Roblox

The AMD Ryzen 9 9900X paired with the Intel Arc B580 is a decidedly unbalanced combination on paper — a flagship-tier twelve-core Zen 5 desktop CPU sitting in the 92nd percentile of all tested processors, mated to a mid-range Battlemage GPU in the 68th percentile — but for Roblox, that imbalance is irrelevant. Measured benchmark results indicate the pair clears the 60 FPS playable threshold at every tested resolution, including 4K Ultra at 73.6 average FPS. The data below breaks down where that performance comes from, which alternative hardware behaves similarly, and how this combo ranks against the other configurations tested in this sandbox title.

Similar Performance Alternatives

On the CPU side, the Ryzen 9 9900X's average benchmark score of 57498 places it in a tight cluster of rivals. The AMD EPYC 9015 scores 57555 on average, a delta of just -0.1 percent — effectively identical aggregate throughput. The AMD EPYC 7313 sits at 57399, only 0.2 percent behind. Moving to Intel territory, the Core i9-14900 averages 58115, about 1.1 percent ahead, and the Xeon Platinum 8260M leads by 1.4 percent at 58323. Any of these processors would deliver broadly comparable CPU-side behavior; in a lightly threaded sandbox game like Roblox, the differences within this cluster are noise. The single-thread numbers matter more here, and the 9900X's Geekbench single-core score of 3010 alongside its Cinebench R23 single-core result of 2253 reflect the strong per-core throughput of the Zen 5 architecture at a 5.60 GHz boost clock.

On the GPU side, the Arc B580's average score of 23021 has its own near-neighbors. The AMD Radeon RX 580 2048SP averages 23061 — a delta of -0.2 percent, essentially a tie. The NVIDIA GeForce RTX 2080 sits at 22895, 0.6 percent behind the B580, while the RTX 3080 is marginally ahead at 23172, a -0.7 percent delta from the B580's perspective. The NVIDIA P106-100 rounds out the group at 23249, one percent ahead. Anyone running the RTX 2080 or RX 580 2048SP should expect Roblox frame rates within a rounding error of the B580's results in this dataset. The B580's PassMark G3D score of 15748 and Vulkan compute result of 109672 in Geekbench characterize its raw rendering and compute capability.

Best Settings per Resolution

The playable threshold for this dataset is 60 FPS, and the measured results make preset selection straightforward — because every preset clears it everywhere.

• 1920x1080: Ultra is the best setting, averaging 195 FPS. Even the minimum recorded preset at this resolution, Ultra, is more than three times the threshold.
• 2560x1440: Ultra again, at 128.9 FPS average — comfortably above 60.
• 3840x2160: Ultra remains viable at 73.6 FPS average, the closest any configuration comes to the threshold but still clear of it by a double-digit margin.

In short, there is no settings compromise to make. Ultra is the answer at all three resolutions, and the verdict data confirms all four presets — Low, Medium, High, Ultra — are playable at every resolution tested.

CPU and GPU Roles

The scaling data tells a clear story about which component governs performance. Dropping from 1080p Ultra to 4K Ultra takes the average from 195 FPS to 73.6 FPS — a reduction of roughly 62 percent as pixel count quadruples. That steep, resolution-driven decline indicates the GPU is the binding constraint at higher resolutions; the Arc B580 is being asked to render four times the pixels and frame rate falls accordingly.

At 1080p, the picture inverts. The spread between Low (296.4 FPS) and Ultra (195 FPS) at 1080p is wide, but the fact that even the most demanding preset holds near 200 FPS means the Ryzen 9 9900X is never the limiting factor — a CPU bottleneck would cap frame rates regardless of preset, and no such ceiling appears. The 9900X's single-thread strength (PassMark single-thread score of 4672, Geekbench single-core 3010) provides ample headroom for Roblox's workload. Preset scaling is consistent at every resolution: at 4K, Low yields 112.6 FPS versus Ultra's 73.6; at 1440p, Low yields 196.8 versus Ultra's 128.9. The proportional drop from Low to Ultra is similar across resolutions, further confirming that shader and detail load — a GPU-side cost — drives the preset-to-preset differences rather than CPU throughput.

The Verdict

Yes — this PC runs Roblox without qualification. The verdict-by-resolution data shows all four presets playable at all three tested resolutions. At 1920x1080, Ultra averages 195 FPS. At 2560x1440, Ultra averages 128.9 FPS. At 3840x2160, Ultra averages 73.6 FPS, the tightest margin but still comfortably above the 60 FPS threshold. A player on this hardware should simply set Ultra and play, at any resolution up to and including 4K.

Measured FPS Breakdown

All figures below are measured average FPS; minimum and maximum frame rates were not recorded in this dataset.

3840x2160 (4K)

• Low: 112.6 avg FPS
• Medium: 102.8 avg FPS
• High: 89.7 avg FPS
• Ultra: 73.6 avg FPS

2560x1440 (1440p)

• Low: 196.8 avg FPS
• Medium: 181.2 avg FPS
• High: 160.8 avg FPS
• Ultra: 128.9 avg FPS

1920x1080 (1080p)

• Low: 296.4 avg FPS
• Medium: 269.6 avg FPS
• High: 237.9 avg FPS
• Ultra: 195 avg FPS

The gradient is orderly: each step up in preset costs frame rate monotonically at every resolution, and each step up in resolution does the same. The largest single jump comes from moving 1080p to 4K — Ultra loses 121.4 FPS across that span — while the preset ladder within a resolution is comparatively gentle, never exceeding a 34.4 FPS drop between adjacent tiers at 4K (Medium to High).

How This Combo Ranks

Within the Roblox benchmark database, this pairing ranks 2776 out of 3711 tested combinations. That places it in the bottom third of tested configs for this specific game — a reflection of Roblox's modest demands rather than weak hardware, since the same combo clears 4K Ultra at 73.6 FPS. The ranking implies that thousands of cheaper or older combinations also deliver 60-plus FPS in Roblox, which is consistent with the game's origins as a 2006 sandbox platform. For this title specifically, the 9900X's 12 cores, 24 threads, and 64 MB of L3 cache, plus the B580's 12 GB of GDDR6 across a 192-bit bus with 456 GB/s of bandwidth, are dramatically more than the engine requires.

FAQ

Q: Can the Ryzen 9 9900X and Arc B580 run Roblox at 4K Ultra?

A: Yes. The combo averages 73.6 FPS at 3840x2160 Ultra, above the 60 FPS playable threshold.

Q: What is the highest frame rate recorded for this combo in Roblox?

A: 296.4 average FPS, at 1920x1080 on the Low preset.

Q: Which presets are playable at 1440p?

A: All of them — Low, Medium, High, and Ultra. Ultra averages 128.9 FPS at 2560x1440.

Q: Is the CPU or GPU the bottleneck in this game?

A: The GPU. Frame rate falls sharply as resolution rises (195 FPS at 1080p Ultra versus 73.6 at 4K Ultra), while the 9900X shows no sign of capping performance even at 296.4 FPS on Low at 1080p.

Q: What GPUs would perform similarly to the Arc B580 in this dataset?

A: The Radeon RX 580 2048SP (-0.2 percent), GeForce RTX 2080 (0.6 percent), GeForce RTX 3080 (-0.7 percent), and P106-100 (-1 percent) all sit within one percent of the B580's average benchmark score.

Q: How does this combo rank against other tested pairings in Roblox?

A: It ranks 2776 of 3711 tested combinations — bottom-third for this game despite comfortably clearing the playable threshold at every resolution and preset.