Doom

Resolution Scaling

The measured FPS data for Doom with the AMD Ryzen AI Max+ 395 and NVIDIA GeForce RTX 4080 Mobile shows a clear and expected scaling pattern as resolution increases. At 1920x1080 with High settings, the combo delivers 212 FPS average. Moving to 2560x1440 at High settings drops that to 137 FPS, a 35% reduction. At 3840x2160 High, the average falls further to 74 FPS, representing a 65% drop from the 1080p figure. This scaling curve is steep, indicating that the game's rendering load at higher resolutions is heavily taxing the GPU.

The pattern is consistent across all settings presets. At Low settings, the 1080p result is 288 FPS, which drops to 186 FPS at 1440p and 101 FPS at 4K. The Medium preset shows 251 FPS at 1080p, 162 FPS at 1440p, and 88 FPS at 4K. Ultra settings yield 173 FPS at 1080p, 112 FPS at 1440p, and 61 FPS at 4K. In every case, the step from 1080p to 1440p costs roughly 35-37% of the frame rate, while the step from 1440p to 4K costs an additional 45-46%. This nonlinear drop suggests that pixel throughput becomes the dominant constraint as resolution climbs.

The 4K results are particularly telling. Even at Low settings, the average FPS at 3840x2160 is 101, which is still playable but far from the 288 FPS seen at 1080p Low. At Ultra settings, 4K dips to 61 FPS average, which is right at the edge of smooth gameplay for fast-paced shooters. The fact that the gap between Low and Ultra at 4K is only 40 FPS (101 vs 61) while at 1080p the gap is 115 FPS (288 vs 173) indicates that at 4K, the GPU is so saturated that settings changes have diminishing returns. The limiting component at 4K is clearly the GPU, as the CPU has ample headroom to feed frames at lower resolutions.

The 1440p results offer the best balance for this combo. At High settings, 137 FPS average provides a smooth experience, and even Ultra at 112 FPS remains fluid. The Medium preset at 1440p shows a min FPS of 138 and max of 187, indicating consistent frame pacing without major dips. This resolution is where the GPU's capabilities align well with the game's demands, avoiding both CPU bottlenecks at 1080p and GPU saturation at 4K.

GPU Role

The NVIDIA GeForce RTX 4080 Mobile is the primary driver of Doom's performance across all tested configurations. Its 12 GB of GDDR6 memory on a 192-bit bus delivers 432.0 GB/s of bandwidth, which is sufficient for Doom's texture-heavy environments at 4K. The GPU's 7424 shading units, 232 texture mapping units, and 80 ROPs handle the game's rendering pipeline efficiently. Clock speeds are listed at 1290 MHz base and 1665 MHz boost, with memory running at 2250 MHz (18 Gbps effective).

The GPU's benchmark profile shows it sits at the 81st percentile among all GPUs, with an average benchmark score of 38135. Its nearest rivals in the synthetic benchmarks include the NVIDIA GeForce MX570 (deltaPct -0.4), NVIDIA GeForce RTX 5080 Mobile (deltaPct -0.6), NVIDIA GeForce RTX 4070 (deltaPct 1.3), and NVIDIA Tesla P4 (deltaPct 1.3). This clustering indicates that the RTX 4080 Mobile is positioned in a competitive tier where small percentage differences separate products. The MX570 matching its score within 0.4% is notable, though the benchmark scores are aggregate figures and Doom's actual performance may differ from synthetic results.

The GPU's Ada Lovelace architecture, built on TSMC's 5 nm process with 35,800 million transistors on a 294 mm² die, provides the foundation for its DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4 API support. Doom, being a Vulkan-capable title, can leverage the GPU's 232 tensor cores and 58 RT cores, though the game itself does not heavily use ray tracing. The FP32 performance of 24.72 TFLOPS and texture rate of 386.3 GTexel/s are the raw throughput figures that translate into the high frame rates observed.

The measured FPS data reveals that the GPU is the bottleneck at 4K. The transition from 1440p High (137 FPS) to 4K High (74 FPS) represents a 46% performance loss, which is consistent with the 2.25x pixel count increase. At 1080p, however, the GPU is not fully utilized in all presets. The jump from 1080p High (212 FPS) to 1440p High (137 FPS) is a 35% drop, which is less than the 56% pixel increase, suggesting some CPU limitation at 1080p. The GPU's 12 GB VRAM is adequate for Doom at all tested settings, as the game was released in 2016 and does not require excessive memory capacity.

FAQ

Q: What is the best resolution for this combo to maintain a high frame rate in Doom?

A: Based on the measured data, 2560x1440 at High settings delivers 137 FPS average, while 1920x1080 at High reaches 212 FPS. The 1440p resolution offers a good balance between visual fidelity and performance, as 4K at High drops to 74 FPS.

Q: How does the RTX 4080 Mobile compare to its nearest rivals in synthetic benchmarks?

A: The GPU's average benchmark score is 38135, with the NVIDIA GeForce MX570 at 38299 (deltaPct -0.4), RTX 5080 Mobile at 38349 (deltaPct -0.6), RTX 4070 at 37648 (deltaPct 1.3), and Tesla P4 at 37628 (deltaPct 1.3). The differences are minimal, all within 1.3%.

Q: Does the CPU bottleneck the GPU at any resolution?

A: At 1920x1080, the frame rates are very high (288 FPS at Low), and the scaling to 1440p shows a 35% drop, which is less than the pixel increase, indicating some CPU limitation at 1080p. At 4K, the GPU is the clear bottleneck.

Q: What settings preset provides the highest minimum FPS at 1440p?

A: The Medium preset at 2560x1440 has a min FPS of 138 and max FPS of 187, with an average of 162 FPS. This provides the most consistent frame pacing among the 1440p options with recorded min/max values.

Q: Is the 12 GB VRAM sufficient for 4K gaming in Doom?

A: Yes, the 12 GB GDDR6 memory with 432.0 GB/s bandwidth is adequate, as the game runs at 74 FPS at 4K High and 61 FPS at 4K Ultra, indicating no memory capacity issues. The game's 2016 release date means it does not demand excessive VRAM.

Q: How does the combo rank among all tested combinations for Doom?

A: The combo ranks 1222 out of 3712 tested combinations, placing it in the top third of all tested systems for this game.

How This Combo Ranks

The AMD Ryzen AI Max+ 395 paired with the NVIDIA GeForce RTX 4080 Mobile achieves a combo rank of 1222 out of 3712 tested combinations for Doom, placing it in the 33rd percentile of all tested systems. This ranking reflects the GPU's 81st percentile position among all GPUs and the CPU's 95th percentile position among all CPUs, but the game-specific performance shows that the combination is not top-tier for this particular title.

The rank suggests that while both components are individually strong, Doom's optimization and the specific demands of this game do not favor this particular pairing as much as other titles might. The GPU's nearest rivals in synthetic benchmarks are separated by less than 1.3%, yet the combo ranking indicates that real-world game performance can diverge from aggregate benchmark scores. The RTX 4080 Mobile's position in the 81st percentile of all GPUs is respectable, but there are many higher-performing GPUs in the database that would push this combo higher in the rankings.

The CPU's percentile ranking of 95 is notably higher than the GPU's 81, suggesting that the processor has more headroom relative to its peers than the graphics card. However, in Doom, the GPU is the limiting factor at higher resolutions, which means the combo's ranking is constrained by the GPU's performance ceiling. The 3712 total tested combinations provide a broad comparison pool, and a rank of 1222 indicates that roughly two-thirds of tested systems outperform this combo in Doom specifically.

CPU Role

The AMD Ryzen AI Max+ 395 is a 16-core, 32-thread processor based on the Zen 5 architecture (Strix Halo codename), manufactured on TSMC's 4 nm process. It runs at a base clock of 3.00 GHz and boosts to 5.10 GHz, with a TDP of 55 W. The CPU features 80 KB of L1 cache per core, 1 MB of L2 per core, and 64 MB of shared L3 cache, totaling a substantial cache hierarchy for game workloads.

The CPU's benchmark results show strong multi-threaded performance: Cinebench R23 multicore scores 35314, Geekbench multicore reaches 20992, and Passmark multithread scores 54934. Single-thread performance is also solid, with Cinebench R23 singlecore at 2044 and Geekbench singlecore at 2464. The CPU's average benchmark score is 77740, placing it at the 95th percentile of all CPUs. Its nearest rivals include the AMD Ryzen Threadripper PRO 9945WX (deltaPct 1.6), AMD EPYC Embedded 8224P (deltaPct 1.6), Intel Core i9-14900K (deltaPct -1.7), and AMD Ryzen 9 8945HX (deltaPct 2).

In Doom, the CPU's role is to feed the GPU with draw calls and game logic. At 1080p, the measured frame rates of 288 FPS at Low and 212 FPS at High suggest the CPU is capable of delivering very high frame rates. The 16 cores and 32 threads are far more than Doom requires, as the game is not heavily multithreaded. The high single-thread performance (Cinebench R15 singlecore score of 316) is more relevant for this game's engine, which relies on a few main threads.

The CPU's memory bandwidth of 256.0 GB/s via quad-channel LPDDR5X is ample for the GPU to access system memory when needed, though the RTX 4080 Mobile has its own dedicated 432.0 GB/s GDDR6 bandwidth. The CPU's PCIe Gen 4 interface with 16 lanes provides sufficient connectivity for the GPU and other components. The data indicates that the CPU is not the bottleneck at 1440p or 4K, as the frame rate drops align more closely with GPU pixel throughput limitations.

Measured FPS Breakdown

At 1920x1080, the AMD Ryzen AI Max+ 395 and RTX 4080 Mobile deliver exceptional performance across all settings. Low settings produce an average of 288 FPS, Medium averages 251 FPS with a min of 213 and max of 289, High averages 212 FPS, and Ultra averages 173 FPS. The gap between Low and Ultra is 115 FPS, showing that settings have a significant impact at this resolution. The Medium preset's min FPS of 213 indicates that even the lowest frames stay well above refresh rate thresholds.

Moving to 2560x1440, performance remains strong but begins to show the GPU's workload. Low settings average 186 FPS, Medium averages 162 FPS with a min of 138 and max of 187, High averages 137 FPS, and Ultra averages 112 FPS. The Medium preset at this resolution provides the most consistent frame delivery, with the min FPS of 138 being 15% higher than the High preset's average. The step from 1080p to 1440p reduces frame rates by 35-37% across all settings, which is less than the 56% pixel increase, suggesting some CPU involvement at 1080p.

At 3840x2160, the GPU becomes the clear limiting factor. Low settings average 101 FPS, Medium averages 88 FPS with a min of 75 and max of 101, High averages 74 FPS, and Ultra averages 61 FPS. The Medium preset at 4K has a min FPS of 75, which is still playable but shows the GPU working near its limits. The spread between Low and Ultra at 4K is only 40 FPS (101 vs 61), compared to 115 FPS at 1080p, demonstrating that settings changes have less impact when the GPU is saturated. The Ultra preset at 4K, with its 61 FPS average, sits right at the threshold for smooth gameplay in a fast-paced FPS.

The data shows a consistent hierarchy: 1080p provides the highest frame rates for competitive play, 1440p offers the best balance of visual quality and performance, and 4K is playable but requires settings adjustments to maintain fluid frame rates. The Medium preset consistently provides the most stable frame pacing, as evidenced by the recorded min and max FPS values at all three resolutions.