Fortnite

The AMD Ryzen 7 7800X3D paired with the Intel Arc B390 presents a striking contrast in Fortnite, combining one of the most capable gaming CPUs with a GPU that benchmarks in the bottom tier of all tested graphics cards. The measured frame rates across resolutions and settings reveal a system that is heavily constrained by its graphics solution, with the CPU's considerable headroom remaining largely untapped as the Arc B390 struggles to maintain playable frame rates at higher loads.

Resolution Scaling

The data shows a dramatic and predictable decline in performance as resolution increases, but the rate of that decline tells a revealing story about where the bottleneck lies. At 1080p with Low settings, the combo achieves an average of 115 FPS, which drops to 73 FPS at 1440p and further to 39 FPS at 4K. This represents a 37% reduction from 1080p to 1440p and a further 47% reduction from 1440p to 4K, with the total drop from 1080p to 4K being approximately 66%.

These scaling patterns are classic indicators of a GPU-limited scenario. When a system is CPU-bound, resolution changes typically have minimal impact on frame rates because the processor is already maxed out. Here, the frame rate falls almost linearly with the increase in pixel count, suggesting the Intel Arc B390's rendering capabilities are the primary constraint. The 3DMark Steel Nomad DX12 score of 1482 places this GPU in the 9th percentile of all GPUs, with its nearest rivals being the NVIDIA GeForce GT 520MX and GeForce 800M, which are separated by only 1.3% and 1.5% respectively. This is not a GPU designed for high-resolution gaming, and the Fortnite results confirm this assessment.

The pattern holds when examining the High settings preset. At 1080p High, the average is 63 FPS; at 1440p High, it falls to 40 FPS; and at 4K High, it bottoms out at 21 FPS. The scaling from 1080p to 1440p shows a 37% decrease, identical to the Low preset's drop, while the 1440p to 4K decrease is 48%, also very similar. This consistency across presets reinforces that the GPU's raw throughput, not the settings configuration, is the limiting factor. The question becomes whether any settings adjustment can salvage a playable experience, and the data suggests that only the lowest resolution and settings combinations approach acceptable frame rates.

FAQ

Q: What is the best average frame rate this combo achieves in Fortnite?

A: The highest measured average FPS is 115, achieved at 1920x1080 resolution with Low settings. This is the only configuration in the entire measured dataset that exceeds the 100 FPS threshold.

Q: Can this system handle 4K gaming in Fortnite?

A: The data indicates no. At 4K, the average frame rates range from 14 FPS on Ultra settings to 39 FPS on Low settings. Even the best 4K result falls well below the 60 FPS standard for smooth gameplay, and the Medium preset at 4K shows an average of 27 FPS with a minimum of 23 FPS.

Q: How does the Arc B390 compare to its closest GPU rivals?

A: The Arc B390's average benchmark score is 1482, which is 1.3% higher than the NVIDIA GeForce GT 520MX's 1463, 1.5% higher than the GeForce 800M's 1460, and 2.5% higher than the GeForce GT 625 OEM's 1446. The closest competitor, the AMD Ryzen 9 PRO 6950H, is actually a CPU comparison, not a GPU rival.

Q: What is the difference between Low and Ultra settings at 1080p?

A: At 1920x1080, the Low preset averages 115 FPS, while the Ultra preset averages only 41 FPS. This represents a 64% reduction in average frame rate when moving from the lowest to the highest quality preset at the same resolution.

Q: Does the CPU's benchmark performance suggest it is a bottleneck?

A: No. The Ryzen 7 7800X3D has a percentile rank of 83 among all CPUs and an average benchmark score of 33079. Its nearest rivals, such as the AMD Ryzen 7 8700G and Intel Core i7-13650HX, have nearly identical average scores with 0% delta, indicating the CPU is performing as expected and is not the limiting factor in this combo.

Q: How many total combos does this setup rank against in Fortnite?

A: The combo ranks 2417 out of 2740 tested combinations in Fortnite, placing it in the bottom 12% of all tested systems for this game.

GPU Role

The Intel Arc B390 is the clear performance ceiling in this system. With a base clock of 300 MHz and a boost clock of 2500 MHz, the GPU's architecture is based on Xe3-LPG with a Panther Lake chip, manufactured on Intel's 3 nm process. The GPU features 1536 shading units, 48 texture mapping units, and 24 render output units, along with 12 ray tracing cores. Its compute capabilities are rated at 7.680 TFLOPS for FP32 and 15.36 TFLOPS for FP16, with a pixel rate of 60.00 GPixel/s and a texture rate of 120.0 GTexel/s.

What stands out immediately is the memory configuration: the Arc B390 uses "System Shared" memory, meaning it relies on the system's DDR5 RAM rather than dedicated VRAM. The memory bandwidth is listed as "System Dependent," which introduces a significant variable into performance. This shared memory architecture likely contributes to the GPU's poor showing in Fortnite, as the game's texture streaming and rendering demands can saturate available memory bandwidth. The GPU's 3DMark Steel Nomad DX12 score of 1482 places it at the 9th percentile of all GPUs, a remarkably low position that aligns with its nearest rivals being legacy NVIDIA parts like the GT 520MX and GT 710.

The performance data in Fortnite reflects this GPU's limitations. Even at the lowest resolution and settings, the system only manages 115 FPS average, which is respectable but not exceptional. The GPU's TDP is rated at 80 W, and it operates as an IGP (Integrated Graphics Processor), which explains the modest performance envelope. The fact that it has no dedicated power connectors and a slot width of "IGP" confirms this is an integrated solution, despite being branded as a separate Arc GPU. This makes the 115 FPS at 1080p Low a somewhat surprising result, hinting that the CPU's strength may be partially compensating for the GPU's weaknesses in less demanding scenarios.

Measured FPS Breakdown

The measured FPS data provides a comprehensive view of this combo's capabilities across twelve distinct configurations. At 1920x1080, the results range from 115 FPS average on Low settings to 41 FPS average on Ultra settings. The Medium preset at 1080p yields 81 FPS average, with a minimum of 69 FPS and a maximum of 93 FPS, while High settings produce 63 FPS average. This spread of 74 FPS between the lowest and highest quality presets at 1080p demonstrates how sensitive this system is to graphics settings changes.

Moving to 2560x1440, the average frame rates drop significantly. Low settings produce 73 FPS average, High settings produce 40 FPS, Medium settings produce 51 FPS with a minimum of 44 FPS and maximum of 59 FPS, and Ultra settings bottom out at 26 FPS average. The 1440p results show a consistent pattern of approximately 37% reduction from the corresponding 1080p settings, indicating that the GPU's pixel throughput is the dominant factor.

At 3840x2160, the performance becomes largely unplayable for competitive gaming. Low settings average 39 FPS, High settings average 21 FPS, Medium settings average 27 FPS with a minimum of 23 FPS and maximum of 31 FPS, and Ultra settings average just 14 FPS. The 4K Medium preset's minimum of 23 FPS and maximum of 31 FPS shows a narrow range, suggesting the GPU is consistently hitting its rendering limits rather than experiencing occasional spikes. The data clearly shows that 4K gaming is not viable with this combo, as even the best 4K result fails to reach 40 FPS average.

How This Combo Ranks

The combo rank of 2417 out of 2740 tested combinations places this system in the bottom 12% of all tested hardware pairings for Fortnite. This low ranking is unsurprising given the GPU's 9th percentile performance rating. The ranking suggests that the vast majority of tested systems outperform this setup in Fortnite, which is a competitive advantage in a game where higher frame rates provide a tangible gameplay benefit.

The contrast between the CPU and GPU rankings is stark. The Ryzen 7 7800X3D ranks in the 83rd percentile of all CPUs, putting it in the top 17% of processors, while the Arc B390 ranks in the 9th percentile of all GPUs, putting it in the bottom 9%. This creates an unusual pairing where a high-end CPU is matched with an entry-level GPU, resulting in a system that underperforms relative to what the CPU alone might suggest. The 2740 total combos tested means there are 323 combinations that rank below this setup, but the overwhelming majority of systems (2416) achieve better Fortnite performance.

The ranking also implies that the system's performance is almost entirely dictated by the GPU. If the CPU were the bottleneck, we would expect the combo to rank higher given the CPU's strong benchmark scores. Instead, the low ranking aligns with the GPU's poor relative performance, confirming that the Arc B390 is the primary determinant of this combo's position in the Fortnite hierarchy.

CPU Role

The AMD Ryzen 7 7800X3D is a formidable processor that is effectively wasted in this pairing. With 8 cores and 16 threads, a base clock of 4.20 GHz, and a boost clock of 5.00 GHz, this CPU offers substantial processing power. Its 96 MB of shared L3 cache is a defining feature, providing a large pool of fast memory for game data. The CPU's architecture is Zen 4, codenamed Raphael, built on a 5 nm process by TSMC with 11,270 million transistors on a 71 mm² die.

Benchmark results confirm the CPU's strength. The Cinebench R23 multicore score of 16817 and single-core score of 1713 indicate solid performance, while the Geekbench multicore score of 15610 and single-core score of 2426 further validate its capabilities. The 3DMark tests show scaling from 959 single-thread to 7980 for 16 threads, demonstrating good multi-threading efficiency. The CPU's average benchmark score of 33079 places it in the 83rd percentile, with its nearest rivals being the AMD Ryzen 7 8700G, Intel Core i7-13650HX, and AMD Ryzen 7 7745HX, all with 0% delta, and the AMD Ryzen 9 PRO 6950H with a -0.4% delta.

In Fortnite, the CPU's role appears to be largely supportive rather than limiting. The frame rates at 1080p Low (115 FPS) show that the CPU can feed frames at a reasonable rate, but the GPU cannot sustain higher output. The fact that frame rates drop so dramatically with resolution increases suggests the CPU has plenty of headroom left. If the CPU were the bottleneck, we would expect similar frame rates across resolutions, which is clearly not the case. The CPU's 120 W TDP and support for DDR5 memory with 83.2 GB/s bandwidth provide a solid foundation, but the system's shared memory architecture for the GPU may be creating additional latency that further constrains performance.

Settings Recommendations

Based on the measured data, the optimal settings for this combo depend heavily on the user's priorities. For competitive play where frame rate is paramount, the 1080p Low preset at 115 FPS average is the clear choice. This configuration provides the smoothest experience and comes closest to high-refresh-rate gaming standards. The 1440p Low preset at 73 FPS average is a viable alternative for users who prioritize resolution over maximum frame rate, but it represents a 37% reduction in performance.

For users seeking a balance between visual quality and performance, the 1080p Medium preset at 81 FPS average with a minimum of 69 FPS is the most reasonable middle ground. The minimum frame rate of 69 FPS indicates that the system can maintain playable performance even during demanding scenes. The 1080p High preset at 63 FPS average is borderline playable but may exhibit noticeable dips during intense combat. The 1440p Medium preset at 51 FPS average is playable but may feel less responsive, and the 4K Medium preset at 27 FPS average is not recommended for any gameplay scenario.

The Ultra presets are uniformly poor across all resolutions. At 1080p Ultra, the average of 41 FPS is below the threshold for smooth gameplay, and at 1440p Ultra, the 26 FPS average is barely interactive. The 4K Ultra result of 14 FPS average is effectively unplayable. The data suggests that users should avoid Ultra settings entirely with this combo, as the visual improvements do not justify the substantial frame rate penalties. The best experience per the measured rows is achieved at 1080p with either Low settings for maximum frame rate or Medium settings for a balance of quality and performance.