Doom

The Intel Core i5-13400F paired with the NVIDIA GeForce RTX 4080 is a high-end combination that delivers exceptional performance in Doom. This analysis examines how the components scale across resolutions and settings, based on measured FPS data.

Resolution Scaling

The data reveals a clear trend: as resolution increases, the average FPS drops significantly, indicating a shift in system bottleneck. At 1080p with High settings, the combo produces 295 FPS. Moving to 1440p High reduces this to 191 FPS, a drop of 104 FPS. At 4K High, the average falls to 104 FPS, which is exactly half of the 1080p High result.

This scaling pattern suggests that at 1080p, the CPU is likely the limiting factor, as the frame rates are extremely high and the GPU has ample headroom. The RTX 4080's 48.74 TFLOPS of FP32 performance is more than capable of rendering at 1080p, but the i5-13400F's single-thread performance becomes the constraint. The gap between 1080p and 1440p High (104 FPS difference) is larger than the gap between 1440p and 4K High (87 FPS difference). This non-linear scaling indicates that the GPU begins to take over as the primary bottleneck at higher resolutions.

The measured data for Medium settings includes min and max FPS values. At 4K Medium, the average is 123 FPS, with a min of 104 and a max of 141. At 1440p Medium, the average is 226 FPS, with min and max of 192 and 260. At 1080p Medium, the average is 350 FPS, with min and max of 297 and 402. These ranges show that the frame pacing is consistent, with the spread between min and max being relatively narrow at each resolution.

The 4K Ultra setting produces an average of 85 FPS, which is the lowest result in the entire dataset. This demonstrates that even a top-tier GPU like the RTX 4080, with its 16 GB of GDDR6X memory and 716.8 GB/s bandwidth, is pushed hard by Ultra settings at 4K. The scaling from High to Ultra at 4K is a drop of 19 FPS, while at 1440p the drop is 35 FPS, and at 1080p it is 54 FPS. This shows that the performance cost of Ultra settings diminishes at higher resolutions, as the GPU is already saturated.

CPU Role

The Intel Core i5-13400F is a 10-core, 16-thread processor based on the Raptor Lake architecture. Its base clock is 2.50 GHz, and it boosts up to 4.60 GHz. In Doom, a game that is not heavily multi-threaded, the CPU's single-core performance is critical. The benchmark data shows a 3dmark_single_thread score of 960, which is a solid result. The Cinebench R23 single-core score of 3191 further confirms its strong single-threaded capabilities.

The CPU's multi-threaded performance is also robust, with a Cinebench R23 multi-core score of 22604 and a Passmark multithread score of 25032. However, these scores are less relevant for Doom, which typically uses only a few cores. The 3dmark_16_threads score of 7314 and the 3dmark_max_threads score of 7307 are nearly identical, suggesting that the CPU's performance plateaus after 16 threads.

The i5-13400F's nearest rivals in the CPU benchmark database are the AMD Ryzen 9 6900HS (0% delta), Intel Core 5 120 (-0.3%), AMD Ryzen 5 5600X3D (-0.3%), and AMD Ryzen 7 6800H (0.4%). These deltas are all within a fraction of a percent, indicating that the i5-13400F is positioned at the top of its performance tier. Its 10 cores and 16 threads provide a good balance for gaming and productivity, though in Doom, the clock speed is more important than core count.

The CPU's 20 MB of shared L3 cache is another factor that can help with gaming performance. While the exact impact on Doom is not measured, a larger cache can reduce memory latency and improve frame times. The CPU supports DDR4 and DDR5 memory, though the specific memory bandwidth is not listed. The 65 W TDP is modest for a desktop CPU, which is typical for the Core i5 series.

GPU Role

The NVIDIA GeForce RTX 4080 is a powerhouse, built on the Ada Lovelace architecture with a 5 nm process from TSMC. It features 9728 shading units, 304 TMUs, and 112 ROPs. The boost clock is 2505 MHz, and the memory operates at 1400 MHz, which translates to 22.4 Gbps effective. The 16 GB of GDDR6X memory on a 256-bit bus provides a bandwidth of 716.8 GB/s.

The GPU's benchmark scores are impressive, with a Passmark G3D score of 34457 and a Geekbench Vulkan score of 263779. Its percentile ranking is 86th among all GPUs, placing it in the top tier. The nearest rivals are the RTX 4080 SUPER (0.1% delta), AMD Radeon Pro W5700X (-1.1%), AMD Radeon RX 6750 GRE 12 GB (-2.6%), and AMD Radeon 8060S (-2.7%). The RTX 4080 is essentially on par with the RTX 4080 SUPER, and it outperforms the other listed rivals by a small margin.

In Doom, the GPU's role becomes more pronounced at higher resolutions. At 1080p, the GPU is not fully utilized, as the CPU limits the frame rate. At 1440p, the GPU begins to work harder, and at 4K, it is the clear bottleneck. The RTX 4080's 16 GB of VRAM is more than sufficient for Doom at any resolution and setting, so VRAM capacity is not a limiting factor. The high pixel rate of 280.6 GPixel/s and texture rate of 761.5 GTexel/s ensure that the GPU can handle the game's rendering demands.

The GPU's TDP is 320 W, and it requires a 700 W power supply. Its triple-slot design and 310 mm length make it a large card that needs ample case space. The 1x 16-pin power connector is a newer standard, so users with older power supplies may need an adapter.

How This Combo Ranks

The combination of the Intel Core i5-13400F and NVIDIA GeForce RTX 4080 ranks 280th out of 3712 tested combos in Doom. This places it in the top 7.5% of all configurations, which is a very strong result. The rank reflects the overall performance of the combo, taking into account all resolutions and settings.

Given the CPU's 77th percentile ranking among all CPUs and the GPU's 86th percentile ranking among all GPUs, it is expected that this combo would rank highly. The data suggests that the combo is well-balanced, with the CPU not severely bottlenecking the GPU at any resolution. The fact that the combo ranks in the 280th position out of 3712 indicates that there are many other configurations that can achieve higher frame rates, but these likely involve more expensive CPUs or GPUs.

The combo's performance in Doom is particularly strong at 1080p and 1440p, where it can easily drive high-refresh-rate monitors. At 4K, it can still maintain playable frame rates, even at Ultra settings. The rank reflects the synergy between the i5-13400F's strong single-threaded performance and the RTX 4080's massive rendering power.

Measured FPS Breakdown

The measured FPS data provides a clear picture of the combo's performance across all settings and resolutions.

At 1920x1080:

• Low: 381 FPS average
• Medium: 350 FPS average (297 min, 402 max)
• High: 295 FPS average
• Ultra: 241 FPS average

At 2560x1440:

• Low: 260 FPS average
• Medium: 226 FPS average (192 min, 260 max)
• High: 191 FPS average
• Ultra: 156 FPS average

At 3840x2160:

• Low: 141 FPS average
• Medium: 123 FPS average (104 min, 141 max)
• High: 104 FPS average
• Ultra: 85 FPS average

The data shows that the combo is capable of delivering over 240 FPS at 1080p on Ultra settings, which is ideal for competitive gaming on high-refresh-rate monitors. At 1440p, the Ultra setting still provides 156 FPS, which is excellent for smooth gameplay. At 4K, the High setting provides a solid 104 FPS, while Ultra drops to 85 FPS, which is still playable but may not be ideal for all users.

The scaling from Low to Ultra settings is consistent across resolutions. At 1080p, the difference between Low and Ultra is 140 FPS. At 1440p, the difference is 104 FPS. At 4K, the difference is 56 FPS. This shows that the performance impact of increasing settings decreases as resolution increases, because the GPU becomes more heavily loaded.

FAQ

Q: What is the average FPS at 4K with High settings?

A: The average FPS is 104. This is the most demanding scenario in the dataset where the GPU is the primary bottleneck.

Q: How does the combo perform at 1440p with Ultra settings?

A: The average FPS is 156. This is a strong result that is well-suited for high-refresh-rate 1440p monitors.

Q: Is the CPU or GPU the limiting factor at 1080p?

A: The data indicates the CPU is likely the limiting factor at 1080p, as the frame rates are extremely high, reaching 381 FPS on Low settings. The GPU has more than enough power to render at this resolution.

Q: What is the lowest average FPS recorded in the dataset?

A: The lowest average FPS is 85, achieved at 4K with Ultra settings. This is still a playable frame rate, but it is the lowest in the measured results.

Q: How does the RTX 4080 compare to its nearest rival, the RTX 4080 SUPER?

A: The RTX 4080 is nearly identical in performance to the RTX 4080 SUPER, with a deltaPct of 0.1%. This means the two cards are effectively on par.

Q: What is the combo's overall rank among tested configurations?

A: The combo ranks 280th out of 3712 tested combos, placing it in the top 7.5% of all configurations tested in Doom.