Rust

The Intel Core i5-10400F paired with the AMD Radeon RX 6650 XT delivers a highly playable Rust experience at 1080p, but the data reveals a steep performance cliff as resolution increases. At 1920x1080 with Low settings, the combo produces 142.9 FPS average, which drops to 97.1 FPS at Medium, 79.0 FPS at High, and 60.7 FPS at Ultra. Moving to 2560x1440, the averages fall to 101.6 FPS (Low), 69.0 FPS (Medium), 54.7 FPS (High), and 45.6 FPS (Ultra). At 3840x2160, the picture changes dramatically: Low settings yield 60.5 FPS, Medium drops to 40.4 FPS, High falls to 31.6 FPS, and Ultra bottoms out at 24.9 FPS.

The scaling pattern from 1080p to 4K is telling. At 1080p Low, the system delivers 142.9 FPS, but at 4K Low it manages only 60.5 FPS — a reduction of 57.7%. The gap widens at higher settings: 1080p Ultra runs at 60.7 FPS while 4K Ultra achieves just 24.9 FPS, a 59.0% drop. This steep decline indicates that the GPU becomes the dominant bottleneck as resolution climbs. The RX 6650 XT’s 8 GB of GDDR6 memory on a 128-bit bus with 280.3 GB/s bandwidth is sufficient for 1080p and 1440p, but at 4K the memory subsystem and the 10.79 TFLOPS of FP32 compute are pushed to their limits. The 24.9 FPS result at 4K Ultra is below playable thresholds, while 4K Low at 60.5 FPS is borderline.

How This Combo Ranks

In the database of tested combinations, this specific pairing holds the rank of 1073 out of 1717 combos in Rust, placing it in the 37.5th percentile of all tested systems. This mid-tier ranking reflects a balanced but not exceptional configuration. The CPU’s average benchmark score of 14168 puts it in the 73rd percentile among all CPUs, while the GPU’s average score of 29024 lands in the 72nd percentile among all GPUs. The combo rank being lower than either individual component percentile suggests that Rust’s specific demands — likely a mix of CPU-bound simulation and GPU-bound rendering — do not allow this pairing to punch above its weight.

The CPU’s nearest rivals in synthetic benchmarks include the AMD EPYC 7552 (deltaPct 0.4%), the AMD Ryzen 3 7320C (deltaPct -0.8%), the Intel Core i5-8500 (deltaPct -1.1%), and the AMD Ryzen Embedded V2546 (deltaPct -1.2%). These margins are tight, meaning the i5-10400F sits in a crowded performance band. The GPU’s nearest rivals are the AMD Radeon RX 6800M (deltaPct 0%), the AMD Radeon RX 470 (deltaPct 0.1%), the Intel Arc A370M (deltaPct -0.5%), and the AMD Radeon RX Vega M GH (deltaPct -0.6%). The RX 6650 XT is effectively tied with the RX 6800M in aggregate score, which is notable given the latter is a mobile part. Within Rust, the measured FPS at 1080p Medium (97.1) and 1440p Medium (69.0) suggest the combo behaves as expected for its ranking, neither overperforming nor underperforming relative to other 1700+ combinations.

GPU Role

The AMD Radeon RX 6650 XT is built on the RDNA 2.0 architecture using a 7 nm process at TSMC, with a die size of 237 mm² containing 11,060 million transistors. The GPU operates with a base clock of 2055 MHz, a game clock of 2410 MHz, and a boost clock of 2635 MHz. It features 2048 shading units, 128 texture mapping units, and 64 render output units, along with 32 ray accelerators. The memory configuration is 8 GB of GDDR6 on a 128-bit bus, running at 2190 MHz (17.5 Gbps effective), yielding a bandwidth of 280.3 GB/s. These specifications produce a pixel rate of 168.6 GPixel/s and a texture rate of 337.3 GTexel/s.

In Rust, the GPU’s role becomes clear when examining the FPS deltas between settings at the same resolution. At 1080p, moving from Low to Medium costs 45.8 FPS (from 142.9 to 97.1), from Medium to High costs 18.1 FPS (to 79.0), and from High to Ultra costs 18.3 FPS (to 60.7). The largest single drop occurs when enabling Medium settings, indicating that Rust’s medium preset introduces significant shading and texture loads that the GPU’s 8 GB frame buffer absorbs. At 4K, the same transitions show smaller absolute drops: Low to Medium costs 20.1 FPS, Medium to High costs 8.8 FPS, and High to Ultra costs 6.7 FPS. This compression of FPS differences at higher resolutions suggests the GPU is already saturated and cannot leverage additional settings headroom. The 64 ROPs and 128 TMUs are adequate for 1080p rasterization but become limiting factors at 4K, where fill-rate demands outpace the GPU’s capabilities.

Measured FPS Breakdown

At 1920x1080, the combo delivers strong results across all presets. Low settings produce 142.9 FPS average, which is smooth for competitive play. Medium drops to 97.1 FPS, still above 60 FPS for high-refresh monitors. High runs at 79.0 FPS, and Ultra manages 60.7 FPS — exactly at the 60 FPS threshold but not above it. None of these 1080p results dip below playable levels, though Ultra is borderline for 144 Hz displays.

At 2560x1440, the performance profile shifts. Low settings yield 101.6 FPS, which remains excellent. Medium provides 69.0 FPS, slightly above the 60 FPS comfort zone. High falls to 54.7 FPS, which may cause noticeable stutter in fast-paced combat. Ultra drops to 45.6 FPS, below the 60 FPS target and approaching the 30 FPS floor for cinematic but not competitive play. The 1440p data shows a clear trade-off: users must choose between visual fidelity and frame rate, with Medium being the highest preset that maintains 60+ FPS.

At 3840x2160, the results are marginal. Low settings achieve 60.5 FPS, barely crossing the 60 FPS mark. Medium drops to 40.4 FPS, which is playable but not smooth. High falls to 31.6 FPS, and Ultra plummets to 24.9 FPS, which is below the 30 FPS threshold for acceptable motion. The 4K data indicates that this combo is not suitable for 4K gaming in Rust unless the user is willing to accept Low settings and even then the 60.5 FPS average leaves no headroom for dips. The scaling from 1080p to 4K at Low settings (142.9 to 60.5 FPS) represents a 57.7% reduction, while at Ultra the reduction is 59.0% (60.7 to 24.9 FPS), showing that the relative penalty is consistent regardless of preset.

CPU Role

The Intel Core i5-10400F is a 6-core, 12-thread processor based on the Comet Lake architecture, manufactured on Intel’s 14 nm process. It runs at a base clock of 2.90 GHz and boosts up to 4.30 GHz, with a 65 W TDP. The cache hierarchy includes 64 KB L1 per core, 256 KB L2 per core, and 12 MB of shared L3. Memory support is DDR4 with dual-channel configuration, providing 42.7 GB/s of bandwidth. The processor connects via PCIe Gen 3 with 16 lanes.

In Rust, the CPU’s role is evident at lower resolutions where the GPU is not the primary bottleneck. At 1080p Low, the combo hits 142.9 FPS, which is likely close to the CPU’s limit for this game’s simulation thread. The single-thread performance, measured at 688 in 3DMark single-thread and 1453 in Cinebench R23 single-core, is adequate but not exceptional. The multi-thread scores — 4748 in 3DMark 16-thread, 10297 in Cinebench R23 multi-core, and 12115 in PassMark multithread — show that the 6-core/12-thread configuration provides solid parallel throughput. Rust’s server-side simulation and entity updates can utilize multiple cores, but the game’s main thread likely benefits most from the 4.30 GHz boost clock.

Comparing to the CPU’s nearest rivals, the i5-10400F’s average score of 14168 is within 1.2% of the Intel Core i5-8500 (14332) and the AMD Ryzen Embedded V2546 (14336). This means that in Rust, swapping to any of these CPUs would produce negligible FPS differences at the same GPU. The 73rd percentile ranking among all CPUs indicates that the i5-10400F is a mid-to-upper tier processor, but not a high-end one. The 12 MB L3 cache is shared across all cores, which helps in games that need fast access to shared data structures. The 42.7 GB/s memory bandwidth is sufficient for Rust’s needs, though faster DDR4 would not be supported beyond the dual-channel limit.

The data shows that the CPU is not the limiting factor at 4K, where the GPU’s 24.9-60.5 FPS range is clearly below the CPU’s capability. At 1080p Low, the 142.9 FPS result may be CPU-bound, as the GPU could likely render more frames if the CPU allowed. The fact that 1080p Low (142.9) is only 1.4x faster than 1440p Low (101.6) while 1080p Ultra (60.7) is 1.3x faster than 1440p Ultra (45.6) suggests the CPU maintains a consistent ceiling across resolutions. This indicates that for 1080p gaming, the i5-10400F is adequate to keep the RX 6650 XT fed, but for 1440p and 4K, the GPU becomes the definitive bottleneck.

FAQ

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

A: The data shows 1920x1080 is the sweet spot. At Low settings, the combo achieves 142.9 FPS, and even at Ultra it maintains 60.7 FPS. At 2560x1440, only Low (101.6 FPS) and Medium (69.0 FPS) exceed 60 FPS, while at 3840x2160, only Low (60.5 FPS) barely crosses that threshold.

Q: How does the RX 6650 XT compare to its nearest rival in aggregate benchmarks?

A: The RX 6650 XT has an average benchmark score of 29024, which is statistically tied with the AMD Radeon RX 6800M (29011, deltaPct 0%). It also edges out the AMD Radeon RX 470 (28996, deltaPct 0.1%) but trails the Intel Arc A370M (29175, deltaPct -0.5%) and the AMD Radeon RX Vega M GH (29197, deltaPct -0.6%) by less than 1%.

Q: What is the FPS difference between Low and Ultra settings at 1080p?

A: At 1920x1080, Low settings produce 142.9 FPS while Ultra produces 60.7 FPS, a difference of 82.2 FPS (57.5% reduction). The step from Low to Medium costs 45.8 FPS, which is the largest single-setting penalty, indicating that Medium introduces substantial rendering loads.

Q: Is the CPU or GPU the bottleneck at 4K?

A: The data indicates the GPU is the limiting component at 3840x2160. With 4K Ultra producing only 24.9 FPS and 4K Low at 60.5 FPS, the i5-10400F’s multi-thread capabilities (Cinebench R23 multi-core score of 10297) are far above what is needed to drive these frame rates. The GPU’s 8 GB memory and 280.3 GB/s bandwidth are insufficient for the higher resolution’s demands.

Q: How does the i5-10400F rank among all CPUs?

A: The i5-10400F has a percentile ranking of 73 among all CPUs, with an average benchmark score of 14168. Its nearest rival is the AMD EPYC 7552 with a score of 14115 (deltaPct 0.4%), while the Intel Core i5-8500 (14332, deltaPct -1.1%) is slightly faster in aggregate.

Q: What is the combo’s overall rank in Rust among tested systems?

A: The i5-10400F + RX 6650 XT combo ranks 1073 out of 1717 tested combinations in Rust, placing it in the 37.5th percentile. This is lower than the individual component percentiles (CPU 73rd, GPU 72nd), suggesting Rust’s workload does not favor this particular pairing.