AMD Radeon RX 6650M XT vs NVIDIA B200 Comparison

The Verdict

The benchmark data draws an exceptionally clear line between these two GPUs. The NVIDIA B200 is a server-class accelerator with a Geekbench OpenCL score of 345,482, placing it in the 100th percentile of all GPUs in the database. The AMD Radeon RX 6650M XT is a mobile graphics processor scoring 76,904, which lands it in the 91st percentile. The gap between them is enormous: the B200 leads by 349.2% in the recorded head-to-head benchmark.

Who should pick which? The answer follows from the hardware itself. The B200 is an SXM module with no display outputs, a 1000 W TDP, and a 1400 W suggested PSU, designed exclusively for server compute workloads. The RX 6650M XT is an integrated graphics processor for portable devices, with a 120 W TDP, no power connectors, and display outputs described as portable-device dependent. The B200 is for anyone running data-center-scale compute. The RX 6650M XT is for a laptop or compact portable system that needs graphics output. There is no realistic overlap in use cases.

Where Each One Wins

The recorded benchmark data shows only one head-to-head test: Geekbench OpenCL. The NVIDIA B200 wins that test outright, with 345,482 points versus 76,904 points for the AMD Radeon RX 6650M XT, a delta of 349.2%. This is a compute-focused test, and the B200's architecture is built around massive parallel throughput.

The RX 6650M XT wins in the context of its own product category. It is a mobile GPU with a 120 W TDP, meaning it can operate in systems where the B200 is physically and electrically impossible to install. The B200 requires a 1000 W TDP budget and a 1400 W suggested PSU, whereas the RX 6650M XT draws its power through the motherboard with no external connectors. In any scenario where power delivery and physical size are the constraints, the RX 6650M XT is the only viable option of the two.

The B200 also wins on memory capacity and bandwidth. It has 90 GB of HBM3e memory on a 4096-bit bus, delivering 4.10 TB/s of bandwidth. The RX 6650M XT has 8 GB of GDDR6 on a 128-bit bus, with 256.0 GB/s. For workloads that require large working sets or high memory throughput, the B200 is categorically superior.

Architecture Differences

The two GPUs come from entirely different design philosophies. The NVIDIA B200 uses the GB100 chip built on the Blackwell architecture, produced on a 5 nm process at TSMC. It packs 104,000 million transistors into a module with 18,944 shading units, 592 texture mapping units, and 24 raster output units. It also includes 592 tensor cores, reflecting its AI and compute focus. The B200's clock speeds are 700 MHz base and 1965 MHz boost, with memory running at 2000 MHz (8 Gbps effective).

The AMD Radeon RX 6650M XT uses the Navi 23 chip based on RDNA 2.0, manufactured on a 7 nm process, also at TSMC. It has 11,060 million transistors on a die size of 237 mm², giving a transistor density of 46.7 million per square millimeter. The chip contains 2,048 shading units, 128 TMUs, and 64 ROPs, plus 32 ray tracing cores. It has no tensor cores. Its clocks are substantially higher in raw frequency: 2068 MHz base, 2416 MHz boost, and 2162 MHz game clock, with memory at 2000 MHz (16 Gbps effective).

The B200's FP32 throughput is 74.45 TFLOPS, while the RX 6650M XT delivers 9.896 TFLOPS. In FP16, the B200 reaches 1,191.2 TFLOPS using a 16:1 ratio, while the RX 6650M XT achieves 19.79 TFLOPS with a 2:1 ratio. The B200's FP16 ratio indicates a heavy bias toward AI and tensor workloads, whereas the RX 6650M XT's 2:1 ratio is typical for graphics-oriented RDNA 2 hardware.

Other differences include process node (5 nm versus 7 nm), memory type (HBM3e versus GDDR6), bus width (4096-bit versus 128-bit), and bus interface (PCIe 5.0 x16 versus PCIe 4.0 x8). The B200 has no display outputs, while the RX 6650M XT supports portable-device-dependent display outputs. The B200 is listed as active production, while the RX 6650M XT is end-of-life, having been released on 2022-01-03.

FAQ

Q: Which GPU is faster in the recorded benchmark?

A: The NVIDIA B200 scores 345,482 in Geekbench OpenCL, while the AMD Radeon RX 6650M XT scores 76,904. The B200 leads by 349.2% in the head-to-head comparison.

Q: Can the NVIDIA B200 be used in a laptop?

A: No. The B200 is an SXM module with no display outputs, a 1000 W TDP, and requires a 1400 W suggested PSU. It is designed for server installations, not portable systems.

Q: Does the AMD Radeon RX 6650M XT support ray tracing?

A: Yes. The RX 6650M XT includes 32 ray tracing cores and supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Q: How does the B200 compare to its nearest rivals?

A: The B200 is 3.2% ahead of the NVIDIA H200 NVL, 8.6% ahead of the AMD Instinct MI300X, and 16.8% ahead of the NVIDIA L40S in average benchmark scores. It trails the NVIDIA B300 SXM6 AC by 6.6%.

Q: How does the RX 6650M XT compare to its nearest rivals?

A: The RX 6650M XT is 1% ahead of the NVIDIA GeForce RTX 5090 D, 2.6% ahead of the AMD Radeon RX 6850M XT, 3.1% ahead of the NVIDIA Tesla P100 PCIe 12 GB, and 3.4% ahead of the NVIDIA Tesla P100 PCIe 16 GB.

Q: What memory configurations do these GPUs use?

A: The B200 uses 90 GB of HBM3e on a 4096-bit bus with 4.10 TB/s bandwidth. The RX 6650M XT uses 8 GB of GDDR6 on a 128-bit bus with 256.0 GB/s bandwidth.

Head-to-Head Benchmarks

The only recorded head-to-head benchmark is Geekbench OpenCL, and it is a decisive win for the NVIDIA B200. The B200 posts 345,482 points, while the AMD Radeon RX 6650M XT posts 76,904 points. The delta is 349.2%, meaning the B200 delivers roughly four and a half times the OpenCL performance of the RX 6650M XT.

That margin is consistent with the raw specification differences. The B200 has 18,944 shading units versus 2,048 on the RX 6650M XT, a 9.25x advantage in raw shader count. Its FP32 throughput of 74.45 TFLOPS is 7.5x higher than the RX 6650M XT's 9.896 TFLOPS. The B200's texture rate of 1,163.3 GTexel/s is 3.8x higher than the 309.2 GTexel/s of the RX 6650M XT. The pixel rate comparison is closer, with the B200 at 47.16 GPixel/s versus 154.6 GPixel/s for the RX 6650M XT; the mobile part actually wins that metric due to its higher ROP count relative to shading units.

Memory bandwidth is another massive differentiator. The B200's 4.10 TB/s is 16x higher than the RX 6650M XT's 256.0 GB/s. The B200 also has 90 GB of memory versus 8 GB, which matters for large data-center workloads. The RX 6650M XT compensates with higher clock speeds, but raw frequency cannot overcome the B200's architectural scale.

For context, the B200 sits at the top of the database with a 100th percentile ranking among all GPUs. Its nearest rival, the NVIDIA H200 NVL, scores 334,891, which is 3.2% lower. The AMD Instinct MI300X scores 317,994, 8.6% lower, and the NVIDIA L40S scores 295,763, 16.8% lower. The B300 SXM6 AC is the only GPU above it, at 369,831, which is 6.6% higher.

The RX 6650M XT, by contrast, sits at the 91st percentile among all GPUs. Its nearest rivals are tightly clustered: the NVIDIA GeForce RTX 5090 D at 77,712 (1% lower), the AMD Radeon RX 6850M XT at 78,940 (2.6% lower), the NVIDIA Tesla P100 PCIe 12 GB at 79,396 (3.1% lower), and the NVIDIA Tesla P100 PCIe 16 GB at 79,605 (3.4% lower). The RX 6650M XT is competitive within its mobile segment, but that segment is an entirely different performance tier from the B200.

In summary, the benchmark data shows a single dominant result: the NVIDIA B200 is a server compute powerhouse that outperforms the AMD Radeon RX 6650M XT by 349.2% in OpenCL. The RX 6650M XT remains a capable mobile part for portable gaming and graphics tasks, but it is not in the same performance class as the B200.