AMD Radeon 820M vs NVIDIA B200 SXM6 Comparison

The Verdict

The data in this comparison presents two entirely different GPU classes. The AMD Radeon 820M is a 15 W integrated graphics processor for mobile devices, built on RDNA 3.5 and designed to share system memory. The NVIDIA B200 SXM6 is a 1000 W server accelerator with 180 GB of dedicated HBM3e memory, 18,944 shading units, and a launch MSRP of 34,999 USD. They do not compete in any workload segment. The database shows no overlapping use cases, no shared platform compatibility, and no comparable performance metrics.

The Radeon 820M belongs in thin-and-light portable systems where power draw is capped at 15 W. Its integrated design uses system shared memory, has no power connectors, and outputs to portable device dependent displays. The B200 SXM6 is a SXM module with no display outputs at all, a suggested PSU of 1400 W, and a PCIe 6.0 x16 interface. The choice between them is dictated by platform, not preference. Anyone selecting a GPU for a mobile IGP role chooses the 820M. Anyone assembling a server-class compute node chooses the B200 SXM6. The data does not support any other interpretation.

Where Each One Wins

The Radeon 820M wins in power efficiency and integration. It draws 15 W against the B200's 1000 W, a 66.7x difference in rated power consumption. It fits as an IGP, uses no power connectors, and relies on system shared memory, which makes it appropriate for compact portable devices. Its API support includes DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The B200 SXM6 lists no API support at all in the database, with DirectX, OpenGL, and Vulkan all marked as N/A.

The B200 SXM6 wins in raw compute, memory capacity, and bandwidth. It delivers 69.34 TFLOPS FP32 performance against the 820M's 716.8 GFLOPS, a 96.7x difference. Its 180 GB HBM3e memory operates over an 8192 bit bus with 8.19 TB/s bandwidth. The Radeon 820M has no dedicated memory, with capacity, type, bus width, and bandwidth all marked as system dependent. The B200 also carries 592 tensor cores and 592 TMUs, while the 820M has no tensor core field populated and only 8 TMUs.

Architecture Differences

The Radeon 820M uses the Krackan Point 2 chip on a 4 nm TSMC process, with RDNA 3.5 architecture from the Navi III IGP generation (Strix Point Mobile). The B200 SXM6 uses the GB100 chip on a 5 nm TSMC process, with Blackwell architecture from the Server Blackwell (Bxx) generation. The process node differs: 4 nm for AMD, 5 nm for NVIDIA.

Transistor data is only recorded for the B200: 208,000 million transistors on a 1628 mm² die, giving a transistor density of 127.8M per mm². The Radeon 820M's transistor count and die size are unknown in the database. The B200's predecessor is listed as Server Hopper and its successor as Server Rubin. The Radeon 820M's predecessor is Navi II IGP, with no successor recorded.

The B200's memory subsystem is entirely separate from the host: 180 GB HBM3e, 8192 bit bus, 8.19 TB/s bandwidth, and a memory clock of 2000 MHz with 8 Gbps effective speed. The Radeon 820M's memory is system shared, with the memory clock listed as system shared and bandwidth as system dependent. The B200 also has 24 ROPs and a pixel rate of 43.92 GPixel/s, versus the 820M's 4 ROPs and 11.20 GPixel/s.

The B200 has 18,944 shading units and a texture rate of 1,083.4 GTexel/s. The Radeon 820M has 128 shading units and a texture rate of 22.40 GTexel/s. The B200's boost clock is 1830 MHz with a base clock of 120 MHz. The 820M's boost clock is 2800 MHz with a base clock of 400 MHz. The higher clock speeds on the AMD part do not compensate for the massive difference in shading unit count.

The bus interface differs: PCIe 4.0 x8 for the Radeon 820M, PCIe 6.0 x16 for the B200 SXM6. The B200 has no display outputs, while the 820M is marked as portable device dependent. The B200's slot width is SXM Module, the 820M's is IGP. Power connectors are none for the AMD part, and the B200 lists a suggested PSU of 1400 W.

FAQ

Q: Which GPU has higher FP32 compute performance?

A: The NVIDIA B200 SXM6 delivers 69.34 TFLOPS, which is 96.7x higher than the AMD Radeon 820M's 716.8 GFLOPS.

Q: What memory configurations do these two GPUs use?

A: The B200 SXM6 has 180 GB of HBM3e on an 8192 bit bus with 8.19 TB/s bandwidth. The Radeon 820M uses system shared memory, with capacity, type, bus width, and bandwidth all system dependent.

Q: Do both GPUs support the same graphics APIs?

A: No. The Radeon 820M supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The B200 SXM6 lists N/A for DirectX, OpenGL, and Vulkan.

Q: What are the power requirements for each?

A: The Radeon 820M has a TDP of 15 W and uses no power connectors. The B200 SXM6 has a TDP of 1000 W and a suggested PSU of 1400 W.

Q: Which GPU has tensor cores?

A: The B200 SXM6 has 592 tensor cores. The Radeon 820M's tensor core field is not populated in the database.

Q: What are the release dates?

A: The B200 SXM6 was released on 2024-10-31, and the Radeon 820M on 2025-02-28.

Head-to-Head Benchmarks

The database records no shared benchmark scores for these two parts. Each has an empty benchmark array, zero average benchmark score, a 50th percentile versus all GPUs, and no nearest rivals. Direct numerical comparison must therefore rely on the recorded specification data.

The largest single gap is in shading units. The B200 SXM6 has 18,944 shading units against the 820M's 128, a 148x difference. TMUs follow the same pattern: 592 versus 8, a 74x difference. ROPs are 24 versus 4, a 6x difference. The B200's texture rate of 1,083.4 GTexel/s is 48.4x higher than the 820M's 22.40 GTexel/s. Pixel rate favors the B200 at 43.92 GPixel/s versus 11.20 GPixel/s, a 3.9x difference.

FP32 throughput shows the B200 at 69.34 TFLOPS versus the 820M's 716.8 GFLOPS. Both GPUs list FP16 at the same figure as FP32 with a 1:1 ratio, meaning the B200's FP16 is also 69.34 TFLOPS and the 820M's is 716.8 GFLOPS. The B200 also records 592 tensor cores, a capability the 820M does not list.

Memory bandwidth is the most extreme divergence. The B200's 8.19 TB/s is a fixed hardware specification. The 820M's bandwidth is system dependent, meaning it cannot be stated as a fixed number. The B200's 180 GB capacity is fixed; the 820M's is shared and variable. The B200's 8192 bit bus is fixed; the 820M's is system shared.

Clock speeds tell a different story. The Radeon 820M boosts to 2800 MHz, which is 53% higher than the B200's 1830 MHz boost. The 820M also has a higher base clock at 400 MHz versus 120 MHz. This clock advantage is irrelevant to the compute outcome, as the B200's shading unit count and memory subsystem dominate.

Power draw is another clean divide. The 820M's 15 W TDP is 1.5% of the B200's 1000 W. The B200 requires a 1400 W suggested PSU. The 820M needs none. Process technology slightly favors AMD: 4 nm versus 5 nm, both at TSMC.

Specification Differences

The following fields differ between the two parts. The Radeon 820M uses the Krackan Point 2 chip, RDNA 3.5 architecture, Navi III IGP generation, and a 4 nm process. The B200 SXM6 uses the GB100 chip, Blackwell architecture, Server Blackwell generation, and a 5 nm process. Transistor count is unknown for the 820M and 208,000 million for the B200. Die size is unknown for the 820M and 1628 mm² for the B200. Transistor density is not listed for the 820M and is 127.8M per mm² for the B200.

Base clock is 400 MHz for the 820M and 120 MHz for the B200. Boost clock is 2800 MHz for the 820M and 1830 MHz for the B200. Memory clock is system shared for the 820M and 2000 MHz with 8 Gbps effective for the B200. Memory size is system shared for the 820M and 180 GB for the B200. Memory type is system shared versus HBM3e. Bus width is system shared versus 8192 bit. Bandwidth is system dependent versus 8.19 TB/s.

Shading units are 128 versus 18,944. TMUs are 8 versus 592. ROPs are 4 versus 24. RT cores are 2 for the 820M and null for the B200. Tensor cores are null for the 820M and 592 for the B200. Pixel rate is 11.20 GPixel/s versus 43.92 GPixel/s. Texture rate is 22.40 GTexel/s versus 1,083.4 GTexel/s. FP32 is 716.8 GFLOPS versus 69.34 TFLOPS. FP16 is 716.8 GFLOPS (1:1) versus 69.34 TFLOPS (1:1).

TDP is 15 W versus 1000 W. Slot width is IGP versus SXM Module. Power connectors are none versus not listed. Suggested PSU is not listed for the 820M and 1400 W for the B200. Bus interface is PCIe 4.0 x8 versus PCIe 6.0 x16. Display outputs are portable device dependent versus no outputs. DirectX is 12 Ultimate (12_2) versus N/A. OpenGL is 4.6 versus N/A. Vulkan is 1.4 versus N/A. Production status is active for both. Release date is 2025-02-28 for the 820M and 2024-10-31 for the B200. Predecessor is Navi II IGP versus Server Hopper. Successor is null versus Server Rubin. Launch MSRP is not listed for the 820M and 34,999 USD for the B200.