Fortnite

Fortnite pairs the AMD Ryzen 7 5800XT with the Intel Arc B390, a combination that lands near the bottom of the benchmark database for this title. The CPU is a strong desktop part, but the integrated graphics solution severely limits playable frame rates, particularly at higher resolutions and settings. Measured data shows a system that can approach playability only at 1080p with Low settings, while everything else falls well below the thresholds expected for a competitive battle royale.

FAQ

Q: What is the measured average frame rate at 1920x1080 with Low settings?

A: The data shows an average of 115 FPS at 1920x1080 with Low settings. This is the only configuration in the measured results that exceeds 100 FPS, and it represents the peak performance for this CPU and GPU combo in Fortnite.

Q: How does the Intel Arc B390 compare to its nearest rivals in synthetic benchmarks?

A: The Arc B390’s average benchmark score of 1482 places it just ahead of the NVIDIA GeForce GT 520MX, which scores 1463 (a 1.3% delta). It is also 1.5% ahead of the GeForce 800M (1460), 2.5% ahead of the GT 625 OEM (1446), and 2.7% ahead of the GT 710 (1443). These are all very low-end parts, and the performance gaps are minimal.

Q: What is the combo’s rank among all tested CPU and GPU pairings for Fortnite?

A: The Ryzen 7 5800XT and Arc B390 combination ranks 2417 out of 2740 tested combos in Fortnite. This places it in the bottom 12% of all configurations in the database, indicating that the GPU is a major bottleneck for this game.

Q: What is the difference in average FPS between 1080p Low and 4K Low?

A: At 1920x1080 Low, the average FPS is 115, while at 3840x2160 Low, the average FPS drops to 39. This represents a 66% reduction in frame rate when moving from 1080p to 4K, demonstrating that the integrated GPU is overwhelmed by the pixel count at higher resolutions.

Q: Does the Intel Arc B390 have its own dedicated VRAM?

A: No. The Arc B390 uses "System Shared" memory for both its memory size and type. Its memory bandwidth is described as "System Dependent," meaning it relies on the system’s main memory, which in this case is DDR4 dual-channel running at 51.2 GB/s, shared with the CPU.

Q: What is the CPU’s percentile ranking among all processors?

A: The AMD Ryzen 7 5800XT scores in the 81st percentile of all CPUs in the database. This shows that the processor itself is a strong performer, but it is being held back significantly by the integrated graphics solution in this Fortnite configuration.

GPU Role

The Intel Arc B390 is the decisive factor in this system’s Fortnite performance, and its specifications explain why the measured results are so low. The GPU is an integrated part based on the Panther Lake chip, using the Xe3-LPG architecture built on Intel’s 3 nm process. It has 1536 shading units, 48 texture mapping units, and 24 raster output pipelines, along with 12 ray tracing cores. Its boost clock reaches 2500 MHz, with a base clock of 300 MHz. The theoretical pixel rate is 60.00 GPixel/s, and the texture rate is 120.0 GTexel/s, with FP32 performance rated at 7.680 TFLOPS.

However, the most critical limitations are in its memory subsystem. The Arc B390 has no dedicated VRAM; instead, it uses "System Shared" memory, meaning it must borrow from the system’s DDR4 memory. The memory bus width is also "System Shared," and bandwidth is listed as "System Dependent." In this configuration, the CPU’s dual-channel DDR4 provides 51.2 GB/s of bandwidth, a figure that is shared between the CPU and the iGPU. This shared bandwidth is a severe constraint for a modern game like Fortnite, which requires frequent texture streaming and frame buffer updates.

The data confirms this bottleneck. At 3840x2160 with Ultra settings, the average FPS is just 14, which is unplayable. Even at 1080p with Low settings, the average FPS reaches 115, but this is the only playable result. The GPU’s 3DMark Steel Nomad DX12 score of 1482 places it in the 9th percentile of all GPUs, and its nearest rivals are all legacy NVIDIA parts like the GT 520MX and GT 710. These are not modern gaming GPUs, and the Arc B390’s performance aligns with that tier. The GPU’s TDP is just 80 W, and it has no power connectors since it is an integrated part, further confirming its low-end positioning.

How This Combo Ranks

The combination of the Ryzen 7 5800XT and the Arc B390 ranks 2417 out of 2740 tested combos in Fortnite. This places it in the bottom 11.8% of all configurations, a poor showing that underscores the mismatch between the capable CPU and the weak iGPU. The rank is driven almost entirely by the GPU’s performance, as the CPU is a high-end desktop processor.

To contextualize the CPU’s contribution, the Ryzen 7 5800XT sits in the 81st percentile of all CPUs. Its average benchmark score is 29879, and its nearest rivals include the AMD Ryzen 7 7840H (29868), the Ryzen 7 8845HS (29955), the Ryzen 7 7840HS (29955), and the Ryzen 5 9600X (29713). The delta percentages are tiny, ranging from 0% to 0.6%, meaning the 5800XT is statistically tied with these parts in synthetic CPU tests. In contrast, the Arc B390’s average GPU score of 1482 is in the 9th percentile, with its nearest rivals (GT 520MX, 800M, GT 625 OEM, GT 710) all scoring between 1443 and 1463. The GPU is clearly the weak link, and the combo rank reflects this: a high-percentile CPU paired with a low-percentile GPU yields a bottom-tier result for Fortnite.

The data also shows that the combo rank is specific to Fortnite. While the CPU might excel in other workloads, the game’s reliance on GPU throughput for rendering means the Arc B390 drags the entire system down. The rank of 2417 out of 2740 means that over 88% of tested combos perform better, which is a stark indicator of the GPU’s limitation.

Measured FPS Breakdown

The measured FPS data provides a clear picture of performance across three resolutions and four settings levels. All results are average FPS unless otherwise noted, with some entries including minimum and maximum FPS.

At 1920x1080, the results are as follows:

• Low: 115 average FPS. This is the best result in the entire dataset and the only one above 100 FPS.
• Medium: 81 average FPS, with a minimum of 69 and a maximum of 93.
• High: 63 average FPS.
• Ultra: 41 average FPS.

At 2560x1440, the performance drops significantly:

• Low: 73 average FPS.
• Medium: 51 average FPS, with a minimum of 44 and a maximum of 59.
• High: 40 average FPS.
• Ultra: 26 average FPS.

At 3840x2160, the results are largely unplayable:

• Low: 39 average FPS.
• Medium: 27 average FPS, with a minimum of 23 and a maximum of 31.
• High: 21 average FPS.
• Ultra: 14 average FPS.

The pattern is consistent: each step up in settings reduces the average FPS by roughly 25-35%, and each step up in resolution reduces it by roughly 40-50%. For example, at 1080p, moving from Low to Medium costs 34 FPS (115 to 81), from Medium to High costs 18 FPS (81 to 63), and from High to Ultra costs 22 FPS (63 to 41). At 4K, the same progression from Low to Ultra goes from 39 to 14 FPS, a drop of 25 FPS. The minimum FPS figures, where available, show that frame pacing is also a concern; at 1080p Medium, the minimum is 69 FPS, which is close to the average of 81, indicating some stutter. At 1440p Medium, the minimum is 44 FPS, and at 4K Medium, it is 23 FPS, both of which are below the average by a similar margin.

For a competitive title like Fortnite, the playable threshold is generally considered to be above 60 FPS. The data shows that this combo only achieves that at 1080p Low (115 FPS) and 1080p Medium (81 FPS). At 1440p Low, it hits 73 FPS, which is borderline. Everything else falls below 60 FPS, with 4K results ranging from 14 to 39 FPS, making the game effectively unplayable at that resolution.

Resolution Scaling

The resolution scaling behavior reveals the extent to which the Arc B390 is the limiting component. Comparing 1080p Low to 4K Low, the average FPS drops from 115 to 39, a reduction of 66%. This is a massive penalty for resolution scaling, indicating that the GPU’s fill rate and memory bandwidth are completely overwhelmed by the increase in pixel count.

Looking at the full progression for Low settings:

• 1920x1080: 115 FPS
• 2560x1440: 73 FPS
• 3840x2160: 39 FPS

The drop from 1080p to 1440p is 36.5% (115 to 73), and from 1440p to 4K is 46.6% (73 to 39). An ideal scaling would show a roughly linear relationship with pixel count; 1440p has 1.78 times the pixels of 1080p, so a perfectly scaling GPU would produce around 64 FPS (115/1.78). The measured 73 FPS is actually better than that, suggesting the CPU is still providing some headroom. However, 4K has 2.25 times the pixels of 1440p, and a perfect scaling from 73 FPS would yield 32 FPS. The measured 39 FPS is slightly better, but still very low.

For Medium settings, the progression is 81 FPS at 1080p, 51 FPS at 1440p, and 27 FPS at 4K. The drop from 1080p to 1440p is 37%, and from 1440p to 4K is 47%. This is consistent with the Low settings pattern, showing that the GPU is the bottleneck regardless of settings. The fact that the percentage drops are similar across settings suggests that the integrated GPU’s memory bandwidth is the primary constraint, as higher resolutions require more memory traffic per frame.

The high resolution results reinforce this. At 4K Ultra, the average FPS is 14, which is a 65% drop from 1080p Ultra (41 FPS). The scaling from 1440p Ultra (26 FPS) to 4K Ultra (14 FPS) is a 46% drop. These consistent percentages across all settings levels indicate that the limiting component is the GPU’s ability to process pixels, not the CPU or system memory. The CPU has 8 cores and 16 threads running at up to 4.80 GHz, which is more than sufficient for Fortnite’s engine, but the Arc B390 simply cannot keep up with the rendering demands.

CPU Role

The AMD Ryzen 7 5800XT is a desktop processor from the 5000 series, based on the Zen 3 architecture (codename Vermeer) built on TSMC’s 7 nm process. It has 8 cores and 16 threads, with a base clock of 3.80 GHz and a boost clock of 4.80 GHz. The cache hierarchy includes 64 KB of L1 per core, 512 KB of L2 per core, and 32 MB of shared L3 cache. It supports DDR4 memory in dual-channel configuration, providing 51.2 GB/s of bandwidth, and features PCIe Gen 4 with 20 lanes. The TDP is 105 W, and it was released in 2024 with a launch MSRP of $249.

In synthetic benchmarks, the 5800XT shows strong multi-threaded performance. Its Cinebench R23 multi-core score is 23794, and its single-core score is 3359. The 3DMark 16-thread score is 7683, while the max-thread score is 7680. PassMark multi-thread score is 28053, and single-thread is 3535. These scores place the CPU in the 81st percentile of all processors, with an average benchmark score of 29879. Its nearest rivals are all mobile or newer desktop parts, with delta percentages under 1%, indicating the 5800XT is competitive with the Ryzen 7 7840H, 8845HS, 7840HS, and Ryzen 5 9600X.

For Fortnite, the CPU’s role is to handle game logic, physics, and draw calls. With 8 cores and 16 threads, the 5800XT is more than capable of feeding frames to the GPU. The data shows that at 1080p Low, the system achieves 115 FPS, which is likely CPU-limited at that point, but the GPU still manages to keep up. However, at higher resolutions and settings, the GPU becomes the bottleneck. The fact that the CPU scores in the 81st percentile while the combo ranks in the bottom 12% for Fortnite confirms that the GPU is the limiting factor.

The CPU’s memory bandwidth of 51.2 GB/s is shared with the Arc B390’s "System Shared" memory. This is a critical interaction, as the iGPU must compete with the CPU for memory access. In Fortnite, which is memory-intensive, this shared bandwidth likely causes stuttering and frame drops, as seen in the minimum FPS figures. At 1080p Medium, the minimum FPS is 69, which is 15% below the average of 81, suggesting memory contention. At 1440p Medium, the minimum is 44 (14% below the 51 average), and at 4K Medium, the minimum is 23 (15% below the 27 average). This consistent pattern points to the system memory bandwidth as a secondary bottleneck, even though the GPU’s raw compute is the primary constraint.

The CPU’s boost clock of 4.80 GHz and 32 MB of L3 cache help maintain consistent frame delivery in CPU-bound scenarios, but Fortnite’s rendering load is too heavy for the Arc B390. The measured data shows that the system is only viable at 1080p Low, where the 115 FPS average is playable but not stellar. At any other configuration, the frame rate drops below competitive thresholds, making this combo a poor choice for Fortnite despite the strong CPU. The Ryzen 7 5800XT is a capable processor, but it is wasted in this pairing, as the integrated GPU cannot translate its performance into playable frame rates.