AMD Radeon RX 7900M vs NVIDIA B200 SXM6 Comparison

The Verdict

The AMD Radeon RX 7900M and NVIDIA B200 SXM6 are fundamentally different products with different intended roles. The RX 7900M is a mobile graphics solution from the Radeon RX 7000 series, built on the Navi 31 chip with RDNA 3.0 architecture. The B200 SXM6 is a server accelerator from the Server Blackwell generation, built on the GB100 chip with Blackwell architecture. The data shows no benchmark overlap between them; the RX 7900M has recorded benchmark scores while the B200 SXM6 has none. The RX 7900M sits at the 94th percentile among all GPUs in the database, with an average benchmark score of 97,487. The B200 SXM6 sits at the 50th percentile with an average benchmark score of 0, indicating no recorded measurements. The RX 7900M is suitable for portable, DirectX 12 Ultimate workloads with its 16 GB GDDR6 memory and 180 W power envelope. The B200 SXM6 targets server environments, offering 180 GB of HBM3e memory, 592 tensor cores, and a 1000 W power draw, with no display outputs and no DirectX, OpenGL, or Vulkan API support. Users requiring a mobile GPU with active graphics APIs should select the RX 7900M. Users requiring a high-memory server accelerator with tensor core throughput should select the B200 SXM6.

Architecture Differences

The RX 7900M uses the Navi 31 chip on a 5 nm TSMC process, with 57,700 million transistors on a 529 mm² die, yielding a transistor density of 109.1 million per mm². The B200 SXM6 uses the GB100 chip also on a 5 nm TSMC process, with 208,000 million transistors on a 1628 mm² die, yielding a transistor density of 127.8 million per mm². The B200 SXM6 has a significantly larger die and over three times the transistor count.

The RX 7900M features 4,608 shading units, 288 texture mapping units, and 192 render output units, with 72 ray tracing cores. The B200 SXM6 features 18,944 shading units, 592 texture mapping units, and only 24 render output units, with 592 tensor cores. The shading unit count for the B200 SXM6 is roughly four times that of the RX 7900M. The render output unit count is drastically lower on the B200 SXM6, which reflects its compute-oriented design rather than rasterization focus.

Memory configurations differ substantially. The RX 7900M uses 16 GB of GDDR6 memory on a 256-bit bus, delivering 576.0 GB/s of bandwidth. The B200 SXM6 uses 180 GB of HBM3e memory on an 8192-bit bus, delivering 8.19 TB/s of bandwidth. The B200 SXM6 has more than an order of magnitude higher memory bandwidth and more than ten times the memory capacity.

Clock speeds also diverge. The RX 7900M has a base clock of 1825 MHz and a boost clock of 2090 MHz, with memory at 2250 MHz or 18 Gbps effective. The B200 SXM6 has a base clock of 120 MHz and a boost clock of 1830 MHz, with memory at 2000 MHz or 8 Gbps effective. The RX 7900M has a higher base and boost clock, while the B200 SXM6 relies on its massive parallel width and memory bandwidth.

Compute rates show the B200 SXM6 ahead in raw FP32 and FP16. The RX 7900M delivers 38.52 TFLOPS FP32 and 77.05 TFLOPS FP16 (2:1). The B200 SXM6 delivers 69.34 TFLOPS FP32 and 69.34 TFLOPS FP16 (1:1). The B200 SXM6 is about 80% ahead in FP32, but the RX 7900M is about 11% ahead in FP16. Pixel and texture rates favor the RX 7900M for pixel fill at 401.3 GPixel/s versus 43.92 GPixel/s, but the B200 SXM6 leads in texture fill at 1,083.4 GTexel/s versus 601.9 GTexel/s.

Power and form factor differ completely. The RX 7900M has a TDP of 180 W, uses an IGP slot width, has no power connectors, and has portable device dependent display outputs. The B200 SXM6 has a TDP of 1000 W, uses an SXM Module slot width, has a suggested PSU of 1400 W, and has no display outputs. The B200 SXM6 uses PCIe 6.0 x16 while the RX 7900M uses PCIe 4.0 x16. The RX 7900M supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The B200 SXM6 has no API support listed for DirectX, OpenGL, or Vulkan.

Release dates place the RX 7900M in October 2023 and the B200 SXM6 in October 2024. The RX 7900M has a predecessor of Polaris Mobile and no successor. The B200 SXM6 has a predecessor of Server Hopper and a successor of Server Rubin. The B200 SXM6 has a launch MSRP of 34,999 USD.

Head-to-Head Benchmarks

The database contains no head-to-head benchmark results between the RX 7900M and B200 SXM6. The RX 7900M has three recorded benchmark scores. In 3DMark Steel Nomad DX12, it scores 4,201. In GeekBench OpenCL, it scores 129,499. In GeekBench Vulkan, it scores 158,760. The B200 SXM6 has no recorded benchmark scores in any test, resulting in an average benchmark score of 0.

The RX 7900M's nearest rivals in the database provide context for its performance. The AMD Radeon Pro VII has an average score of 97,131, which is 0.4% higher than the RX 7900M. The NVIDIA Quadro RTX 6000 has an average score of 101,872, which is 4.3% higher than the RX 7900M. The AMD Radeon Instinct MI60 has an average score of 92,466, which is 5.4% lower than the RX 7900M. The NVIDIA RTX A4500 has an average score of 91,671, which is 6.3% lower than the RX 7900M. These deltas indicate the RX 7900M sits in a competitive range, slightly behind the Quadro RTX 6000 but ahead of the Instinct MI60 and RTX A4500.

The B200 SXM6 has no nearest rivals listed, and its percentile of 50 with a zero average score indicates it has not been measured in the database's benchmark suite. Without recorded benchmarks, no direct performance comparison between the two cards can be made. The only comparative statements come from architectural specifications, which show the B200 SXM6 with higher FP32 throughput, higher memory bandwidth, and more shading units, while the RX 7900M has higher pixel rate, higher base and boost clocks, and active graphics API support.

FAQ

Q: Which GPU has more shading units?

A: The NVIDIA B200 SXM6 has 18,944 shading units, while the AMD Radeon RX 7900M has 4,608 shading units.

Q: What is the memory bandwidth difference?

A: The B200 SXM6 delivers 8.19 TB/s of bandwidth from 180 GB of HBM3e memory on an 8192-bit bus. The RX 7900M delivers 576.0 GB/s from 16 GB of GDDR6 memory on a 256-bit bus.

Q: Does the B200 SXM6 support graphics APIs?

A: No. The B200 SXM6 has no DirectX, OpenGL, or Vulkan support. The RX 7900M supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Q: Which GPU has a higher FP32 compute rate?

A: The B200 SXM6 has 69.34 TFLOPS FP32, which is higher than the RX 7900M's 38.52 TFLOPS FP32. The B200 SXM6 is about 80% ahead in this metric.

Q: What are the power requirements?

A: The RX 7900M has a TDP of 180 W and no power connectors. The B200 SXM6 has a TDP of 1000 W and a suggested PSU of 1400 W.

Q: How does the RX 7900M compare to its nearest rivals?

A: The RX 7900M has an average benchmark score of 97,487. The AMD Radeon Pro VII is 0.4% ahead, the NVIDIA Quadro RTX 6000 is 4.3% ahead, the AMD Radeon Instinct MI60 is 5.4% behind, and the NVIDIA RTX A4500 is 6.3% behind.

Where Each One Wins

The AMD Radeon RX 7900M wins in scenarios requiring active graphics rendering. It supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, making it functional for client-side graphics workloads. Its pixel rate of 401.3 GPixel/s is substantially higher than the B200 SXM6's 43.92 GPixel/s, indicating stronger rasterization throughput. Its FP16 performance of 77.05 TFLOPS exceeds the B200 SXM6's 69.34 TFLOPS, giving it an edge in FP16 compute tasks. Its 180 W TDP and IGP form factor make it deployable in portable systems, with display outputs described as portable device dependent. Its release in October 2023 and active production status indicate current availability for mobile graphics applications.

The NVIDIA B200 SXM6 wins in scenarios requiring massive memory capacity and bandwidth. Its 180 GB of HBM3e memory with 8.19 TB/s bandwidth far exceeds the RX 7900M's 16 GB and 576.0 GB/s. Its 592 tensor cores provide dedicated tensor processing hardware, absent in the RX 7900M. Its FP32 throughput of 69.34 TFLOPS is roughly 80% higher than the RX 7900M's 38.52 TFLOPS. Its texture rate of 1,083.4 GTexel/s is about 80% higher than the RX 7900M's 601.9 GTexel/s. Its shading unit count of 18,944 is more than four times the RX 7900M's 4,608. Its 208,000 million transistors and 1628 mm² die indicate a design focused on compute density. Its PCIe 6.0 x16 interface provides a newer bus generation. Its SXM Module form factor and 1000 W TDP target server racks rather than portable devices. Its release in October 2024 and successor of Server Rubin indicate a current-generation server product.

The database shows no benchmark overlap, so win counts are zero for both. The RX 7900M's recorded scores place it at the 94th percentile among all GPUs, while the B200 SXM6 has no recorded scores and sits at the 50th percentile by default. The RX 7900M's average benchmark score of 97,487 is derived from three tests, while the B200 SXM6's average of 0 reflects an absence of measurements. For users with graphics API requirements, the RX 7900M is the only option with DirectX and Vulkan support. For users with tensor core and high memory bandwidth requirements, the B200 SXM6 provides dedicated hardware that the RX 7900M lacks. Each card wins in its respective domain: the RX 7900M in mobile graphics with active API support, and the B200 SXM6 in server compute with high memory capacity and tensor throughput.