AMD Radeon RX 6650M XT vs NVIDIA H200 NVL Comparison

Head-to-Head Benchmarks

The recorded data contains a single head-to-head benchmark comparison: Geekbench OpenCL. In this test, the NVIDIA H200 NVL delivers a score of 334,891, while the AMD Radeon RX 6650M XT records 76,904. The delta is massive: the H200 NVL leads by 335.5 percent. That is not a marginal gap; it is a difference of roughly 4.4 times the raw score. For context, the H200 NVL sits at the 100th percentile among all GPUs in the database, meaning no other recorded part scores higher in this workload. The RX 6650M XT, by contrast, lands at the 91st percentile, which is still strong for a mobile part, but it is operating in a completely different performance tier.

Looking at the H200 NVL's nearest rivals clarifies how dominant its score is. The NVIDIA B200 posts a 345,482 average, which is 3.1 percent higher. The B300 SXM6 AC reaches 369,831, 9.4 percent higher. On the other side, the AMD Instinct MI300X scores 317,994, which is 5.3 percent lower than the H200 NVL. The NVIDIA L40S trails by 13.2 percent with a 295,763 average. So while the H200 NVL is not the absolute fastest accelerator in the database, it is within a single-digit percentage of the top B200 and B300 parts, and it clearly outpaces the MI300X and L40S. This is a server-class compute card built for scale.

The RX 6650M XT's rival set is telling in a different way. Its nearest competitor is the NVIDIA GeForce RTX 5090 D at 77,712, just 1 percent ahead. The AMD Radeon RX 6850M XT scores 78,940, 2.6 percent higher. The NVIDIA Tesla P100 PCIe 12 GB and 16 GB variants score 79,396 and 79,605, which are 3.1 and 3.4 percent higher, respectively. This means the RX 6650M XT is a mid-pack mobile GPU, competitive with desktop-class accelerators from a few generations ago, but nowhere near the compute density of a Hopper-based server part. The H200 NVL's OpenCL score is not just larger; it is categorically different in magnitude.

The delta of 335.5 percent is the headline. No other comparison in this dataset comes close to that spread. The H200 NVL wins the only recorded head-to-head test, and it wins by a factor that dwarfs any other delta in either card's rival list. For a database that tracks raw compute output, this is a one-sided matchup.

Architecture Differences

The two GPUs are built on different architectures, nodes, and design philosophies. The NVIDIA H200 NVL uses the GH100 chip on the Hopper architecture, fabricated by TSMC on a 5 nm process. It packs 80,000 million transistors on a die size of 814 mm², giving a transistor density of 98.3 million per mm². The AMD Radeon RX 6650M XT uses the Navi 23 chip on RDNA 2.0, also from TSMC but on a 7 nm node. Its transistor count is 11,060 million on a 237 mm² die, with a density of 46.7 million per mm². The H200 NVL has roughly 7.2 times more transistors and a die that is more than three times larger. The density difference is also notable: Hopper's 5 nm process packs more than double the transistors per square millimeter compared to RDNA 2.0's 7 nm node.

The memory subsystem is where the gap becomes extreme. The H200 NVL carries 141 GB of HBM3e on a 6144-bit bus, delivering a bandwidth of 4.89 TB/s. The RX 6650M XT has 8 GB of GDDR6 on a 128-bit bus, with a bandwidth of 256.0 GB/s. That is a 19.1 times difference in bandwidth, and a 17.6 times difference in memory capacity. The H200 NVL's memory clock runs at 1593 MHz, with 6.4 Gbps effective, while the RX 6650M XT's memory runs at 2000 MHz and 16 Gbps effective. The bus width is the real separator: 6144 bits versus 128 bits. No mobile GPU can compete with that memory pipeline.

Compute resources follow the same pattern. The H200 NVL has 16,896 shading units, 528 TMUs, and 24 ROPs. It also includes 528 tensor cores, which are absent from the RX 6650M XT. The AMD card has 2,048 shading units, 128 TMUs, 64 ROPs, and 32 ray tracing cores. The H200 NVL has no RT cores listed, but it has tensor cores dedicated to AI and HPC workloads. The FP32 throughput is 60.32 TFLOPS for the H200 NVL versus 9.896 TFLOPS for the RX 6650M XT. FP16 is 120.6 TFLOPS for the H200 NVL versus 19.79 TFLOPS for the AMD part. Pixel rate favors the RX 6650M XT: 154.6 GPixel/s versus 42.84 GPixel/s. Texture rate favors the H200 NVL: 942.5 GTexel/s versus 309.2 GTexel/s. The AMD card's higher pixel rate is likely due to its smaller memory footprint and simpler ROP configuration, but raw shading and tensor performance are overwhelmingly in NVIDIA's favor.

Clock speeds are another divergence. The RX 6650M XT runs a base clock of 2068 MHz and a boost of 2416 MHz, with a game clock of 2162 MHz. The H200 NVL runs a base of 1365 MHz and a boost of 1785 MHz. The AMD card operates at higher frequencies, but the H200 NVL compensates with vastly more cores and memory bandwidth. The power envelope tells the story: the H200 NVL has a TDP of 600 W, while the RX 6650M XT is rated at 120 W. That is a 5 times difference in power draw, which explains why the H200 NVL is a dual-slot server card with an 8-pin EPS connector and a suggested PSU of 1000 W, while the RX 6650M XT is an IGP with no power connectors and no PSU recommendation. The RX 6650M XT is designed for mobile or compact systems; the H200 NVL is built for data center racks.

The API support also differs. The RX 6650M XT supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The H200 NVL lists N/A for DirectX, OpenGL, and Vulkan, which is consistent with a compute-focused accelerator that has no display outputs. The H200 NVL has no display outputs at all, while the RX 6650M XT outputs are portable device dependent. The bus interface is PCIe 5.0 x16 for the H200 NVL versus PCIe 4.0 x8 for the AMD card. The H200 NVL is 267 mm long and 111 mm tall, while the RX 6650M XT has no listed dimensions.

The Verdict

The data is unambiguous. The NVIDIA H200 NVL is a server-grade compute accelerator with a 100th percentile OpenCL score, 141 GB of HBM3e memory, 4.89 TB/s of bandwidth, and 60.32 TFLOPS of FP32 throughput. The AMD Radeon RX 6650M XT is a mobile RDNA 2 part with 8 GB of GDDR6, 256 GB/s of bandwidth, and 9.896 TFLOPS of FP32. The H200 NVL wins the only head-to-head benchmark by 335.5 percent, and it holds a 5.3 percent lead over the AMD Instinct MI300X, a direct data center competitor. The RX 6650M XT, by contrast, is within 3.4 percent of the Tesla P100 PCIe variants, which are several generations old. There is no scenario in the recorded data where the RX 6650M XT outperforms the H200 NVL in compute throughput.

The H200 NVL is for workloads that demand massive memory capacity, extreme bandwidth, and tensor core acceleration. The RX 6650M XT is for systems that need a compact, low-power GPU with modern API support and a 91st percentile score, which is respectable for a mobile part. The RX 6650M XT has a higher pixel rate (154.6 GPixel/s versus 42.84 GPixel/s), which could imply better rasterization throughput for certain graphics tasks, but the H200 NVL has no display outputs and no consumer API support, so it is not designed for gaming or desktop rendering. The verdict is simple: choose the H200 NVL for AI, HPC, or any compute-heavy server workload. Choose the RX 6650M XT if the system requires a mobile GPU with DirectX 12 Ultimate and Vulkan 1.4 support, and if the power budget is 120 W rather than 600 W.

FAQ

Q: How much faster is the NVIDIA H200 NVL in the Geekbench OpenCL test?

A: The H200 NVL scores 334,891 versus 76,904 for the RX 6650M XT, a delta of 335.5 percent.

Q: What is the memory capacity difference?

A: The H200 NVL has 141 GB of HBM3e, while the RX 6650M XT has 8 GB of GDDR6. That is 17.6 times more capacity.

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

A: Yes, it has 32 ray tracing cores. The H200 NVL has no RT cores listed, but it has 528 tensor cores.

Q: Which GPU has higher pixel rate?

A: The RX 6650M XT has a pixel rate of 154.6 GPixel/s, compared to the H200 NVL's 42.84 GPixel/s.

Q: What is the transistor density difference?

A: The H200 NVL has 98.3 million transistors per mm² on a 5 nm process, while the RX 6650M XT has 46.7 million per mm² on a 7 nm process.

Q: What is the power draw for each card?

A: The H200 NVL has a TDP of 600 W, while the RX 6650M XT is rated at 120 W.

Where Each One Wins

The H200 NVL wins in every compute-heavy category in the recorded data. It has a higher OpenCL score, more shading units (16,896 versus 2,048), more TMUs (528 versus 128), more tensor cores (528 versus none), higher FP32 (60.32 TFLOPS versus 9.896 TFLOPS), higher FP16 (120.6 TFLOPS versus 19.79 TFLOPS), higher texture rate (942.5 GTexel/s versus 309.2 GTexel/s), more memory bandwidth (4.89 TB/s versus 256.0 GB/s), a wider memory bus (6144 bit versus 128 bit), and a larger transistor count (80,000 million versus 11,060 million). The H200 NVL is also 5.3 percent ahead of the AMD Instinct MI300X, which is another server accelerator, and only 3.1 percent behind the NVIDIA B200. This card is designed to win in data center AI training, large-scale inference, and scientific simulation.

The RX 6650M XT wins in specific niche categories. It has a higher boost clock (2416 MHz versus 1785 MHz), a higher base clock (2068 MHz versus 1365 MHz), a higher game clock (2162 MHz, which the H200 NVL does not list), a higher pixel rate (154.6 GPixel/s versus 42.84 GPixel/s), and more ROPs (64 versus 24). It also supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, while the H200 NVL lists N/A for all consumer APIs. The RX 6650M XT has a lower TDP (120 W versus 600 W), no power connectors, and an IGP form factor, making it suitable for compact or mobile systems. It is also 1 percent behind the RTX 5090 D and 2.6 percent behind the RX 6850M XT, so it is competitive within its own mobile tier.

Specification Differences

The two cards differ in nearly every measurable specification. The H200 NVL uses a 5 nm process, while the RX 6650M XT uses 7 nm. Transistors are 80,000 million versus 11,060 million. Die size is 814 mm² versus 237 mm². Transistor density is 98.3M per mm² versus 46.7M per mm². Base clock is 1365 MHz versus 2068 MHz. Boost clock is 1785 MHz versus 2416 MHz. The H200 NVL has no game clock listed; the RX 6650M XT has 2162 MHz. Memory clock is 1593 MHz with 6.4 Gbps effective for the H200 NVL, versus 2000 MHz with 16 Gbps effective for the AMD card. Memory size is 141 GB versus 8 GB. Memory type is HBM3e versus GDDR6. Bus width is 6144 bit versus 128 bit. Bandwidth is 4.89 TB/s versus 256.0 GB/s. Shading units are 16,896 versus 2,048. TMUs are 528 versus 128. ROPs are 24 versus 64. RT cores are not listed for the H200 NVL, but the RX 6650M XT has 32. Tensor cores are 528 for the H200 NVL, while the RX 6650M XT has none. Pixel rate is 42.84 GPixel/s versus 154.6 GPixel/s. Texture rate is 942.5 GTexel/s versus 309.2 GTexel/s. FP32 is 60.32 TFLOPS versus 9.896 TFLOPS. FP16 is 120.6 TFLOPS versus 19.79 TFLOPS. TDP is 600 W versus 120 W. Slot width is dual-slot versus IGP. Power connectors are 8-pin EPS versus none. Suggested PSU is 1000 W versus null. Bus interface is PCIe 5.0 x16 versus PCIe 4.0 x8. Display outputs are "No outputs" versus "Portable Device Dependent". DirectX, OpenGL, and Vulkan are all N/A for the H200 NVL, while the RX 6650M XT supports 12 Ultimate, 4.6, and 1.4, respectively. Dimensions are 267 mm by 111 mm for the H200 NVL, with no dimensions listed for the AMD card. Production status is Active versus End-of-life. Release date is 2024-11-17 versus 2022-01-03. The H200 NVL's predecessor is Server Ada and successor is Server Blackwell; the RX 6650M XT's predecessor is Polaris Mobile and it has no listed successor.