AMD Radeon RX 6800 XT vs NVIDIA RTX A1000 Mobile Comparison

# AMD Radeon RX 6800 XT vs NVIDIA RTX A1000 Mobile

The AMD Radeon RX 6800 XT and NVIDIA RTX A1000 Mobile sit at opposite ends of the GPU spectrum, yet they land within 1.5% of each other in aggregate benchmark scoring. The RX 6800 XT averages 48,477 points across its benchmark suite, while the RTX A1000 Mobile averages 47,743 points. Both occupy the 85th percentile among all GPUs, but their shared percentile masks radically different design philosophies: one is a 300 W desktop behemoth, the other a 60 W mobile IGP. In head-to-head tests, the RX 6800 XT wins decisively, but the A1000 Mobile's efficiency and portability make it the sensible choice for laptop workloads.

The Verdict

The data paints a clear picture for most users. The AMD Radeon RX 6800 XT is the overwhelming performance winner, taking both available head-to-head benchmarks with massive margins. In Geekbench OpenCL, it scores 171,304 against the RTX A1000 Mobile's 48,703, a 251.7% advantage. In Geekbench Vulkan, the RX 6800 XT posts 136,875 versus 46,782, a 192.6% lead. Anyone seeking maximum compute throughput in a desktop chassis should choose the RX 6800 XT without hesitation.

However, the RTX A1000 Mobile serves a completely different purpose. Its 60 W TDP, IGP form factor, and portable-device-dependent display outputs make it a workstation laptop component, not a desktop replacement. The data shows it trades blows with mobile rivals like the AMD Radeon RX 6550M (2.2% ahead), Intel Arc A530M (2.4% ahead), and AMD Radeon RX 5600M (2.5% ahead). For professionals who need CUDA-accelerated workflows on the go, the A1000 Mobile's 64 tensor cores provide capabilities the RX 6800 XT lacks entirely.

The verdict hinges on use case. Desktop gamers and compute-heavy workloads demand the RX 6800 XT. Mobile professionals requiring NVIDIA-specific features in a low-power package should choose the RTX A1000 Mobile. The 1.5% aggregate score difference between them is noise; the architectural and physical differences are not.

Architecture Differences

The RX 6800 XT uses AMD's 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 RTX A1000 Mobile uses NVIDIA's GA107 chip on Ampere architecture, fabricated on Samsung's 8 nm process. It contains 8,700 million transistors on a 200 mm² die, with a density of 43.5 million per square millimeter. The RX 6800 XT's die is 2.6 times larger and holds over three times as many transistors.

The RX 6800 XT features 4,608 shading units, 288 texture mapping units, 128 ROPs, and 72 ray tracing cores. The RTX A1000 Mobile has 2,048 shading units, 64 TMUs, 32 ROPs, and 16 ray tracing cores. Critically, the A1000 Mobile adds 64 tensor cores—hardware the RX 6800 XT does not have at all. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, so API-level feature parity exists despite internal differences.

Shader precision handling differs markedly. The RX 6800 XT delivers 20.74 TFLOPS FP32 and 41.47 TFLOPS FP16 using a 2:1 ratio. The RTX A1000 Mobile delivers 4.669 TFLOPS for both FP32 and FP16, running at a 1:1 ratio. This means the AMD card offers nearly 4.4 times the FP32 throughput and nearly 8.9 times the FP16 throughput on paper.

Memory architecture also diverges sharply. The RX 6800 XT uses 16 GB of GDDR6 on a 256-bit bus with 512.0 GB/s bandwidth. The RTX A1000 Mobile uses 4 GB of GDDR6 on a 128-bit bus with 176.0 GB/s bandwidth. The AMD card has four times the memory capacity and nearly three times the bandwidth.

Head-to-Head Benchmarks

The available head-to-head results show a one-sided contest. In Geekbench OpenCL, the RX 6800 XT scores 171,304 against the RTX A1000 Mobile's 48,703. That 251.7% delta reflects the fundamental throughput gap: the desktop card's 20.74 TFLOPS FP32 dwarfs the mobile chip's 4.669 TFLOPS. The RX 6800 XT's 512.0 GB/s memory bandwidth also feeds far more data to its 4,608 shading units.

Geekbench Vulkan tells a similar story. The RX 6800 XT posts 136,875, while the RTX A1000 Mobile manages 46,782, a 192.6% difference. Vulkan workloads often stress geometry and memory subsystems, where the RX 6800 XT's 288 TMUs and 128 ROPs provide substantial advantages over the A1000 Mobile's 64 TMUs and 32 ROPs. The pixel rate of 288.0 GPixel/s versus 36.48 GPixel/s and texture rate of 648.0 GTexel/s versus 72.96 GTexel/s explain the magnitude of these wins.

The RTX A1000 Mobile's closest rival comparisons show it is competitive within its own segment. It sits 2.2% ahead of the AMD Radeon RX 6550M, 2.4% ahead of the Intel Arc A530M, and 2.5% ahead of the AMD Radeon RX 5600M. These margins are modest, suggesting the A1000 Mobile is a solid mid-range mobile option rather than a performance leader. The RX 6800 XT, by contrast, trails the NVIDIA GeForce RTX 5070 Ti by 3% and the AMD Radeon RX Vega 64 by 3% in its own rival set, placing it firmly in the upper tier of desktop GPUs.

Specification Differences

The two cards differ in nearly every measurable specification. Process node: 7 nm for AMD versus 8 nm for NVIDIA. Foundry: TSMC versus Samsung. Transistors: 26,800 million versus 8,700 million. Die size: 520 mm² versus 200 mm². Transistor density: 51.5M per mm² versus 43.5M per mm².

Clock speeds show the RX 6800 XT running far higher. Base clocks are 1825 MHz versus 630 MHz, and boost clocks are 2250 MHz versus 1140 MHz. The AMD card also specifies a game clock of 2015 MHz; the NVIDIA card has no game clock field. Memory clocks are 2000 MHz (16 Gbps effective) versus 1375 MHz (11 Gbps effective).

Memory configuration: 16 GB GDDR6 on a 256-bit bus versus 4 GB GDDR6 on a 128-bit bus. Bandwidth: 512.0 GB/s versus 176.0 GB/s. Pixel rate: 288.0 GPixel/s versus 36.48 GPixel/s. Texture rate: 648.0 GTexel/s versus 72.96 GTexel/s. FP32: 20.74 TFLOPS versus 4.669 TFLOPS. FP16: 41.47 TFLOPS versus 4.669 TFLOPS.

Physical and power characteristics diverge completely. The RX 6800 XT draws 300 W, requires a 700 W suggested PSU, uses dual-slot cooling with 2x 8-pin power connectors, and measures 267 mm in length, 120 mm in height, and 50 mm in width. The RTX A1000 Mobile draws 60 W, has no power connectors, uses an IGP form factor, and lists no dimensions. The AMD card uses PCIe 4.0 x16, while the NVIDIA card uses PCIe 4.0 x8. Display outputs: the RX 6800 XT offers 1x HDMI 2.1, 2x DisplayPort 1.4a, and 1x USB Type-C; the A1000 Mobile's outputs are portable-device dependent.

Release timing also differs: the RX 6800 XT launched on 2020-10-27 with a launch MSRP of 649 USD, while the RTX A1000 Mobile arrived on 2022-03-29 with no listed MSRP. Both are end-of-life products. The RX 6800 XT's predecessor is Navi and successor is Navi III; the A1000 Mobile's predecessor is Quadro Turing-M and successor is Ada-MW.

FAQ

Q: Which GPU is faster in aggregate benchmark scoring?

A: The AMD Radeon RX 6800 XT averages 48,477 points across its benchmark suite, while the NVIDIA RTX A1000 Mobile averages 47,743 points. The RX 6800 XT leads by 1.5% in this comparison.

Q: How large is the performance gap in Geekbench OpenCL?

A: The RX 6800 XT scores 171,304 versus 48,703 for the RTX A1000 Mobile, a 251.7% advantage for the AMD card.

Q: Does the RTX A1000 Mobile have any unique hardware features?

A: Yes, it includes 64 tensor cores. The RX 6800 XT has no tensor cores listed in its specifications.

Q: What are the memory capacity and bandwidth differences?

A: The RX 6800 XT has 16 GB GDDR6 on a 256-bit bus with 512.0 GB/s bandwidth. The RTX A1000 Mobile has 4 GB GDDR6 on a 128-bit bus with 176.0 GB/s bandwidth.

Q: How do their power requirements compare?

A: The RX 6800 XT has a 300 W TDP and requires a 700 W suggested PSU with 2x 8-pin connectors. The RTX A1000 Mobile has a 60 W TDP and uses no power connectors.

Q: Which GPU has better Vulkan performance?

A: The RX 6800 XT scores 136,875 in Geekbench Vulkan versus 46,782 for the RTX A1000 Mobile, a 192.6% lead for the AMD card.