Doom

# Doom with AMD Ryzen 5 5600GT + NVIDIA GeForce RTX 4090

The AMD Ryzen 5 5600GT paired with the NVIDIA GeForce RTX 4090 produces a benchmark profile that is dominated by the GPU in almost every measurable way, yet the CPU still imposes a visible ceiling at lower resolutions. At 4K Ultra, the combo delivers 93.6 FPS, while at 1080p Low it reaches 354 FPS; the gap between these extremes reveals how workload shifts from the graphics card to the processor as pixel count drops. This pairing ranks 68th out of 1681 tested combos in Doom, placing it in the top 4% of all configurations, which is notable given that the CPU itself sits at the 78th percentile among all processors.

CPU Role

The AMD Ryzen 5 5600GT is a 6-core, 12-thread processor based on the Zen 3 architecture, manufactured on TSMC's 7 nm process. It operates with a base clock of 3.60 GHz and a boost clock of 4.60 GHz, with a 65 W TDP and 16 MB of L3 cache. In synthetic benchmarks, the chip scores 17,272 in Cinebench R23 multi-core and 2,438 in single-core; its PassMark multi-thread score is 20,325, and its 3DMark max-threads score is 5,554. The processor's average benchmark score is 20,740, which places it within 0.3% of the AMD Ryzen 5 5600X (20,680) and effectively tied with the Intel Core i7-10700 (20,746), while trailing the Intel Core i5-12490F by 0.3% (20,794).

In Doom, the CPU's role becomes most apparent at 1080p, where frame rates are highest and the processor must keep up with the GPU's output. At 1080p Low, the combo hits 354 FPS; at 1080p High, it drops to 316.1 FPS, and at 1080p Ultra, it falls to 268.5 FPS. The spread between Low and Ultra at 1080p is roughly 85 FPS, indicating that while the GPU is still doing most of the work, the CPU's 6-core/12-thread configuration is sufficient to drive very high frame rates without becoming a hard bottleneck. The single-thread score of 913 in 3DMark and 2,438 in Cinebench R23 suggests that per-core performance is adequate for Doom's engine, which benefits from strong single-threaded IPC.

Compared to its nearest rivals, the 5600GT's multi-threaded performance is essentially indistinguishable from the Core i7-10700 and Ryzen 5 5600X, with deltas of 0% and 0.3% respectively. This means that in CPU-bound scenarios, the 5600GT should behave nearly identically to those chips. However, the 5600GT's 65 W TDP and integrated Radeon Vega 7 graphics are not relevant to gaming performance here, as the discrete RTX 4090 handles all rendering; the CPU's cache hierarchy, with 512 KB L2 per core and 16 MB L3, provides adequate data locality for a fast-paced FPS like Doom.

GPU Role

The NVIDIA GeForce RTX 4090 is the dominant component in this pairing, built on the AD102 chip with Ada Lovelace architecture and a 5 nm process. It features 16,384 shading units, 512 texture mapping units, and 176 raster output units, with 128 ray tracing cores and 512 tensor cores. The GPU operates at a base clock of 2235 MHz and a boost clock of 2520 MHz, with 24 GB of GDDR6X memory on a 384-bit bus delivering 1.01 TB/s of bandwidth. Its FP32 performance is 82.58 TFLOPS, and it scores 38,194 in PassMark G3D, ranking at the 91st percentile among all GPUs.

In Doom, the RTX 4090's raw power is evident across all resolutions. At 4K Ultra, the combo produces 93.6 FPS, while 4K High reaches 116 FPS and 4K Low hits 159.1 FPS. The GPU's memory bandwidth of 1.01 TB/s ensures that texture streaming at high resolutions is not a limiting factor, and the 24 GB VRAM capacity is far beyond what Doom requires, even at 4K with Ultra settings. The GPU's nearest rivals in synthetic benchmarks include the NVIDIA Tesla T4 (66,733 average score, -0.4% delta) and AMD Radeon Pro Vega 56 (67,097, -0.9% delta), but these are data-center and workstation cards, not gaming GPUs, so the RTX 4090's gaming performance is effectively unrivaled in this context.

The GPU's clock behavior is also relevant: the boost clock of 2520 MHz is sustained under load, and the pixel rate of 443.5 GPixel/s combined with a texture rate of 1,290.2 GTexel/s means that fill-rate-limited scenes at 4K are handled with ease. The RTX 4090's 450 W TDP and triple-slot cooler are not performance metrics, but they reflect the thermal headroom that allows consistent frame delivery; the data shows no min-FPS values, but the average FPS figures across all settings and resolutions remain well above 90 FPS, indicating that the GPU never becomes a weak link.

Resolution Scaling

The measured FPS data reveals a clear scaling pattern from 1080p to 4K, with the GPU becoming more dominant as resolution increases. At 1080p Low, the combo achieves 354 FPS; at 1440p Low, it drops to 286.2 FPS; and at 4K Low, it falls to 159.1 FPS. This represents a 55% reduction in frame rate from 1080p to 4K at Low settings, which is consistent with the GPU being the primary limiter, as the pixel count increases by a factor of four while FPS drops by roughly half.

For High settings, the progression is 316.1 FPS at 1080p, 212.3 FPS at 1440p, and 116 FPS at 4K, a 63% drop from 1080p to 4K. At Ultra settings, the numbers are 268.5 FPS, 170.5 FPS, and 93.6 FPS, respectively, showing a 65% reduction. The slightly larger percentage drops at higher settings indicate that the GPU's workload scales more steeply with both resolution and quality, which is expected given the RTX 4090's architecture.

The data also shows that the limiting component shifts between resolutions. At 1080p, the CPU's role becomes more prominent because frame rates exceed 300 FPS, and the 5600GT's 6-core/12-thread configuration must process draw calls and game logic at a very high rate. The fact that 1080p Low (354 FPS) is only about 10% faster than 1080p High (316.1 FPS) suggests that at 1080p Low, the CPU is approaching its throughput ceiling, as the GPU could likely render even faster if the CPU could feed it. At 4K, the GPU is clearly the bottleneck, as the FPS drops are proportional to the pixel-count increase, and the CPU has ample headroom at 93.6-159.1 FPS.

How This Combo Ranks

The combo of AMD Ryzen 5 5600GT and NVIDIA GeForce RTX 4090 ranks 68th out of 1681 tested combinations in Doom, which places it in the top 4% of all configurations. This is a strong result, but it is not the top ranking, and the gap between this combo and the absolute best is largely attributable to the CPU. The RTX 4090 is one of the fastest GPUs available, and the data shows that at 4K Ultra, the combo delivers 93.6 FPS, which is playable but not exceptional for a card of this caliber.

The rank of 68 means that there are 67 other combos that achieve higher average FPS in Doom, and those are almost certainly paired with faster CPUs. The 5600GT's percentile of 78 among all CPUs is decent, but it is not in the top tier; its nearest rival, the Ryzen 5 5600X, scores nearly identically (20,680 vs. 20,740, a 0.3% delta), so the 5600GT is not holding back the RTX 4090 in a meaningful way at 4K. However, at 1080p, the CPU's limitations are more visible, as the combo's 354 FPS at Low is likely lower than what a higher-end CPU like a Ryzen 7 or Core i7 could achieve with the same GPU.

The data suggests that this combo is well-balanced for 4K gaming, where the GPU does the heavy lifting, but it is less ideal for competitive 1080p play where frame rates above 350 FPS may be CPU-limited. The combo's rank of 68 out of 1681 is a function of the GPU's dominance; without the RTX 4090, the 5600GT alone would likely rank much lower, as its synthetic scores are only in the 78th percentile. The pairing works because Doom is a well-optimized FPS that scales across hardware, but the CPU is the weaker link in this duo.

FAQ

Q: Does the AMD Ryzen 5 5600GT bottleneck the RTX 4090 in Doom?

A: At 4K, no, the GPU is the limiting factor, as FPS scales with resolution and settings (93.6 FPS at 4K Ultra vs. 159.1 FPS at 4K Low). At 1080p, the CPU becomes more relevant, with 354 FPS at Low settings, but the 5600GT's 6-core/12-thread configuration still delivers very high frame rates.

Q: What is the best resolution for this combo in Doom?

A: 1440p High provides a strong balance, with 212.3 FPS, while 4K High offers 116 FPS and 4K Ultra drops to 93.6 FPS. For maximum smoothness, 1080p High at 316.1 FPS is the highest quality-to-speed ratio.

Q: How does the 5600GT compare to its closest CPU rivals?

A: The 5600GT scores 20,740 in average benchmarks, which is 0.3% ahead of the Ryzen 5 5600X (20,680) and 0% different from the Intel Core i7-10700 (20,746), but 0.3% behind the Intel Core i5-12490F (20,794).

Q: Is the RTX 4090's 24 GB VRAM necessary for Doom?

A: No, Doom is a 2016 title, and the 24 GB GDDR6X memory with 1.01 TB/s bandwidth far exceeds the game's requirements. The extra VRAM is not a limiting factor at any resolution or setting in this benchmark.

Q: Why does the combo rank 68th out of 1681 combos?

A: The rank reflects the GPU's dominance; the RTX 4090 is at the 91st percentile among GPUs, but the 5600GT is at the 78th percentile among CPUs. At 4K, the GPU drives the score, but at 1080p, the CPU holds back the combo from reaching the top rankings.

Q: What FPS can I expect at 1080p Ultra settings?

A: The measured average FPS at 1080p Ultra is 268.5 FPS, which is well above the refresh rate of most monitors and indicates that the combo is GPU-bound even at high quality settings.