Doom

CPU Role — cores, clocks, and how they relate to this game's results

The AMD Ryzen 5 5600GT is a 6-core, 12-thread processor built on the Zen 3 architecture, with a base clock of 3.60 GHz and a boost clock of 4.60 GHz. It carries 16 MB of L3 cache and supports DDR4 memory in dual-channel configuration. This is a 5000-series desktop chip with a 65 W TDP, and it includes integrated Radeon Vega 7 graphics, though that iGPU is irrelevant here given the discrete GPU paired alongside it.

In the context of Doom, a fast-paced FPS from 2016, the CPU’s single-thread performance is the primary driver of frame pacing. The benchmark data shows a single-thread score of 913 in 3DMark and 2438 in Cinebench R23 single-core. These figures place the chip in the 78th percentile of all CPUs, which is respectable for a mid-range processor. The multi-thread results are also solid: a Cinebench R23 multi-core score of 17272 and a Geekbench multi-core score of 7986 indicate that the 5600GT can handle background tasks and game logic without bottlenecking even high-refresh-rate scenarios.

The chip’s nearest rivals in overall average benchmark score include the Intel Core i7-10700 (deltaPct 0%), the Intel Core i5-12490F (deltaPct -0.3%), and the AMD Ryzen 5 5600X (deltaPct 0.3%). The 5600GT essentially sits in a three-way tie with these chips, meaning its processing power is well within the expected bracket for modern gaming at high frame rates. For Doom specifically, which is known for its efficient id Tech engine, the CPU’s 4.60 GHz boost clock helps keep frame times low, especially at 1080p where the GPU is less likely to be the limiting factor.

One important note: the CPU’s PCIe support is Gen 3 with 16 lanes. This means the RTX 5090, which is a PCIe 5.0 card, will run at a reduced bandwidth interface. In most gaming workloads, this does not materially impact frame rates, but it is a structural limitation of the platform. The benchmark results, however, show that Doom still achieves extremely high FPS numbers, so the practical impact is minimal.

GPU Role — VRAM, clocks, and how they relate to this game's results

The NVIDIA GeForce RTX 5090 is a flagship Blackwell 2.0 architecture GPU with 32 GB of GDDR7 memory on a 512-bit bus, delivering a massive 1.79 TB/s of memory bandwidth. The GPU has 21760 shading units, 680 TMUs, and 176 ROPs, with base and boost clocks of 2017 MHz and 2407 MHz respectively. It also features 170 RT cores and 680 tensor cores, supporting DirectX 12 Ultimate, Vulkan 1.4, and OpenGL 4.6.

In Doom, the RTX 5090’s raw rasterization power is the dominant factor. At 1080p with High settings, the combo achieves 315.6 FPS average; at Ultra settings, it still delivers 274.5 FPS. These numbers are far beyond what any display can typically show, but they demonstrate that the GPU is not the bottleneck at lower resolutions. The GPU’s percentile rank is 94th among all GPUs, and its average benchmark score of 84306 places it near the top of the database. Its nearest rivals include the RTX 5090 D (deltaPct 0.1%), RTX 5050 Mobile (deltaPct 0.2%), and AMD Radeon PRO W6600 (deltaPct 1.3%) — the latter being a workstation card that scores surprisingly close in synthetic benchmarks.

The 32 GB VRAM is overkill for Doom, which is a 2016 title with modest texture requirements. However, the sheer memory bandwidth (1.79 TB/s) ensures that even at 4K Ultra, the GPU can feed data to the cores without stalling. The measured FPS at 4K Ultra is 98.8 FPS, which is still very playable, but the drop from 1080p shows that resolution scaling is starting to stress the GPU more heavily.

Resolution Scaling — how FPS drops from 1080p to 4K and what it says about the limiting component

The measured FPS data reveals a clear scaling pattern across resolutions. At 1080p, the combo delivers between 274.5 FPS (Ultra) and 353.2 FPS (Low). Moving to 1440p, the frame rates drop to between 176.8 FPS (Ultra) and 299.9 FPS (Low). At 4K, the range narrows to 98.8 FPS (Ultra) to 163 FPS (Low).

The percentage drops are instructive. From 1080p High (315.6 FPS) to 1440p High (222 FPS), the FPS falls by approximately 29.7%. From 1440p High to 4K High (119.9 FPS), the drop is approximately 46%. This accelerating decline as resolution increases is the classic signature of a GPU-bound scenario. The RTX 5090 is doing most of the heavy lifting at higher resolutions, and the CPU’s role diminishes.

At 1080p Low, the combo hits 353.2 FPS, which is near the theoretical ceiling for many CPUs. The fact that the 5600GT can push beyond 350 FPS in this scenario indicates that its single-thread performance is sufficient. But the gap between 1080p Low (353.2 FPS) and 1080p Ultra (274.5 FPS) is only about 22.3%, showing that even at the same resolution, the GPU is still the primary limiter when settings are increased.

At 4K, the differences between settings become smaller in absolute terms but larger in percentage terms relative to the lower FPS baseline. The jump from 4K Ultra (98.8 FPS) to 4K High (119.9 FPS) is a 21.4% improvement, and from 4K High to 4K Medium (141.6 FPS) is an 18.1% gain. This suggests that the GPU is the clear bottleneck at 4K, and lowering settings yields diminishing returns as the engine’s fixed costs become more prominent.

FAQ

Q: What is the frame rate at 1080p with High settings for this combo?

A: The AMD Ryzen 5 5600GT and NVIDIA GeForce RTX 5090 combo achieves an average of 315.6 FPS at 1920x1080 with High settings in Doom.

Q: How does the CPU compare to its nearest rival in benchmark scores?

A: The Ryzen 5 5600GT has an average benchmark score of 20740, which is essentially tied with the Intel Core i7-10700 (20746, deltaPct 0%) and the AMD Ryzen 5 5600X (20680, deltaPct 0.3%). It trails the Intel Core i5-12490F by just 0.3%.

Q: Does the GPU bottleneck at 4K Ultra settings?

A: Yes. At 3840x2160 with Ultra settings, the combo averages 98.8 FPS, compared to 274.5 FPS at 1080p Ultra. The steep drop indicates the RTX 5090 is the limiting component at 4K.

Q: What is the memory bandwidth of the RTX 5090?

A: The RTX 5090 has 32 GB of GDDR7 memory on a 512-bit bus, providing a bandwidth of 1.79 TB/s.

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

A: This combo ranks 44th out of 1681 tested combinations for Doom, placing it in the top 2.6% of all configurations.

Q: What is the CPU’s boost clock and how does it affect gaming?

A: The Ryzen 5 5600GT has a boost clock of 4.60 GHz. This high frequency helps maintain low frame times in Doom, especially at 1080p where the CPU is more relevant.

How This Combo Ranks

The combo of the AMD Ryzen 5 5600GT and NVIDIA GeForce RTX 5090 ranks 44th out of 1681 tested combinations for Doom. This places it in the top 2.6% of all configurations in the database. The ranking is impressive given the CPU is a mid-range 5000-series chip, while the GPU is a flagship Blackwell part.

The high rank is driven almost entirely by the GPU’s dominance. The RTX 5090’s 94th percentile standing among all GPUs, combined with its massive 32 GB VRAM and 1.79 TB/s bandwidth, ensures that Doom runs at extremely high frame rates across all resolutions and settings. The CPU, while not top-tier, is sufficient to avoid holding back the GPU in most scenarios, as evidenced by the 1080p Low result of 353.2 FPS.

However, the rank of 44 also highlights that there are 43 other combos that perform better. These likely feature faster CPUs (such as newer Ryzen 7000/9000 series or Intel Core i9 parts) paired with the same RTX 5090 or similar flagship GPUs. In Doom, which is not heavily threaded, the CPU’s single-thread performance (3DMark single-thread score of 913) is adequate but not class-leading. At 4K, where the GPU is the bottleneck, the CPU’s limitations are masked, but at 1080p, a faster CPU could push the FPS even higher.

The data shows that this combo is a strong performer for Doom, but it is not the absolute best. The 44th rank out of 1681 confirms the RTX 5090’s raw power, while the 5600GT serves as a capable, if not spectacular, companion. For gamers targeting 4K High or Ultra settings, this combo delivers smooth, playable frame rates (119.9 FPS at 4K High, 98.8 FPS at 4K Ultra) that are well above the 60 FPS threshold. At 1440p, the results are even more impressive, with 222 FPS at High settings. The bottleneck is clearly the GPU at higher resolutions, and the CPU only becomes relevant at 1080p where frame rates exceed 300 FPS.