Roblox

Roblox is a notoriously CPU-light sandbox title, and this pairing of an Intel Core i5-12400F with an NVIDIA GeForce RTX 4080 produces an unusual bottleneck profile. The data shows frame rates that are exceptionally high across all settings, but the scaling patterns reveal where each component's workload truly lies. This analysis breaks down the measured results for this specific configuration.

Settings Recommendations

The measured FPS rows for this combo show that the Ultra preset is the only one that provides a meaningful challenge to the hardware, while the lower presets become increasingly limited by other factors. At 1080p, the Low preset delivers an average of 643 FPS, which is the highest figure recorded for this configuration. However, the gap between Low and High at this resolution is substantial, with High producing 517 FPS. This 126 FPS difference suggests that the graphics card is still doing significant work even at lower settings, but the CPU's six cores and twelve threads are beginning to dictate the ceiling.

For the best experience, the Medium preset at 1440p emerges as the sweet spot. The data shows an average of 390 FPS with a minimum of 332 FPS and a maximum of 449 FPS, which is the only row in the entire dataset that includes both minimum and maximum frame time data. This consistency is notable, as it indicates that the 1% lows are not collapsing under load. The Ultra preset at 1440p drops to 280 FPS, which is still highly playable but represents a 28% reduction from Medium. Given that the minimum frame rate data is only provided for Medium settings across all resolutions, the recommendation is to prioritize Medium for stable frame pacing.

At 4K, the Medium preset again provides the most balanced numbers, with an average of 221 FPS and a minimum of 188 FPS. The Ultra preset at this resolution falls to 158 FPS, which is the lowest average recorded in the entire dataset. While 158 FPS is still smooth for most displays, the jump from Medium to Ultra costs 63 FPS, or roughly 29% of the Medium performance. The data suggests that High settings at 4K, which produce 195 FPS, offer a better trade-off than Ultra, as the visual fidelity increase from High to Ultra does not justify the 37 FPS loss.

GPU Role

The NVIDIA GeForce RTX 4080 is built on the Ada Lovelace architecture with a 5 nm process from TSMC. It features 9728 shading units, 304 texture mapping units, and 112 raster output units, along with 76 ray tracing cores and 304 tensor cores. The GPU's base clock is 2205 MHz, boosting up to 2505 MHz, and it pairs 16 GB of GDDR6X memory on a 256-bit bus for a total bandwidth of 716.8 GB/s. The memory clock is 1400 MHz with 22.4 Gbps effective speed.

In Roblox, the GPU's role becomes more pronounced as resolution increases. The benchmark data shows that at 1080p Low, the RTX 4080 is barely stressed, producing 643 FPS. But at 4K Ultra, the same card delivers 158 FPS, which is a 75% reduction. This indicates that the GPU is the primary scaling component when moving from lower resolutions to 4K. The 16 GB of VRAM is more than sufficient for this sandbox title, as Roblox's asset streaming is not memory-intensive compared to modern AAA releases. The high bandwidth of 716.8 GB/s ensures that texture uploads and draw calls are handled without stutter, which is reflected in the relatively high minimum frame rates at Medium settings.

The GPU's average benchmark score of 54247 places it in the 86th percentile of all GPUs, and its nearest rival is the RTX 4080 SUPER, which scores 54209 with a delta of 0.1%. This near-identical performance is expected, as the SUPER variant is a minor refresh. The AMD Radeon Pro W5700X scores 54828, which is 1.1% higher, but this workstation card is not a direct consumer competitor. The data confirms that the RTX 4080 is a top-tier card, and in Roblox, it is never the limiting factor until 4K Ultra settings are enabled.

Resolution Scaling

The frame rate scaling across resolutions reveals a classic GPU-bound pattern at higher settings, but a CPU-bound pattern at lower settings. From 1080p Low to 1440p Low, the average FPS drops from 643 to 429, which is a 33% reduction. From 1440p Low to 4K Low, the drop is from 429 to 243 FPS, another 43% reduction. This steep decline at Low settings suggests that the GPU is still doing the heavy lifting, as the CPU has headroom to spare.

At High settings, the scaling is more moderate. 1080p High produces 517 FPS, 1440p High produces 345 FPS, and 4K High produces 195 FPS. The percentage drops are 33% and 43% respectively, which is nearly identical to the Low preset scaling. This consistency indicates that the rendering load scales linearly with pixel count, and the RTX 4080's compute resources are being utilized proportionally.

The Ultra preset shows the most dramatic scaling. 1080p Ultra yields 420 FPS, 1440p Ultra yields 280 FPS, and 4K Ultra yields 158 FPS. The drop from 1080p to 1440p is 33%, but the drop from 1440p to 4K is 44%. This suggests that at 4K Ultra, the GPU is hitting a more complex rendering path that increases the per-pixel cost beyond the simple resolution multiplier. The limiting component at 1080p and 1440p is likely the CPU's single-thread performance, as the Core i5-12400F has a boost clock of 4.40 GHz and a single-thread 3DMark score of 909. At 4K, the GPU becomes the primary limiter, as evidenced by the larger FPS drop.

How This Combo Ranks

This specific combination of the Core i5-12400F and RTX 4080 ranks 250th out of 3711 tested combos in Roblox. This places it in the top 6.7% of all configurations, which is a strong showing for a mid-range CPU paired with a high-end GPU. The rank is likely influenced by the CPU's moderate performance in a game that is not heavily threaded.

The Core i5-12400F has an average benchmark score of 19039, placing it in the 73rd percentile of all CPUs. Its nearest rival is the AMD Ryzen 5 7535HS, which scores 19047 with a delta of 0%. This is a tie in performance, despite the Ryzen being a mobile chip. The Intel Core 3 201E is 0.1% slower, and the Intel Core i5-1335U is 0.3% faster. This clustering suggests that the i5-12400F's performance is typical for its class, but it is not a standout.

The RTX 4080's 86th percentile rank is significantly higher than the CPU's 73rd percentile, which means the GPU is the stronger component in this pairing. The combo rank of 250 suggests that the CPU is holding back the GPU in Roblox, as other combos with faster CPUs likely achieve higher frame rates at lower resolutions. The data supports this: at 1080p Low, the 643 FPS figure is likely near the CPU's maximum output, while the GPU could theoretically render more frames if the CPU could feed it faster.

CPU Role

The Intel Core i5-12400F is a 6-core, 12-thread processor based on the Alder Lake architecture, manufactured 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. It supports DDR4 and DDR5 memory in a dual-channel configuration, and its PCIe interface is Gen 5 with 20 lanes from the CPU. The processor is not multiplier-unlocked, so overclocking is limited.

In Roblox, the CPU's role is primarily single-thread bound. The game's engine does not scale well across many cores, so the i5-12400F's single-thread performance is critical. The 3DMark single-thread score of 909 and the Cinebench R23 single-core score of 1680 indicate solid IPC, but not exceptional. The boost clock of 4.40 GHz helps, but the lack of a higher frequency limit means the CPU cannot push beyond its rated speed.

The benchmark data shows that at 1080p Low, the FPS reaches 643, which is likely close to the CPU's maximum frame generation rate for this game. The fact that lowering the resolution from 1080p to 1440p at Low settings only drops the FPS by 33% (from 643 to 429) suggests that the CPU is still the limiter at 1440p Low, as the GPU has enough headroom to render faster. At 4K Low, the FPS drops to 243, which indicates the GPU is now the bottleneck, as the CPU is still capable of generating more frames. The CPU's multicore performance, as shown by the Cinebench R23 multicore score of 12380, is not the limiting factor here; it is the single-thread speed that matters.

Measured FPS Breakdown

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

At 1920x1080, the Low preset delivers an average of 643 FPS. The Medium preset produces 585 FPS, with a minimum of 497 FPS and a maximum of 673 FPS. High settings yield 517 FPS, and Ultra settings produce 420 FPS. The progression from Low to Ultra shows a 35% reduction in performance, which is a significant penalty for the highest visual quality.

At 2560x1440, the Low preset averages 429 FPS. Medium averages 390 FPS, with a minimum of 332 FPS and a maximum of 449 FPS. High settings average 345 FPS, and Ultra settings average 280 FPS. The drop from Low to Ultra at this resolution is 35%, mirroring the 1080p scaling.

At 3840x2160, the Low preset averages 243 FPS. Medium averages 221 FPS, with a minimum of 188 FPS and a maximum of 254 FPS. High settings average 195 FPS, and Ultra settings average 158 FPS. The drop from Low to Ultra is 35% again, showing a consistent scaling pattern across all resolutions.

The Medium preset is the only one with min and max FPS data, and these values show that the frame rate variance is manageable. At 1080p Medium, the range from min to max is 176 FPS, while at 1440p it is 117 FPS, and at 4K it is 66 FPS. This narrowing range at higher resolutions indicates that the GPU's consistent frame pacing becomes more stable as the workload increases, reducing the chance of micro-stutter. The data confirms that this combo is capable of exceeding 240 FPS at 1080p and 1440p on all settings except Ultra, and it can maintain above 144 FPS at 4K on all settings except Ultra. For players with high refresh rate displays, the Medium preset at 1440p offers the best balance of speed and stability.