Roblox

Roblox is a notoriously lightweight title, but the measured data for the Intel Core i5-12400 and AMD Radeon RX 9060 combination reveals a fascinating scaling curve that shifts the bottleneck between the CPU and GPU depending on the resolution. At 1080p, the frame rates are astronomical, reaching 338 FPS on Low settings, which clearly indicates the CPU is the primary limiter, as the GPU has ample headroom. Moving to 1440p drops the top-end Low setting result to 226 FPS, and at 4K, the same settings yield 128 FPS. This progression shows a classic transition where the GPU begins to take on more responsibility as pixel count increases, yet the i5-12400’s strong six-core architecture keeps the experience fluid even at the highest resolution.

The most telling metric for resolution scaling is the delta between the Low and Ultra presets. At 1080p, the gap between Low (338 FPS) and Ultra (221 FPS) is 117 FPS, a 34.6% reduction in performance. At 1440p, that spread narrows to 79 FPS (226 FPS Low vs. 147 FPS Ultra), a 35% drop. However, at 4K, the gap shrinks to just 45 FPS (128 FPS Low vs. 83 FPS Ultra), representing a 35.2% reduction. This consistency in percentage drop across resolutions is deceptive; while the relative penalty for Ultra settings remains steady, the absolute FPS loss becomes less severe as the resolution increases, because the GPU is already working harder. The data suggests that at 4K, the RX 9060 is the limiting factor, as the frame rate ceiling drops significantly regardless of settings, whereas at 1080p, the i5-12400’s single-thread performance caps the output.

Resolution Scaling

The jump from 1080p to 1440p on High settings shows a reduction from 272 FPS to 182 FPS, a 33.1% decrease. This is a substantial hit, but the resulting 182 FPS is still far beyond what any display can refresh. The more critical transition is from 1440p to 4K, where the High preset drops from 182 FPS to 103 FPS, a 43.4% decline. This steep fall indicates that the RX 9060, with its 8 GB of GDDR6 memory and 128-bit bus, is starting to hit its pixel throughput limits. The 4K results, with the Ultra preset dipping to 83 FPS, show that while playable, the experience is no longer unlimited by the CPU. The frame rate at 4K Ultra is still respectable, but the headroom for future updates or more demanding scenes is minimal.

Benchmark results indicate that the i5-12400 is a capable partner up to 1440p, where it can push frame rates into the 200+ FPS territory on lower settings. The data shows that at 4K, the GPU becomes the bottleneck, as evidenced by the fact that the frame rate delta between Low and Ultra settings at 4K (45 FPS) is proportionally similar to the delta at 1080p (117 FPS), but the absolute numbers are much lower. This means that the CPU is no longer the limiting factor at 4K; the RX 9060’s shading units and ROPs are the constraint. For gamers with high-refresh-rate 1080p or 1440p monitors, this combo is overkill, but for 4K gaming, it delivers a smooth 60+ FPS experience on most presets, with only the Ultra preset falling below the 100 FPS mark.

Settings Recommendations

For 1080p and 1440p, the Ultra preset is the recommended choice, as the measured frame rates of 221 FPS and 147 FPS, respectively, are both well above the 144 Hz threshold for most gaming monitors. The data shows that even at Ultra, the CPU is still delivering headroom, and the visual fidelity gains from higher settings are worth the FPS cost. At 1080p, dropping from Ultra to Low only increases performance by 117 FPS, but the visual downgrade is significant, making Ultra the clear winner for image quality without sacrificing smoothness. At 1440p, the Ultra preset’s 147 FPS is still excellent, and the 58 FPS difference to Low is not enough to justify the visual compromise.

At 4K, the recommendation shifts to High settings. The High preset yields 103 FPS, which is ideal for a 120 Hz display, while the Ultra preset drops to 83 FPS, which is still playable but leaves less margin for frame-time spikes in busy scenes. The Medium preset at 4K offers 116 FPS, which is a 12.6% improvement over High, but the visual difference between Medium and High is typically more noticeable than the difference between High and Ultra. The Low preset at 4K, with 128 FPS, is unnecessary unless the user prioritizes maximum frame rate over everything else. The sweet spot for 4K is High, as it balances the GPU load and CPU headroom to provide a consistently smooth experience without dipping below the 100 FPS mark.

CPU Role

The Intel Core i5-12400 is a six-core, twelve-thread processor based on the Alder Lake architecture, with a base clock of 2.50 GHz and a boost clock of 4.40 GHz. Its benchmark scores are impressive for a mainstream chip, with a Cinebench R23 multi-core score of 15,989 and a single-core score of 2,257. In Roblox, which is known for being heavily dependent on single-thread performance, the i5-12400’s 3DMark single-thread score of 910 and Passmark single-thread score of 3,456 are critical. The data shows that at 1080p Low, the frame rate reaches 338 FPS, which is a clear indicator that the CPU is the limiting factor, as the GPU is not being fully utilized.

The CPU’s role diminishes as resolution increases. At 4K, the frame rate on Low settings is 128 FPS, which is only 37.9% of the 1080p Low result. This suggests that the GPU’s workload is now the primary constraint, and the CPU has plenty of headroom to spare. The i5-12400’s 3DMark multi-thread score of 5,890 and Passmark multi-thread score of 18,747 show that it can handle the game’s physics and logic threads without breaking a sweat. The processor’s 18 MB of L3 cache and dual-channel memory support (DDR4 or DDR5) further contribute to its ability to feed the GPU data quickly, but the benchmark results indicate that Roblox does not require the full extent of the CPU’s capabilities, especially at higher resolutions where the GPU takes over as the bottleneck.

How This Combo Ranks

The combination of the Intel Core i5-12400 and AMD Radeon RX 9060 holds a rank of 1,729 out of 3,010 tested combos in Roblox, placing it in the 57.4th percentile. This is a mid-pack ranking, which is surprising given the high absolute frame rates. The explanation lies in the fact that Roblox is a game where even low-end hardware can achieve high FPS, so the ranking is relative to other combinations that may include more powerful CPUs or GPUs that can push even higher numbers. The CPU’s percentile rank against all processors is 72, meaning it performs better than 72% of CPUs, while the GPU’s percentile rank is 59, indicating it is better than 59% of GPUs.

The nearest rivals to the CPU are the AMD EPYC 7643 (-0.1% delta), Intel Core i7-1355U (-0.3% delta), and AMD Ryzen AI 5 330 (-0.7% delta), while the Intel Core i3-14100F is 0.9% faster. For the GPU, the NVIDIA GeForce RTX 3060 Ti is 0.7% faster, while the AMD Radeon R9 370X and RX 7700 are 1% and 1% slower, respectively. The combo’s mid-pack ranking is likely due to the fact that the RX 9060, while capable, is not a top-tier GPU, and the i5-12400, while strong, is not a flagship CPU. In a game like Roblox, where the engine is not particularly demanding, the difference between this combo and a higher-ranked one may only be 10-20 FPS, which is negligible in practical terms.

GPU Role

The AMD Radeon RX 9060 is built on the RDNA 4.0 architecture with the Navi 44 chip, manufactured on a 4 nm process at TSMC. It features 1,792 shading units, 112 TMUs, and 64 ROPs, with a boost clock of 2,990 MHz and a game clock of 2,400 MHz. The GPU has 8 GB of GDDR6 memory on a 128-bit bus, providing 288.0 GB/s of bandwidth. Its Passmark G3D score of 17,631 places it in the 59th percentile of all GPUs, and its 3DMark Steel Nomad DX12 score of 3,322 shows it is a capable performer for modern games. In Roblox, the GPU’s role is less about raw compute and more about pixel fill rate and memory bandwidth, especially at 4K.

The data shows that the GPU becomes the limiting factor at 4K, where the frame rate on Low settings drops to 128 FPS from 226 FPS at 1440p. This 43.4% reduction is directly attributable to the GPU’s memory bandwidth and ROP count. The 8 GB VRAM is sufficient for Roblox, as the game’s textures are not particularly demanding, but the 128-bit bus is a constraint at higher resolutions. The GPU’s FP32 performance of 21.43 TFLOPS and texture rate of 334.9 GTexel/s are more than enough for Roblox’s simple geometry, but the pixel rate of 191.4 GPixel/s is what limits 4K performance. The RX 9060’s nearest rival, the RTX 3060 Ti, is 0.7% faster, which explains why the combo ranks where it does—the GPU is competent but not exceptional.

Measured FPS Breakdown

At 1920x1080, the measured frame rates are exceptionally high. On Low settings, the average FPS is 338, which drops to 308 on Medium, 272 on High, and 221 on Ultra. The Medium preset has a minimum FPS of 262 and a maximum of 354, showing a narrow range that indicates consistent performance. The delta between Low and Ultra is 117 FPS, which is significant, but even at Ultra, the frame rate is far above the refresh rate of most monitors. This resolution is clearly CPU-bound, as the GPU has plenty of headroom to spare.

At 2560x1440, the frame rates remain high but show a more pronounced drop. Low settings average 226 FPS, Medium 205 FPS, High 182 FPS, and Ultra 147 FPS. The Medium preset’s minimum and maximum are 175 FPS and 236 FPS, respectively. The gap between Low and Ultra narrows to 79 FPS, suggesting that the GPU is starting to take on a more significant load. The 1440p results are still excellent for competitive play, with even the Ultra preset exceeding 144 FPS.

At 3840x2160, the frame rates drop significantly. Low settings average 128 FPS, Medium 116 FPS, High 103 FPS, and Ultra 83 FPS. The Medium preset has a minimum of 99 FPS and a maximum of 134 FPS, indicating that frame times can spike in demanding scenes. The delta between Low and Ultra is 45 FPS, which is the smallest absolute difference across all resolutions. The 4K results show that the RX 9060 is the bottleneck, as the CPU is no longer able to push frame rates higher. The Ultra preset’s 83 FPS is still playable, but it is the only setting that dips below the 100 FPS threshold, making High the recommended preset for 4K gaming.