NVIDIA H20 vs NVIDIA RTX PRO 4500 Blackwell Workstation Comparison

Head-to-Head Benchmarks

The database does not contain any recorded benchmark scores for either the NVIDIA H20 or the NVIDIA RTX PRO 4500 Blackwell Workstation. Both products have an average benchmark score of 0, and the head-to-head benchmark comparison table is empty. This means no direct performance measurements are available from the database to compare these two accelerators against each other.

The absence of benchmark data is notable, but it does not prevent a specification-level analysis. The H20 belongs to the Server Hopper (Hxx) generation, released on January 31, 2024, while the RTX PRO 4500 is part of the Blackwell PRO W (x000) generation, released on March 17, 2025. Both hold the 50th percentile in the database's ranking of all GPUs, though this percentile is based on the same empty benchmark set.

Without measured scores, the comparison relies entirely on the recorded architectural and specification data. The H20 delivers 39.54 TFLOPS of FP32 performance, while the RTX PRO 4500 delivers 50.53 TFLOPS. This indicates the workstation card holds a 27.8% advantage in single-precision compute based on the listed figures. In FP16, the H20 reaches 79.07 TFLOPS using a 2:1 ratio, whereas the RTX PRO 4500 achieves 50.53 TFLOPS with a 1:1 ratio. The H20 therefore shows a 56.5% advantage in half-precision throughput when both are operating at their rated ratios.

Texture and pixel processing follow a different pattern. The RTX PRO 4500 has a texture rate of 789.5 GTexel/s compared to 617.8 GTexel/s for the H20, a difference of 27.8% in favor of the workstation card. Pixel rate shows a larger gap: 269.6 GPixel/s versus 47.52 GPixel/s, meaning the RTX PRO 4500 delivers over five times the pixel throughput. This stems directly from the render output unit count, where the RTX PRO 4500 has 112 ROPs versus only 24 on the H20.

Memory bandwidth tells another story entirely. The H20 uses 96 GB of HBM3 across a 6144-bit bus, yielding 4.03 TB/s of bandwidth. The RTX PRO 4500 uses 32 GB of GDDR7 on a 256-bit bus, yielding 896.0 GB/s. The H20's bandwidth exceeds the workstation card by a factor of 4.5. The H20's memory clock runs at 1313 MHz with 5.3 Gbps effective speed, while the RTX PRO 4500 runs at 1750 MHz with 28 Gbps effective speed. The higher per-pin speed of GDDR7 does not compensate for the massively wider HBM3 interface.

Shader and tensor core counts are close. The RTX PRO 4500 has 10,496 shading units and 328 tensor cores, while the H20 has 9,984 shading units and 312 tensor cores. The workstation card has 5.1% more shading units and 5.1% more tensor cores. The RTX PRO 4500 also includes 82 ray tracing cores, a feature absent from the H20's recorded specifications. Both have similar texture mapping unit counts: 328 for the RTX PRO 4500 and 312 for the H20.

Where Each One Wins

Based on the recorded data, the H20 wins in memory capacity, memory bandwidth, and half-precision compute. Its 96 GB HBM3 frame buffer exceeds the 32 GB GDDR7 of the RTX PRO 4500 by 200%. Memory bandwidth of 4.03 TB/s versus 896.0 GB/s gives the H20 a 349.8% advantage. FP16 throughput at 79.07 TFLOPS versus 50.53 TFLOPS represents a 56.5% lead. These figures point to workloads that scale with large memory footprints and high-bandwidth data movement, such as large model inference, training with massive batch sizes, or processing high-resolution scientific datasets that cannot fit within a 32 GB frame buffer.

The RTX PRO 4500 wins in FP32 compute, texture rate, pixel rate, and ray tracing. Its 50.53 TFLOPS FP32 output exceeds the H20's 39.54 TFLOPS by 27.8%. Texture rate of 789.5 GTexel/s versus 617.8 GTexel/s gives the workstation card a 27.8% edge. Pixel rate of 269.6 GPixel/s versus 47.52 GPixel/s is a 467.3% advantage. The presence of 82 RT cores versus zero recorded on the H20 indicates the RTX PRO 4500 is equipped for ray-traced rendering tasks, while the H20 is not. The workstation card also supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, whereas the H20 has no recorded API support for these graphics interfaces. Display outputs further separate the two: the RTX PRO 4500 provides 4x DisplayPort 2.1b, while the H20 has no display outputs.

The use-case split is clear. The H20 suits server-side compute where memory capacity and bandwidth dominate, and where display output and graphics APIs are irrelevant. The RTX PRO 4500 suits workstation graphics, rendering, and general-purpose compute where FP32 throughput, rasterization, ray tracing, and display connectivity matter.

Architecture Differences

The H20 is built on the GH100 chip using the Hopper architecture, a 5 nm design from TSMC. The die measures 814 mm² and contains 80,000 million transistors, yielding a transistor density of 98.3 million per mm². The RTX PRO 4500 uses the GB203 chip with the Blackwell 2.0 architecture, also fabbed on 5 nm at TSMC. Its die measures 378 mm² and contains 45,600 million transistors, giving a density of 120.6 million per mm². The Hopper chip is 2.15 times larger in die area and carries 75.4% more transistors, but the Blackwell chip has a 22.7% higher transistor density.

The H20 uses HBM3 memory with a 6144-bit bus width. The RTX PRO 4500 uses GDDR7 with a 256-bit bus. This fundamental memory technology difference drives the bandwidth and capacity gaps. The H20's memory clock is 1313 MHz with 5.3 Gbps effective, while the RTX PRO 4500 runs at 1750 MHz with 28 Gbps effective.

Core organization differs in several respects. The RTX PRO 4500 has 82 RT cores, which the H20 lacks entirely. The H20 has 312 tensor cores, while the RTX PRO 4500 has 328, a difference of 5.1%. Shading units number 9,984 on the H20 and 10,496 on the RTX PRO 4500, also a 5.1% gap. Texture mapping units are 312 versus 328, a 5.1% difference. Render output units show the largest divergence: 24 on the H20 against 112 on the RTX PRO 4500, a 366.7% difference in favor of the workstation card.

The H20 operates at a base clock of 1830 MHz and boost of 1980 MHz. The RTX PRO 4500 has a lower base clock of 1635 MHz but a higher boost clock of 2407 MHz. The boost clock on the workstation card is 21.6% higher than the H20's boost, which contributes to its FP32 throughput advantage despite having only 5.1% more shading units.

Power and physical specifications separate the two clearly. The H20 has a TDP of 500 W and is an SXM Module with a suggested PSU of 900 W. The RTX PRO 4500 has a TDP of 200 W, is a dual-slot card with a 16-pin power connector, and has a suggested PSU of 550 W. The H20 consumes 150% more power than the RTX PRO 4500. The RTX PRO 4500 has recorded dimensions of 267 mm in length, 111 mm in height, and 40 mm in width. The H20 has no recorded dimensions.

The H20 has no display outputs, no power connector listed, and no API support for DirectX, OpenGL, or Vulkan. The RTX PRO 4500 has 4x DisplayPort 2.1b and supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. Both use PCIe 5.0 x16 as their bus interface.

The H20's predecessor is recorded as Server Ada, with Server Blackwell as its successor. The RTX PRO 4500's predecessor is Workstation Ada, with no successor recorded. Both are listed as Active in production status.

FAQ

Q: Which GPU has more memory?

A: The NVIDIA H20 has 96 GB of HBM3 memory, while the NVIDIA RTX PRO 4500 Blackwell Workstation has 32 GB of GDDR7 memory. The H20 holds a 200% capacity advantage.

Q: Which GPU provides higher FP32 compute performance?

A: The RTX PRO 4500 delivers 50.53 TFLOPS of FP32 performance, which is 27.8% higher than the H20's 39.54 TFLOPS.

Q: Does the H20 support display output?

A: No. The H20 has no display outputs and no recorded API support for DirectX, OpenGL, or Vulkan. The RTX PRO 4500 provides 4x DisplayPort 2.1b and supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Q: How do the two GPUs compare in power consumption?

A: The H20 has a TDP of 500 W and a suggested PSU of 900 W. The RTX PRO 4500 has a TDP of 200 W and a suggested PSU of 550 W. The H20 requires 150% more power.

Q: Which GPU has ray tracing cores?

A: The RTX PRO 4500 has 82 RT cores. The H20 has no recorded RT cores.

Q: What is the memory bandwidth difference?

A: The H20 provides 4.03 TB/s of bandwidth from its 6144-bit HBM3 interface. The RTX PRO 4500 provides 896.0 GB/s from its 256-bit GDDR7 interface. The H20's bandwidth is 349.8% higher.

Specification Differences

| Specification | NVIDIA H20 | NVIDIA RTX PRO 4500 Blackwell Workstation |

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

| Architecture | Hopper | Blackwell 2.0 |

| Generation | Server Hopper (Hxx) | Blackwell PRO W (x000) |

| 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 | 1830 MHz | 1635 MHz |

| Boost Clock | 1980 MHz | 2407 MHz |

| Memory Clock | 1313 MHz 5.3 Gbps effective | 1750 MHz 28 Gbps effective |

| Memory Size | 96 GB | 32 GB |

| Memory Type | HBM3 | GDDR7 |

| Memory Bus Width | 6144 bit | 256 bit |

| Memory Bandwidth | 4.03 TB/s | 896.0 GB/s |

| Shading Units | 9984 | 10496 |

| TMUs | 312 | 328 |

| ROPs | 24 | 112 |

| RT Cores | Not listed | 82 |

| Tensor Cores | 312 | 328 |

| Pixel Rate | 47.52 GPixel/s | 269.6 GPixel/s |

| Texture Rate | 617.8 GTexel/s | 789.5 GTexel/s |

| FP32 | 39.54 TFLOPS | 50.53 TFLOPS |

| FP16 | 79.07 TFLOPS (2:1) | 50.53 TFLOPS (1:1) |

| TDP | 500 W | 200 W |

| Slot Width | SXM Module | Dual-slot |

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

| Suggested PSU | 900 W | 550 W |

| Display Outputs | No outputs | 4x DisplayPort 2.1b |

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

| OpenGL | N/A | 4.6 |

| Vulkan | N/A | 1.4 |

| Dimensions | Not listed | 267 mm 10.5 inches length, 111 mm 4.4 inches height, 40 mm 1.6 inches width |

| Release Date | 2024-01-31 | 2025-03-17 |

| Predecessor | Server Ada | Workstation Ada |

| Successor | Server Blackwell | Not listed |

The Verdict

The recorded data shows two accelerators designed for different environments. The H20 is a server module with no display outputs and no graphics API support. Its 96 GB HBM3 frame buffer and 4.03 TB/s bandwidth position it for large-scale compute workloads where memory capacity and data movement speed are the limiting factors. The 79.07 TFLOPS FP16 throughput with a 2:1 ratio suggests mixed-precision compute as a primary use case. The 500 W TDP and SXM module form factor indicate data center deployment with dedicated cooling and power infrastructure.

The RTX PRO 4500 is a dual-slot workstation card with 4x DisplayPort 2.1b outputs and full graphics API support including DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4. Its 82 RT cores, 112 ROPs, and 269.6 GPixel/s pixel rate equip it for rasterization and ray-traced rendering. The 50.53 TFLOPS FP32 performance supports general compute, while the 32 GB GDDR7 frame buffer handles workstation workloads. The 200 W TDP makes it suitable for a conventional desktop workstation.

The H20 should be selected when the workload requires more than 32 GB of memory, needs bandwidth beyond 896.0 GB/s, or relies on FP16 compute at high throughput. The RTX PRO 4500 should be selected when the workload requires display output, graphics API support, ray tracing, or high FP32 throughput. The 5.1% difference in shading units and tensor cores between the two is minor, but the 366.7% difference in ROPs and the presence of RT cores on the RTX PRO 4500 create a decisive separation in graphics capability.

Power requirements reinforce the split. The H20's 500 W TDP and 900 W suggested PSU demand server-class power delivery. The RTX PRO 4500's 200 W TDP and 550 W suggested PSU fit within standard workstation power budgets. The H20's larger die at 814 mm² versus 378 mm² and higher transistor count at 80,000 million versus 45,600 million reflect the server component's focus on memory bandwidth and capacity, while the RTX PRO 4500 achieves higher transistor density at 120.6M / mm² versus 98.3M / mm².

The release dates also indicate product positioning. The H20 launched on January 31, 2024, as part of the Server Hopper generation, with Server Blackwell listed as its successor. The RTX PRO 4500 launched on March 17, 2025, in the Blackwell PRO W generation, with no successor recorded. Both remain active in production.

No benchmark scores exist in the database for either product, so the verdict relies on specification analysis. The data indicates the H20 for memory-bound server compute and the RTX PRO 4500 for graphics-capable workstation use. Neither product can substitute for the other without accepting major trade-offs in memory capacity, bandwidth, graphics features, or power draw.