NVIDIA B200 SXM6 vs NVIDIA RTX PRO 4500 Blackwell Server Comparison

FAQ

Q: What are the core architectural differences between the NVIDIA B200 SXM6 and the NVIDIA RTX PRO 4500 Blackwell Server?

A: The B200 SXM6 uses the GB100 chip with 208,000 million transistors on a 1628 mm² die, while the RTX PRO 4500 uses the GB203 chip with 45,600 million transistors on a 378 mm² die. Both are built on a 5 nm process at TSMC, but the B200 has a transistor density of 127.8M/mm² versus 120.6M/mm² for the RTX PRO 4500.

Q: How do the memory configurations compare between these two server GPUs?

A: The B200 SXM6 features 180 GB of HBM3e memory on an 8192-bit bus with 8.19 TB/s bandwidth. The RTX PRO 4500 has 32 GB of GDDR7 memory on a 256-bit bus with 800.3 GB/s bandwidth. The memory clock differs as well: 2000 MHz (8 Gbps effective) for the B200 versus 1563 MHz (25 Gbps effective) for the RTX PRO 4500.

Q: Which GPU has higher clock speeds?

A: The RTX PRO 4500 runs at a 1215 MHz base clock and 2415 MHz boost clock. The B200 SXM6 has a much lower 120 MHz base clock and an 1830 MHz boost clock. The RTX PRO 4500 delivers significantly higher clock rates in both base and boost conditions.

Q: What are the power requirements for each card?

A: The B200 SXM6 has a TDP of 1000 W with a suggested PSU of 1400 W. The RTX PRO 4500 has a TDP of 165 W with a suggested PSU of 450 W. The B200 consumes substantially more power, reflecting its larger compute and memory footprint.

Q: Do these GPUs support different PCIe generations?

A: Yes. The B200 SXM6 uses PCIe 6.0 x16, while the RTX PRO 4500 uses PCIe 5.0 x16. The B200 supports the newer bus standard.

Q: What is the physical form factor of each card?

A: The B200 SXM6 is an SXM Module with no specified dimensions. The RTX PRO 4500 is a single-slot card measuring 267 mm in length, 111 mm in height, and 40 mm in width. The RTX PRO 4500 uses a 1x 16-pin power connector.

Architecture Differences

The two GPUs share the Blackwell architecture family but differ in implementation. The B200 SXM6 uses the GB100 chip, which is the larger and more complex design. It packs 208,000 million transistors into a 1628 mm² die, reaching a transistor density of 127.8M/mm². The RTX PRO 4500 uses the GB203 chip with 45,600 million transistors on a 378 mm² die, for a density of 120.6M/mm². Both are fabricated by TSMC on a 5 nm process, but the B200 clearly targets maximum compute throughput and memory capacity, while the RTX PRO 4500 aims for efficiency and manageable power draw in a single-slot form factor.

The B200 SXM6 has 18,944 shading units, 592 TMUs, and 24 ROPs. It also carries 592 tensor cores. The RTX PRO 4500 has 10,496 shading units, 328 TMUs, and 112 ROPs, along with 82 RT cores and 328 tensor cores. The B200 does not list RT cores, while the RTX PRO 4500 explicitly includes them. The B200's low ROP count (24) contrasts sharply with the RTX PRO 4500's 112 ROPs, which affects pixel throughput significantly.

Memory architecture diverges completely. The B200 uses HBM3e with 180 GB capacity, an 8192-bit bus, and 8.19 TB/s bandwidth. The RTX PRO 4500 uses GDDR7 with 32 GB capacity, a 256-bit bus, and 800.3 GB/s bandwidth. This gives the B200 over ten times the memory bandwidth and over five times the capacity. The memory clock also differs: the B200 runs at 2000 MHz (8 Gbps effective), while the RTX PRO 4500 runs at 1563 MHz (25 Gbps effective). The higher effective data rate per pin on the RTX PRO 4500 reflects the newer GDDR7 technology, but the B200's wide bus dominates overall bandwidth.

Both chips are listed under the "Server Blackwell (Bxx)" generation. The B200 is described as "Blackwell" while the RTX PRO 4500 is "Blackwell 2.0," indicating a revision within the same family. The B200 has a release date of 2024-10-31, while the RTX PRO 4500 has a release date of 2026-03-16, placing the RTX PRO 4500 as a later release. Both list "Server Hopper" as predecessor and "Server Rubin" as successor.

The B200 SXM6 is an SXM Module with no display outputs and no API support (DirectX, OpenGL, Vulkan all listed as N/A). The RTX PRO 4500 is a single-slot card with no display outputs but supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. This makes the RTX PRO 4500 more versatile for software environments that rely on standard graphics APIs, while the B200 is purely a compute accelerator.

Head-to-Head Benchmarks

The recorded data shows no direct benchmark scores for either GPU. Both have empty benchmark arrays, an average benchmark score of 0, and a percentile ranking of 50 among all GPUs. The head-to-head benchmark list is empty, and the win counts are zero for both. This means the database currently lacks measured performance results for these two server accelerators. However, the specification data provides a basis for comparing their theoretical capabilities.

The B200 SXM6 delivers 69.34 TFLOPS FP32 and 69.34 TFLOPS FP16 (1:1). The RTX PRO 4500 delivers 50.70 TFLOPS FP32 and 50.70 TFLOPS FP16 (1:1). This puts the B200 approximately 37% ahead in raw FP32 compute, a meaningful gap for workloads that scale with shading unit count. The B200 has 18,944 shading units versus 10,496 for the RTX PRO 4500, which explains the higher throughput despite the B200's lower clock speeds.

Pixel rate heavily favors the RTX PRO 4500. The B200 achieves 43.92 GPixel/s, while the RTX PRO 4500 reaches 270.5 GPixel/s, roughly six times higher. This stems from the RTX PRO 4500's 112 ROPs versus only 24 on the B200, plus its higher boost clock. Texture rate favors the B200 at 1,083.4 GTexel/s versus 792.1 GTexel/s for the RTX PRO 4500, a 37% advantage driven by the B200's 592 TMUs.

Memory bandwidth is the clearest differentiator. The B200's 8.19 TB/s dwarfs the RTX PRO 4500's 800.3 GB/s, a tenfold gap. For memory-bound workloads such as large model inference or high-resolution data processing, the B200 holds a decisive edge. The RTX PRO 4500's GDDR7 memory operates at a higher effective data rate per pin (25 Gbps versus 8 Gbps), but the B200's 8192-bit bus width overwhelms that advantage.

Clock speeds favor the RTX PRO 4500. Its 1215 MHz base and 2415 MHz boost clocks are substantially higher than the B200's 120 MHz base and 1830 MHz boost. This allows the RTX PRO 4500 to execute latency-sensitive tasks more quickly per instruction, though the B200 compensates with more compute units.

Power efficiency is not directly recorded, but the TDP figures are stark. The B200 draws 1000 W while the RTX PRO 4500 draws 165 W. The RTX PRO 4500 delivers 50.70 TFLOPS FP32 at 165 W, which is roughly 0.307 TFLOPS per watt. The B200 delivers 69.34 TFLOPS at 1000 W, roughly 0.069 TFLOPS per watt. The RTX PRO 4500 is over four times more efficient by this simple calculation, making it far better suited for power-constrained environments.

Specification Differences

| Specification | NVIDIA B200 SXM6 | NVIDIA RTX PRO 4500 Blackwell Server |

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

| Chip | GB100 | GB203 |

| Architecture | Blackwell | Blackwell 2.0 |

| Transistors | 208,000 million | 45,600 million |

| Die Size | 1628 mm² | 378 mm² |

| Transistor Density | 127.8M / mm² | 120.6M / mm² |

| Base Clock | 120 MHz | 1215 MHz |

| Boost Clock | 1830 MHz | 2415 MHz |

| Memory Size | 180 GB | 32 GB |

| Memory Type | HBM3e | GDDR7 |

| Memory Bus Width | 8192 bit | 256 bit |

| Memory Bandwidth | 8.19 TB/s | 800.3 GB/s |

| Memory Clock | 2000 MHz 8 Gbps effective | 1563 MHz 25 Gbps effective |

| Shading Units | 18944 | 10496 |

| TMUs | 592 | 328 |

| ROPs | 24 | 112 |

| RT Cores | Not listed | 82 |

| Tensor Cores | 592 | 328 |

| Pixel Rate | 43.92 GPixel/s | 270.5 GPixel/s |

| Texture Rate | 1,083.4 GTexel/s | 792.1 GTexel/s |

| FP32 | 69.34 TFLOPS | 50.70 TFLOPS |

| FP16 | 69.34 TFLOPS (1:1) | 50.70 TFLOPS (1:1) |

| TDP | 1000 W | 165 W |

| Slot Width | SXM Module | Single-slot |

| Power Connectors | Not listed | 1x 16-pin |

| Suggested PSU | 1400 W | 450 W |

| Bus Interface | PCIe 6.0 x16 | PCIe 5.0 x16 |

| Display Outputs | No outputs | No outputs |

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

| OpenGL | N/A | 4.6 |

| Vulkan | N/A | 1.4 |

| Dimensions | Not listed | 267 mm x 111 mm x 40 mm |

| Release Date | 2024-10-31 | 2026-03-16 |

| Launch MSRP | 34,999 USD | Not listed |

The Verdict

The data indicates two distinct design philosophies within the same Blackwell generation. The B200 SXM6 is built for maximum memory capacity and raw compute throughput. Its 180 GB HBM3e pool and 8.19 TB/s bandwidth are unmatched by the RTX PRO 4500, and its 69.34 TFLOPS FP32 output leads by a wide margin. The B200 also uses PCIe 6.0, a newer bus standard, and carries a launch MSRP of 34,999 USD.

The RTX PRO 4500 counters with efficiency and rasterization capabilities. Its 165 W TDP is a fraction of the B200's 1000 W, and its 270.5 GPixel/s pixel rate is far higher due to the 112 ROPs. It also supports standard graphics APIs, which the B200 lacks entirely. The RTX PRO 4500's higher base and boost clocks suggest better per-thread performance in latency-bound scenarios.

For workloads that demand enormous memory capacity, such as large-scale AI model training or inference with massive parameter sets, the B200 SXM6 is the clear choice from the recorded specifications. Its 180 GB capacity and 8.19 TB/s bandwidth provide headroom that the RTX PRO 4500 cannot approach. The B200 also offers more shading units, TMUs, and tensor cores, making it the stronger general-purpose compute accelerator.

For environments where power draw is a constraint, the RTX PRO 4500 is the practical option. Its 165 W TDP fits into a single-slot form factor, requires only a 450 W suggested PSU, and uses a single 16-pin connector. The B200's 1000 W TDP and 1400 W suggested PSU demand substantial infrastructure. The RTX PRO 4500 also provides API support and a much higher pixel rate, making it more suitable for graphics-oriented server tasks.

The release timeline also matters. The B200 launched on 2024-10-31, while the RTX PRO 4500 launched on 2026-03-16. The RTX PRO 4500 represents a later iteration of Blackwell, and its higher clock speeds and newer GDDR7 memory reflect that. However, the B200's sheer scale in memory and compute remains unmatched in the data.

Where Each One Wins

The B200 SXM6 wins in memory capacity, memory bandwidth, raw compute throughput, and texture processing. Its 180 GB HBM3e and 8.19 TB/s bandwidth make it superior for datasets that exceed 32 GB, which would spill out of the RTX PRO 4500's memory. The B200's 69.34 TFLOPS FP32 and FP16 output, along with 592 tensor cores, position it for dense compute workloads such as deep learning training or scientific simulations. Its 1,083.4 GTexel/s texture rate also exceeds the RTX PRO 4500, aiding texture-heavy compute tasks.

The B200 also wins in transistor count and die size, indicating a more complex and capable silicon design. Its PCIe 6.0 interface provides higher potential host bandwidth compared to the RTX PRO 4500's PCIe 5.0. The B200's 127.8M/mm² transistor density is slightly higher, suggesting a more compact logic layout.

The RTX PRO 4500 wins in pixel rate, clock speeds, ROP count, power efficiency, and API support. Its 270.5 GPixel/s pixel rate, driven by 112 ROPs and a 2415 MHz boost clock, is six times higher than the B200's. This makes it better suited for rasterization-heavy tasks. The RTX PRO 4500's 1215 MHz base clock is ten times higher than the B200's 120 MHz, and its 2415 MHz boost outpaces the B200's 1830 MHz, indicating faster per-core execution.

The RTX PRO 4500 also wins in physical integration. Its single-slot design with defined dimensions (267 mm length, 111 mm height, 40 mm width) and 165 W TDP allow deployment in denser server configurations. The B200's SXM Module form factor requires specialized chassis support. The RTX PRO 4500's support for DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4 opens software compatibility that the B200 cannot offer, as the B200 lists N/A for all three APIs.

In summary, the B200 SXM6 dominates in memory-bound and compute-heavy scenarios, while the RTX PRO 4500 leads in efficiency, rasterization, and software compatibility. The choice depends on whether the workload prioritizes massive memory and throughput or lower power draw and graphics API support. The recorded data provides no benchmark scores to settle this trade-off empirically, so the specifications must guide the decision.