Roblox

The AMD Ryzen 9 9900X paired with the Intel Arc B390 produces a heavily CPU-bound experience in Roblox, where the integrated graphics solution acts as the primary bottleneck only at higher resolutions and settings. Benchmark data shows that this combo ranks 2661st out of 3010 tested combinations, placing it in the bottom 12th percentile, which reflects the Arc B390’s position as a low-tier iGPU rather than any deficiency in the Ryzen 9 9900X’s processing capability. The measured frames per second (FPS) figures across resolutions and settings reveal a system that delivers playable performance at 1080p, becomes increasingly strained at 1440p, and drops below smooth thresholds at 4K, particularly on higher quality presets.

Resolution Scaling

The FPS drop from 1080p to 4K in Roblox is substantial but not uniform across all settings, indicating that the limiting component shifts depending on the resolution and quality preset. At Low settings, the average FPS falls from 171 at 1920x1080 to 114 at 2560x1440, a reduction of 57 FPS (33.3%), and then to 64 at 3840x2160, another 50 FPS drop (43.9%). This steep decline suggests that even at the lowest settings, the Intel Arc B390’s rendering capabilities are being saturated as pixel count increases, despite the relatively simple graphical demands of Roblox.

At Medium settings, the scaling pattern shows similar behavior: 155 FPS at 1080p, 104 FPS at 1440p, and 59 FPS at 4K. The percentage drops are 32.9% from 1080p to 1440p and 43.3% from 1440p to 4K. High settings follow the same trend with 137 FPS at 1080p, 92 FPS at 1440p, and 52 FPS at 4K, representing declines of 32.8% and 43.5% respectively. Ultra settings exhibit the most severe scaling: 111 FPS at 1080p drops to 74 FPS at 1440p (33.3% loss) and then to 42 FPS at 4K (43.2% loss).

The consistency of these percentage drops across all four settings presets is notable. In every case, moving from 1080p to 1440p costs roughly one-third of the frame rate, and moving from 1440p to 4K costs an additional 43% of the remaining frames. This pattern strongly indicates that the GPU is the primary limiting factor at resolutions above 1080p, as the pixel throughput requirements scale with resolution in a way that the Arc B390’s 7.680 TFLOPS of FP32 performance cannot keep pace with. The fact that the relative drops are nearly identical whether the game runs at Low or Ultra settings suggests that Roblox’s graphical complexity at these quality levels does not dramatically alter the GPU’s workload compared to the sheer pixel count.

At 1080p, the picture changes. The gap between Low (171 FPS) and Ultra (111 FPS) is 60 FPS, which is a 35.1% reduction. This is a larger relative difference than what appears at higher resolutions, implying that at 1080p the CPU has more headroom to feed the GPU, allowing settings to influence performance more directly. However, the absolute FPS values at 1080p remain high across all presets, indicating that the Ryzen 9 9900X’s single-thread performance, which scores 1286 in 3dmark_single_thread and 2253 in Cinebench R23 single-core, is sufficient to drive Roblox’s game logic without becoming a major constraint at this resolution. The data shows that 1080p is the only resolution where this combo consistently exceeds 100 FPS on all tested settings, making it the clear target for smooth gameplay.

GPU Role

The Intel Arc B390 is an integrated graphics processor based on the Xe3-LPG architecture, built on Intel’s 3 nm process node with the Panther Lake chip. Its specifications reveal a modest design intended for basic rendering tasks rather than high-end gaming. The GPU has 1536 shading units, 48 texture mapping units, and 24 raster output units, with 12 ray tracing cores. Its boost clock reaches 2500 MHz, while the base clock sits at 300 MHz. The FP32 performance is rated at 7.680 TFLOPS, and the pixel rate is 60.00 GPixel/s with a texture rate of 120.0 GTexel/s. Memory is system-shared, meaning the GPU draws from the same DDR5 pool as the CPU, with bandwidth described as system dependent.

In 3DMark Steel Nomad DX12, the Arc B390 scores 1482, which places it at the 9th percentile among all GPUs. Its nearest rivals in benchmark scores are NVIDIA’s GeForce GT 520MX (1463, 1.3% slower), GeForce 800M (1460, 1.5% slower), GeForce GT 625 OEM (1446, 2.5% slower), and GeForce GT 710 (1443, 2.7% slower). This positioning makes it clear that the Arc B390 operates in the same performance tier as decade-old entry-level discrete GPUs, which explains why Roblox at 4K Ultra drops to just 42 FPS. The GPU’s low percentile ranking relative to all GPUs (9th) is the dominant factor in this combo’s overall poor standing.

The system-shared memory configuration means that the GPU’s bandwidth is not a fixed number but depends on the system’s DDR5 memory implementation. In Roblox, which is not particularly bandwidth-intensive compared to modern AAA titles, this shared arrangement does not appear to be the primary bottleneck based on the FPS data. Instead, the raw compute and fill-rate limits of the Arc B390 are what cap performance. The fact that the GPU’s boost clock of 2500 MHz is relatively high for an integrated part, yet the 3DMark score remains low, indicates that the architecture’s execution resources are limited, which is consistent with its 1536 shading units.

At 1080p Low, the combination achieves 171 FPS, which suggests the GPU can handle simple rendering tasks efficiently when pixel count is low. However, the steep FPS declines as resolution increases demonstrate that the Arc B390 lacks the memory bandwidth and processing power to maintain frame rates at higher pixel densities. The Ultra preset at 4K, which yields only 42 FPS, represents the worst-case scenario for this GPU, and even at 1080p Ultra the 111 FPS figure, while playable, shows a significant penalty compared to Low settings. The data indicates that the GPU role in this system is to provide adequate performance for lightweight games at modest resolutions, and Roblox at 1080p is within its capabilities, but anything beyond that pushes it to its limits.

CPU Role

The AMD Ryzen 9 9900X is a 12-core, 24-thread desktop processor based on the Zen 5 architecture, codenamed Granite Ridge, built on TSMC’s 4 nm process node. It has a base clock of 4.40 GHz and a boost clock of 5.60 GHz, with 64 MB of L3 cache and 1 MB of L2 cache per core. Its TDP is 120 W, and it supports DDR5 memory with a dual-channel configuration, offering 89.6 GB/s of memory bandwidth. The CPU scores in the 92nd percentile among all CPUs, with an average benchmark score of 57498. Its nearest rivals include the AMD EPYC 9015 (57555, 0.1% faster), AMD EPYC 7313 (57399, 0.2% slower), Intel Core i9-14900 (58115, 1.1% faster), and Intel Xeon Platinum 8260M (58323, 1.4% faster).

In multi-threaded benchmarks, the Ryzen 9 9900X delivers strong results: 32172 in Cinebench R23 multicore, 22174 in Geekbench multicore, and 13929 in 3dmark_max_threads. Single-thread performance is equally impressive, with 2253 in Cinebench R23 single-core, 3010 in Geekbench single-core, and 1286 in 3dmark_single_thread. These scores place the CPU far above the demands of Roblox, which is a game that relies heavily on single-thread performance for its game logic and physics simulation. The 12 cores and 24 threads are largely underutilized in this title, but the high boost clock of 5.60 GHz ensures that the primary thread runs as fast as possible.

The CPU’s role in this combo is to provide a stable foundation that does not bottleneck the GPU at lower resolutions. Evidence for this comes from the FPS scaling patterns: at 1080p, the frame rates are high enough (111-171 FPS depending on settings) that the CPU is likely the limiting factor in some cases, particularly at Low settings where the GPU has less work to do. The 3dmark_2_threads score of 2519 and 3dmark_4_threads score of 4886 indicate strong performance for lightly threaded workloads, which aligns with Roblox’s typical thread usage. The CPU’s 92nd percentile ranking among all CPUs contrasts sharply with the GPU’s 9th percentile, highlighting the imbalance in this pairing.

The Ryzen 9 9900X’s memory bandwidth of 89.6 GB/s, while modest compared to high-end desktop platforms, is more than sufficient for Roblox’s requirements. The system-shared GPU memory means that the CPU and GPU compete for the same memory resources, but the game’s low memory footprint likely prevents this from becoming a significant issue. The data shows that the CPU is not the primary constraint at 1440p and 4K, where the GPU’s limitations dominate, but at 1080p the CPU’s strong single-thread performance allows the GPU to reach its maximum potential, as evidenced by the 171 FPS at Low settings. This suggests that the Ryzen 9 9900X is capable of pushing much more powerful GPUs, and the Arc B390 is what holds this combo back.

How This Combo Ranks

The AMD Ryzen 9 9900X + Intel Arc B390 combination ranks 2661st out of 3010 tested combos in Roblox, placing it in the bottom 11.6% of all configurations. This low ranking is almost entirely attributable to the GPU, given the stark contrast between the CPU’s 92nd percentile standing and the GPU’s 9th percentile. The combo’s position reflects the reality that Roblox’s performance is limited by the weakest component in the system, and in this case, the Arc B390 is far weaker than the Ryzen 9 9900X is strong.

The ranking also contextualizes the FPS figures: while 52 FPS at 4K High and 42 FPS at 4K Ultra may seem low, they are consistent with a GPU that scores 1482 in 3DMark Steel Nomad DX12 and ranks alongside the GeForce GT 710. The combo’s rank of 2661 suggests that there are 349 tested combinations that perform worse, which likely include systems with even older integrated graphics or severely mismatched components. However, the vast majority of tested combos (about 88.4%) outperform this pairing, meaning that most discrete GPUs from the past decade would deliver better results in Roblox.

The deltaPct values from the CPU’s nearest rivals show that the Ryzen 9 9900X is competitive with server-class processors like the EPYC 9015 and EPYC 7313, as well as high-end desktop chips like the Core i9-14900. These deltas range from -1.4% to +0.2%, indicating that the CPU’s performance is within a narrow band of its peers. This further emphasizes that the CPU is not the issue. Similarly, the GPU’s nearest rivals, such as the GT 520MX and GT 710, are all within 2.7% of the Arc B390’s score, confirming that this iGPU is at the very bottom of the performance spectrum.

For Roblox specifically, the combo’s rank does not tell the whole story. At 1080p, the system achieves playable frame rates across all settings, with even Ultra running at 111 FPS. This means that despite the poor overall ranking, the combo can still deliver a satisfactory experience for players who stick to 1080p displays. The ranking becomes more problematic at higher resolutions, where the FPS drops below 60 at 4K for all settings except Low (64 FPS), and even 1440p Ultra only manages 74 FPS. The data suggests that this combo is best suited for 1080p gaming, and its low rank reflects its inability to handle higher resolutions in Roblox.

Measured FPS Breakdown

At 1920x1080, the combo delivers its best results. Low settings produce an average of 171 FPS, which is the highest figure recorded for this pairing. Medium settings drop to 155 FPS, with a minimum of 132 FPS and a maximum of 179 FPS, showing reasonable consistency. High settings yield 137 FPS, while Ultra settings bring the average down to 111 FPS. The spread from Low to Ultra is 60 FPS, and all presets remain above the 100 FPS threshold, making 1080p the only resolution where this combo consistently exceeds triple-digit frame rates. The minimum FPS recorded at 1080p Medium (132 FPS) indicates that even in demanding scenes, the system rarely drops below smooth levels.

At 2560x1440, performance degrades noticeably. Low settings average 114 FPS, which is still playable but represents a 33.3% drop from 1080p Low. Medium settings average 104 FPS, with a minimum of 88 FPS and a maximum of 119 FPS. High settings fall to 92 FPS, and Ultra drops further to 74 FPS. The gap between Low and Ultra at 1440p is 40 FPS (35.1% reduction), which is smaller in relative terms than at 1080p, suggesting that the GPU is becoming more of a limiting factor. The minimum FPS of 88 at Medium settings shows that occasional dips below 90 FPS occur, which could be noticeable on high-refresh-rate monitors.

At 3840x2160, the system struggles. Low settings average 64 FPS, which is the only preset that exceeds 60 FPS at this resolution. Medium settings drop to 59 FPS, with a minimum of 50 FPS and a maximum of 67 FPS. High settings average 52 FPS, and Ultra falls to 42 FPS. The minimum FPS of 50 at Medium indicates that the system can dip below 60 FPS even on moderate settings, which is problematic for smooth gameplay. The Ultra preset’s 42 FPS is below the 45 FPS threshold that many consider the minimum for acceptable playability, making it unsuitable for 4K on this hardware.

The measured data includes min and max FPS only for Medium settings at each resolution. At 1080p Medium, the range is 132-179 FPS, a spread of 47 FPS. At 1440p Medium, the range narrows to 88-119 FPS, a spread of 31 FPS. At 4K Medium, the range is 50-67 FPS, a spread of 17 FPS. This narrowing range as resolution increases further confirms that the GPU is becoming the bottleneck, as frame time variance decreases when the GPU is fully saturated. The average FPS at each resolution and setting combination follows a consistent pattern: Low > Medium > High > Ultra, with the differences between presets shrinking as resolution increases.

Settings Recommendations

Based on the measured FPS rows, the optimal settings for this combo depend on the target resolution and desired frame rate. For 1080p displays, the data shows that all settings are playable, but Medium settings (155 FPS average) offer the best balance between visual quality and performance headroom. The 132 FPS minimum at Medium ensures that even in complex scenes, the frame rate stays well above 60 FPS, providing a smooth experience. High settings (137 FPS) are also viable, but the 18 FPS difference between Medium and High suggests that the visual improvements may not justify the performance cost. Ultra settings (111 FPS) are playable but offer diminishing returns, and the 60 FPS gap between Low and Ultra indicates that the GPU is working harder without proportional gains.

For 1440p displays, Medium settings (104 FPS average) are the recommended choice. The minimum of 88 FPS at Medium means that the system occasionally dips below 90 FPS but rarely below 60 FPS, which is acceptable for most players. Low settings (114 FPS) provide more headroom, but the visual quality reduction may be noticeable in Roblox’s blocky aesthetic. High settings (92 FPS) are borderline, and the 74 FPS at Ultra is below the 90 FPS threshold that many players prefer for responsive gameplay. The data suggests that Medium is the sweet spot at 1440p, as it maintains an average above 100 FPS while offering better visuals than Low.

For 4K displays, the options are limited. Low settings (64 FPS) are the only preset that averages above 60 FPS, making it the sole recommendation for a smooth experience. Medium settings (59 FPS) are close but dip to 50 FPS at minimum, which can cause noticeable stuttering. High settings (52 FPS) and Ultra settings (42 FPS) are not recommended, as they fall below the 60 FPS threshold that is generally considered the baseline for playable performance. Players with 4K monitors should either run the game at Low settings or reduce the resolution to 1440p to access higher quality presets.

The overall recommendation is to prioritize 1080p with Medium or High settings for the best experience, as this resolution delivers the highest frame rates with the most stable minimum FPS. At 1080p Medium, the combo achieves 155 FPS average with a 132 FPS minimum, which is excellent for a system with a GPU that ranks in the 9th percentile. For players who insist on higher resolutions, 1440p Medium (104 FPS) is acceptable, while 4K should be avoided unless Low settings are acceptable, given the 64 FPS average and the potential for dips below 60 FPS. The data clearly indicates that this combo is designed for 1080p gaming, and settings should be adjusted accordingly to maximize the experience.