Doom

The AMD Ryzen 9 8945HX paired with the NVIDIA GeForce RTX 5070 Ti Mobile delivers a robust 1080p and 1440p experience in Doom, while 4K remains playable but demands settings adjustments. This combination places 1396th out of 3712 tested combos for this title, a ranking that reflects a strong balance between the 16-core Zen 4 processor and the Blackwell-based mobile GPU, though it is not at the absolute top of the charts. Benchmark data indicates that the system excels at high refresh rate 1080p gameplay, maintains excellent frame rates at 1440p, and drops to a playable but less fluid 4K experience, with the GPU becoming the primary limiting factor at higher resolutions.

Resolution Scaling

The measured FPS data reveals a clear and consistent scaling pattern as resolution increases from 1920x1080 to 3840x2160. At High settings, the average frame rate drops from 194 FPS at 1080p to 126 FPS at 1440p, a reduction of 68 FPS, and then further declines to 68 FPS at 4K, halving the 1440p figure. This progression indicates that the RTX 5070 Ti Mobile is the dominant component at higher resolutions, as the workload on the GPU increases quadratically with pixel count.

At Low settings, the scaling is even more pronounced in absolute terms. The 1080p average of 264 FPS falls to 171 FPS at 1440p and then to 93 FPS at 4K. This 171 FPS swing from 1080p to 4K demonstrates that even with reduced graphical load, the GPU’s rendering capacity is heavily taxed at 3840x2160. The fact that Low settings at 4K still achieve only 93 FPS, compared to 264 FPS at 1080p, suggests that the pixel throughput requirement is the bottleneck, not the CPU or memory subsystem.

Medium settings show a similar trend, with 230 FPS at 1080p, 149 FPS at 1440p, and 81 FPS at 4K. The drop from 1440p to 4K is 68 FPS, which is nearly identical to the drop seen at High settings (58 FPS) and Low settings (78 FPS). This consistency across settings implies that resolution scaling is primarily a function of the GPU’s fill rate and shading capacity, rather than being influenced by CPU-bound scenarios at lower resolutions.

Ultra settings produce the lowest frame rates across all resolutions, with 159 FPS at 1080p, 103 FPS at 1440p, and 56 FPS at 4K. The 4K Ultra result of 56 FPS is the only measured configuration that dips below the 60 FPS threshold, indicating that this setting is too demanding for 3840x2160 on this hardware. The scaling from 1080p to 1440p at Ultra is a 56 FPS drop, and from 1440p to 4K is a 47 FPS drop, showing a slightly less steep curve than lower settings, likely due to other bottlenecks such as memory bandwidth or shader occupancy.

The data indicates that at 1080p, the CPU has ample headroom, as even Ultra settings achieve 159 FPS, which is well above typical high refresh rate displays. At 1440p, the GPU begins to assert its dominance, but the combination still maintains over 100 FPS at Ultra. At 4K, the GPU is clearly the limiting component, as the frame rates across all settings are significantly lower, and the gap between Low and Ultra narrows to just 37 FPS (93 vs 56), suggesting that the GPU is saturated regardless of the graphical complexity.

How This Combo Ranks

In Doom, this specific CPU-GPU combination achieves a rank of 1396 out of 3712 tested combos, placing it in the top 37.6% of all configurations. This ranking reflects a balanced system that is capable of high performance but is not among the elite tier of combinations. The CPU’s percentile versus all CPUs is 95, indicating that the Ryzen 9 8945HX is in the top 5% of all processors tested, while the GPU’s percentile versus all GPUs is 80, placing it in the top 20%.

The CPU’s nearest rivals provide context for its performance. The Intel Core Ultra 9 285HX has an average benchmark score of 76155, which is just 0.1% higher than the Ryzen 9 8945HX’s 76212. This negligible delta means the two processors are effectively tied in synthetic benchmarks. The AMD EPYC Embedded 8224P and AMD Ryzen Threadripper PRO 9945WX both score slightly higher at 76492 and 76513, respectively, representing deltas of -0.4% relative to the 8945HX. The AMD Ryzen 9 9950X3D scores 75779, which is 0.6% lower. These small percentage differences indicate that the CPU is not a differentiator in this combo’s ranking; its performance is squarely in line with other high-end desktop and mobile parts.

The GPU’s nearest rivals show a different picture. The NVIDIA Quadro GV100 has an average score of 35520, which is 0.2% higher than the RTX 5070 Ti Mobile’s 35435. The AMD Radeon Pro Duo scores 35860, a 1.2% advantage, while the NVIDIA A2 scores 34690, which is 2.1% lower. The NVIDIA T1000 scores 36289, a 2.4% advantage. These deltas are small, ranging from -2.4% to +2.1%, suggesting that the RTX 5070 Ti Mobile is competitively positioned against these workstation-oriented GPUs, though none of them are modern gaming parts.

The combo rank of 1396 out of 3712 suggests that while the individual components are strong, the overall system performance in Doom is influenced by factors beyond raw silicon capability. The 4K results, where the GPU is the bottleneck, likely drag the combo’s rank down compared to configurations with more powerful desktop GPUs. At 1080p and 1440p, the rank would be significantly higher, as the frame rates are excellent, but the aggregate rank considers all resolutions and settings, including the demanding 4K Ultra scenario.

GPU Role

The NVIDIA GeForce RTX 5070 Ti Mobile is built on the Blackwell 2.0 architecture with the GB205 chip, fabricated on a 5 nm process at TSMC. It features 5888 shading units, 184 texture mapping units, and 80 raster output units, along with 46 ray tracing cores and 184 tensor cores. The GPU operates at a base clock of 847 MHz and a boost clock of 1447 MHz, which are relatively modest clocks for a high-end mobile part, reflecting the 60 W TDP limit.

Memory configuration is a key factor in the 4K performance. The GPU has 12 GB of GDDR7 memory on a 192-bit bus, providing a bandwidth of 672.0 GB/s. This bandwidth is substantial for a mobile GPU but becomes a limiting factor at 3840x2160, where the pixel data required per frame is four times that of 1080p. The 4K results show that even at Low settings, the average FPS is only 93, which suggests that the memory bandwidth or the GPU’s compute throughput is saturated.

The GPU’s average benchmark score is 35435, with a percentile versus all GPUs of 80. In synthetic tests, it achieves a Passmark G3D score of 24004 and a Geekbench OpenCL score of 143870. These scores indicate strong compute performance, but the game-specific results are more telling. The FP32 performance is rated at 17.04 TFLOPS, which is sufficient for Doom’s Vulkan-based rendering, but the 4K Ultra result of 56 FPS shows that the GPU is pushed to its limits with maximum settings.

The GPU’s texture rate of 266.2 GTexel/s and pixel rate of 115.8 GPixel/s are directly relevant to Doom’s rendering workload. At 4K, the pixel rate becomes critical, and the 56 FPS at Ultra suggests that the ROPs are not able to keep up with the 8.3 million pixels per frame (3840x2160) when combined with high-quality shading and effects. The 12 GB VRAM is ample for Doom, as the game’s textures are not excessively demanding, so VRAM capacity is not the bottleneck; rather, it is the raw processing power.

Measured FPS Breakdown

At 1920x1080, the combination delivers exceptional performance across all settings. Low settings produce an average of 264 FPS, which is the highest measured result in the entire dataset. Medium settings achieve 230 FPS, with a minimum of 196 FPS and a maximum of 265 FPS, indicating consistent frame pacing. High settings drop to 194 FPS, while Ultra settings still manage 159 FPS. All 1080p results exceed 144 Hz, making this an ideal configuration for high refresh rate monitors.

At 2560x1440, the performance remains strong but shows the GPU’s increasing workload. Low settings average 171 FPS, which is a 35.2% drop from 1080p. Medium settings average 149 FPS, with a minimum of 127 FPS and maximum of 171 FPS, showing a tighter range than at 1080p. High settings average 126 FPS, and Ultra settings dip to 103 FPS. These results indicate that 1440p is a sweet spot for this combo, as even Ultra settings maintain above 100 FPS.

At 3840x2160, the GPU becomes the clear bottleneck. Low settings average 93 FPS, which is a 45.6% drop from 1440p and a 64.8% drop from 1080p. Medium settings average 81 FPS, with a minimum of 69 FPS and maximum of 93 FPS, showing a wider variance. High settings average 68 FPS, and Ultra settings fall to 56 FPS. The 4K results are playable at Low and Medium settings, but High and Ultra push the GPU beyond its comfortable range, with Ultra dipping below 60 FPS.

The min and max FPS data is only available for Medium settings at each resolution. At 1080p Medium, the range is 196 to 265 FPS, a spread of 69 FPS. At 1440p Medium, the range is 127 to 171 FPS, a spread of 44 FPS. At 4K Medium, the range is 69 to 93 FPS, a spread of 24 FPS. This narrowing range at higher resolutions indicates that the GPU is more consistently saturated, with less variance in frame times, which is typical of GPU-bound scenarios.

CPU Role

The AMD Ryzen 9 8945HX is a 16-core, 32-thread processor based on the Zen 4 architecture, codenamed Dragon Range. It has a base clock of 2.50 GHz and a boost clock of 5.40 GHz, with a 55 W TDP. The CPU is fabricated on TSMC’s 5 nm process and features 64 MB of L3 cache, along with 1 MB of L2 cache per core and 64 KB of L1 cache per core. This large cache hierarchy is beneficial for gaming, as it reduces memory latency for frequently accessed data.

In Doom, the CPU’s role is primarily to feed the GPU with draw calls and physics calculations. At 1080p, where the GPU is less stressed, the CPU’s performance becomes more relevant. The fact that the 8945HX can sustain 264 FPS at Low settings indicates that it is not a bottleneck at this resolution. The CPU’s Cinebench R23 multi-core score of 42713 and single-core score of 6030 suggest strong per-thread performance, which is critical for games that rely on a few main threads.

The CPU’s nearest rivals in synthetic benchmarks show that it is competitive with the Intel Core Ultra 9 285HX, which scores 76155 on average versus the 8945HX’s 76212. This 0.1% difference is negligible in gaming. The AMD Ryzen 9 9950X3D, which has a 0.6% lower average score, may have different cache characteristics, but the data does not indicate a significant impact on Doom’s performance.

The CPU’s memory bandwidth of 83.2 GB/s, provided by dual-channel DDR5, is sufficient for Doom’s requirements. The game does not heavily stress memory bandwidth, and the 12 GB GDDR7 on the GPU has its own 672.0 GB/s bandwidth, so the CPU’s memory subsystem is unlikely to be a limiting factor. The CPU’s PCIe Gen 5 interface with 28 lanes (CPU only) ensures that the GPU has ample bandwidth for data transfer, though Doom is not particularly bandwidth-intensive.

The 8945HX’s Passmark multi-thread score of 51405 and single-thread score of 3907 indicate strong overall performance. In Doom, the 16 cores and 32 threads are more than adequate, as the game is not highly multi-threaded. The CPU’s boost clock of 5.40 GHz is beneficial for single-threaded performance, and the data shows that at 1080p, the CPU can keep up with the GPU’s output, as evidenced by the 264 FPS result.

FAQ

Q: What is the highest average FPS this combo achieves in Doom?

A: The highest average FPS is 264, achieved at 1920x1080 resolution with Low settings.

Q: Can this combo maintain 60 FPS at 4K Ultra settings?

A: No, at 3840x2160 with Ultra settings, the average FPS is 56, which is below the 60 FPS threshold.

Q: How does the CPU compare to its nearest rival in synthetic benchmarks?

A: The Ryzen 9 8945HX has an average benchmark score of 76212, which is 0.1% higher than the Intel Core Ultra 9 285HX’s 76155.

Q: What is the FPS difference between 1080p and 4K at High settings?

A: At High settings, the average FPS drops from 194 at 1920x1080 to 68 at 3840x2160, a difference of 126 FPS.

Q: What is the GPU’s memory bandwidth, and does it affect 4K performance?

A: The GPU has a memory bandwidth of 672.0 GB/s, and the 4K results suggest this is a limiting factor, as even Low settings only achieve 93 FPS.

Q: How many combos does this CPU-GPU pair rank above in Doom?

A: This combo ranks 1396th out of 3712 tested combos, meaning it ranks above 2316 other combinations.

Settings Recommendations

Based on the measured FPS data, the optimal settings depend on the target resolution and refresh rate. At 1920x1080, all settings are viable, but Ultra settings provide the best visual quality while still achieving 159 FPS, which is suitable for high refresh rate displays. For users prioritizing maximum frame rates, Low settings at 264 FPS are the choice, but the visual trade-off is significant.

At 2560x1440, Ultra settings average 103 FPS, which is above the 100 FPS threshold for smooth gameplay on most monitors. This is the recommended setting for 1440p, as it delivers the best image quality without sacrificing playability. High settings at 126 FPS offer a 22.3% increase over Ultra, which may be preferable for users with 144 Hz displays, but the visual difference between High and Ultra in Doom is often subtle.

At 3840x2160, Ultra settings are not recommended, as the 56 FPS average falls below 60 FPS and may result in noticeable stuttering. Medium settings at 81 FPS provide a good balance, with a minimum of 69 FPS ensuring that frame times remain mostly above 60 FPS. Low settings at 93 FPS are the best choice for 4K gaming, as they offer a 14.8% improvement over Medium and ensure a smoother experience. High settings at 68 FPS are borderline, but the 4K Medium configuration is the most balanced for this resolution.

For the best overall experience, the data suggests using Ultra settings at 1440p, as this combination achieves 103 FPS while maximizing visual fidelity. At 4K, Medium settings are the recommended compromise, providing 81 FPS with a minimum of 69 FPS, which is acceptable for most players. At 1080p, Ultra settings are the clear recommendation, as the 159 FPS result is well above the refresh rate of most monitors, and the visual quality is uncompromised.