NVIDIA B200 SXM6 vs NVIDIA GeForce RTX 4090 Max-Q Comparison

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark results for the NVIDIA B200 SXM6 and the NVIDIA GeForce RTX 4090 Max-Q. Neither part has recorded benchmark scores in the database, and the wins tally stands at zero for both. This absence of measured data means the comparison must rely entirely on the specification sheets and architectural characteristics of the two products.

What the recorded data does provide is a stark contrast in raw computational throughput. The B200 SXM6 delivers 69.34 TFLOPS of FP32 compute, while the RTX 4090 Max-Q delivers 28.31 TFLOPS. That places the B200 SXM6 at approximately 2.45 times the FP32 throughput of the mobile GeForce part. The FP16 figures mirror this exactly, with both parts showing a 1:1 ratio between FP16 and FP32, so the B200 SXM6 again sits at 69.34 TFLOPS versus 28.31 TFLOPS for the RTX 4090 Max-Q.

Memory bandwidth tells a similar story of separation. The B200 SXM6 has 8.19 TB/s of bandwidth, while the RTX 4090 Max-Q has 576.0 GB/s. The server part therefore operates with roughly 14.2 times the memory bandwidth of the mobile part. This gap is consistent with the fundamental positioning of the two products: one is a server accelerator module, the other is an integrated graphics processor for portable devices.

Pixel throughput is one area where the RTX 4090 Max-Q actually leads. The mobile part outputs 163.0 GPixel/s, while the B200 SXM6 outputs 43.92 GPixel/s. That is a 3.7 times advantage for the GeForce part in pixel fill rate. Texture rate goes the other way, with the B200 SXM6 at 1,083.4 GTexel/s versus 442.3 GTexel/s for the RTX 4090 Max-Q, a 2.45 times lead for the server module.

Clock behavior also differs sharply. The B200 SXM6 has a base clock of 120 MHz and a boost clock of 1830 MHz. The RTX 4090 Max-Q starts at 930 MHz base and boosts to 1455 MHz. The mobile part runs a higher base clock by 810 MHz, but the server part has a higher boost clock by 375 MHz.

Where Each One Wins

The B200 SXM6 wins decisively in compute throughput and memory capacity. Its 180 GB of HBM3e memory dwarfs the 16 GB of GDDR6 on the RTX 4090 Max-Q, a factor of 11.25 times. The memory bus width of 8192 bit on the server part compares to 256 bit on the mobile part, a 32 times difference that explains the massive bandwidth gap. The shading unit count also favors the server part: 18,944 shading units versus 9,728, exactly double. Tensor cores number 592 on the B200 SXM6 versus 304 on the RTX 4090 Max-Q, and TMUs stand at 592 versus 304, again doubling.

The RTX 4090 Max-Q wins in areas tied to graphics output and rasterization. Its 112 ROPs compare to just 24 on the B200 SXM6, which explains the pixel rate advantage. The mobile part also has 76 ray tracing cores, while the B200 SXM6 lists none in the database record. The RTX 4090 Max-Q supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, while the B200 SXM6 has N/A for all three API categories. The B200 SXM6 has no display outputs, while the RTX 4090 Max-Q has outputs described as portable device dependent.

Power consumption separates the two completely. The B200 SXM6 carries a TDP of 1000 W and a suggested PSU of 1400 W. The RTX 4090 Max-Q has a TDP of 80 W, meaning the server part draws 12.5 times the power of the mobile part. The RTX 4090 Max-Q uses no power connectors, while the B200 SXM6 is an SXM Module form factor.

Architecture Differences

The two parts come from different NVIDIA generations. The B200 SXM6 uses the GB100 chip on Blackwell architecture, part of the Server Blackwell (Bxx) generation. The RTX 4090 Max-Q uses the AD103 chip on Ada Lovelace architecture, part of the GeForce 40 Mobile generation. Both are manufactured by TSMC on a 5 nm process, but the transistor counts diverge dramatically. The B200 SXM6 has 208,000 million transistors on a 1628 mm² die, giving a transistor density of 127.8 million per square millimeter. The RTX 4090 Max-Q has 45,900 million transistors on a 379 mm² die, with a density of 121.1 million per square millimeter. The server die is 4.3 times larger in area and contains 4.5 times as many transistors.

Memory technology differs at every level. The B200 SXM6 uses HBM3e with 180 GB capacity and an 8192 bit bus. The RTX 4090 Max-Q uses GDDR6 with 16 GB capacity and a 256 bit bus. The memory clocks also differ: the B200 SXM6 runs at 2000 MHz with 8 Gbps effective, while the RTX 4090 Max-Q runs at 2250 MHz with 18 Gbps effective. Despite the higher per-pin data rate on the mobile part, the server part achieves its bandwidth through the vastly wider bus.

The bus interface separates them as well. The B200 SXM6 uses PCIe 6.0 x16, while the RTX 4090 Max-Q uses PCIe 4.0 x16. The form factors reflect their intended environments: the B200 SXM6 is an SXM Module with no display outputs, and the RTX 4090 Max-Q is an IGP with portable device dependent outputs. The RTX 4090 Max-Q supports the full modern graphics API stack, while the B200 SXM6 lists no graphics API support.

Clock architecture also differs. The B200 SXM6 has a very low 120 MHz base clock, which suggests aggressive power management or a design that relies on boost behavior for performance. The RTX 4090 Max-Q has a higher 930 MHz base clock but a lower 1455 MHz boost clock. The B200 SXM6 boost clock of 1830 MHz is 375 MHz higher than the mobile part's boost clock.

FAQ

Q: Which GPU has higher FP32 compute performance?

A: The NVIDIA B200 SXM6 delivers 69.34 TFLOPS of FP32 compute, which is roughly 2.45 times the 28.31 TFLOPS of the NVIDIA GeForce RTX 4090 Max-Q.

Q: How do the memory capacities compare?

A: The B200 SXM6 has 180 GB of HBM3e memory, while the RTX 4090 Max-Q has 16 GB of GDDR6. The B200 SXM6 holds 11.25 times more memory.

Q: Which part has higher pixel fill rate?

A: The RTX 4090 Max-Q has a pixel rate of 163.0 GPixel/s, which is 3.7 times higher than the B200 SXM6's 43.92 GPixel/s.

Q: What graphics API support does each part have?

A: The RTX 4090 Max-Q 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: How much power does each part draw?

A: The B200 SXM6 has a TDP of 1000 W with a suggested PSU of 1400 W. The RTX 4090 Max-Q has a TDP of 80 W.

Q: What is the memory bandwidth difference?

A: The B200 SXM6 provides 8.19 TB/s of bandwidth, while the RTX 4090 Max-Q provides 576.0 GB/s. The server part has roughly 14.2 times the bandwidth.

Specification Differences

| Field | NVIDIA B200 SXM6 | NVIDIA GeForce RTX 4090 Max-Q |

|---|---|---|

| Architecture | Blackwell | Ada Lovelace |

| Generation | Server Blackwell (Bxx) | GeForce 40 Mobile |

| Chip | GB100 | AD103 |

| Transistors | 208,000 million | 45,900 million |

| Die Size | 1628 mm² | 379 mm² |

| Transistor Density | 127.8M / mm² | 121.1M / mm² |

| Base Clock | 120 MHz | 930 MHz |

| Boost Clock | 1830 MHz | 1455 MHz |

| Memory Clock | 2000 MHz, 8 Gbps effective | 2250 MHz, 18 Gbps effective |

| Memory Size | 180 GB | 16 GB |

| Memory Type | HBM3e | GDDR6 |

| Memory Bus Width | 8192 bit | 256 bit |

| Memory Bandwidth | 8.19 TB/s | 576.0 GB/s |

| Shading Units | 18,944 | 9,728 |

| TMUs | 592 | 304 |

| ROPs | 24 | 112 |

| RT Cores | N/A | 76 |

| Tensor Cores | 592 | 304 |

| Pixel Rate | 43.92 GPixel/s | 163.0 GPixel/s |

| Texture Rate | 1,083.4 GTexel/s | 442.3 GTexel/s |

| FP32 | 69.34 TFLOPS | 28.31 TFLOPS |

| FP16 | 69.34 TFLOPS (1:1) | 28.31 TFLOPS (1:1) |

| TDP | 1000 W | 80 W |

| Slot Width | SXM Module | IGP |

| Power Connectors | N/A | None |

| Suggested PSU | 1400 W | N/A |

| Bus Interface | PCIe 6.0 x16 | PCIe 4.0 x16 |

| Display Outputs | No outputs | Portable Device Dependent |

| DirectX | N/A | 12 Ultimate (12_2) |

| OpenGL | N/A | 4.6 |

| Vulkan | N/A | 1.4 |

| Release Date | 2024-10-31 | 2023-01-02 |

| Predecessor | Server Hopper | GeForce 30 Mobile |

| Successor | Server Rubin | GeForce 50 Mobile |

| Launch MSRP | 34,999 USD | N/A |