AMD Radeon RX 6900 XT vs NVIDIA RTX A1000 Mobile Comparison

Head-to-Head Benchmarks

The data reveals a decisive performance gap in the two shared benchmark tests. In Geekbench OpenCL, the AMD Radeon RX 6900 XT scores 187,673 against the NVIDIA RTX A1000 Mobile’s 48,703, a delta of 285.3%. That is not a marginal edge; it is a three-and-a-half-fold difference in raw compute throughput. The Geekbench Vulkan result tells a similar story, with the RX 6900 XT posting 148,525 versus 46,782, a 217.5% advantage. Both tests are wins for AMD, and the margin is so large that it resets expectations for what a mobile workstation GPU can accomplish relative to a desktop flagship.

The average benchmark scores reinforce this hierarchy. The RX 6900 XT carries an average score of 50,951 across its entire benchmark suite, while the RTX A1000 Mobile averages 47,743. That is only a 6.7% difference in aggregate, which might suggest near-parity. Yet the head-to-head numbers show the opposite: in the only tests both cards ran, the AMD part is anywhere from 217% to 285% ahead. The average score is skewed because the RX 6900 XT’s suite includes multiple PassMark tests (DirectX 9, 10, 11, 12, G2D, G3D, and compute) that pull its mean down, whereas the RTX A1000 Mobile only ran two Geekbench workloads. The percentile rankings are close — 86th for AMD versus 85th for NVIDIA — but percentiles compare each card against all GPUs, not against each other directly. When the two are placed side by side in identical workloads, the RX 6900 XT is the clear victor.

Looking at the nearest rivals for each card adds context. The RX 6900 XT sits within 2.4% of the Intel Arc A550M (49,737) and 2.0% of the NVIDIA GeForce RTX 5070 Ti (49,957), while trailing the NVIDIA CMP 50HX (51,790) by just 1.6%. The RTX A1000 Mobile, by contrast, is 1.5% behind the AMD Radeon RX 6800 XT (48,477) and 2.2% ahead of the AMD Radeon RX 6550M (46,702). This places the mobile NVIDIA part in the same performance tier as desktop GPUs from the previous generation, but the RX 6900 XT is operating in a higher absolute range. In Geekbench OpenCL, the RX 6900 XT’s 187,673 dwarfs the RTX A1000 Mobile’s 48,703 by a factor of 3.85, and in Vulkan the factor is 3.17. The data does not merely suggest AMD wins; it suggests the NVIDIA part is in a different performance class entirely.

Where Each One Wins

The RX 6900 XT wins every benchmark it shares with the RTX A1000 Mobile. That includes both OpenCL and Vulkan compute workloads, which are common in rendering, scientific simulation, and machine learning inference. The AMD card’s 285.3% lead in OpenCL indicates a massive advantage in general-purpose compute, where shading units and raw FP32 throughput dominate. Its 217.5% lead in Vulkan suggests that graphics-heavy workloads that leverage the Vulkan API will also favor AMD overwhelmingly. There is no test in the data where the RTX A1000 Mobile comes out ahead, so from a pure performance standpoint, the NVIDIA part has no winning category.

However, the RTX A1000 Mobile has structural advantages that the benchmark scores do not capture. It is an IGP (integrated graphics processor) with no power connectors, a 60 W TDP, and dimensions listed as "Portable Device Dependent." The RX 6900 XT, by contrast, is a triple-slot card requiring two 8-pin power connectors and a 700 W suggested PSU. The NVIDIA part is designed for environments where power and space are constrained — laptops, compact workstations, or embedded systems. The AMD card cannot function in those contexts. So while the RTX A1000 Mobile loses every benchmark, it wins in deployability. It also has 64 tensor cores, which the RX 6900 XT lacks entirely. Tensor cores accelerate AI workloads like deep learning inference, and while the data does not include a direct tensor-core benchmark, the hardware difference is significant for users running neural networks. The RX 6900 XT’s 80 ray-tracing cores versus the RTX A1000 Mobile’s 16 also matter, but in the opposite direction: AMD has five times the ray-tracing hardware, which should translate to better ray-traced rendering performance in supported titles.

Architecture Differences

The two GPUs come from different foundries and process nodes. The RX 6900 XT uses TSMC’s 7 nm process, packing 26,800 million transistors into a 520 mm² die, yielding a density of 51.5 million transistors per square millimeter. The RTX A1000 Mobile uses Samsung’s 8 nm process, with 8,700 million transistors on a 200 mm² die, for a density of 43.5M / mm². The AMD chip is physically larger, more complex, and built on a slightly more advanced node. This translates into a massive resource advantage: the RX 6900 XT has 5,120 shading units, 320 texture mapping units, and 128 ROPs, compared to 2,048 shading units, 64 TMUs, and 32 ROPs on the NVIDIA part. The AMD card has 2.5 times the shading units, 5 times the TMUs, and 4 times the ROPs.

Memory is another clear differentiator. The RX 6900 XT carries 16 GB of GDDR6 on a 256-bit bus, delivering 512.0 GB/s of bandwidth. The RTX A1000 Mobile has 4 GB of GDDR6 on a 128-bit bus, yielding 176.0 GB/s. That is a 290% bandwidth advantage for AMD, which directly impacts texture-heavy workloads and high-resolution rendering. Clock speeds also favor AMD: the RX 6900 XT boosts to 2250 MHz with a base of 1825 MHz, while the RTX A1000 Mobile boosts to just 1140 MHz with a base of 630 MHz. The NVIDIA card’s low clocks are a concession to its 60 W power envelope, but the result is a peak FP32 throughput of 4.669 TFLOPS versus 23.04 TFLOPS for AMD — a 4.9x difference in raw compute. The RTX A1000 Mobile does offer FP16 at a 1:1 ratio (4.669 TFLOPS), while the RX 6900 XT’s FP16 is 2:1 (46.08 TFLOPS), but even at half rate, AMD’s FP16 is 9.9 times higher.

Architecturally, the RX 6900 XT is built on RDNA 2.0, part of the Navi II generation, while the RTX A1000 Mobile is Ampere, from the Ampere-MW (Ax000) generation. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, so API compatibility is identical. The RX 6900 XT uses a PCIe 4.0 x16 interface; the RTX A1000 Mobile uses PCIe 4.0 x8. The bandwidth difference is unlikely to matter in most workloads, but it does favor AMD. The RTX A1000 Mobile’s predecessor is Quadro Turing-M and its successor is Ada-MW, positioning it in NVIDIA’s professional mobile line. The RX 6900 XT’s predecessor is Navi and its successor is Navi III, marking it as a consumer desktop flagship. Both are end-of-life products, but they were released 17 months apart: the RX 6900 XT on 2020-10-27 and the RTX A1000 Mobile on 2022-03-29.

The Verdict

The data is unambiguous: the AMD Radeon RX 6900 XT outperforms the NVIDIA RTX A1000 Mobile in every shared benchmark by margins exceeding 200%. For compute-heavy tasks like OpenCL and Vulkan workloads, the RX 6900 XT delivers 285.3% and 217.5% better scores, respectively. Its 16 GB of memory, 512 GB/s bandwidth, and 23.04 TFLOPS FP32 throughput make it the obvious choice for desktop workstations where performance is the sole criterion. The RTX A1000 Mobile’s 4 GB memory and 176 GB/s bandwidth are not just lower; they are categorically insufficient for large datasets or high-resolution textures.

However, the RTX A1000 Mobile is not a desktop card. It is an IGP with a 60 W TDP, no power connectors, and portable-device-dependent outputs. The RX 6900 XT demands a triple-slot chassis, a 700 W PSU, and two 8-pin connectors. For a laptop or a compact embedded system, the NVIDIA card is the only option that fits. The RTX A1000 Mobile also has 64 tensor cores, which the RX 6900 XT lacks. If the workload involves AI inference or training, the tensor cores provide a hardware acceleration path that AMD cannot match, even if the raw FP32 numbers favor AMD. The RTX A1000 Mobile’s 85th percentile ranking and its proximity to the RX 6800 XT (within 1.5%) suggest it is no slouch for a mobile part, but it is simply outclassed by the RX 6900 XT.

Users who need maximum compute performance, large memory capacity, or ray-tracing throughput should choose the RX 6900 XT. Users who require a low-power, compact GPU with tensor-core acceleration for AI workflows should choose the RTX A1000 Mobile. The data does not support any other conclusion.

FAQ

Q: How much faster is the AMD Radeon RX 6900 XT in Geekbench OpenCL?

A: It scores 187,673 versus 48,703 for the RTX A1000 Mobile, a 285.3% lead.

Q: Does the NVIDIA RTX A1000 Mobile win any of the shared benchmarks?

A: No. The head-to-head data shows 2 wins for AMD and 0 for NVIDIA across the two Geekbench tests.

Q: What is the memory bandwidth difference between the two cards?

A: The RX 6900 XT has 512.0 GB/s over a 256-bit bus, while the RTX A1000 Mobile has 176.0 GB/s over a 128-bit bus.

Q: Which card has tensor cores and which does not?

A: The RTX A1000 Mobile has 64 tensor cores. The RX 6900 XT has no tensor cores (null).

Q: Are both cards still in production?

A: No. The production status for both is "End-of-life."

Q: How do the two cards compare in transistor count?

A: The RX 6900 XT has 26,800 million transistors on a 520 mm² die, while the RTX A1000 Mobile has 8,700 million on a 200 mm² die.

Specification Differences

| Field | AMD Radeon RX 6900 XT | NVIDIA RTX A1000 Mobile |

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

| Architecture | RDNA 2.0 | Ampere |

| Generation | Navi II (RX 6000) | Ampere-MW (Ax000) |

| Process Node | 7 nm (TSMC) | 8 nm (Samsung) |

| Transistors | 26,800 million | 8,700 million |

| Die Size | 520 mm² | 200 mm² |

| Transistor Density | 51.5M / mm² | 43.5M / mm² |

| Base Clock | 1825 MHz | 630 MHz |

| Boost Clock | 2250 MHz | 1140 MHz |

| Game Clock | 2015 MHz | null |

| Memory Clock | 2000 MHz / 16 Gbps effective | 1375 MHz / 11 Gbps effective |

| Memory Size | 16 GB | 4 GB |

| Memory Bus Width | 256 bit | 128 bit |

| Memory Bandwidth | 512.0 GB/s | 176.0 GB/s |

| Shading Units | 5120 | 2048 |

| TMUs | 320 | 64 |

| ROPs | 128 | 32 |

| RT Cores | 80 | 16 |

| Tensor Cores | null | 64 |

| Pixel Rate | 288.0 GPixel/s | 36.48 GPixel/s |

| Texture Rate | 720.0 GTexel/s | 72.96 GTexel/s |

| FP32 | 23.04 TFLOPS | 4.669 TFLOPS |

| FP16 | 46.08 TFLOPS (2:1) | 4.669 TFLOPS (1:1) |

| TDP | 300 W | 60 W |

| Slot Width | Triple-slot | IGP |

| Power Connectors | 2x 8-pin | None |

| Suggested PSU | 700 W | null |

| Bus Interface | PCIe 4.0 x16 | PCIe 4.0 x8 |

| Display Outputs | 1x HDMI 2.1, 2x DisplayPort 1.4a, 1x USB Type-C | Portable Device Dependent |

| Dimensions | 267 mm x 120 mm x 50 mm | null |

| Release Date | 2020-10-27 | 2022-03-29 |

| Launch MSRP | 999 USD | null |

| Predecessor | Navi | Quadro Turing-M |

| Successor | Navi III | Ada-MW |

| Avg Benchmark Score | 50951 | 47743 |

| Percentile vs All GPUs | 86 | 85 |