NVIDIA H100 CNX vs NVIDIA RTX PRO 4500 Blackwell Server Comparison

Head-to-Head Benchmarks

The recorded data shows no direct benchmark results for either the NVIDIA H100 CNX or the NVIDIA RTX PRO 4500 Blackwell Server. Both entries carry an average benchmark score of zero, and their percentile rankings against all GPUs sit at 50 for each. The head-to-head benchmark list is empty, meaning no comparative performance measurements exist in the database for these two accelerators. Consequently, there are no exact performance deltas, no win counts, and no rival comparison scores to report. The absence of measured data means any attempt to quantify relative speed, throughput, or compute capability would be speculative rather than grounded in recorded results.

What the database does confirm is that both products are active production items from NVIDIA, but they occupy entirely different segments of the server accelerator market. The H100 CNX belongs to the Server Hopper generation, while the RTX PRO 4500 belongs to Server Blackwell. Without benchmark numbers, the analysis must rely on architectural specifications and feature sets rather than observed performance.

Architecture Differences

The H100 CNX uses the GH100 chip built on the Hopper architecture, fabricated by TSMC on a 5 nm process. It integrates 80,000 million transistors on a die size of 814 mm², yielding a transistor density of 98.3 million per square millimeter. The RTX PRO 4500 Blackwell Server uses the GB203 chip on the Blackwell 2.0 architecture, also from TSMC at 5 nm, but packs 45,600 million transistors onto a 378 mm² die, achieving a higher density of 120.6 million per square millimeter. The H100 CNX therefore carries nearly double the transistor count and more than double the die area, while the RTX PRO 4500 achieves better packing efficiency per square millimeter.

Clock behavior separates the two clearly. The H100 CNX runs a base clock of 690 MHz and a boost clock of 1845 MHz. The RTX PRO 4500 operates at a base of 1215 MHz and boosts to 2415 MHz, giving it substantially higher clock frequencies across the board. Memory architecture differs fundamentally: the H100 CNX uses 80 GB of HBM2e across a 5120-bit bus, delivering 2.04 TB/s of bandwidth, while the RTX PRO 4500 uses 32 GB of GDDR7 on a 256-bit bus, delivering 800.3 GB/s. The H100 CNX has nearly three times the memory capacity and 2.5 times the bandwidth, but the RTX PRO 4500 uses newer memory technology with a notably narrower bus.

Shader resources diverge as well. The H100 CNX contains 14,592 shading units, 456 texture mapping units, and 24 raster output units. The RTX PRO 4500 has 10,496 shading units, 328 TMUs, and 112 ROPs. The H100 CNX has more shaders and TMUs, but the RTX PRO 4500 has nearly five times the ROP count. Tensor core counts also differ: 456 on the H100 CNX versus 328 on the RTX PRO 4500. The RTX PRO 4500 includes 82 ray tracing cores, while the H100 CNX lists no RT core count in the database.

Compute throughput shows a mixed picture. The H100 CNX delivers 53.84 TFLOPS of FP32 performance and 215.4 TFLOPS of FP16 using a 4:1 ratio. The RTX PRO 4500 delivers 50.70 TFLOPS of FP32 and 50.70 TFLOPS of FP16 with a 1:1 ratio. The H100 CNX leads in FP32 by a narrow margin and dominates FP16 by a wide margin, but the RTX PRO 4500 maintains parity between its FP16 and FP32 rates, indicating a different execution strategy. Pixel and texture rates also differ: the H100 CNX hits 44.28 GPixel/s and 841.3 GTexel/s, while the RTX PRO 4500 reaches 270.5 GPixel/s and 792.1 GTexel/s. The RTX PRO 4500 is dramatically faster at pixel fill, while the H100 CNX has a slight edge in texture throughput.

Power and physical design separate the two further. The H100 CNX has a TDP of 350 W, is dual-slot, uses an 8-pin EPS power connector, and suggests a 750 W power supply. The RTX PRO 4500 has a TDP of 165 W, is single-slot, uses a single 16-pin connector, and suggests a 450 W power supply. Both are 267 mm long and 111 mm tall, but the RTX PRO 4500 has a recorded width of 40 mm, while the H100 CNX has no width listed. Both use PCIe 5.0 x16 interfaces and have no display outputs. The H100 CNX lists no API support data, while the RTX PRO 4500 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Where Each One Wins

Without benchmark scores, the wins must be inferred from architectural strengths recorded in the database. The H100 CNX wins decisively in memory capacity and bandwidth, offering 80 GB and 2.04 TB/s versus 32 GB and 800.3 GB/s on the RTX PRO 4500. Workloads that depend on holding large datasets close to the compute units, such as massive model inference or large-scale tensor operations, align with the H100 CNX. Its FP16 throughput of 215.4 TFLOPS dwarfs the RTX PRO 4500's 50.70 TFLOPS by a factor of over four, making the H100 CNX the stronger choice for mixed-precision training-style workloads. The H100 CNX also carries more transistors, a larger die, and more shading units, suggesting raw compute headroom for dense mathematical operations.

The RTX PRO 4500 wins in clock speed, pixel throughput, ROP count, and power efficiency. Its boost clock of 2415 MHz versus 1845 MHz gives it a frequency advantage of over 30 percent. Its pixel rate of 270.5 GPixel/s is more than six times that of the H100 CNX, and its 112 ROPs versus 24 indicate superior rasterization capability. The 165 W TDP versus 350 W means the RTX PRO 4500 delivers comparable FP32 performance (50.70 versus 53.84 TFLOPS) at less than half the power draw. The single-slot form factor and 450 W suggested power supply make it far easier to integrate into dense server configurations. The RTX PRO 4500 also brings ray tracing cores and a full API stack (DirectX 12 Ultimate, OpenGL 4.6, Vulkan 1.4), features absent from the H100 CNX record.

The generation gap matters. The H100 CNX released on 2023-03-20, while the RTX PRO 4500 has a release date of 2026-03-16. The RTX PRO 4500 lists Server Hopper as its predecessor and Server Rubin as its successor, placing it in the newer Blackwell lineage. The H100 CNX lists Server Ada as its predecessor and Server Blackwell as its successor, confirming it belongs to the older generation that the RTX PRO 4500 supersedes.

FAQ

Q: Which GPU has more memory bandwidth?

A: The NVIDIA H100 CNX, with 2.04 TB/s from 80 GB of HBM2e on a 5120-bit bus. The RTX PRO 4500 Blackwell Server has 800.3 GB/s from 32 GB of GDDR7 on a 256-bit bus.

Q: What are the FP32 compute figures for each?

A: The H100 CNX delivers 53.84 TFLOPS of FP32, while the RTX PRO 4500 delivers 50.70 TFLOPS. The H100 CNX leads by roughly 6 percent.

Q: Does the RTX PRO 4500 support ray tracing?

A: Yes, the RTX PRO 4500 includes 82 ray tracing cores. The H100 CNX has no RT core count listed in the database.

Q: How do the power requirements compare?

A: The H100 CNX has a TDP of 350 W and suggests a 750 W power supply. The RTX PRO 4500 has a TDP of 165 W and suggests a 450 W power supply.

Q: Which GPU uses newer memory technology?

A: The RTX PRO 4500 uses GDDR7 memory, while the H100 CNX uses HBM2e. The RTX PRO 4500 also has a newer architecture, Blackwell 2.0, versus Hopper on the H100 CNX.

Q: Are both GPUs the same physical size?

A: Both are 267 mm in length and 111 mm in height. The RTX PRO 4500 is single-slot with a width of 40 mm, while the H100 CNX is dual-slot with no width listed.

Specification Differences

| Specification | NVIDIA H100 CNX | NVIDIA RTX PRO 4500 Blackwell Server |

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

| Architecture | Hopper | Blackwell 2.0 |

| Generation | Server Hopper (Hxx) | Server Blackwell (Bxx) |

| Chip | GH100 | GB203 |

| Transistors | 80,000 million | 45,600 million |

| Die Size | 814 mm² | 378 mm² |

| Transistor Density | 98.3M / mm² | 120.6M / mm² |

| Base Clock | 690 MHz | 1215 MHz |

| Boost Clock | 1845 MHz | 2415 MHz |

| Memory Size | 80 GB | 32 GB |

| Memory Type | HBM2e | GDDR7 |

| Memory Bus Width | 5120 bit | 256 bit |

| Memory Bandwidth | 2.04 TB/s | 800.3 GB/s |

| Shading Units | 14592 | 10496 |

| TMUs | 456 | 328 |

| ROPs | 24 | 112 |

| RT Cores | None listed | 82 |

| Tensor Cores | 456 | 328 |

| Pixel Rate | 44.28 GPixel/s | 270.5 GPixel/s |

| Texture Rate | 841.3 GTexel/s | 792.1 GTexel/s |

| FP32 Performance | 53.84 TFLOPS | 50.70 TFLOPS |

| FP16 Performance | 215.4 TFLOPS (4:1) | 50.70 TFLOPS (1:1) |

| TDP | 350 W | 165 W |

| Slot Width | Dual-slot | Single-slot |

| Power Connectors | 8-pin EPS | 1x 16-pin |

| Suggested PSU | 750 W | 450 W |

| Width | Not listed | 40 mm |

| DirectX Support | Not listed | 12 Ultimate (12_2) |

| OpenGL Support | Not listed | 4.6 |

| Vulkan Support | Not listed | 1.4 |

| Release Date | 2023-03-20 | 2026-03-16 |

| Predecessor | Server Ada | Server Hopper |

| Successor | Server Blackwell | Server Rubin |

The Verdict

The data points to two distinct accelerators serving different server roles. The NVIDIA H100 CNX is the larger, more compute-dense part. Its 80 GB of HBM2e with 2.04 TB/s bandwidth, 456 tensor cores, and 215.4 TFLOPS of FP16 throughput make it suited for workloads that stress memory capacity and mixed-precision math. The 350 W TDP and dual-slot design indicate a high-power, high-throughput component intended for primary compute nodes.

The NVIDIA RTX PRO 4500 Blackwell Server is the newer, more efficient option. Its 165 W TDP, single-slot width, and 450 W suggested power supply allow for denser server packing. The 2415 MHz boost clock, 270.5 GPixel/s pixel rate, and 112 ROPs give it strong rasterization and fill-rate characteristics. The inclusion of ray tracing cores and full API support (DirectX 12 Ultimate, OpenGL 4.6, Vulkan 1.4) extends its applicability beyond pure compute into graphics-adjacent server tasks. Its FP32 performance of 50.70 TFLOPS nearly matches the H100 CNX at less than half the power envelope.

The H100 CNX wins where massive memory pools and extreme FP16 throughput are required. The RTX PRO 4500 wins where power efficiency, clock speed, pixel throughput, and a newer architecture with ray tracing matter more. Both are active production parts, but the RTX PRO 4500's 2026 release date and Blackwell 2.0 architecture place it in the successor generation. Users with workloads that fit within 32 GB of GDDR7 and require API-level graphics support should favor the RTX PRO 4500. Users needing 80 GB of HBM2e-class bandwidth and four times the FP16 rate should select the H100 CNX. The choice hinges on memory capacity, precision requirements, and power density priorities, all of which the database records clearly.