Doom

Resolution Scaling

The measured FPS data for Doom with the AMD Ryzen 7 5700 and AMD Radeon RX 6650 XT shows a clear pattern of performance scaling as resolution increases. At 1920x1080 with Low settings, the combination produces an average of 200.6 FPS. Moving to 2560x1440 at the same Low preset drops the average to 130.4 FPS, a reduction of approximately 35%. The jump to 3840x2160 at Low settings yields 70.4 FPS, which is roughly 46% lower than the 1440p result. This progressive decline indicates that the GPU becomes the dominant limiting factor as pixel count rises.

The scaling behavior is consistent across all settings presets. At High settings, the frame rate falls from 145.7 FPS at 1080p to 93.4 FPS at 1440p, then to 50.7 FPS at 4K. The Ultra preset follows a similar trajectory: 118.6 FPS at 1080p, 76.9 FPS at 1440p, and 44 FPS at 4K. The gap between 1080p and 1440p is proportionally smaller than the gap between 1440p and 4K, suggesting that the GPU's compute resources and memory bandwidth become increasingly strained at higher resolutions.

The RX 6650 XT has 8 GB of GDDR6 memory on a 128-bit bus, with a bandwidth of 280.3 GB/s. At 4K, the memory subsystem is likely under significant pressure, particularly with Ultra settings which demand more texture data and shading work. The 4K Ultra result of 44 FPS sits below the 60 FPS threshold commonly considered smooth for fast-paced shooters, while the 4K High result of 50.7 FPS is also below that mark. Only the 4K Low preset, at 70.4 FPS, crosses into playable territory at this resolution.

The data indicates that the Ryzen 7 5700, with its 8 cores and 16 threads, is not the bottleneck in most scenarios. The CPU's 3dmark_single_thread score of 901 and 3dmark_16_threads score of 6628 suggest ample headroom for this title. The limiting component shifts decisively to the GPU as resolution climbs, which is typical for a well-optimized FPS like Doom.

CPU Role

The AMD Ryzen 7 5700 is a Zen 3 architecture processor built on a 7 nm process, featuring 8 cores and 16 threads. Its base clock is 3.70 GHz with a boost clock of 4.60 GHz. The CPU has 16 MB of L3 cache, with 512 KB of L2 cache per core and 64 KB of L1 cache per core. This configuration delivers strong multi-threaded performance, as reflected in a Cinebench R23 multicore score of 20655 and a single-core score of 2916.

In Doom, the CPU's role is primarily to feed the GPU with draw calls and game logic. The benchmark results show that at 1080p Low, the frame rate reaches 200.6 FPS, which is a high enough value that the CPU's per-core performance becomes relevant. The 3dmark_2_threads score of 1762 and 3dmark_4_threads score of 3382 indicate that the processor handles lightly threaded workloads well. Doom's id Tech 6 engine scales across multiple cores, and the Ryzen 7 5700's 16 threads provide sufficient parallelism.

The CPU's percentile rank of 84 among all processors places it above the majority of CPUs. Its nearest rival, the Intel Core i9-9900K, has an average benchmark score of 27043, which is only 0.7% higher than the Ryzen 7 5700's average of 27220. This near-parity suggests that the CPU is not a weak point in this system. Even at 4K, where the GPU is clearly the bottleneck, the CPU maintains enough throughput to avoid dragging down frame rates.

The 65 W TDP of the Ryzen 7 5700 is notably modest for an 8-core processor, which means the CPU is unlikely to throttle under sustained gaming loads. The dual-channel DDR4 memory support with 51.2 GB/s bandwidth is adequate for this title, as Doom does not heavily stress memory bandwidth compared to some other modern games. The CPU's performance in the Passmark physics test (984) and Passmark single-thread test (3296) further confirms its capability for gaming workloads.

GPU Role

The AMD Radeon RX 6650 XT is built on the RDNA 2.0 architecture with the Navi 23 chip, fabricated on a 7 nm process. It has 2048 shading units, 128 texture mapping units, and 64 raster operation units. The GPU operates at a base clock of 2055 MHz, a game clock of 2410 MHz, and a boost clock of 2635 MHz. Memory runs at 2190 MHz, translating to 17.5 Gbps effective, across a 128-bit bus for 8 GB of GDDR6 VRAM.

The GPU's memory bandwidth of 280.3 GB/s is a critical specification for Doom's performance at higher resolutions. The data shows that 4K Ultra produces only 44 FPS, which is a 22% drop from the 4K High result of 50.7 FPS. This steep decline suggests that the Ultra preset's additional texture detail and shadow quality push the memory subsystem and shading units to their limits. The 8 GB VRAM capacity is sufficient for 1080p and 1440p, but 4K Ultra assets may approach capacity limits.

The RX 6650 XT delivers a Passmark G3D score of 17166 and a Geekbench Vulkan score of 93769, indicating solid DirectX 12 and Vulkan performance. Doom's Vulkan support is well-documented, and the GPU's Vulkan 1.4 API support allows efficient multi-threaded rendering. The FP32 throughput of 10.79 TFLOPS provides the raw compute power needed for the game's particle effects and lighting calculations.

The GPU's percentile rank of 72 places it below the CPU's rank of 84, which aligns with the observed bottleneck behavior. At 1080p, the GPU is still the primary limiter, as evidenced by the 44% difference between Low (200.6 FPS) and Ultra (118.6 FPS) at that resolution. The nearest GPU rival, the AMD Radeon RX 6800M, has an average score of 29011, nearly identical to the RX 6650 XT's 29024. This parity indicates that the card performs at the expected level for its class.

Settings Recommendations

The measured FPS data provides clear guidance on which settings preset offers the best balance of visual quality and frame rate. At 1920x1080, the High preset achieves 145.7 FPS, which is well above the 60 FPS threshold and offers substantial visual improvements over Low. The Medium preset at 176.4 FPS provides a higher frame rate but with reduced visual fidelity. For competitive play, the Low preset at 200.6 FPS offers the highest refresh rate potential, but the trade-off in visual quality may not be worth the 38% FPS gain over High.

At 2560x1440, the High preset delivers 93.4 FPS, which remains smooth for most displays. The Medium preset at 114.8 FPS provides a comfortable margin above 100 FPS, while the Ultra preset at 76.9 FPS is still playable but approaches the lower end of what is desirable for a fast-paced shooter. The Low preset at 130.4 FPS is the best choice for high-refresh-rate monitors at this resolution.

For 3840x2160, the situation is more constrained. The Ultra preset at 44 FPS is below the playable threshold for most users, and the High preset at 50.7 FPS is marginal. The Medium preset at 61.8 FPS crosses into acceptable territory, while the Low preset at 70.4 FPS offers the most comfortable experience. Given the significant FPS drops at 4K, the recommended preset is Medium for users who prioritize smoothness, or High for those who accept lower frame rates in exchange for better visuals.

The data suggests that the High preset at 1440p is the sweet spot for this hardware combination, offering 93.4 FPS with good visual quality. At 1080p, High at 145.7 FPS is the best overall choice, as it balances frame rate and fidelity without pushing the GPU to its limits.

FAQ

Q: What is the highest average FPS achievable with this hardware at 1080p?

A: The Low preset at 1920x1080 produces the highest average FPS of 200.6. The Medium preset achieves 176.4 FPS, High reaches 145.7 FPS, and Ultra yields 118.6 FPS.

Q: Is the AMD Ryzen 7 5700 a bottleneck for the RX 6650 XT in Doom?

A: The data indicates the CPU is not the primary limiter. At 1080p Low, the system reaches 200.6 FPS, and the CPU's average benchmark score of 27220 is 0.7% higher than the Intel Core i9-9900K's 27043, suggesting sufficient headroom.

Q: Can this system run Doom at 4K with acceptable performance?

A: At 4K, the Low preset averages 70.4 FPS, Medium averages 61.8 FPS, High averages 50.7 FPS, and Ultra averages 44 FPS. Only Low and Medium are above 60 FPS.

Q: How does the RX 6650 XT compare to its closest GPU rival?

A: The AMD Radeon RX 6800M has an average score of 29011, while the RX 6650 XT scores 29024, a delta of 0%. This indicates near-identical overall performance.

Q: What is the frame rate difference between High and Ultra at 1440p?

A: At 2560x1440, High averages 93.4 FPS while Ultra averages 76.9 FPS, representing a 16.5 FPS reduction for the Ultra preset's additional visual features.

Q: Does the 8 GB VRAM on the RX 6650 XT cause issues at higher resolutions?

A: The performance drop from 1440p to 4K is substantial across all presets, with 4K High at 50.7 FPS versus 1440p High at 93.4 FPS. This suggests VRAM capacity and bandwidth are contributing factors at 4K.

Measured FPS Breakdown

1920x1080:

• Low: 200.6 FPS average
• Medium: 176.4 FPS average
• High: 145.7 FPS average
• Ultra: 118.6 FPS average

2560x1440:

• Low: 130.4 FPS average
• Medium: 114.8 FPS average
• High: 93.4 FPS average
• Ultra: 76.9 FPS average

3840x2160:

• Low: 70.4 FPS average
• Medium: 61.8 FPS average
• High: 50.7 FPS average
• Ultra: 44 FPS average

The full dataset shows a consistent ordering across all resolutions, with Low always providing the highest frame rate and Ultra the lowest. At 1080p, the spread between Low and Ultra is 82 FPS, which narrows to 53.5 FPS at 1440p and 26.4 FPS at 4K. This narrowing spread at higher resolutions confirms that the GPU becomes increasingly saturated, reducing the relative impact of settings changes. The combination's rank of 1077 out of 1681 combos in this game indicates it sits in the upper-middle tier of tested hardware configurations.