Rust

FAQ

Q: What is the launch MSRP of the AMD Ryzen 5 8400F and the AMD Radeon RX 7900 XT?

A: The CPU has a launch MSRP of $170, while the GPU has a launch MSRP of 899 USD.

Q: How does the Ryzen 5 8400F compare to its closest rivals in average benchmark score?

A: The CPU scores 25,064 on average. This is effectively tied with the AMD Ryzen 7 2700X (25,057, 0% delta) and the AMD Ryzen AI 5 PRO 340 (25,099, -0.1% delta). It is 0.3% ahead of the AMD Ryzen 5 7500F (24,993).

Q: What is the GPU's position relative to its nearest competitors?

A: The RX 7900 XT averages 38,358 in benchmarks. It is exactly level with the NVIDIA GeForce RTX 5080 Mobile (38,349, 0% delta), 0.3% ahead of the NVIDIA CMP 70HX (38,225), and 0.6% ahead of the NVIDIA GeForce RTX 4080 Mobile (38,135). It trails the NVIDIA GeForce MX570 by 0.4% (38,494).

Q: What is the best 1080p result recorded for this combo in Rust?

A: The highest average FPS at 1920x1080 is 213.8, achieved at Low settings. At Ultra settings, the average drops to 104.8 FPS.

Q: How much VRAM does the RX 7900 XT have, and what is its memory bandwidth?

A: The GPU is equipped with 20 GB of GDDR6 memory on a 320-bit bus, providing 800.0 GB/s of bandwidth. Memory clocks are 2500 MHz with 20 Gbps effective speed.

Q: What is the combo's overall ranking in Rust among tested configurations?

A: This pairing of AMD Ryzen 5 8400F and AMD Radeon RX 7900 XT ranks 310th out of 1,717 tested combos in Rust.

GPU Role

The AMD Radeon RX 7900 XT is the dominant component in this pairing for Rust. Its RDNA 3.0 architecture, built on TSMC's 5 nm process, packs 57,700 million transistors across a 529 mm² die. The GPU runs at a base clock of 1387 MHz and boosts to 2394 MHz, with a game clock rated at 2025 MHz. The 20 GB frame buffer is substantial for a survival title that can become asset-heavy; at 4K with High settings, the data shows an average of 56.2 FPS, indicating the GPU has enough memory bandwidth (800.0 GB/s) to feed the rendering pipeline without stuttering from capacity limits.

The GPU's compute resources are extensive: 5,376 shading units, 336 texture mapping units, and 192 ROPs. Pixel rate reaches 459.6 GPixel/s, while texture rate hits 804.4 GTexel/s. These figures translate directly into Rust's rendering workload, which involves large open-world environments with many dynamic objects. FP32 throughput of 51.48 TFLOPS gives the card headroom for the game's physics and draw calls. The GPU's benchmark percentile stands at 82nd among all GPUs, with an average score of 38,358 — placing it in the upper tier of tested hardware.

The 300 W TDP and dual-slot cooler with 2x 8-pin power connectors are relevant for system planning, but the performance data speaks clearly: this GPU is the primary driver of frame rates in Rust. At 1080p Low, the combo reaches 213.8 FPS average, a figure that no CPU alone could achieve in this title. The gap between settings at any given resolution shows the GPU's headroom; for instance, at 1440p, moving from Low (170 FPS) to Ultra (74.1 FPS) demonstrates a 95.9 FPS swing, all attributable to GPU workload scaling.

CPU Role

The AMD Ryzen 5 8400F provides the processing foundation for this combo. It is a 6-core, 12-thread Zen 4 part from the 8000 series, codenamed Phoenix, built on a 4 nm TSMC process. Base clock is 4.20 GHz with a boost of 4.70 GHz. The 16 MB shared L3 cache and 1 MB L2 per core are modest by modern standards, but Rust's single-threaded server and simulation logic often benefits from higher clocks per core rather than raw core counts.

Benchmark data shows the CPU's single-thread performance is respectable: a 3DMark single-thread score of 951 and Cinebench R23 single-core of 2,943. Multi-threaded results are stronger proportionally: Cinebench R23 multi-core reaches 20,851, while 3DMark max-threads hits 6,165. The CPU's average benchmark score of 25,064 places it at the 82nd percentile among all CPUs, which is high but not elite. Its nearest rival, the AMD Ryzen 7 2700X, matches it exactly at 25,057, showing that the 8400F's efficiency (65 W TDP) does not sacrifice throughput relative to older, higher-power parts.

In Rust, the CPU's role becomes more apparent at lower resolutions and settings where the GPU is less stressed. At 1080p Low, the combo hits 213.8 FPS average; at 1080p Ultra, it drops to 104.8 FPS. The delta between these settings (109 FPS) is larger than the delta between 1080p Low and 1440p Low (43.8 FPS), suggesting that at the lowest settings, the CPU is more likely to be a limiting factor. The 8400F's 12 threads handle Rust's background simulation and entity updates, but the data does not show it bottlenecking the RX 7900 XT severely, given that frame rates remain high across all resolution/settings combinations.

How This Combo Ranks

The combination of AMD Ryzen 5 8400F and AMD Radeon RX 7900 XT achieves a rank of 310 out of 1,717 tested combos in Rust. This places it in the top 18% of all configurations in the database. The ranking reflects the balance between a solid mid-range CPU (82nd percentile) and a high-end GPU (also 82nd percentile). The data shows that in Rust specifically, this pairing outperforms many combos with more powerful CPUs but weaker GPUs, confirming that the RX 7900 XT is the primary contributor to the game's frame rates.

The rank of 310 suggests there are 309 combos that produce higher average FPS in Rust, likely featuring top-tier CPU/GPU pairings. However, given that this combo's GPU rivals include mobile parts like the RTX 5080 Mobile and RTX 4080 Mobile, the desktop RX 7900 XT is well-positioned. The CPU's rivals — including the Ryzen 7 2700X and Ryzen 5 7500F — are all within 0.3% of its average score, meaning any of these CPUs would likely produce similar results when paired with the same GPU in Rust. The rank is a holistic measure: it accounts for the entire system's ability to sustain frame rates, and the data indicates this system is firmly above average without being flagship-tier.

Resolution Scaling

The measured FPS data reveals how this combo scales across resolutions. At 1080p, the averages range from 104.8 (Ultra) to 213.8 (Low). Moving to 1440p, those figures drop to 74.1 (Ultra) and 170 (Low). At 4K (3840x2160), the range tightens significantly: 42.2 (Ultra) to 97.5 (Low). The percentage drops from 1080p to 4K are telling. For Low settings, the drop is from 213.8 to 97.5 FPS, a reduction of 54.4%. For High settings, the drop is from 135.4 to 56.2 FPS, a 58.5% reduction. For Ultra settings, the drop is from 104.8 to 42.2 FPS, a 59.7% reduction.

This pattern indicates that the GPU is the scaling bottleneck as resolution increases. The proportional drop is consistent across settings (roughly 54-60%), which suggests the CPU is not introducing a variable bottleneck at higher resolutions. If the CPU were limiting at 1080p, we would expect the percentage drop to be smaller at higher resolutions (since the GPU becomes more stressed and the CPU has more headroom). Instead, the consistent drop points to GPU-bound scaling. The 4K Ultra result of 42.2 FPS is the only sub-60 FPS average recorded, showing that this combo is borderline for 4K Ultra in Rust. At 4K High (56.2 FPS), it is just below the 60 FPS threshold, while 4K Medium (67.7 FPS) and 4K Low (97.5 FPS) are playable.

Measured FPS Breakdown

The complete measured FPS dataset for Rust with this combo is as follows:

1920x1080:

• Low: 213.8 FPS average
• Medium: 161 FPS average
• High: 135.4 FPS average
• Ultra: 104.8 FPS average

2560x1440:

• Low: 170 FPS average
• Medium: 109.4 FPS average
• High: 93.5 FPS average
• Ultra: 74.1 FPS average

3840x2160:

• Low: 97.5 FPS average
• Medium: 67.7 FPS average
• High: 56.2 FPS average
• Ultra: 42.2 FPS average

At 1080p, the combo delivers over 100 FPS at every setting, with Low nearing 214 FPS. This makes the system highly capable for high-refresh-rate 1080p monitors. At 1440p, all settings remain above 74 FPS, with Low and Medium exceeding 100 FPS. This is the sweet spot for this combo: 1440p High (93.5 FPS) and Ultra (74.1 FPS) are both smooth for competitive play. At 4K, the picture changes. Low settings produce 97.5 FPS, which is playable, but Medium drops to 67.7 FPS. High (56.2 FPS) and Ultra (42.2 FPS) fall below the 60 FPS mark, indicating that 4K gaming requires settings reductions for a consistent frame rate. The data shows a clear diminishing return: each step up in resolution costs roughly 20-30% of the frame rate, and the gap between Low and Ultra widens at higher resolutions (109 FPS at 1080p, 55.3 FPS at 4K), confirming that the GPU's raw power is best utilized at 1440p and below for this title.