Downfall

The Intel Core i5-9400 paired with the AMD Radeon RX 7800 XT delivers a smooth experience in Downfall, but the data suggests you should not blindly max out every setting. The measured results show a clear performance hierarchy across presets, with the sweet spot being the High preset. At 1080p, High produces an average of 189 FPS, which is already well above the refresh rate of most standard monitors. Moving to Medium at 1080p raises the average to 231 FPS, but the jump from High to Ultra is drastic, dropping to 118 FPS. At 1440p, High maintains a strong 135 FPS average, while Medium sits at 165 FPS. The Ultra preset at 1440p falls to 85 FPS, which is still playable but shows a significant cost. The most demanding scenario, 4K Ultra, drops to 53 FPS, making it the only preset where the experience becomes marginal. For the best balance of visual fidelity and frame rate, the High preset is the recommended starting point, as it offers a large performance headroom over Ultra while still looking substantially better than Low.

Settings Recommendations

The measured FPS data provides a clear picture for settings optimization. The High preset is the most efficient choice across all resolutions. At 1080p, it delivers 189 FPS, which is 71 FPS higher than Ultra and only 42 FPS lower than Low. This indicates that the GPU has significant headroom to spare, and the visual quality gain from High over Medium is worth the 42 FPS difference. At 1440p, High delivers 135 FPS, which is 30 FPS higher than Ultra and only 67 FPS lower than Low. This makes High the best option for high-refresh-rate 1440p monitors. The Medium preset is a viable alternative if you want to push frame rates higher, offering 231 FPS at 1080p and 165 FPS at 1440p, but the jump from Medium to High is the most logical step for visual fidelity without a major performance penalty.

The Ultra preset is the only one that causes a significant frame rate collapse. At 1080p, it drops to 118 FPS, which is a 38% reduction from High. At 1440p, it drops to 85 FPS, a 37% reduction. At 4K, it falls to 53 FPS, which is below the 60 FPS threshold for many players. The data suggests that Ultra is poorly optimized for this combo, likely due to the CPU's six threads becoming a bottleneck at higher settings. The Low preset is only useful for competitive play or extremely high refresh rate displays, as it yields 271 FPS at 1080p and 202 FPS at 1440p, but the visual degradation is substantial. For the best overall experience, High is the definitive recommendation, as it provides a stable frame rate with minimal compromise.

CPU Role

The Intel Core i5-9400 is a 6-core, 6-thread processor from the Coffee Lake generation, with a base clock of 2.90 GHz and a boost clock of 4.10 GHz. Its benchmark scores place it at the 47th percentile among all CPUs, with an average score of 2254. The nearest rivals show a tight grouping: it is 0.2% behind the Intel Core i7-1068NG7, 0.3% ahead of the Intel Core i7-10710U, and 0.4% ahead of the AMD Ryzen 5 PRO 1500. This indicates the CPU is a mid-range part that is not a performance leader but is sufficient for many gaming workloads.

In Downfall, the CPU's role becomes apparent when examining the frame rate scaling across presets. At 1080p Low, the combo achieves 271 FPS, which is a very high frame rate that suggests the CPU is not the primary limiter at this setting. However, when moving to Ultra at 1080p, the frame rate drops to 118 FPS, a 56% reduction. This drop is much larger than the difference between Low and Medium or Medium and High, which suggests that the Ultra preset adds CPU-intensive calculations that the 6-thread processor struggles to handle. The same pattern is visible at 1440p, where Low produces 202 FPS but Ultra drops to 85 FPS. The CPU's 6 threads and 9 MB of shared L3 cache are adequate for standard settings, but the data indicates that the Ultra preset introduces a workload that exceeds what this processor can sustain.

The CPU's single-thread performance, as shown by a Cinebench R23 single-core score of 935, is decent but not exceptional. The boost clock of 4.10 GHz helps in gaming, but the lack of hyper-threading means it has fewer threads than some rivals. The comparison to the Intel Core i7-10710U, which is a 6-core, 12-thread part, shows the i5-9400 is only 0.3% faster on average, indicating that the extra threads of the i7 do not provide a significant advantage in general benchmarks. For Downfall, the CPU is sufficient for High and Medium presets but becomes a bottleneck at Ultra, especially at higher resolutions where the frame rate drop is more pronounced.

GPU Role

The AMD Radeon RX 7800 XT is a high-end graphics card from the Radeon RX 7000 series, built on the RDNA 3.0 architecture with a 5 nm process. It features 16 GB of GDDR6 memory on a 256-bit bus, providing a bandwidth of 624.1 GB/s. The GPU has 3840 shading units, 240 TMUs, and 96 ROPs, with a boost clock of 2430 MHz and a game clock of 2124 MHz. Its benchmark scores show a 51st percentile ranking among all GPUs, with an average score of 11627. The nearest rivals include the NVIDIA GeForce GTX 1660, which is 0.5% faster, and the AMD Radeon Pro 5500M, which is 0.9% slower. This places the RX 7800 XT in a competitive position, though its percentile ranking is modest due to the broad range of GPUs tested.

In Downfall, the GPU demonstrates its capability by maintaining high frame rates at lower settings. At 1080p Low, the combo achieves 271 FPS, which reflects the card's raw power. The GPU's role becomes more evident when looking at the scaling from 1080p to 4K. At High settings, the frame rate drops from 189 FPS at 1080p to 84 FPS at 4K, a 56% reduction. This scaling is typical for a GPU-bound scenario, indicating that the RX 7800 XT is the primary driver of performance at these settings. The 16 GB of VRAM is ample for Downfall, as the game is from 2016 and likely does not require more than 8 GB even at 4K Ultra, so the memory capacity is not a limiting factor.

The GPU's compute performance, as shown by a Passmark G3D score of 24176, is robust, but the frame rate data shows that the Ultra preset causes a disproportionate drop. At 4K Ultra, the combo only manages 53 FPS, which is a 38% reduction from 4K High. This is not a typical GPU bottleneck pattern; instead, it suggests that the CPU is not feeding the GPU enough data at Ultra settings. The GPU's 37.32 TFLOPS of FP32 performance is more than sufficient for this title, but the combination of the CPU's 6 threads and the Ultra preset's demands creates a situation where the GPU is underutilized. The data indicates that the RX 7800 XT is a capable partner for this CPU at Medium and High settings, but the Ultra preset is limited by the processor.

How This Combo Ranks

The combo of Intel Core i5-9400 and AMD Radeon RX 7800 XT is ranked 1277 out of 3716 tested combos in Downfall. This places it in the 34th percentile of all combinations, meaning it performs better than roughly two-thirds of the systems tested. This is a solid ranking, especially considering the CPU's modest 47th percentile ranking overall. The GPU's 51st percentile ranking is higher, which suggests that the graphics card is the stronger component in this pairing.

The ranking indicates that this combo is well-balanced for the game, but not exceptional. The CPU's limitations are the primary factor holding it back from a higher rank. When compared to other combos, the data shows that the i5-9400's performance is close to its rivals, but the RX 7800 XT is a significant step up from entry-level cards. The 1277th rank out of 3716 means that many combos with stronger CPUs or more balanced pairings will outperform this setup. However, the measured FPS at High settings (189 FPS at 1080p) is very playable, and the rank reflects that the system is capable of delivering a high-quality experience in Downfall.

The rank of 1277 is a useful indicator for potential buyers. It shows that this combination is not a top-tier performer, but it is far from the bottom. The data suggests that the CPU is the weak link, and if the user were to upgrade to a processor with more threads, the rank would likely improve significantly. For the current setup, the rank is acceptable for a 1080p and 1440p gaming experience, but it would not be the first choice for a high-end 4K system.

Resolution Scaling

The measured FPS data reveals a clear pattern of performance scaling from 1080p to 4K. At High settings, the average FPS drops from 189 at 1080p to 135 at 1440p and then to 84 at 4K. This represents a 29% drop from 1080p to 1440p and a 38% drop from 1440p to 4K. The scaling is generally smooth, indicating that the GPU is handling the increased pixel count, but the CPU becomes more of a factor at higher resolutions.

At Low settings, the frame rates are much higher, starting at 271 FPS at 1080p, dropping to 202 FPS at 1440p, and then to 125 FPS at 4K. The drop from 1440p to 4K is 38%, which is the same as the High setting, suggesting that the GPU is still the primary limiter at these lower settings. However, at Ultra settings, the scaling is more erratic. From 1080p to 1440p, the frame rate drops from 118 FPS to 85 FPS, a 28% reduction, but from 1440p to 4K, it drops to 53 FPS, a 38% reduction. This pattern indicates that the Ultra preset is not scaling well, likely due to the CPU's inability to maintain a consistent frame rate at higher resolutions.

The resolution scaling analysis shows that the limiting component changes depending on the preset. At Low settings, the GPU is clearly the bottleneck, as the frame rates are extremely high at 1080p and the drop to 4K is consistent with a GPU-bound workload. At Medium and High settings, the scaling is also mostly GPU-bound, with the CPU providing enough headroom to keep up. At Ultra, however, the CPU becomes the limiting factor, as the frame rate drops are steeper than expected and the absolute FPS numbers are lower than the GPU's capability would suggest. This is a classic sign of a CPU bottleneck at high settings, where the processor's 6 threads are overwhelmed by the game's physics and AI calculations.

FAQ

*Q: What is the best preset for this combo in Downfall?*

A: The High preset is the recommended choice. It delivers 189 FPS at 1080p and 135 FPS at 1440p, which are excellent for smooth gameplay. The Ultra preset drops to 118 FPS at 1080p and 85 FPS at 1440p, which is a significant performance penalty for marginal visual gains.

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

A: The data indicates that the CPU becomes a bottleneck at the Ultra preset. At 1080p Ultra, the frame rate is 118 FPS, which is much lower than the 189 FPS at High. This drop is disproportionate to the GPU's capability, suggesting the 6-thread processor struggles with the Ultra preset's workload.

Q: How does the RX 7800 XT compare to its nearest rivals in this setup?

A: The RX 7800 XT is 0.5% slower than the NVIDIA GeForce GTX 1660 and 0.9% faster than the AMD Radeon Pro 5500M based on average benchmark scores. Its 51st percentile ranking indicates it is a mid-to-high-range card, but it is not a top-tier performer.

*Q: Can this combo handle 4K gaming in Downfall?*

A: At 4K High settings, the combo achieves 84 FPS, which is playable. At 4K Ultra, it drops to 53 FPS, which is below the 60 FPS threshold for many players. For 4K, the High preset is the best option, as it provides a stable frame rate.

Q: What is the performance difference between Medium and High presets?

A: At 1080p, Medium delivers 231 FPS while High delivers 189 FPS, a difference of 42 FPS. At 1440p, Medium delivers 165 FPS while High delivers 135 FPS, a difference of 30 FPS. The visual quality improvement from High is generally worth the frame rate cost.

Q: How does the CPU's performance rank compared to other processors?

A: The i5-9400 is at the 47th percentile among all CPUs, with an average score of 2254. It is 0.2% behind the Intel Core i7-1068NG7 and 0.4% ahead of the AMD Ryzen 5 PRO 1500, showing it is a mid-range processor that performs adequately but is not a leader.