AMD Radeon RX 6650M vs NVIDIA A100 SXM4 80 GB Comparison

The NVIDIA A100 SXM4 80 GB and AMD Radeon RX 6650M occupy opposite ends of the GPU spectrum, one built for massive server workloads and the other for mobile gaming laptops. The recorded data shows a single shared benchmark result, Geekbench Vulkan, and the gap is enormous. The A100 scores 183,725, while the RX 6650M scores 77,735, a delta of 136.3% in favor of the NVIDIA part. This places the A100 in the 98th percentile of all GPUs in the database, while the RX 6650M sits in the 91st percentile. Despite the A100 being a compute-focused accelerator with no display outputs, its raw graphics throughput in this test dwarfs the mobile AMD chip.

Head-to-Head Benchmarks

The only direct comparison available in the database is the Geekbench Vulkan test. The NVIDIA A100 SXM4 80 GB delivers 183,725 points, versus 77,735 for the AMD Radeon RX 6650M. That is a 136.3% advantage, meaning the A100 more than doubles the AMD part’s score. This is not a marginal win; it is a categorical one. The A100’s nearest rivals in the database include the NVIDIA RTX 5000 Ada Generation at 184,664 points (0.5% higher), the NVIDIA RTX PRO 5000 Blackwell at 182,109 points (0.9% lower), the NVIDIA A100 SXM4 40 GB at 187,147 points (1.8% higher), and the NVIDIA GeForce RTX 4090 D at 178,050 points (3.2% lower). The A100 sits comfortably in that cluster, trading blows with top-tier workstation and consumer flagships.

The RX 6650M, by contrast, has rivals that are far less powerful. Its nearest neighbors are the NVIDIA TITAN X Pascal at 72,098 points (0.5% lower), the AMD Radeon Pro Vega 64 at 72,379 points (0.8% lower), the AMD Radeon RX 6600 LE at 70,829 points (1.3% higher), and the AMD Radeon Vega Frontier Edition at 73,370 points (2.2% lower). The RX 6650M’s 77,735 points put it just ahead of those older or lower-tier parts, but it is nowhere near the A100’s performance class. The data shows a clear stratification: the A100 competes with the fastest GPUs ever made, while the RX 6650M sits in the upper-midrange of the database.

What does this mean in practice? The Vulkan benchmark measures graphics and compute throughput under a specific API. The A100’s 136.3% lead suggests that for any workload that can leverage Vulkan, the NVIDIA accelerator will finish tasks in less than half the time of the AMD mobile chip. The A100 also has a much higher average benchmark score of 183,725, while the RX 6650M averages 71,768 across its two recorded tests (OpenCL and Vulkan). Even the RX 6650M’s OpenCL score of 65,800 is lower than its Vulkan score, indicating that the mobile GPU does not reach the A100’s performance level on any measured metric.

Where Each One Wins

The A100 wins the only head-to-head benchmark, and it wins decisively. Its 136.3% delta over the RX 6650M in Vulkan is the single biggest differentiator in the data. The A100 also holds a massive advantage in raw specifications that support its benchmark lead. It has 6,912 shading units versus 1,792 on the RX 6650M, 432 texture mapping units versus 112, and 160 render output units versus 64. The A100’s 432 tensor cores have no equivalent on the AMD side, as the RX 6650M lists no tensor core count. The A100 also has a much larger memory subsystem: 80 GB of HBM2e on a 5120-bit bus, delivering 2.04 TB/s of bandwidth. The RX 6650M has 8 GB of GDDR6 on a 128-bit bus, yielding 224.0 GB/s. That is a 9.1x difference in memory bandwidth, which directly impacts Vulkan performance in memory-intensive scenes.

The RX 6650M does have wins, but they are not in raw performance. It supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, while the A100 lists no API support in the database. The RX 6650M also has 28 ray tracing cores, while the A100 lists none. For mobile gaming or ray-traced workloads on a laptop, the RX 6650M is the more feature-complete option. Its boost clock is higher at 2416 MHz versus the A100’s 1410 MHz, and its base clock is 2068 MHz versus 1275 MHz. However, clock speed alone does not compensate for the A100’s vastly larger chip and memory subsystem.

The A100’s wins are in compute density. It has a transistor count of 54,200 million on an 826 mm² die, while the RX 6650M has 11,060 million transistors on a 237 mm² die. The A100’s transistor density is 65.6M per mm², compared to 46.7M per mm² on the AMD chip. The A100 also has a higher pixel rate at 225.6 GPixel/s versus 154.6 GPixel/s, and a higher texture rate at 609.1 GTexel/s versus 270.6 GTexel/s. In floating-point performance, the A100 delivers 19.49 TFLOPS FP32 and 77.97 TFLOPS FP16 (4:1), while the RX 6650M delivers 8.659 TFLOPS FP32 and 17.32 TFLOPS FP16 (2:1). The A100 is more than 2x faster in FP32 and over 4x faster in FP16.

The Verdict

The data points to a simple conclusion: the NVIDIA A100 SXM4 80 GB is in a different performance league than the AMD Radeon RX 6650M. If the workload is Vulkan-based compute or graphics, the A100 delivers 136.3% higher scores, placing it among the top 2% of all GPUs in the database. The RX 6650M, while respectable at the 91st percentile, cannot compete on raw throughput. Its only advantages are in API support and ray tracing capabilities, which are relevant for gaming or real-time graphics on a portable device.

Who should pick the A100? Any user running server-side workloads, AI inference, HPC simulations, or large-scale data processing where the 80 GB memory pool and 2.04 TB/s bandwidth are critical. The A100 has no display outputs, so it is not a gaming card. Its end-of-life status and 400 W TDP suggest a data center component, not a desktop part. The A100’s predecessor is Tesla Turing, and its successor is Server Ada, confirming its lineage as a compute accelerator.

Who should pick the RX 6650M? Anyone needing a mobile GPU with DirectX 12 Ultimate support, ray tracing cores, and a lower power envelope of 120 W. It is an integrated graphics processor (IGP) with portable-device-dependent outputs, meaning it is designed for laptops. Its 8 GB of VRAM is sufficient for mainstream gaming at 1080p, and its Vulkan 1.4 support ensures modern API compatibility. The RX 6650M’s predecessor is Polaris Mobile, and it has no successor listed, indicating it was a one-off mobile design.

The verdict is not about which is “better” in a vacuum, but which fits the intended use case. The A100 wins every measured performance metric, but the RX 6650M wins on feature set for consumer graphics. The 136.3% Vulkan delta is the headline number, but the underlying specification differences explain why: 5x more shading units, 9x more memory bandwidth, and 4.5x more transistors. The A100 is a compute monster; the RX 6650M is a mobile graphics chip. Their paths cross only in the benchmark database, and there, the A100 is untouchable.

FAQ

Q: Which GPU has the higher Vulkan benchmark score?

A: The NVIDIA A100 SXM4 80 GB scores 183,725, while the AMD Radeon RX 6650M scores 77,735, giving the A100 a 136.3% advantage.

Q: How does the A100 compare to its nearest rivals in the database?

A: The A100 is 0.5% slower than the NVIDIA RTX 5000 Ada Generation, 0.9% faster than the NVIDIA RTX PRO 5000 Blackwell, 1.8% slower than the A100 SXM4 40 GB, and 3.2% faster than the GeForce RTX 4090 D.

Q: Does the RX 6650M have any features the A100 lacks?

A: Yes, the RX 6650M supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, while the A100 lists no API support. The RX 6650M also has 28 ray tracing cores, while the A100 lists none.

Q: What is the memory configuration difference?

A: The A100 has 80 GB of HBM2e on a 5120-bit bus with 2.04 TB/s bandwidth. The RX 6650M has 8 GB of GDDR6 on a 128-bit bus with 224.0 GB/s bandwidth.

Q: Which GPU has a higher transistor density?

A: The A100 has 65.6M transistors per mm², while the RX 6650M has 46.7M per mm². The A100’s total transistor count is 54,200 million versus 11,060 million on the RX 6650M.

Q: What are the power requirements?

A: The A100 has a TDP of 400 W and a suggested PSU of 800 W. The RX 6650M has a TDP of 120 W and no suggested PSU listed. The A100 uses an OAM module slot, while the RX 6650M is an IGP.

Architecture Differences

The two GPUs come from fundamentally different design philosophies. The A100 uses the GA100 chip based on the Ampere architecture, a server-focused design from NVIDIA’s Server Ampere generation. The RX 6650M uses the Navi 23 chip based on RDNA 2.0, part of AMD’s Navi Mobile generation. Both are fabricated on a 7 nm process at TSMC, but that is where the similarity ends.

The A100’s GA100 die measures 826 mm² and contains 54,200 million transistors, yielding a density of 65.6M per mm². The RX 6650M’s Navi 23 die is 237 mm² with 11,060 million transistors, for a density of 46.7M per mm². The A100 packs 6,912 shading units, 432 TMUs, 160 ROPs, and 432 tensor cores. It has no ray tracing cores listed. The RX 6650M has 1,792 shading units, 112 TMUs, 64 ROPs, and 28 ray tracing cores, with no tensor cores listed.

Memory architecture differs drastically. The A100 uses 80 GB of HBM2e on a 5120-bit bus, achieving 2.04 TB/s bandwidth. The RX 6650M uses 8 GB of GDDR6 on a 128-bit bus, achieving 224.0 GB/s. The A100’s memory clock is 1593 MHz (3.2 Gbps effective), while the RX 6650M’s is 1750 MHz (14 Gbps effective). The A100’s wider bus compensates for its lower clock speed, resulting in nearly 10x the bandwidth.

Compute rates also diverge. The A100 achieves 19.49 TFLOPS FP32 and 77.97 TFLOPS FP16 with a 4:1 ratio. The RX 6650M achieves 8.659 TFLOPS FP32 and 17.32 TFLOPS FP16 with a 2:1 ratio. The A100’s pixel rate is 225.6 GPixel/s, and its texture rate is 609.1 GTexel/s. The RX 6650M’s pixel rate is 154.6 GPixel/s, and its texture rate is 270.6 GTexel/s. The A100 also has a higher transistor density, indicating a more densely packed design.

The bus interface differs as well. The A100 uses PCIe 4.0 x16, while the RX 6650M uses PCIe 4.0 x8. This halves the available bandwidth for the AMD part in CPU-to-GPU transfers. The A100 has no display outputs, while the RX 6650M’s outputs are portable-device dependent. The A100 is an OAM module with no power connectors, while the RX 6650M is an IGP with no power connectors as well. The A100’s TDP is 400 W, while the RX 6650M’s is 120 W, making the AMD chip far more power-efficient for mobile use.

Specification Differences

The two GPUs differ in nearly every specification field. The A100 has a base clock of 1275 MHz and a boost clock of 1410 MHz, while the RX 6650M has a base clock of 2068 MHz, a boost clock of 2416 MHz, and a game clock of 2222 MHz. The AMD chip runs at higher clocks, but the A100 compensates with more execution units.

Shading units: 6,912 on the A100 versus 1,792 on the RX 6650M. TMUs: 432 versus 112. ROPs: 160 versus 64. Tensor cores: 432 on the A100, none listed on the RX 6650M. Ray tracing cores: none on the A100, 28 on the RX 6650M. The A100’s FP32 throughput is 19.49 TFLOPS, while the RX 6650M’s is 8.659 TFLOPS. FP16 throughput is 77.97 TFLOPS versus 17.32 TFLOPS.

Memory size: 80 GB versus 8 GB. Memory type: HBM2e versus GDDR6. Bus width: 5120 bit versus 128 bit. Bandwidth: 2.04 TB/s versus 224.0 GB/s. Pixel rate: 225.6 GPixel/s versus 154.6 GPixel/s. Texture rate: 609.1 GTexel/s versus 270.6 GTexel/s.

Power: TDP of 400 W versus 120 W. The A100 suggests an 800 W PSU, while the RX 6650M lists none. Slot width: OAM Module versus IGP. Bus interface: PCIe 4.0 x16 versus PCIe 4.0 x8. Display outputs: none versus portable-device dependent. The A100’s release date is November 2020, while the RX 6650M’s is January 2022. The A100’s predecessor is Tesla Turing, and its successor is Server Ada. The RX 6650M’s predecessor is Polaris Mobile, with no successor listed. Both are end-of-life, and neither has a launch MSRP in the database.