Roblox

Resolution Scaling

The measured frame rates across resolutions reveal a classic CPU-bound scenario in Roblox for this pairing. At 1080p, the AMD Ryzen 5 4600G dictates performance; the RTX 4090 has massive headroom, so moving from Low to High settings only shifts the average from 608 FPS to 559.4 FPS. This narrow 48.6 FPS gap indicates the GPU is not the limiting factor at this resolution.

Scaling to 1440p, the data shows a clear drop, but the pattern remains CPU-leaning. The Low setting average falls from 608 FPS at 1080p to 477.1 FPS, a reduction of 130.9 FPS. At High settings, the drop is from 559.4 FPS to 383.9 FPS. The GPU is beginning to take on more work, but the framerates are still extremely high, suggesting that the 6-core processor is still the primary bottleneck, particularly in less demanding scenes.

At 4K (3840x2160), the balance shifts. The High setting average drops significantly to 214.5 FPS, while Ultra yields 175.8 FPS. The delta between Low (266.5 FPS) and High (214.5 FPS) is now 52 FPS, a larger spread than at 1080p. This indicates that at 4K, the RTX 4090's workload becomes substantial enough to influence performance more meaningfully, though the absolute numbers are still far above the refresh rates of most displays. The limiting component transitions from being almost entirely CPU-bound at 1080p to a more balanced but still CPU-leaning state at 4K, as the GPU's rendering demands increase with pixel count.

CPU Role

The AMD Ryzen 5 4600G is a 6-core, 12-thread processor based on the Zen 2 architecture, codenamed Renoir, built on a 7 nm process. Its base clock is 3.70 GHz with a boost clock of 4.20 GHz. In synthetic benchmarks, it scores 1,919 points in Cinebench R23 single-core and 13,593 in multi-core. These numbers are modest for a modern desktop CPU, especially when paired with a flagship GPU.

Roblox is a game that is not heavily multi-threaded; its performance is often gated by single-thread speed and the efficiency of the game's engine. The data supports this: at 1080p, the average FPS remains high across all settings, but the ceiling is clearly capped by the CPU's ability to feed frames. The 3DMark single-thread score of 726 and the PassMark single-thread score of 2,653 are not competitive with high-end desktop parts, which explains why the system cannot push past the 600 FPS mark even at Low settings.

The CPU's memory bandwidth of 51.2 GB/s and dual-channel DDR4 support are adequate, but they do not provide the low-latency, high-throughput environment that a top-tier CPU would. The L3 cache is 8 MB shared, which is small by modern standards. Benchmark results indicate that the 4600G is the performance anchor in this combo. Its 75th percentile ranking versus all CPUs, while respectable, is far below the GPU's 91st percentile, creating a significant imbalance that manifests in the measured FPS data.

GPU Role

The NVIDIA GeForce RTX 4090 is an absolute powerhouse. With 16,384 shading units, 128 RT cores, and 512 tensor cores, it is built on the Ada Lovelace architecture at a 5 nm process node. Its memory subsystem is enormous: 24 GB of GDDR6X on a 384-bit bus, providing 1.01 TB/s of bandwidth. The boost clock is 2520 MHz, and its FP32 compute is rated at 82.58 TFLOPS.

In this specific pairing, the RTX 4090's role is largely underutilized. The GPU's PassMark G3D score is 38,194, and its percentile versus all GPUs is 91. However, the measured FPS in Roblox is not limited by the GPU's raw fill rate or shader power. The evidence is in the 1080p results: the difference between Low and Ultra is only 146.7 FPS (from 608 to 461.3). If the GPU were the bottleneck, this spread would be much larger as the settings increase the pixel shading and texture work.

The GPU's massive memory bandwidth of 1.01 TB/s and 24 GB VRAM are irrelevant for Roblox's modest texture and geometry demands. The data suggests that the RTX 4090 is idling for most of the test, waiting for the CPU to submit draw calls. At 4K, the GPU starts to show its importance; the Ultra setting average of 175.8 FPS is 40.7 FPS lower than the High setting, demonstrating that the GPU's workload is finally scaling with resolution. Even so, the RTX 4090 is never stressed to its limits, given that all 4K averages are above 175 FPS.

Measured FPS Breakdown

The measured data provides a comprehensive view of performance across three resolutions and four settings.

At 1920x1080, the averages are as follows: Low 608 FPS, Medium 588.8 FPS, High 559.4 FPS, Ultra 461.3 FPS. The drop from Low to Ultra is 146.7 FPS, which is a 24.1% reduction. This is a modest penalty for maxing out settings, confirming the CPU bottleneck.

Moving to 2560x1440, the numbers are: Low 477.1 FPS, Medium 430.6 FPS, High 383.9 FPS, Ultra 309.7 FPS. The spread from Low to Ultra is 167.4 FPS. The gap between Medium and High (46.7 FPS) is larger than the gap between Low and Medium (46.5 FPS), but all values remain exceptionally high.

At 3840x2160, the averages are: Low 266.5 FPS, Medium 244.1 FPS, High 214.5 FPS, Ultra 175.8 FPS. The delta from Low to Ultra is 90.7 FPS. Here, the GPU is more active, as evidenced by the larger percentage drop from High to Ultra (38.7 FPS, an 18% reduction) compared to the same transition at 1080p (98.1 FPS, a 17.5% reduction). The absolute numbers are still far beyond playable thresholds, but the scaling shows the GPU taking on more responsibility.

The data consistently shows that the RTX 4090 is not the limiting factor. The FPS at 1080p Low is 608, which is near the CPU's maximum output for this game. The GPU's potential is only realized as resolution increases, but even at 4K Ultra, the 175.8 FPS figure is far below what the RTX 4090 could achieve in a balanced system.

How This Combo Ranks

This combination of the AMD Ryzen 5 4600G and the NVIDIA GeForce RTX 4090 ranks 72nd out of 1,800 tested combos for Roblox. This puts it in the top 4% of all configurations. The ranking is surprisingly high, given the CPU's modest specs, but it reflects the game's light CPU demands and the GPU's ability to handle any rendering task thrown at it.

The ranking makes sense when considering the rivals. The CPU's nearest rival, the AMD Ryzen 3 PRO 5355GE, has an identical average benchmark score (17,482 vs. 17,489), with a deltaPct of 0. This means the 4600G is essentially interchangeable with that part in a CPU-bound scenario. The Intel Core i5-12450H is only 0.1% faster, while the Intel Core i3-14100T is 0.8% slower. These tiny differences in CPU scores do not translate to meaningful FPS differences in Roblox, as the game is not sensitive to small CPU variations once a baseline is met.

The RTX 4090's rivals are similarly close in GPU compute: the NVIDIA Tesla T4 is 0.4% faster, the Tesla P40 is 0.5% slower, and the AMD Radeon Pro Vega 56 is 0.9% slower. None of these are gaming cards, but the benchmark scores are comparable. In practice, the RTX 4090 is far superior for gaming, but the ranking is based on the measured FPS, which is capped by the CPU.

The 72nd rank out of 1,800 is a strong result, but it is not indicative of a balanced system. The data suggests that many combos with a weaker GPU and a stronger CPU would achieve similar or better FPS in Roblox, as the game's performance is gated by the processor. The high rank reflects the RTX 4090's ability to avoid being a bottleneck, but it does not change the fact that the 4600G limits the overall experience.

FAQ

Q: What is the highest average FPS recorded for this combo?

A: The highest average FPS is 608, recorded at 1920x1080 with Low settings.

Q: How much does performance drop from 1080p to 4K at High settings?

A: At High settings, the average FPS drops from 559.4 at 1080p to 214.5 at 4K, a reduction of 344.9 FPS.

Q: Is the CPU or GPU the main bottleneck in this system?

A: The data indicates the CPU is the primary bottleneck at 1080p and 1440p, as FPS is largely independent of settings. At 4K, the GPU begins to contribute more, but the CPU still caps performance.

Q: What is the combo's rank among all tested configurations?

A: The combo ranks 72nd out of 1,800 tested combos in Roblox.

Q: How does the CPU compare to its nearest rival in synthetic benchmarks?

A: The AMD Ryzen 5 4600G has an average benchmark score of 17,489, which is identical to the AMD Ryzen 3 PRO 5355GE (deltaPct of 0) and 0.1% slower than the Intel Core i5-12450H.

Q: What is the difference in average FPS between Low and Ultra settings at 4K?

A: At 3840x2160, the average FPS drops from 266.5 on Low to 175.8 on Ultra, a difference of 90.7 FPS.