Doom

Resolution Scaling

The measured FPS data for Doom with the AMD Ryzen 5 8400F and NVIDIA GeForce GTX 1660 Ti shows a steep and consistent drop as resolution climbs from 1080p to 4K. At 1080p High settings, the combo delivers 112.9 FPS. Moving to 1440p High drops that to 69.4 FPS, a 38.5% reduction. At 4K High, the average falls to 41.2 FPS, which is 63.5% below the 1080p figure. This scaling pattern is typical of a GPU-bound scenario at higher resolutions.

The Low settings preset tells the same story with higher absolute numbers. At 1080p Low, the system reaches 152.6 FPS, which drops to 99.6 FPS at 1440p and 53.7 FPS at 4K. The gap between Low and Ultra settings widens dramatically at 4K. At 1080p, the difference between Low and Ultra is 61.8 FPS (152.6 vs 90.8). At 4K, that spread shrinks to 21.3 FPS (53.7 vs 32.4), but the percentage drop from Low to Ultra is roughly the same.

The limiting component here is clearly the GPU. The GTX 1660 Ti has 6 GB of GDDR6 memory on a 192-bit bus with 288.0 GB/s bandwidth. The CPU, with 6 cores and 12 threads boosting to 4.70 GHz, has enough headroom to feed the GPU at 1080p, as evidenced by the 152.6 FPS Low result. But when resolution rises, the pixel throughput demands of the TU116 chip at 5.437 TFLOPS become the bottleneck. The 4K Ultra result of 32.4 FPS is below playable thresholds for most users, while 1440p Ultra at 56.4 FPS is borderline.

The data indicates that 1080p is the sweet spot for this pairing, with all four settings presets landing in playable territory (90.8 FPS or higher). At 1440p, only the Low preset (99.6 FPS) and Medium preset (82.6 FPS) clear the 60 FPS bar comfortably. High at 1440p sits at 69.4 FPS, which is still acceptable, but Ultra falls to 56.4 FPS. At 4K, every preset struggles, with the best result being Low at 53.7 FPS.

FAQ

Q: Can this combo run Doom at 4K smoothly?

A: No. The best 4K result is Low settings at 53.7 FPS. High settings drop to 41.2 FPS, and Ultra falls to 32.4 FPS. None of these reach 60 FPS, so 4K is not a viable target for this hardware in Doom.

Q: What is the best resolution for a 60 FPS experience?

A: At 1440p, both Low (99.6 FPS) and Medium (82.6 FPS) presets exceed 60 FPS, and High (69.4 FPS) also clears it. At 1080p, all four presets exceed 90 FPS, so any resolution below 1440p with appropriate settings will comfortably hit 60 FPS.

Q: How much performance is lost going from 1080p to 1440p?

A: At High settings, the drop is from 112.9 FPS to 69.4 FPS, a 43.5 FPS loss. At Low settings, the drop is from 152.6 FPS to 99.6 FPS, a 53 FPS loss. The percentage reduction is roughly 38-39% across presets.

Q: Is the Ryzen 5 8400F holding back the GTX 1660 Ti in this game?

A: The data suggests not at 1080p, where Low settings hit 152.6 FPS. This indicates the CPU can push well beyond 60 FPS. At higher resolutions, the GPU becomes the limiting factor, as evidenced by the larger FPS drops when resolution increases.

Q: What is the Ultra preset performance penalty versus High?

A: At 1080p, Ultra (90.8 FPS) is 22.1 FPS slower than High (112.9 FPS). At 1440p, Ultra (56.4 FPS) is 13 FPS slower than High (69.4 FPS). At 4K, Ultra (32.4 FPS) is 8.8 FPS slower than High (41.2 FPS).

Q: How does this combo rank among all tested combinations?

A: It ranks 1442 out of 1681 combos tested in Doom. This places it in the lower 14.2% of all tested systems, reflecting the GTX 1660 Ti's position as a mid-range GPU with a 55th percentile ranking among all GPUs.

GPU Role

The NVIDIA GeForce GTX 1660 Ti is the dominant factor in these results. Its 6 GB of GDDR6 memory on a 192-bit bus provides 288.0 GB/s of bandwidth, which is sufficient for 1080p and 1440p gaming but becomes strained at 4K. The GPU's boost clock of 1770 MHz and base clock of 1500 MHz are modest by modern standards, and the 5.437 TFLOPS FP32 throughput limits raw pixel pushing power.

The data shows that Doom responds strongly to GPU load. At 1080p, the difference between Low and Ultra is 61.8 FPS (152.6 vs 90.8), which indicates the GPU is the primary bottleneck even at lower resolutions. At 4K, the gap narrows to 21.3 FPS (53.7 vs 32.4), but this is because even Low settings at 4K overwhelm the GPU's capabilities.

The GTX 1660 Ti's 12 nm TU116 chip has 1536 shading units and 48 ROPs, with a pixel rate of 84.96 GPixel/s. These specifications explain why 4K Ultra at 32.4 FPS is so low — the ROP count and memory bandwidth are insufficient for the 8.3 million pixels at 3840x2160. The 6 GB VRAM capacity is also a concern at 4K, though the data shows the card is compute-bound rather than VRAM-limited at these settings.

The GPU's percentile ranking of 55 among all GPUs places it slightly above average, but its nearest rivals include the AMD Radeon RX 570X (deltaPct 0.4) and NVIDIA GTX 680 (deltaPct 0.8). This means the GTX 1660 Ti is in a crowded mid-range segment, and Doom's results reflect that positioning.

How This Combo Ranks

In the database of tested combinations, this pairing of AMD Ryzen 5 8400F and NVIDIA GeForce GTX 1660 Ti ranks 1442 out of 1681 combos for Doom. This places it in the bottom 14.2% of all tested systems. The rank is heavily influenced by the GPU's limitations at higher resolutions, as the CPU's performance is actually respectable — the Ryzen 5 8400F sits in the 82nd percentile among all CPUs.

The CPU's nearest rivals in overall benchmark scores are the AMD Ryzen 7 2700X (deltaPct 0) and AMD Ryzen 5 7500F (deltaPct 0.3), while the GPU's nearest rivals include the RX 570X (deltaPct 0.4) and RTX A2000 Mobile (deltaPct 0.8). These rivalries show that both components are near the middle of their respective performance curves, but the combination doesn't boost the overall ranking because Doom is GPU-intensive.

The 1442nd rank suggests that most other tested combos achieve higher average FPS in Doom, likely because they pair stronger GPUs with similar or better CPUs. The 4K results drag down the combo's overall standing, as the 32.4 FPS Ultra result is below what many other systems achieve even at lower settings.

Settings Recommendations

For a 60 FPS target, the data points to 1080p Medium (132.2 FPS) or High (112.9 FPS) as the sweet spot. Both presets offer a large margin above 60 FPS, allowing for smooth gameplay with headroom for drops. At 1440p, Medium (82.6 FPS) is the best balance of visual quality and performance, with High (69.4 FPS) also acceptable.

Avoid Ultra settings unless you are at 1080p and willing to accept 90.8 FPS, which is still smooth but noticeably lower than High. At 1440p Ultra (56.4 FPS) and 4K Ultra (32.4 FPS), the experience becomes stuttery and below the 60 FPS threshold. The Low preset is only useful for maximising frame rate at 4K, where it reaches 53.7 FPS, but this sacrifices visual fidelity for a still-sub-60 FPS result.

For the best measured experience, choose 1080p High (112.9 FPS) or 1440p Medium (82.6 FPS). These settings offer the best performance per visual quality trade-off based on the measured data, with neither dropping below 60 FPS and both providing a comfortable margin for demanding scenes.

Measured FPS Breakdown

1920x1080:

• Low: 152.6 FPS
• Medium: 132.2 FPS
• High: 112.9 FPS
• Ultra: 90.8 FPS

2560x1440:

• Low: 99.6 FPS
• Medium: 82.6 FPS
• High: 69.4 FPS
• Ultra: 56.4 FPS

3840x2160:

• Low: 53.7 FPS
• Medium: 43.5 FPS
• High: 41.2 FPS
• Ultra: 32.4 FPS

The scaling from 1080p to 1440p is consistent across presets, with roughly a 35-40% FPS reduction. The scaling from 1440p to 4K is steeper, with a 45-50% reduction, showing that the GTX 1660 Ti struggles disproportionately at 4K. The Low preset at 4K (53.7 FPS) is the only 4K result that approaches playability, but it is still below the 60 FPS target. All 1080p results exceed 90 FPS, making that resolution the clear choice for this hardware. The 1440p Medium and High presets are viable alternatives for users with 1440p monitors who are willing to compromise on settings.