Roblox

Roblox is a peculiar case for high-end hardware. With the Intel Core i9-14900K and AMD Radeon RX 7900 XT, the data shows a system that is overwhelmingly capable, yet the frame rate scaling reveals a title that is increasingly CPU-bound as resolution drops. This combination sits at rank 386 out of 1800 tested combos, placing it in the top quarter of all systems, but the performance deltas across settings tell a more nuanced story about where the bottleneck actually lives.

Resolution Scaling

The frame rate drop from 1080p to 4K is steep, but the pattern is not what you would expect from a typical GPU-bound title. At 1080p with Low settings, the combo produces 544.7 FPS. Moving to 1440p Low drops that to 362.2 FPS, a decline of 33.5%. At 4K Low, the average falls to 207.6 FPS, which is a further 42.7% reduction from the 1440p result. This scaling is aggressive, but the absolute numbers remain far above playable thresholds.

The Ultra preset tells a different story. At 1080p Ultra, the system delivers 351.1 FPS. At 1440p Ultra, it drops to 234.5 FPS, and at 4K Ultra, it bottoms out at 135.6 FPS. The gap between Low and Ultra at the same resolution is also telling. At 1080p, the difference between Low (544.7 FPS) and Ultra (351.1 FPS) is 193.6 FPS, a 35.5% penalty for higher visual fidelity. At 4K, that same Low-to-Ultra delta is only 72 FPS, shrinking to a 34.7% penalty. This compression of the settings gap at higher resolutions indicates that the GPU is starting to become the limiting factor at 4K, whereas at 1080p, the CPU is doing most of the heavy lifting to keep frame rates absurdly high.

GPU Role

The AMD Radeon RX 7900 XT is a 5nm part with a Navi 31 chip, featuring 5376 shading units and a 320-bit memory bus paired with 20 GB of GDDR6 memory. The memory clock runs at 2500 MHz, with an effective data rate of 20 Gbps, yielding 800.0 GB/s of bandwidth. The boost clock is 2394 MHz, while the game clock is listed at 2025 MHz. These specifications are substantial, but the benchmark results suggest that Roblox is not a title that stresses the GPU's raw compute or memory bandwidth heavily.

The data shows the GPU achieving a 3DMark Steel Nomad DX12 score of 5623 and a Passmark G3D score of 29009. Its percentile rank against all GPUs is 82, which is solid, but the nearest rivals list is curious. The RX 7900 XT scores within 0.6% of the NVIDIA GeForce RTX 4080 Mobile and within 0.3% of the NVIDIA CMP 70HX, yet it also sits just 0.4% behind the NVIDIA GeForce MX570. This clustering suggests that the synthetic benchmarks are not fully capturing the card's real-world capability in this specific game. The pixel rate of 459.6 GPixel/s and texture rate of 804.4 GTexel/s are high, but Roblox's blocky aesthetic likely doesn't require heavy texture work, which explains why the card can push 544.7 FPS at 1080p Low without breaking a sweat.

CPU Role

The Intel Core i9-14900K is a 24-core, 32-thread processor from the Raptor Lake refresh, with a base clock of 3.20 GHz and a boost clock of 6.00 GHz. It has a 36 MB shared L3 cache and supports DDR4 and DDR5 memory. Its Cinebench R23 multi-core score is 49872, and single-core is 7040. The Passmark single-thread score is 4697. These numbers are elite, placing the CPU in the 97th percentile of all processors.

The CPU's influence on Roblox is evident in the 1080p results. At 1080p Low, the system hits 544.7 FPS, which is a frame rate that most GPUs cannot sustain without a very strong CPU to feed them. The fact that the frame rate drops so dramatically when moving to 1440p (362.2 FPS) and 4K (207.6 FPS) indicates that the GPU is becoming the bottleneck at higher resolutions, but the CPU is clearly capable of driving frame rates far beyond what a typical 60Hz or 144Hz monitor can display. The i9-14900K's nearest rival, the AMD EPYC 7413, scores 80041 on average, just 0.3% higher, while the Intel Core i9-14900KF trails by 0.7%. This shows the CPU is performing right at the expected level for its class.

Measured FPS Breakdown

At 1920x1080, the results are as follows: Low settings produce an average of 544.7 FPS, Medium produces 493.3 FPS, High produces 437.6 FPS, and Ultra produces 351.1 FPS. The step from Low to Medium is a 51.4 FPS drop, from Medium to High is 55.7 FPS, and from High to Ultra is 86.5 FPS. The largest penalty comes from the High-to-Ultra transition, suggesting that Ultra enables some expensive effects that disproportionately impact frame rate.

At 2560x1440, the averages are 362.2 FPS for Low, 331.7 FPS for Medium, 288.5 FPS for High, and 234.5 FPS for Ultra. The Low-to-Medium drop is 30.5 FPS, Medium-to-High is 43.2 FPS, and High-to-Ultra is 54 FPS. The scaling is more linear here, but the total range from Low to Ultra is 127.7 FPS. At 3840x2160, the averages are 207.6 FPS for Low, 184.5 FPS for Medium, 164.4 FPS for High, and 135.6 FPS for Ultra. The Low-to-Medium drop is 23.1 FPS, Medium-to-High is 20.1 FPS, and High-to-Ultra is 28.8 FPS. The frame rate range at 4K is only 72 FPS, which is the tightest spread of any resolution.

How This Combo Ranks

This combination of Intel Core i9-14900K and AMD Radeon RX 7900 XT is ranked 386 out of 1800 tested combos in Roblox. That places it in the 78.6th percentile of all systems tested, meaning it outperforms roughly 1414 other combinations. The ranking is strong, but not top-tier, which is surprising given the hardware's caliber. The data suggests that Roblox is not particularly demanding on either component, and the frame rates achieved are likely limited by the game engine's threading model or draw call handling rather than raw hardware capability.

The GPU's percentile rank of 82 and the CPU's percentile rank of 97 do not translate into a top-100 combo ranking, which indicates that there are other combinations that achieve higher frame rates, possibly due to better memory configurations or platform optimizations. The measured FPS numbers are still exceptional, with even the lowest 4K Ultra result of 135.6 FPS being well above the refresh rate of most monitors. The rank reflects that while this is a very fast system, Roblox's performance ceiling is not solely determined by the core components.

FAQ

Q: What is the best resolution to play Roblox with this combo?

A: At 1080p Low, the system achieves 544.7 FPS, which is the highest measured average. However, even at 4K Ultra, the average is 135.6 FPS, so any resolution up to 4K is playable, with 1440p offering a strong balance of 362.2 FPS on Low and 234.5 FPS on Ultra.

Q: How much performance is lost when going from 1080p to 4K?

A: At Low settings, the drop from 1080p (544.7 FPS) to 4K (207.6 FPS) is a reduction of 337.1 FPS, or 61.9%. At Ultra settings, the drop is from 351.1 FPS to 135.6 FPS, a reduction of 215.5 FPS, or 61.4%.

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

A: The data indicates the GPU becomes the limiting factor at 4K, as the settings gap compresses from a 193.6 FPS difference at 1080p to a 72 FPS difference at 4K. At 1080p, the CPU is likely the primary driver, given the high frame rates.

Q: How does the RX 7900 XT compare to its nearest rivals in synthetic benchmarks?

A: The RX 7900 XT scores 29009 in Passmark G3D, which is within 0.4% of the NVIDIA GeForce MX570 and within 0.6% of the NVIDIA GeForce RTX 4080 Mobile. Its average benchmark score of 38358 puts it 0% ahead of the RTX 5080 Mobile.

Q: What is the CPU's performance percentile?

A: The Intel Core i9-14900K is in the 97th percentile of all CPUs, with an average benchmark score of 79824. Its nearest rival, the AMD EPYC 7413, scores 80041, which is 0.3% higher.

Q: What is the lowest frame rate recorded in the data?

A: The lowest average frame rate is 135.6 FPS, which occurs at 3840x2160 resolution with Ultra settings. This is still a comfortable frame rate for most displays.