Roblox

The AMD Ryzen 7 5700G paired with the Intel Arc B390 presents a curious case in Roblox, a game known for its scalability across a wide range of hardware. This combination, ranking in the lower tier of tested configurations, yields playable frame rates across most settings, though the data reveals a significant bottleneck that shapes the entire experience. The measured results show a system where the integrated-class graphics solution is the primary constraint, yet the 8-core CPU ensures the game remains fluid even when visual fidelity is pushed.

Resolution Scaling

The transition from 1080p to 4K exposes a stark and predictable decline in performance, indicating a system heavily limited by its graphics processor. At 1080p with High settings, the combo produces 137 FPS. Moving to 1440p drops that to 92 FPS, a 33% reduction, and then to 52 FPS at 4K, which is a further 43% drop from the 1440p figure. This scaling pattern is a classic symptom of a GPU-bound scenario; as the pixel count increases, the rendering workload expands faster than the Intel Arc B390 can compensate.

The data suggests that at 1080p, the CPU still has some headroom to feed the GPU, but that headroom evaporates quickly. The gap between Low settings at 1080p (171 FPS) and Low settings at 4K (64 FPS) is a massive 107 FPS, or 62.5%. This is not a subtle degradation; it is a cliff. The Arc B390, with its modest 7.680 TFLOPS of FP32 compute, simply cannot maintain the fill rate required for 4K Roblox, regardless of the settings preset.

Interestingly, the frame rate drop from Medium to Ultra at each resolution is more moderate than the resolution scaling. At 1440p, Medium runs at 104 FPS while Ultra runs at 74 FPS, a 29% penalty for the highest quality. At 4K, that same settings jump goes from 59 FPS to 42 FPS, a 29% reduction as well. This implies the GPU is the limiting factor in both cases; the additional shader work for Ultra settings is proportionally costly, but the resolution increase is what truly cripples the hardware. The conclusion is inescapable: this setup is for 1080p or maybe 1440p gaming, with 4K being a technical possibility only at the cost of smoothness.

GPU Role

The Intel Arc B390 is the decisive component in this pairing, and its specifications paint a clear picture of its capabilities. With a boost clock of 2500 MHz and 1536 shading units, it produces a pixel rate of 60.00 GPixel/s and a texture rate of 120.0 GTexel/s. These figures are modest, placing the GPU in the 9th percentile of all tested graphics cards, according to the database. Its nearest rivals include the NVIDIA GeForce GT 710 and GT 625 OEM, which are entry-level parts from a bygone era.

The memory configuration is a major point of analysis. The B390 uses "System Shared" memory, meaning it has no dedicated VRAM and instead borrows from the system's DDR4 RAM. The bandwidth is listed as "System Dependent," which means the performance is not just tied to the GPU's own capabilities but also to the speed of the host system's memory. This is a significant bottleneck for a game like Roblox, which, while not graphically intense, still needs to stream textures and geometry. The lack of dedicated VRAM likely contributes to the notable frame dips, such as the 50 FPS minimum seen at 4K Medium settings.

The GPU's performance in 3DMark Steel Nomad DX12, a score of 1482, places it just 1.3% ahead of the GT 520MX, confirming its low-end status. In Roblox, this translates to a hard ceiling on frame rates. Even at 1080p Low, the system cannot reach 200 FPS, topping out at 171 FPS. This is not a CPU limitation; it is the B390 hitting its architectural limits. The data implies that the GPU is working at near maximum capacity in almost all scenarios, leaving no headroom for future updates or more demanding user-created content within Roblox.

How This Combo Ranks

Within the comprehensive database of 3010 tested combinations, this specific pairing of the Ryzen 7 5700G and Intel Arc B390 ranks at 2661. This places it in the bottom 12% of all configurations, a clear indicator of its overall performance class. While it is not the worst possible setup, it is far from a mid-range performer. The rank suggests that most other combinations of CPUs and GPUs offer a better experience in this title.

This low ranking is almost entirely attributable to the GPU. The Ryzen 7 5700G itself is a capable processor, scoring in the 79th percentile of all CPUs. Its nearest rivals include the Intel Core i9-9900K and the Intel Core i5-14400T, which are solid mid-to-high-end parts from their respective generations. The CPU's average benchmark score of 27051 is nearly identical to the Core i9-9900K's 27097, with a deltaPct of -0.2%. This shows the 5700G is no slouch in compute tasks.

The stark contrast between the CPU's high percentile (79) and the GPU's low percentile (9) creates an unbalanced system. The combo's rank of 2661 is a direct result of this mismatch. In Roblox, where frame rates are often more dependent on the CPU's single-thread performance, the 5700G's strong showing is what prevents the system from falling even lower in the rankings. However, the GPU's inability to keep up at higher resolutions caps the system's potential, keeping it firmly in the lower quartile of all tested configurations.

Measured FPS Breakdown

The measured FPS data provides a complete picture of the system's performance across three resolutions and four settings presets. At 1920x1080, the system is at its best. Low settings yield an average of 171 FPS, which is excellent for a smooth experience. Medium settings drop this to 155 FPS, with a minimum of 132 FPS and a maximum of 179 FPS, indicating a stable frame pacing. High settings bring the average down to 137 FPS, while Ultra produces 111 FPS. All 1080p results are comfortably above 60 FPS, making this resolution the sweet spot for the combo.

Moving to 2560x1440, the performance drops significantly but remains playable. Low settings average 114 FPS, while Medium dips to 104 FPS (min 88, max 119). High settings yield an average of 92 FPS, and Ultra drops to 74 FPS. The minimum frame rates at Medium (88 FPS) suggest there is still enough headroom to avoid major stutters. For most users, 1440p with Medium or High settings would provide a very good balance of visual quality and performance.

At 3840x2160, the system struggles to maintain high frame rates. Low settings average 64 FPS, which is just above the 60 FPS threshold. Medium settings drop to 59 FPS (min 50, max 67), and High settings average 52 FPS. Ultra is the only unplayable preset, with an average of just 42 FPS. The minimum of 50 FPS at Medium settings points to occasional dips that could feel jarring. The data clearly shows that 4K is only viable on Low settings, and even then, it is not ideal for high-refresh-rate monitors.

FAQ

Q: Can this system run Roblox at 4K?

A: Yes, but only on Low settings, where it averages 64 FPS. Medium settings average 59 FPS, while High and Ultra drop to 52 and 42 FPS respectively, which are less desirable for a smooth experience.

Q: What is the best resolution for this combo?

A: The data shows 1920x1080 is optimal. All settings presets, from Low (171 FPS) to Ultra (111 FPS), deliver frame rates well above 60 FPS, ensuring a fluid experience.

Q: How does the Intel Arc B390 compare to its closest rivals?

A: The Arc B390 has an average benchmark score of 1482. This puts it 1.3% ahead of the NVIDIA GeForce GT 520MX, 1.5% ahead of the GeForce 800M, and 2.7% ahead of the GeForce GT 710.

Q: Is the CPU or GPU the limiting factor in this game?

A: The GPU is the primary bottleneck. The GPU's low percentile rank (9) compared to the CPU's high rank (79) indicates the graphics card cannot keep up with the processor, especially at higher resolutions.

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

A: At 1080p, moving from Low to Ultra settings reduces the average frame rate from 171 FPS to 111 FPS, a decrease of 60 FPS or 35%.

Q: How stable are the frame rates at 1440p?

A: The data shows good stability. At 1440p Medium settings, the average is 104 FPS with a minimum of 88 FPS and a maximum of 119 FPS, indicating only minor fluctuations.

Settings Recommendations

According to the measured rows, the optimal experience for this hardware is at 1920x1080. For users with high-refresh-rate monitors (144Hz or higher), the Low preset at 171 FPS offers the best chance of hitting maximum refresh rates. However, for a balance of visual fidelity and smoothness, the Medium preset at 155 FPS (min 132, max 179) is the recommended choice. It provides a significant visual upgrade over Low while maintaining a frame rate that is indistinguishable from the Low setting for most users. The High preset at 137 FPS is also a strong option if you prefer slightly better visuals over the extra headroom.

For those who must play at 2560x1440, the Medium preset is the recommended choice. It delivers an average of 104 FPS with a minimum of 88 FPS, which is still very smooth. The High preset at 92 FPS is acceptable, but users might notice minor dips in busy scenes. The Ultra preset at 74 FPS is playable but is the edge of what is comfortable, and the Low preset at 114 FPS is a better choice if you prioritize frame rate above all else.

At 3840x2160, the recommendations are limited. The only preset that maintains an average above 60 FPS is Low, at 64 FPS. This should be used if 4K is a hard requirement. The Medium preset at 59 FPS is technically playable but the minimum of 50 FPS suggests potential for noticeable stuttering. It is best to avoid High (52 FPS) and Ultra (42 FPS) presets at this resolution as they do not provide a consistently smooth experience.

CPU Role

The AMD Ryzen 7 5700G is the unsung hero of this configuration. It is an 8-core, 16-thread processor based on the Zen 3 architecture, with a base clock of 3.80 GHz and a boost clock of 4.60 GHz. Its benchmark scores are robust; for example, it achieves a Cinebench R23 multi-core score of 12830.5 and a single-core score of 1494. This single-core performance is critical for Roblox, which relies heavily on a few threads for game logic and physics.

The CPU's strength is evident when comparing its average benchmark score of 27051 to its rivals. It is nearly identical to the Intel Core i9-9900K (27097, deltaPct -0.2%) and the AMD Ryzen AI 7 445 (26936, deltaPct 0.4%). This shows that in raw computational power, the 5700G is competitive with parts that are often paired with much stronger dedicated GPUs. In Roblox, this CPU power ensures that the game logic and rendering commands are processed without delay, preventing CPU-bound stutters.

However, the CPU's high percentile rank (79) cannot compensate for the GPU's limitations. The data implies that in this specific game, the CPU is ready to deliver far more frames than the Arc B390 can render. The evidence is in the 1080p Low setting, where the system hits 171 FPS. If the CPU were the bottleneck, this number would be closer to the maximum refresh rate of the monitor or the theoretical limit of the game engine. Instead, the GPU's fill rate and memory bandwidth cap the output. The 5700G is a powerful engine, but it is attached to a drivetrain that cannot fully utilize its output in this graphics-bound scenario.