AMD Radeon Pro W6800X vs NVIDIA RTX 4000 SFF Ada Generation Comparison

AMD Radeon Pro W6800X and NVIDIA RTX 4000 SFF Ada Generation occupy very different positions in the workstation GPU landscape, despite both targeting professional workloads. The data shows a near-tie in the sole shared benchmark, with the NVIDIA card edging ahead by a razor-thin 0.3% in Geekbench OpenCL, yet the AMD part holds a higher overall average benchmark score and a better percentile ranking. This is a comparison defined by architectural philosophy and physical design rather than raw performance dominance, where the W6800X leverages massive memory capacity and the RTX 4000 SFF Ada Generation counters with extreme efficiency and modern feature density.

Head-to-Head Benchmarks

The only directly comparable benchmark result between these two cards is Geekbench OpenCL, and it could not be closer. The AMD Radeon Pro W6800X scores 124,498, while the NVIDIA RTX 4000 SFF Ada Generation scores 124,812, giving NVIDIA the win by a negligible 0.3% delta. For practical purposes, this represents a statistical dead heat in compute workloads that scale well with raw shader throughput. The NVIDIA card narrowly wins the head-to-head count, taking 1 out of 1 available comparisons.

However, looking at the broader benchmark picture tells a more nuanced story. The AMD W6800X achieves an average benchmark score of 160,671 across all tested workloads, placing it in the 97th percentile of all GPUs. The RTX 4000 SFF Ada Generation, by contrast, averages 117,088, placing it in the 95th percentile. That is a 43,583-point gap in average score — a substantial margin that reflects the AMD card’s dominance in Metal-based workloads, where it scores 196,844 in Geekbench Metal, a test the NVIDIA card does not appear to have a comparable result for.

The nearest rival data further contextualizes these scores. The W6800X’s average score sits within 3.3% of the NVIDIA RTX 4500 Ada Generation (166,094), and within 2.8% of the NVIDIA RTX A5500 (165,217). Meanwhile, the RTX 4000 SFF Ada Generation’s average is within 2.8% of the NVIDIA RTX A5500 Mobile (113,944) and within 1.6% of the AMD Radeon PRO W7700 (118,976). This indicates that the W6800X competes in a higher performance tier overall, despite losing the single direct head-to-head OpenCL test.

Architecture Differences

The architectural split between these two cards is stark. The AMD Radeon Pro W6800X uses the Navi 21 chip built on RDNA 2.0 architecture, fabricated on TSMC’s 7 nm process. It packs 26,800 million transistors into a 520 mm² die, yielding a transistor density of 51.5 million per square millimeter. The NVIDIA RTX 4000 SFF Ada Generation uses the AD104 chip on Ada Lovelace architecture, fabricated on TSMC’s 5 nm process — a smaller and denser node. It contains 35,800 million transistors in a 294 mm² die, achieving a transistor density of 121.8 million per square millimeter, more than double that of the AMD chip.

Core configurations diverge significantly. The W6800X has 3,840 shading units, 240 texture mapping units, and 96 raster operation pipelines. It also includes 60 ray tracing cores. The RTX 4000 SFF Ada Generation has 6,144 shading units, 192 TMUs, and 64 ROPs, plus 48 RT cores and 192 tensor cores — a feature the AMD card lacks entirely. This gives the NVIDIA card a 60% advantage in shading unit count, though the AMD card counters with 25% more TMUs and 50% more ROPs.

Clock speeds show the efficiency story clearly. The AMD card runs at a base clock of 1800 MHz and boosts to 2087 MHz, while the NVIDIA card operates at just 720 MHz base and 1560 MHz boost. Despite the lower clocks, the NVIDIA card achieves higher FP32 throughput at 19.17 TFLOPS versus 16.03 TFLOPS for AMD, thanks to its larger shader array. In FP16, AMD doubles its rate to 32.06 TFLOPS (2:1), while NVIDIA maintains a 1:1 ratio at 19.17 TFLOPS.

Memory architecture is another major divide. The W6800X features 32 GB of GDDR6 memory on a 256-bit bus, delivering 512.0 GB/s of bandwidth. The RTX 4000 SFF Ada Generation has 20 GB of GDDR6 on a 160-bit bus, providing 280.0 GB/s — nearly half the bandwidth. The AMD card’s memory runs at 2000 MHz (16 Gbps effective), while NVIDIA’s runs at 1750 MHz (14 Gbps effective). Pixel and texture rates follow this pattern: AMD leads at 200.4 GPixel/s and 500.9 GTexel/s, versus NVIDIA’s 99.84 GPixel/s and 299.5 GTexel/s.

The Verdict

The data points to two distinct buyer profiles. The AMD Radeon Pro W6800X is the choice for those who prioritize memory capacity, fill-rate-bound workloads, and overall compute versatility across multiple API benchmarks. Its 32 GB frame buffer and 512.0 GB/s bandwidth are unmatched in this comparison, and its 97th percentile standing with an average score of 160,671 demonstrates broad strength. The 32.06 TFLOPS FP16 performance, delivered at a 2:1 ratio, makes it particularly suited for workloads that can exploit reduced precision.

The NVIDIA RTX 4000 SFF Ada Generation wins on efficiency, modern feature support, and physical adaptability. Its 70 W TDP with no power connectors required, dual-slot design, and compact 168 mm length make it deployable in environments where the AMD card’s 200 W TDP, quad-slot footprint, and Apple MPX power connector would never fit. The NVIDIA card’s 19.17 TFLOPS FP32 throughput, achieved at a fraction of the power draw, is remarkable. Its 192 tensor cores add AI acceleration capabilities that the AMD card simply does not offer.

For absolute compute performance in an open benchmark like OpenCL, the two are essentially equal, differing by only 0.3%. For everything else, the decision depends on whether the priority is raw memory bandwidth and capacity (AMD) or density, efficiency, and tensor acceleration (NVIDIA). The AMD card is end-of-life and was released in August 2021, while the NVIDIA card is active and launched in March 2023. The AMD card’s launch MSRP was 2,799 USD.

FAQ

Q: Which card is faster in Geekbench OpenCL?

A: The NVIDIA RTX 4000 SFF Ada Generation wins by a 0.3% margin, scoring 124,812 versus the AMD Radeon Pro W6800X’s 124,498.

Q: What is the memory capacity difference?

A: The AMD Radeon Pro W6800X has 32 GB of GDDR6 memory, while the NVIDIA RTX 4000 SFF Ada Generation has 20 GB. The AMD card also has a wider 256-bit bus versus 160-bit, resulting in 512.0 GB/s bandwidth compared to 280.0 GB/s.

Q: Which card has better overall benchmark standing?

A: The AMD Radeon Pro W6800X sits in the 97th percentile of all GPUs with an average benchmark score of 160,671, while the NVIDIA RTX 4000 SFF Ada Generation is in the 95th percentile with an average of 117,088.

Q: Does the NVIDIA card support tensor operations?

A: Yes, the RTX 4000 SFF Ada Generation includes 192 tensor cores. The AMD Radeon Pro W6800X has no tensor core equivalent.

Q: What are the power requirements for each card?

A: The AMD Radeon Pro W6800X has a 200 W TDP and requires a 550 W suggested power supply with an Apple MPX connector. The NVIDIA RTX 4000 SFF Ada Generation has a 70 W TDP, requires no power connectors, and suggests a 250 W power supply.

Q: Which card has a higher transistor density?

A: The NVIDIA RTX 4000 SFF Ada Generation achieves 121.8 million transistors per square millimeter on its 5 nm process, versus the AMD Radeon Pro W6800X’s 51.5 million per square millimeter on 7 nm.

Where Each One Wins

The AMD Radeon Pro W6800X wins in memory-bound scenarios. Its 32 GB frame buffer is 60% larger than NVIDIA’s 20 GB, and its 512.0 GB/s bandwidth is 83% higher. For workloads that involve large datasets, high-resolution textures, or multi-tasking across multiple displays (it offers 1x HDMI 2.1 and 4x Thunderbolt outputs), this capacity advantage is decisive. Its pixel rate of 200.4 GPixel/s and texture rate of 500.9 GTexel/s indicate superior fill-rate performance for rasterization-heavy tasks. The FP16 throughput of 32.06 TFLOPS, double its FP32 rate, gives it an edge in workloads that leverage half-precision arithmetic.

The NVIDIA RTX 4000 SFF Ada Generation wins in efficiency-constrained environments. A 70 W TDP with no auxiliary power connectors means it can be installed in systems with minimal power headroom, and its dual-slot, 168 mm length design fits in compact chassis where the AMD card’s quad-slot, 267 mm length will not. Its 19.17 TFLOPS FP32 performance is 20% higher than AMD’s 16.03 TFLOPS, making it the stronger choice for pure FP32 compute. The 192 tensor cores provide dedicated hardware for AI inference and training workloads, which the AMD card lacks entirely. Its 5 nm process and 121.8M transistors per square millimeter density reflect a more modern design that achieves higher performance per watt.

Specification Differences

| Specification | AMD Radeon Pro W6800X | NVIDIA RTX 4000 SFF Ada Generation |

|---|---|---|

| Architecture | RDNA 2.0 | Ada Lovelace |

| Process Node | 7 nm | 5 nm |

| Transistors | 26,800 million | 35,800 million |

| Die Size | 520 mm² | 294 mm² |

| Transistor Density | 51.5M / mm² | 121.8M / mm² |

| Base Clock | 1800 MHz | 720 MHz |

| Boost Clock | 2087 MHz | 1560 MHz |

| Memory Size | 32 GB | 20 GB |

| Memory Bus Width | 256 bit | 160 bit |

| Memory Bandwidth | 512.0 GB/s | 280.0 GB/s |

| Memory Clock | 2000 MHz (16 Gbps effective) | 1750 MHz (14 Gbps effective) |

| Shading Units | 3840 | 6144 |

| TMUs | 240 | 192 |

| ROPs | 96 | 64 |

| RT Cores | 60 | 48 |

| Tensor Cores | None | 192 |

| Pixel Rate | 200.4 GPixel/s | 99.84 GPixel/s |

| Texture Rate | 500.9 GTexel/s | 299.5 GTexel/s |

| FP32 | 16.03 TFLOPS | 19.17 TFLOPS |

| FP16 | 32.06 TFLOPS (2:1) | 19.17 TFLOPS (1:1) |

| TDP | 200 W | 70 W |

| Slot Width | Quad-slot | Dual-slot |

| Power Connectors | Apple MPX | None |

| Suggested PSU | 550 W | 250 W |

| Bus Interface | Apple MPX | PCIe 4.0 x16 |

| Display Outputs | 1x HDMI 2.1, 4x Thunderbolt | 4x mini-DisplayPort 1.4a |

| Length | 267 mm (10.5 inches) | 168 mm (6.6 inches) |

| Height | 120 mm (4.7 inches) | 69 mm (2.7 inches) |

| Production Status | End-of-life | Active |

| Release Date | 2021-08-02 | 2023-03-20 |

| Launch MSRP | 2,799 USD | Not stated |