at 1440p (32.1% drop), and 78.5 FPS at 4K (63.8% drop). Ultra settings show the smallest absolute values but similar trends: 158.5 FPS at 1080p, 101.1 FPS at 1440p (36.2% drop), and 50.3 FPS at 4K (68.3% drop).

The data indicates that at 1080p, the CPU is the primary limiting component. The small frame rate differences between Medium and Ultra at 1080p (216.8 vs 158.5 FPS) suggest the GPU is still capable of higher output, but the CPU's 6 threads constrain the maximum achievable frame rate. As resolution increases to 1440p and 4K, the GPU becomes the bottleneck, evidenced by the proportional frame rate drops that align with pixel-count increases. The RX 7800 XT's 16 GB of VRAM and 624.1 GB/s bandwidth are sufficient even at 4K, as shown by the playable frame rates on Medium settings.