Roblox

The AMD Ryzen 7 5800XT and NVIDIA GeForce RTX 4070 combination delivers exceptionally high frame rates in Roblox, a Sandbox game from 2006. Measured average FPS ranges from 124 at 4K Ultra to 503 at 1080p Low, with the system staying fluid even at the most demanding settings tested. The following breakdown examines how this pairing scales across resolutions and presets, which component drives performance, and what the measured data suggests for players optimizing this setup.

Resolution Scaling

The measured FPS results show a clear pattern: as resolution increases, frame rates drop sharply, but even at 4K the system holds high averages. At 1080p, switching from Low to High drops average FPS from 503 to 404 — an 96 FPS gap. Medium sits between at 457, while Ultra delivers 328. Move to 1440p and the same pattern repeats: Low shows 335 FPS, Medium 305, High 270, and Ultra 219. At 4K, the averages fall to 190 (Low), 173 (Medium), 153 (High), and 124 (Ultra).

The drop between 1080p Low (503 FPS) and 4K Low (190 FPS) represents a 62% reduction — a massive scaling penalty. Conversely, 1080p Ultra to 4K Ultra goes from 328 to 124, a 71% decline. These figures indicate that the GPU becomes the primary limiter as pixel count rises, which is expected given the increasing pixel workload. However, the absolute numbers remain high: even the worst tested scenario, 4K Ultra at 124 FPS, is far above typical 60 Hz display rates. The scaling from 1440p to 4K is steeper than from 1080p to 1440p — for example, High drops from 270 to 153 (45% loss) across that step, whereas 1080p to 1440p drops 404 to 270 (34% loss). This pattern suggests that the RTX 4070’s rendering pipeline becomes saturated in the 1440p–4K transition, aligning with its mid-high tier position.

The presence of min and max FPS data only for Medium settings adds context. At 1080p Medium, the min is 389 and max 526, yielding a range of 137. At 1440p Medium, min 259 and max 351 (range 92), and at 4K Medium, min 147 and max 199 (range 52). The diminishing range with higher resolution points to a more consistent frame time at heavy loads — all within the GPU’s boundaries. Low and High settings lack min/max data, so the measured averages bracket the likely performance envelope.

CPU Role

The Ryzen 7 5800XT is an 8-core, 16-thread processor based on the Zen 3 "Vermeer" architecture, fabricated on a 7 nm TSMC process. Base clock is 3.80 GHz, boost clock 4.80 GHz, with 64 KB L1 per core, 512 KB L2 per core, and a 32 MB shared L3 cache. It supports DDR4 dual-channel memory with 51.2 GB/s bandwidth and interfaces via PCIe Gen 4. In synthetic tests, the multi-threaded scores stand out: 23,794 in Cinebench R23 multi-core, 9,993 in R20, and 3,518 in 3DMark 16-thread. Single-thread scores are also strong—3,255 in Passmark single-thread and 338 in Cinebench R15.

These benchmark scores align with the CPU's overall percentile of 81 (better than 81% of all CPUs). Its nearest rivals in the database are within a tight band: the AMD Ryzen 7 7840H at 29,868 average score (delta 0%), the Ryzen 7 8845HS at 29,955 (-0.3%), the Ryzen 7 7840HS at 29,955 (-0.3%), and the Ryzen 5 9600X at 29,713 (+0.6%). The 5800XT places just 0.6% above the 9600X, indicating that its multi-thread performance is comparable to some modern CPUs, but not dramatically superior.

In Roblox, the CPU’s 8-core, 16-thread setup is likely more than sufficient, as the game is not a modern AAA title with heavy physics. The high single-thread metrics (e.g., 3,335 in Cinebench R23 single-core) support this. Yet the measured frame rates at 1080p Ultra still hit 328 FPS, suggesting the CPU is not the bottleneck even at low resolutions. The gap between Low (503) and Ultra (328) is a modest 175 FPS — likely due to workload scaling, but the CPU's headroom means it does not cap the frame rate below these numbers.

A point of curiosity: while the CPU launches at a listed MSRP of $249, the focus here remains on technical results. The CPU's 84 MB total cache (combined) and 74 mm² die size show it is a compact design. The measured data—particularly the flat 1080p to 1440p scaling (e.g., 503 vs 335) — indicates the CPU manages to feed the GPU adequately without becoming the limiting factor, as frame rates track the resolution scaling rather than flattening early.

GPU Role

The NVIDIA GeForce RTX 4070 uses the AD104 chip based on the Ada Lovelace architecture, built on a 5 nm process from TSMC. It packs 5,888 shading units, 184 texture units, and 64 ROPs, with 46 RT cores and 184 tensor cores. Memory is 12 GB of GDDR6X over a 192-bit bus, providing 504.2 GB/s of bandwidth. The GPU’s boost clock is listed at 2475 MHz, base 1920 MHz, and memory speed at 21 Gbps effective. Its FP32 compute is 29.15 TFLOPS, with pixel rate of 158.4 GPixel/s.

These numbers translate to a GPU that ranks in the 81st percentile. Its average benchmark score is 37,648, and its nearest rivals include the NVIDIA Tesla P4 (delta 0.1%), AMD Radeon RX Vega 56 (delta 0.4%), NVIDIA GeForce RTX 4080 Mobile (delta -1.3%), and AMD Radeon PRO W6400 (delta 1.3%). To be within 1.3% of the RTX 4080 Mobile and 6% above the RX 5700 XT (not listed) shows the 4070 sits near the top tier for raw compute. The memory bus width of 192-bit is moderate, but 12 GB of VRAM is generous.

In Roblox, GPU role becomes apparent at high resolutions. The 4K numbers—190 at Low, 173 at Medium, 153 at High, 124 at Ultra—demonstrate a clear progression: an average drop of roughly 20-30% per setting tier at 4K. At 1080p, the differences are smaller in absolute terms but proportionally similar (Low 503 vs Ultra 328, a 48% deficit). This indicates that the GPU's vertex processing and fill rate, given its 64 ROPs and 22 texture units (but actually 184 TMUs), are the primary constraints at higher loads.

The VRAM size of 12 GB is relevant for Roblox's asset loading. Even at 4K Ultra with textures at max, the game likely doesn't exceed this capacity, as the FPS remains high. The 504.2 GB/s bandwidth provides ample for the game’s draw calls. The lack of min/max FPS data for most settings suggests stable performance; noted one medium setting has a max of 526 FPS at 1080p, which is far from the GPU's theoretical limit. The GPU's 200 W TDP is notable through the PSU recommendation of 550 W.

The GPU's row in the measured data shows that the limiting factor at 1080p is not the GPU itself, as the 503 FPS at Low is far from the passmark G3D score of 26,927. However, the steep scaling from 1440p to 4K (e.g., High from 270 to 153, also 44% drop) suggests the GPU's memory bus and compute units are saturated as the frame size grows. The turning point appears to occur around 1440p, where the system transitions from CPU-bound to GPU-bound.

FAQ

Q: What is the highest FPS that can be achieved consistently at 4K?

A: The measured 4K Medium average is 199 FPS, but the minimum is 147 FPS, so the typical FPS is up to 199.

Q: Does the system maintain 60 FPS at 4K Ultra?

A: Yes, the measured 4K Ultra avg is 124 FPS, which is 2x that requirement. Even the lowest minimum value recorded across all tests is 147 FPS at 4K Medium.

Q: Is the CPU or GPU more responsible for the frame rate at 1440p?

A: The drop from 1080p to 1440p averages about 30% (e.g., from 404 to 270 High), while the 1440p to 4K drop is about 50%. This suggests that the GPU becomes the limiting factor as pixel count increases, while the CPU is sufficient.

Q: What setting provides the best resolution/settings ratio?

A: Based on averages, 1080p Ultra (328) is a 44% decrease from 1080p Low (503) — a severe degrade. The gap is smaller at 1440p: Ultra is 335 vs. Low 219, a 22% reduction. The measured data suggests 1440p High, which is 270 FPS, offers a balance.

Q: Which CPU does the Ryzen 7 5800XT exceed in multi-threaded performance?

A: It's within 0.6% of the AMD Ryzen 5 9600X, and behind the two mobile variants by 0.3%, but it details the similar results.

Q: What is the most consistent frame rate experience?

A: The 4K Medium setting shows the narrow min/max spread (147 to 199), while the 1080p Medium has a larger spread (185 to 526) — the higher resolution provides a tighter range.

How This Combo Ranks

The measured frame rates place this combination at rank 866 out of 3,711 tested combos for Roblox. This rank positions the setup in the top 24% (866/3711 = 23.3%). The 3,711 total combos span a broad range of CPUs and GPUs, so being in the 866th percentile is competitive. In practice, this means the vast majority of systems tested produce lower average FPS, though a long tail of more powerful hardware exists.

The ranking is a direct result of the combo's position between the CPU and GPU percentile bounds. The CPU at 81st percentile and GPU at 81st percentile are both strong, leading to a combined assembly in the upper quarter. Given that Roblox is a lightweight game, the high rank is probably conservative; the frame rates are limited by the CPU's single-thread performance rather than GPU, but the data shows the CPU scores are keeping pace. The delta repulsion relative to rivals is minor—the CPU is within 0.6% of nearest list, so performance is characteristic of mid-to-high-range desktop parts.

The rank also reflects the insensitivity of Roblox to extremely high core counts. Many higher-tier CPUs might rank higher in heavy games, but here the CPU's 16 threads are allocated to the game's physics and world update. The measured FPS numbers, when considered against the rank, advise that the combination yields a consistently high experience across any title—more so in this game because of its open-ended draw distance.

Settings Recommendations

Based on the measured rows, the sweet spot for this setup leans toward 1440p High or 1080p Ultra, depending on the display's refresh rate. At 1440p High, the average is 270 FPS, which exceeds the 240 Hz refresh rate of most gaming monitors. For a 1,440p display, High uses the extra parametrization while giving a 10% drop from Low (335 FPS). Ultra drops to 219 FPS—a 12% reduction from High but still very high.

At 4K, the choices become clearer. 4K High averages 153 FPS, which is adequate for any 120 Hz 4K screen. Medium delivers 173 FPS and a 199 FPS max but with a 147 min, indicating some frame time variability. Ultra at 124 FPS is playable but 17% slower than High. The data shows that High at 4K is the upper limit for a smooth experience; Ultra would only be recommended for a VRR display—or players having a 60 Hz screen, since 124 FPS will be unused.

The presence of min/max frames for Medium settings (at all resolutions) suggests the game's micro-stutter are minimized at Medium. Yet the absolute FPS at High are close (2-3% lower than medium at 1440p and 11% lower at 4K). For the best experience without sacrificing image quality, 1440p High is the recommended preset—it yields a balance of resolution, FPS, and visual fidelity, with no risk of drops below 220 FPS. For 4K, High is the clear choice given the min-fps not being in the data, but the average 153 FPS leaves a safe margin.

Measured FPS Breakdown

• 1920x1080:
• Low: 503 avg
• Medium: 457 avg, min 389, max 526
• High: 404 avg
• Ultra: 328 avg

• 2560x1440:
• Low: 335 avg
• Medium: 305 avg, min 259, max 351
• High: 270 avg
• Ultra: 219 avg

• 3840x2160:
• Low: 190 avg
• Medium: 173 avg, min 147, max 199
• High: 153 avg
• Ultra: 124 avg

These numbers confirm the scaling patterns: 1080p to 1440p gets a 28-32% decline, and 1440p to 4K about 50% decline across settings. The medium setting consistently offers the most stable frames, with min values that are within 15-20% of the average. The average FPS at every point is higher than any typical 144 Hz threshold, indicating that this combination provides an extra strong experience regardless of resolution. The only scenario where a drop below 144 FPS occurs is 4K Ultra at 124 FPS, which hedgically still acceptable. For players pursuing the highest fidelity, 4K High at 153 FPS, those nadir numbers are not logged, but the average is safer. Hence, the recommendation script is to use Medium at 4K only for a beneficial frame-rate margin, or High for a balanced experience.