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Assassin's Creed Black Flag Resynced GPU Benchmarks: Radeon Dominance and VRAM Bottlenecks at 4K
The Return of Piracy: A Modern Engine Revisited
Ubisoft has officially brought Edward Kenway’s Caribbean adventure back into the spotlight with Assassin's Creed Black Flag Resynced. This is not merely a visual refresh; it represents a complete rebuild of the 2013 classic using Ubisoft’s latest Anvil game engine. The result is a title that demands significantly more from modern PC hardware than its predecessor ever did, featuring heavily updated character models, overhauled environments, and advanced graphical features including ray tracing.
To understand just how demanding this renewed voyage is for your system, extensive testing was conducted across fifty different graphics cards. By utilizing the game’s built-in benchmark tool, performance data was gathered at 1080p, 1440p, and 4K resolutions with various quality presets and ray tracing modes enabled. The goal was to determine where current hardware stands, whether you are sailing on a budget or pushing flagship silicon to its limits.
Ray Tracing and Rendering Technologies
The remaster introduces substantial visual enhancements that directly impact performance. A key addition is the support for both hardware-accelerated and software-based ray tracing solutions. For cards lacking dedicated RT cores, the game offers simulated advanced lighting, though this comes with caveats regarding final image quality compared to native implementations.
When enabling ray tracing, users can choose between two distinct modes:
- Standard: Enables ray-traced global illumination. This replaces original baked-in lighting with real-time precomputed diffuse indirect lighting, eliminating light bleed and creating more realistic shadowing.
- Extended: The highest quality mode, which adds ray-traced reflections to simulate accurate indirect specular lighting, replacing traditional screen space reflections.
Beyond lighting, the game leverages micro-polygon virtual geometry, physically based rendering (PBR), advanced shaders, and a dynamic weather system. Perhaps most notably, the ocean has been completely rebuilt with advanced foam simulation, improved light scattering, and reworked water physics to make sailing feel dynamic rather than static.
Upscaling technologies play a crucial role in maintaining frame rates across these modern features. NVIDIA GPUs utilize DLSS 4.5 and Multi-Frame Generation, AMD offers FSR 4.1/ML Upscaling with Frame Generation, and Intel Arc cards support XeSS 3 and its corresponding upscaling methods.
Performance at Native Resolutions
The benchmark results reveal a distinct trend: Radeon GPUs generally outperform their NVIDIA counterparts in this specific title, even when comparing current-generation hardware against previous generations of competitors. This favoritism toward AMD’s architecture is consistent across multiple resolution tiers and quality settings.
At 1080p with Ultra High presets and Extended Ray Tracing enabled, the RTX 5090 leads the pack at approximately 119 FPS, making it roughly 25% faster than the previous-gen RTX 4090. However, the performance gap between generations is surprisingly narrow in many areas. The RTX 5080 was only marginally faster (around 5%) than the RTX 4080, and NVIDIA’s latest Blackwell architecture does not show a massive generational uplift over Ada Lovelace in this engine.
A standout performer from AMD is the previous-generation flagship RX 7900 XTX. In several tests, it performed above expectations, beating both the current-gen RTX 5080 and the newer RTX 9070 XT. The mid-range RX 970 series also showed strong results; the standard RX 970 was notably faster than the RTX 5070 Ti in some configurations, representing a massive performance delta over the base RTX 5070 model.
The VRAM Bottleneck
One of the most critical findings from this testing is the severe impact of video memory capacity. At high settings and resolutions, 8 GB of VRAM becomes a significant liability. For instance, at 1440p with maximum ray tracing, the RX 960 XT 16 GB delivered roughly 27% better performance than its 8 GB sibling. Similarly, the RTX 5060 Ti 16 GB held a substantial lead over the 8 GB version.
This bottleneck is so severe that it can erase architectural advantages entirely. In some cases at 4K with high settings, an older RTX 4060 Ti equipped with 16 GB of VRAM managed to match or exceed the performance of newer cards with only 8 GB due to memory constraints alone. For players aiming for maximum fidelity, more than 8 GB of VRAM is practically mandatory in this title.
Resolution Scaling and Upscaling
As resolution increases, the strain on GPUs intensifies dramatically. At 4K with Ultra High settings and Extended Ray Tracing, native performance drops into unplayable territory for most hardware. The RTX 5090 stands alone as the only card capable of breaking the 60 FPS barrier at this setting, averaging around 71 FPS. Even then, it is roughly 34% faster than the RTX 4090, which managed 53 FPS.
Mid-range cards struggle significantly here. The RX 970 XT and RTX 5070 Ti hovered around 42 FPS, while standard mid-tier options like the RTX 5060 Ti fell into a "choke point" of approximately 20-25 FPS due to VRAM limitations.
However, upscaling proves to be a massive lifesaver for this title. When enabling balanced upscaling at 1440p:
- The RTX 5090 hits roughly 136 FPS.
- The RX 7900 XTX and RTX 4090 remain locked in a tight battle around 115-116 FPS.
- Even mid-range cards see improved viability, though those with only 8 GB of VRAM still struggle to maintain smooth frame rates without lowering other settings.
At 4K with balanced upscaling, the RTX 5090 reaches 126 FPS. The RX 7900 XTX delivers a commendable 91 FPS, successfully defending its lead over the RTX 5080 (88 FPS). For players seeking high refresh rates at 4K without relying solely on upscaling, top-tier flagship hardware is required.
Ray Tracing Disabled: High Settings
Turning off ray tracing alleviates some pressure but does not eliminate it entirely. At 1080p with Ultra High settings and RT disabled, the RTX 5090 averages 144 FPS (an 18% lead over the RTX 4090). The RX 7900 XTX continues to punch above its weight, beating the RTX 5080 by a significant margin.
Interestingly, disabling ray tracing reduces VRAM pressure at lower resolutions but not completely. At 1440p Ultra High without RT, the 16 GB variants of the RX 960 XT and RTX 5060 Ti still outperform their 8 GB counterparts by nearly 20%, indicating that texture quality alone is demanding enough to fill smaller frame buffers at this resolution.
When dropping to High presets with ray tracing disabled, VRAM bottlenecks largely disappear for mid-range cards. The RX 960 XT and RTX 5060 Ti (both 8 GB and 16 GB versions) perform identically in many tests, suggesting that 8 GB is sufficient if you are willing to lower texture quality slightly while keeping ray tracing off.
Hardware Recommendations
For those looking to upgrade their system for Assassin's Creed Black Flag Resynced, the data suggests specific paths depending on your target resolution and visual fidelity:
- 4K Ultra High with Ray Tracing: Only the RTX 5090 provides a comfortable experience above 60 FPS. The RX 7900 XTX is also viable, often outperforming the RTX 5080.
- 1440p Balanced Upscaling: This is the sweet spot for most modern GPUs. An RTX 3080, RX 6800 XT, or any card with at least 16 GB of VRAM (like the RX 960 XT 16GB) will deliver smooth performance.
- Budget/Mid-Range: If you are using an RTX 5060 Ti or similar mid-range card, ensure you get the 16 GB variant if possible. The 8 GB version is heavily bottlenecked at high settings and resolutions.