Roblox

Roblox is not a typical GPU stress test, yet the data for this Intel Core Ultra 5 245 + NVIDIA GeForce RTX 4090 pairing reveals a fascinating dynamic. The measured FPS numbers are exceptionally high across all settings, but the scaling pattern between resolutions tells a clear story about where the bottleneck lies in this specific combination. The data indicates a system that is profoundly overqualified for the title, yet the performance curve offers specific insights into how the CPU and GPU interact under Roblox's unique engine constraints.

Resolution Scaling

The frame rate drop from 1080p to 4K is surprisingly gentle, which is a strong indicator that the CPU, not the GPU, is the limiting factor. At High settings, the average FPS moves from 572 at 1920x1080 to 382 at 2560x1440, and finally to 216 at 3840x2160. That is a 62.2% reduction in frames from 1080p to 4K, but the absolute numbers remain so high that the GPU is clearly never struggling. The more telling comparison is between Low settings: 711 FPS at 1080p drops to 474 FPS at 1440p and 268 FPS at 4K. This 62.3% drop mirrors the High settings drop almost exactly, suggesting a consistent scaling factor rather than a GPU resource wall.

The data implies that as resolution increases, the GPU begins to take on more work, but the CPU is still able to feed it enough data to maintain incredibly high frame rates. The gap between Low and Ultra settings at the same resolution is substantial — at 4K, Low produces 268 FPS while Ultra produces 175 FPS, a 53.1% difference. However, this gap narrows at lower resolutions: at 1080p, the difference between Low (711 FPS) and Ultra (464 FPS) is 53.2%, which is nearly identical. This suggests that the performance penalty for higher settings is relatively constant regardless of resolution, pointing to a game engine that is primarily bound by single-threaded logic and draw calls rather than raw pixel throughput.

The fact that the RTX 4090, with its massive 24 GB of GDDR6X memory and 1.01 TB/s bandwidth, is only producing a 216 FPS average at 4K Ultra in a sandbox game like Roblox is a clear indication that the GPU is waiting on the CPU. The 14-core Intel Core Ultra 5 245, with its 3.50 GHz base clock and 5.10 GHz boost clock, is likely the primary constraint, especially given that Roblox is known for its dependence on single-core performance. The data shows that the GPU is not the bottleneck; the CPU's ability to process game logic and physics is what caps the frame rate.

How This Combo Ranks

This specific combination of CPU and GPU ranks 135th out of 3010 tested combos for Roblox. That places it in the top 4.5% of all configurations tested, which is impressive but also somewhat paradoxical. The CPU alone has a percentile rank of 90 versus all CPUs, and the GPU has a percentile rank of 88 versus all GPUs, yet the combo does not crack the top 100. This suggests that other combinations, likely with CPUs that have even higher single-core performance, are achieving better results in this specific game.

The data indicates that the RTX 4090 is not the limiting factor here. Its average benchmark score of 60347 is nearly identical to the Intel Arc Pro A60 (60326) and AMD Radeon Pro Vega 48 (60140), with delta percentages of 0 and 0.3 respectively. This clustering shows that the GPU's raw compute power is not being fully utilized in Roblox. The CPU's nearest rivals tell a similar story: the AMD Ryzen 7 PRO 5755G scores 49196 (only 0.4% higher), the AMD Ryzen 9 7900 scores 49228 (0.5% higher), and the Intel Core i5-14600K scores 48618 (0.8% lower). These are all very close scores, indicating that the CPU's general compute performance is solid but not exceptional.

The rank of 135 suggests that there are 134 other combos that perform better in Roblox, likely due to CPUs with higher clock speeds or better single-threaded performance. The Core Ultra 5 245 has a single-thread score of 4394 in Passmark, which is respectable, but it is not a top-tier overclocking chip. The data implies that for Roblox, the CPU's single-core speed is far more important than the GPU's raw power, and this combo's rank reflects that the GPU's enormous potential is somewhat wasted in this title.

GPU Role

The NVIDIA GeForce RTX 4090 is a behemoth of a GPU, with 16384 shading units, 512 TMUs, and 176 ROPs. Its 24 GB of GDDR6X memory on a 384-bit bus provides a staggering 1.01 TB/s of bandwidth. The boost clock of 2520 MHz and base clock of 2235 MHz are among the highest for any consumer GPU. Yet, in Roblox, the data shows that these specifications are largely irrelevant to the frame rates achieved.

The measured FPS at 4K Ultra is 175 FPS, which is above the refresh rate of most monitors, but it is not the 400+ FPS that the GPU's raw compute might suggest it could deliver. The GPU's benchmark scores are telling: its Passmark G3D score is 38194, but its DirectX 11 score is only 326, and DirectX 10 is 224. These lower DirectX scores hint at potential driver or API overhead issues in certain workloads, which could be affecting Roblox, a game that historically uses older rendering paths.

The VRAM capacity is not a factor here; 24 GB is overkill for a game like Roblox, which typically uses a fraction of that. The memory clock of 1313 MHz (21 Gbps effective) and the 384-bit bus width are similarly underutilized. The data suggests that the GPU is operating well within its comfort zone, never approaching its thermal or power limits (450 W TDP). The GPU's role in this combo is to simply render the frame as fast as the CPU can deliver it, and the RTX 4090 is more than capable of doing that. The bottleneck is definitively not on the GPU side, as evidenced by the high FPS at 4K being only 216 at High settings, which is still far above playable thresholds.

Measured FPS Breakdown

Examining the measured FPS data row by row reveals a consistent pattern. At 1920x1080, the Low setting produces an average of 711 FPS, Medium 647 FPS, High 572 FPS, and Ultra 464 FPS. The Medium setting has a recorded minimum of 550 FPS and maximum of 744 FPS, showing a tight frame time distribution. The 1080p numbers are so high that they are likely limited by the CPU's ability to process the game's simulation loop, not the GPU's rendering speed.

Moving to 2560x1440, the averages drop to 474 FPS (Low), 432 FPS (Medium), 382 FPS (High), and 310 FPS (Ultra). The Medium setting at 1440p shows a minimum of 367 FPS and a maximum of 496 FPS, indicating that even in the most demanding scenes, the frame rate stays well above 300 FPS. This resolution is likely where the GPU starts to have a slightly more significant role, but the FPS is still so high that the CPU is likely still the primary limiter.

At 3840x2160, the averages are 268 FPS (Low), 244 FPS (Medium), 216 FPS (High), and 175 FPS (Ultra). The Medium setting at 4K has a minimum of 208 FPS and a maximum of 281 FPS. The drop from Low to Ultra at 4K is 93 FPS, which is the largest absolute gap across all resolutions. This suggests that at 4K, the GPU's workload is starting to matter more, but even the highest setting produces a frame rate that is far above the standard 60 FPS target. The data shows that this combo is capable of running Roblox at maximum settings at 4K with a comfortable margin over typical display refresh rates.

FAQ

Q: Is the RTX 4090 overkill for Roblox?

A: The data strongly suggests yes. At 1080p High, the combo achieves 572 FPS, and at 4K Ultra it still manages 175 FPS. These numbers are far beyond what any standard monitor can display, indicating the GPU's massive compute resources (82.58 TFLOPS FP32) are largely idle, waiting on the CPU.

Q: What is the best resolution for this combo in Roblox?

A: Based on the data, 2560x1440 at High settings offers the best balance, delivering 382 FPS. This is well above any refresh rate and allows the GPU to do a bit more work. However, 4K Ultra at 175 FPS is also perfectly playable and makes better use of the GPU's 24 GB of VRAM.

Q: Does the CPU bottleneck the GPU in this game?

A: Yes, the data indicates this. The FPS scaling from 1080p to 4K is not proportional to the pixel count increase, and the CPU's 14 cores (14 threads) with a 5.10 GHz boost clock are likely the limiting factor for Roblox's single-threaded game logic.

Q: How does this combo rank compared to others?

A: It ranks 135th out of 3010 tested combos for Roblox, placing it in the top 4.5%. This is high, but not at the very top, suggesting that CPUs with even higher single-core performance can achieve better frame rates in this game.

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

A: The data shows a 93 FPS difference, with Low averaging 268 FPS and Ultra averaging 175 FPS. This is a significant drop but still leaves the frame rate high enough for smooth gameplay.

Q: Are the frame rates stable?

A: The data includes minimum FPS values for Medium settings at each resolution. At 1080p, the minimum is 550 FPS (versus 647 average), at 1440p it's 367 FPS (versus 432 average), and at 4K it's 208 FPS (versus 244 average). This indicates good frame time consistency, though the min FPS is notably lower than the average.

Settings Recommendations

The measured data provides clear guidance on which settings offer the best experience. For 1080p, the Low setting at 711 FPS is excessive and not useful unless chasing extreme frame rates for competitive play. The High setting at 572 FPS offers a better visual experience while still being far above any refresh rate. For 1440p, High at 382 FPS is the sweet spot, as it provides excellent visual quality and a frame rate that exceeds any display capability. The Ultra setting at 310 FPS is also viable if visual fidelity is the priority.

For 4K, the High setting at 216 FPS is the recommended choice. It delivers a significantly higher frame rate than Ultra (175 FPS) with a minimal visual quality difference in a game like Roblox, which has a relatively simple art style. The Medium setting at 4K (244 FPS) is also a strong option, offering a 28 FPS boost over High with a slight reduction in visual effects. The data suggests that Medium is the most efficient setting at 4K, as it provides a high frame rate with a recorded minimum of 208 FPS, ensuring smooth performance even in complex scenes.

The Ultra preset, while visually the most demanding, offers diminishing returns. The 53.1% drop from Low to Ultra at 4K is not justified by the visual improvements in a game with Roblox's aesthetic. Therefore, the recommended setting for this combo is High at any resolution, with Medium being a viable alternative for those who prioritize frame rate stability over visual polish.

CPU Role

The Intel Core Ultra 5 245 is a 14-core, 14-thread processor based on the Arrow Lake architecture, manufactured on a 3 nm process by TSMC. Its base clock of 3.50 GHz and boost clock of 5.10 GHz are competitive, but its performance in Roblox is revealing. The CPU's Passmark single-thread score is 4394, and its Cinebench R23 single-core score is 4648. These are solid numbers, but they are not the absolute highest available.

In Roblox, the data indicates that the CPU is the primary bottleneck. The game's engine is likely not well-optimized for multi-threading, so the 14 cores are not fully utilized. The CPU's 24 MB of L3 cache and 3 MB of L2 cache per core are adequate, but the game's performance is more dependent on clock speed and IPC (instructions per cycle) than on cache size. The CPU's nearest rivals, such as the AMD Ryzen 9 7900, have similar average benchmark scores (49228 versus 49228 for this CPU), confirming that the Core Ultra 5 245 is in the same performance tier.

The data suggests that for Roblox, a CPU with a higher boost clock or better single-core performance would yield higher frame rates. The CPU's 65 W TDP is low, which is good for thermals, but it also means the processor is designed for efficiency rather than extreme performance. The lack of a multiplier unlock means that overclocking is not possible, further limiting the potential to improve Roblox performance. The CPU's integrated graphics (Arc Xe-LPG Graphics 64EU) are irrelevant in this combo, as the RTX 4090 handles all rendering. The CPU's role is to provide the game logic and physics calculations, and its performance in this area, while strong, is the limiting factor for the ultra-high frame rates this GPU could theoretically produce.