Roblox

How This Combo Ranks

The Intel Core i5-12400 and AMD Radeon RX 6800 XT combination ranks 1165th out of 3711 tested combos in Roblox. This places the pairing in the 69th percentile of all recorded configurations, a solidly above-average result for a game that is typically more dependent on single-thread CPU performance than on raw GPU throughput. The rank reflects the balance between a mid-range 12th Gen processor and a high-end RDNA 2 graphics card, where the GPU does most of the heavy lifting at higher resolutions while the CPU sets the ceiling at lower settings.

The CPU itself sits at the 72nd percentile among all processors in the database, with an average benchmark score of 18683. Its nearest rivals in synthetic workloads include the AMD EPYC 7643 at 18697 (0.1% ahead), the Intel Core i7-1355U at 18730 (0.3% ahead), and the AMD Ryzen AI 5 330 at 18811 (0.7% ahead). The Intel Core i3-14100F trails by 0.9% with a score of 18519. These margins are narrow, indicating that the i5-12400 delivers performance squarely in the mainstream desktop tier, neither a standout nor a laggard among its immediate peers.

The GPU ranks at the 85th percentile among all graphics cards, with an average benchmark score of 48477. Its closest competitors in the database are the NVIDIA RTX A1000 Mobile at 47743 (1.5% behind), the Intel Arc A550M at 49737 (2.5% ahead), the NVIDIA GeForce RTX 5070 Ti at 49957 (3% ahead), and the AMD Radeon RX Vega 64 at 50001 (3% ahead). The RX 6800 XT sits just below these faster cards, but in Roblox the measured frame rates suggest that the GPU is rarely the bottleneck until 4K Ultra settings are applied.

GPU Role

The AMD Radeon RX 6800 XT uses the Navi 21 chip on a 7 nm process from TSMC, with 26,800 million transistors on a 520 mm² die. It carries 16 GB of GDDR6 memory on a 256-bit bus, yielding 512.0 GB/s of bandwidth. The memory clock is listed at 2000 MHz with 16 Gbps effective transfer. The GPU has 4608 shading units, 288 texture mapping units, and 128 raster operation pipelines, along with 72 ray tracing cores. Its pixel rate is 288.0 GPixel/s, texture rate is 648.0 GTexel/s, and FP32 compute reaches 20.74 TFLOPS. The base clock is 1825 MHz, the boost clock is 2250 MHz, and the game clock is 2015 MHz.

In Roblox, the GPU's role changes dramatically with resolution. At 1080p Low, the measured average FPS is 468, which is far beyond what most displays can show. The 16 GB VRAM is never stressed by this game, and the memory bandwidth is more than sufficient for the blocky geometry and simple textures typical of Roblox experiences. The RX 6800 XT delivers such high frame rates that the CPU becomes the limiting factor at lower resolutions, a pattern visible in the FPS scaling from Low to Ultra settings.

At 4K Ultra, the average FPS drops to 115. This is still playable, but it represents a 75% reduction from the 1080p Low result. The GPU is clearly engaged at this resolution and settings combination, as the rendering workload increases enough to bring the frame rate down to a range where the graphics card's compute and memory throughput matter more. The 128 ROPs and 288 TMUs handle the pixel and texture work efficiently, but the gap between 4K High (142 FPS) and 4K Ultra (115 FPS) shows that the Ultra preset adds enough shading load to cost 27 FPS, or roughly 19% of the High preset's performance.

Resolution Scaling

The measured data shows a clear pattern of diminishing returns as resolution increases. At 1080p Low, the combo produces 468 FPS. Moving to 1440p Low drops that to 312 FPS, a 33% reduction. At 4K Low, the average is 176 FPS, which is 62% below the 1080p Low figure. The same trend appears across all settings presets, but the percentage drops are not uniform.

For High settings, the progression goes from 376 FPS at 1080p to 251 FPS at 1440p (33% drop), then to 142 FPS at 4K (62% drop from 1080p). Medium settings show 425 FPS at 1080p, 284 FPS at 1440p (33% drop), and 161 FPS at 4K (62% drop). Ultra settings start at 305 FPS at 1080p, fall to 204 FPS at 1440p (33% drop), and reach 115 FPS at 4K (62% drop from 1080p). The consistency of these percentages across presets indicates that resolution scaling is independent of the graphics quality level, a sign that the rendering pipeline in Roblox scales linearly with pixel count.

The 33% drop from 1080p to 1440p corresponds to the 1.78x increase in pixel count (from 2.07 million to 3.69 million). The 62% drop from 1080p to 4K matches the 4x pixel count increase (from 2.07 million to 8.29 million). This near-linear scaling suggests that neither the CPU nor the GPU is hitting a hard architectural limit; instead, the workload grows proportionally with the number of pixels. At 1080p, the frame rates are so high that the CPU's single-thread performance becomes the primary constraint. At 4K, the GPU's fill rate and shading throughput take over as the limiting factors.

Settings Recommendations

The measured FPS rows provide four presets at each resolution: Low, Medium, High, and Ultra. The Medium preset consistently offers the best balance between visual quality and performance. At 1080p Medium, the average FPS is 425, with a minimum of 362 and a maximum of 489. This is only 9% slower than Low (468 FPS) but delivers noticeably better visuals. At 1440p Medium, the average is 284 FPS, with a minimum of 241 and a maximum of 327, which is 9% slower than Low (312 FPS) but still far above any display refresh rate commonly in use.

At 4K Medium, the average is 161 FPS, with a minimum of 136 and a maximum of 185. This is 9% slower than Low (176 FPS) and 29% faster than Ultra (115 FPS). The minimum of 136 FPS ensures that even the most demanding scenes stay above typical 120 Hz monitor refresh rates. The High preset at 4K delivers 142 FPS, which is 12% below Medium, while Ultra drops to 115 FPS, a 29% reduction from Medium. For users with high refresh rate displays, Medium provides the headroom needed to maintain smooth frame pacing during complex scenes.

The Ultra preset is the only configuration where the average FPS falls below 120 at 4K. At 1080p and 1440p, Ultra still delivers 305 FPS and 204 FPS respectively, so it remains viable at those resolutions. However, the 27 FPS difference between High and Ultra at 4K (142 vs 115) suggests diminishing returns from the additional shading and post-processing effects. The database shows that Medium is the sweet spot across all three resolutions, offering the highest minimum FPS values relative to the visual upgrade over Low.

Measured FPS Breakdown

At 1920x1080, the Low preset produces an average of 468 FPS. Medium raises the average to 425 FPS, with a minimum of 362 and a maximum of 489. High delivers 376 FPS, and Ultra drops to 305 FPS. The spread from Low to Ultra is 163 FPS, or 35% of the Low result. The medium preset's minimum of 362 FPS is higher than the Ultra preset's average of 305 FPS, which indicates that the Ultra settings add enough workload to reduce the floor by over 57 FPS compared to Medium's minimum.

At 2560x1440, Low produces 312 FPS. Medium averages 284 FPS, with a minimum of 241 and a maximum of 327. High delivers 251 FPS, and Ultra drops to 204 FPS. The spread from Low to Ultra is 108 FPS, or 35% of the Low result. The Medium minimum of 241 FPS is 37 FPS higher than the Ultra average of 204 FPS, preserving the same relative gap seen at 1080p. This consistency suggests that the Ultra preset imposes a fixed percentage overhead regardless of resolution.

At 3840x2160, Low produces 176 FPS. Medium averages 161 FPS, with a minimum of 136 and a maximum of 185. High delivers 142 FPS, and Ultra drops to 115 FPS. The spread from Low to Ultra is 61 FPS, or 35% of the Low result. The Medium minimum of 136 FPS is 21 FPS higher than the Ultra average of 115 FPS. Across all resolutions, the Medium preset's minimum FPS never falls below 136, which makes it the most reliable choice for maintaining high refresh rates.

The data shows that the FPS drop between Low and Medium is consistently 9% at every resolution: 468 to 425 at 1080p, 312 to 284 at 1440p, and 176 to 161 at 4K. The drop between Medium and High is also consistent: 425 to 376 (12% reduction) at 1080p, 284 to 251 (12% reduction) at 1440p, and 161 to 142 (12% reduction) at 4K. The drop between High and Ultra is 19% at every resolution: 376 to 305 at 1080p, 251 to 204 at 1440p, and 142 to 115 at 4K. These uniform percentage drops indicate that each preset tier adds a fixed computational burden relative to the previous tier.

CPU Role

The Intel Core i5-12400 is a 6-core, 12-thread processor based on the Alder Lake architecture, built on Intel's 10 nm process. It has a base clock of 2.50 GHz and a boost clock of 4.40 GHz, with a 65 W TDP. The cache hierarchy includes 80 KB of L1 per core, 1.25 MB of L2 per core, and 18 MB of shared L3 cache. The CPU supports DDR4 and DDR5 memory in dual-channel configuration, and it uses PCIe Gen 5 with 16 lanes from the CPU. The integrated UHD Graphics 730 is present but irrelevant for gaming when the RX 6800 XT is installed.

Synthetic benchmarks show the i5-12400's single-thread strength. In 3DMark, the single-thread score is 910, while the 2-thread score is 1692, the 4-thread score is 3012, the 8-thread score is 4745, and the 16-thread score is 5873. The max-thread score is 5890. Cinebench R23 results show 2257 for single-core and 15989 for multi-core. Geekbench reports 1848 for single-core and 8564 for multi-core. These numbers place the CPU in the upper mainstream tier for single-thread work, which is critical for Roblox.

Roblox is a game that relies heavily on single-thread CPU performance for its simulation and scripting logic. The measured FPS at 1080p Low reaches 468, which is far beyond the GPU's capability to render at that resolution. This indicates that the CPU is the limiting factor at lower resolutions and settings. The i5-12400's boost clock of 4.40 GHz and strong single-thread performance in Cinebench R23 (2257) and 3DMark (910) allow it to push Roblox to very high frame rates.

At 4K Ultra, the average FPS drops to 115, and the CPU's role diminishes as the GPU becomes the bottleneck. The 6 cores and 12 threads are more than sufficient for Roblox's workloads; the game rarely uses more than a few threads. The L3 cache of 18 MB helps with the game's asset streaming, while the 2.50 GHz base clock ensures consistent performance under load. The data suggests that upgrading the CPU would yield diminishing returns at higher resolutions, while upgrading the GPU would only help at 4K Ultra. The i5-12400 provides enough headroom to keep the RX 6800 XT well-fed at 1080p and 1440p, where the measured frame rates remain comfortably above 200 FPS even at Ultra settings.