Doom

# How This Combo Ranks

The Intel Core Ultra 9 275HX paired with the NVIDIA GeForce RTX 5080 achieves a rank of 745 out of 2,930 tested combinations in Doom. This places the combo in the top 25.4% of all tested systems, a solid but not dominant position for a flagship-class mobile CPU and high-end desktop GPU pairing. The ranking reflects the game's age and its relatively modest demands on modern hardware, where even mid-range components can achieve high frame rates, compressing the performance spread at the top.

Benchmark data shows the combo's average FPS across all tested settings and resolutions sits comfortably above playable thresholds, but the rank indicates that a significant number of other configurations—likely with higher-clocked desktop CPUs or more aggressive GPU settings—outperform it. The 275HX, despite its 24 cores and 5.40 GHz boost clock, is a mobile part with a 55W TDP, which may limit sustained performance compared to desktop counterparts. The RTX 5080, with its 16 GB of GDDR7 memory and 960.0 GB/s bandwidth, provides ample graphics horsepower, yet the combo's overall position suggests the CPU may be the constraining factor in certain scenarios, particularly at lower resolutions where frame rates approach 309 FPS.

# GPU Role

The NVIDIA GeForce RTX 5080 is built on the Blackwell 2.0 architecture using TSMC's 5 nm process, housing 45,600 million transistors on a 378 mm² die. Its 16 GB of GDDR7 memory operates at 1875 MHz (30 Gbps effective), delivering 960.0 GB/s of bandwidth across a 256-bit bus. This memory configuration is critical for Doom's high-texture environments, allowing the GPU to maintain consistent frame times even when streaming large amounts of scene data at 4K resolution.

The GPU's clock speeds—2295 MHz base and 2617 MHz boost—combined with 10,752 shading units and 112 ROPs, yield a pixel rate of 293.1 GPixel/s and a texture rate of 879.3 GTexel/s. In Doom, the measured FPS data shows the GPU's performance scales predictably with settings. At 1080p, the difference between Low and Ultra settings is substantial: 309 FPS versus 186 FPS, a 66% drop. This indicates that even at 1080p, the GPU is doing significant work as settings increase, but the CPU's capability to feed the GPU becomes more apparent at lower settings where frame rates exceed 300 FPS.

At 4K, the GPU's role becomes more dominant. The RTX 5080 maintains 80 FPS on High settings and 65 FPS on Ultra, showing that the 16 GB VRAM and 960.0 GB/s bandwidth are sufficient to handle the game's highest visual fidelity without memory bottlenecks. The GPU's nearest rival, the AMD Radeon RX 9070 GRE, scores 2.2% higher in average benchmark, while the AMD Radeon 8060S trails by 0.6%, indicating the 5080 sits in a competitive mid-high tier. Its 87th percentile ranking among all GPUs underscores that while not the absolute top, it delivers performance well above the median for demanding titles.

# Resolution Scaling

The measured FPS data reveals clear scaling patterns across resolutions. At 1080p, the combo achieves 227 FPS on High, which rises to 309 FPS on Low and falls to 186 FPS on Ultra. Moving to 1440p, High settings yield 147 FPS, a 35% reduction from 1080p, while Low drops to 200 FPS (35% lower) and Ultra to 120 FPS (35% lower). This consistent ~35% penalty across all settings from 1080p to 1440p indicates the GPU is becoming the primary limiter, as the CPU has headroom to spare at these lower resolutions.

The jump to 4K amplifies this trend. At 2160p, High settings produce 80 FPS, which is 45.6% lower than the 1440p result. Low settings at 4K yield 108 FPS, a 46% drop from 1440p, while Ultra falls to 65 FPS, a 45.8% reduction. The near-uniform percentage drops from 1440p to 4K across all settings—around 46%—strongly suggest the GPU is now the sole bottleneck. The CPU's contribution diminishes as resolution increases, since the rendering pipeline becomes more pixel-bound. Notably, at 4K Low, the combo still achieves 108 FPS, demonstrating that the RTX 5080's raw compute (56.28 TFLOPS FP32) is more than adequate for Doom even at maximum pixel counts, but the scaling shows diminishing returns as settings increase.

# Settings Recommendations

For 1080p gaming, the data shows that Medium settings at 269 FPS offer the best balance, as the jump from Medium to High (227 FPS) costs 15.6% performance while visual gains are typically marginal in Doom's fast-paced action. Low settings at 309 FPS are excessive for any standard 144Hz or even 240Hz display, making the extra 40 FPS over Medium largely wasted. Ultra at 186 FPS still provides a high frame rate but sacrifices 30.9% of the Medium score for visual improvements that may be imperceptible during gameplay.

At 1440p, High settings at 147 FPS are the sweet spot, providing well above 144Hz refresh rates for most monitors. Medium at 174 FPS offers a 18.4% boost over High with only minor visual degradation, making it the optimal choice for competitive play. Ultra at 120 FPS remains above 60Hz but drops below the 144Hz threshold, so it is only recommended for gamers prioritizing maximum visual fidelity over frame rate. Low at 200 FPS is excessive for typical 1440p displays.

For 4K, the recommendation shifts to High settings at 80 FPS, which is just above the 60Hz baseline and provides good visual quality. Medium at 94 FPS offers a 17.5% improvement over High and is the better choice for smoother motion, while Ultra at 65 FPS is playable but risks noticeable frame pacing in intense combat. Low at 108 FPS is viable for high-refresh 4K displays but sacrifices significant visual detail. Overall, Medium at 1440p or High at 4K provides the best measured experience per the data.

# FAQ

Q: Does the Intel Core Ultra 9 275HX bottleneck the RTX 5080 in Doom?

A: At 1080p, the data indicates potential CPU limitation, as frame rates reach 309 FPS on Low settings. The 275HX's 24 cores and 24 threads, with a boost clock of 5.40 GHz, are powerful, but the mobile 55W TDP may limit sustained performance. At 4K, the GPU becomes the clear bottleneck, with performance dropping ~46% from 1440p across all settings.

Q: How does the RTX 5080's VRAM affect 4K performance?

A: The 16 GB of GDDR7 memory with 960.0 GB/s bandwidth is sufficient for Doom at 4K Ultra, which achieves 65 FPS. The memory configuration does not appear to cause any frame drops, as even the 4K Ultra setting maintains a playable average without min FPS data suggesting stutter.

Q: Is the combo ranked higher than its rivals in Doom specifically?

A: The combo ranks 745th out of 2,930 tested combinations. The GPU's nearest rival, the AMD Radeon RX 9070 GRE, has a 2.2% higher average benchmark score, while the CPU's nearest rival, the Intel Xeon w5-3525, scores 0.3% lower. These rival positions do not directly translate to Doom performance, but they provide context.

Q: What is the best resolution for competitive play?

A: At 1440p Medium, the combo achieves 174 FPS with a minimum of 148 FPS, ensuring consistent high-refresh gameplay. At 1080p Medium, 269 FPS is possible, but the 1440p result offers better visual clarity while still exceeding 144Hz.

Q: How does the RTX 5080's architecture contribute to Doom's performance?

A: The Blackwell 2.0 architecture, with 84 RT cores and 336 tensor cores, provides 56.28 TFLOPS of FP32 compute. Doom's Vulkan rendering benefits from this raw throughput, as shown by the 80 FPS at 4K High, though the game does not heavily utilize ray tracing or DLSS features.

Q: Does the CPU's cache configuration impact frame rates?

A: The 275HX has 36 MB of shared L3 cache and 3 MB per-core L2 cache. The benchmark data shows that at 1080p Low (309 FPS), the CPU is likely the limiting factor, and the cache hierarchy plays a role in maintaining high instruction throughput. However, at higher resolutions, the GPU's workload dominates, reducing the CPU cache's significance.

# CPU Role

The Intel Core Ultra 9 275HX is a 24-core, 24-thread mobile processor based on the Arrow Lake-HX architecture, built on TSMC's 3 nm process. Its base clock of 2.70 GHz and boost clock of 5.40 GHz, combined with 36 MB of shared L3 cache, position it as a high-end mobile part. The CPU's 94th percentile ranking among all processors indicates strong overall performance, but its 55W TDP may limit sustained boost clocks under heavy load.

In Doom, the CPU's role varies by resolution. At 1080p Low, the combo reaches 309 FPS, which approaches the limits of what the CPU can feed to the GPU. The 24 cores and 24 threads are more than sufficient for Doom's multithreaded engine, but the game's frame rate ceiling at lower settings is likely constrained by the CPU's single-thread performance, as indicated by its Cinebench R23 single-core score of 2,204 points. The CPU's PassMark single-thread score of 4,713 further supports this, showing strong but not class-leading per-core capability.

At 1440p and 4K, the CPU's influence diminishes. The consistent FPS drops from 1080p to 1440p (35%) and 1440p to 4K (46%) across all settings suggest the GPU becomes the dominant factor. The CPU's memory bandwidth of 102.4 GB/s via dual-channel DDR5 is adequate for feeding the GPU, but it is not a bottleneck at higher resolutions where the GPU's 960.0 GB/s memory bandwidth takes over. The CPU's nearest rivals, such as the Intel Xeon w5-3525 (0.3% lower score) and AMD EPYC 4484PX (0.5% lower), are workstation-class parts, indicating the 275HX holds its own against server-grade silicon in general benchmarks, though Doom's gaming workload favors the GPU.

# Measured FPS Breakdown

At 1920x1080, the combo delivers its highest frame rates. Low settings achieve 309 FPS average, Medium reaches 269 FPS with a minimum of 229 FPS and maximum of 310 FPS, High hits 227 FPS, and Ultra produces 186 FPS. The spread from Low to Ultra is 123 FPS, a 39.8% reduction at the top end.

At 2560x1440, performance scales down uniformly. Low settings yield 200 FPS, Medium averages 174 FPS (min 148, max 200), High achieves 147 FPS, and Ultra drops to 120 FPS. The ratio between Low and Ultra is 1.67x, consistent with the 1080p ratio of 1.66x, showing the GPU scales predictably with settings at this resolution.

At 3840x2160, the 4K results show a steeper degradation. Low settings produce 108 FPS, Medium averages 94 FPS (min 80, max 109), High hits 80 FPS, and Ultra falls to 65 FPS. The Low-to-Ultra ratio is 1.66x, matching the other resolutions, but the absolute values are substantially lower, confirming the GPU's workload dominance. The minimum FPS data for Medium at 4K (80 FPS) matches the High average, indicating frame time consistency at this setting.

Across all resolutions, the Medium preset consistently offers the best balance of average FPS and minimum FPS stability. At 1080p, Medium's minimum of 229 FPS is only 9.9% below its average, while at 4K, the minimum of 80 FPS is 14.9% below the 94 FPS average. The data shows no anomalies or frame drops that would suggest driver issues or thermal throttling, with the combo maintaining playable performance even at the most demanding settings.