NVIDIA H20 vs NVIDIA RTX PRO 6000 Blackwell Server Comparison

Head-to-Head Benchmarks

The recorded data shows a stark asymmetry in benchmark coverage between these two server accelerators. The NVIDIA H20 has no benchmark entries in the database, while the NVIDIA RTX PRO 6000 Blackwell Server has a single recorded result in the 3DMark Steel Nomad DX12 test. That result is a score of 5996, which places the RTX PRO 6000 Blackwell Server at the 34th percentile among all GPUs in the database.

The absence of benchmark data for the H20 means no direct head-to-head comparison can be drawn from measured performance. The H20 carries a 50th percentile ranking across all GPUs, but this percentile is derived from zero recorded benchmark scores, making it a placeholder rather than a measured outcome. The RTX PRO 6000 Blackwell Server, by contrast, delivers an average benchmark score of 5996 based on its one recorded test.

The nearest rivals for the RTX PRO 6000 Blackwell Server reveal an unusual competitive landscape. The NVIDIA GeForce GTX 770M averages 6000, which is 0.1% above the RTX PRO 6000 Blackwell Server's 5996. The AMD Radeon RX 6400 also averages 6001, again 0.1% higher. On the other side, the AMD FirePro W4100 averages 5987, which is 0.2% below, and the NVIDIA Quadro K4000M averages 5986, also 0.2% below. These deltas are minuscule, placing the RTX PRO 6000 Blackwell Server in a cluster of GPUs with nearly identical Steel Nomad scores, despite the massive architectural gulf between a modern server Blackwell accelerator and these older mobile and entry-level parts.

The H20 cannot be compared in this manner because it has no nearest rivals listed and no benchmark scores. The database records zero wins for the H20 and one win for the RTX PRO 6000 Blackwell Server, but that win is only by virtue of having any recorded result at all. The H20's 50th percentile ranking versus the RTX PRO 6000 Blackwell Server's 34th percentile is a statistical artifact: the H20's percentile is unearned by measurable performance, while the RTX PRO 6000 Blackwell Server's percentile reflects a real, if narrow, data point.

Where Each One Wins

Based strictly on recorded measurements, the RTX PRO 6000 Blackwell Server wins the only benchmark where both could theoretically compete, though the H20 has no result to contest. The 3DMark Steel Nomad DX12 score of 5996 demonstrates that the RTX PRO 6000 Blackwell Server can execute a modern DX12 graphics workload, which is consistent with its DirectX 12 Ultimate (12_2) API support. The H20, with no display outputs and no DirectX, OpenGL, or Vulkan API support listed, cannot participate in such a test at all.

The H20 wins in the domain of compute density per watt, based on specifications rather than benchmarks. The H20 delivers 39.54 TFLOPS FP32 performance while consuming 500 W, yielding a ratio of roughly 0.079 TFLOPS per watt. The RTX PRO 6000 Blackwell Server delivers 126.0 TFLOPS FP32 at 600 W, yielding 0.21 TFLOPS per watt. The RTX PRO 6000 Blackwell Server is therefore more efficient in raw FP32 throughput per watt, so the H20 does not win on that axis either.

Where the H20 does hold an advantage is in memory bandwidth. The H20's HBM3 memory subsystem provides 4.03 TB/s of bandwidth across a 6144-bit bus, while the RTX PRO 6000 Blackwell Server's GDDR7 memory delivers 1.79 TB/s across a 512-bit bus. The H20 offers 2.25 times the memory bandwidth, which is decisive for bandwidth-bound workloads such as large model inference or data-intensive scientific computing. The RTX PRO 6000 Blackwell Server counters with a higher boost clock of 2617 MHz versus the H20's 1980 MHz, and a much higher texture rate of 1,968.0 GTexel/s versus 617.8 GTexel/s.

The RTX PRO 6000 Blackwell Server also wins on pixel throughput, delivering 502.5 GPixel/s versus the H20's 47.52 GPixel/s, a 10.6-fold advantage. This reflects the RTX PRO 6000 Blackwell Server's 192 ROPs versus the H20's 24 ROPs. For any rasterization or graphics output workload, the RTX PRO 6000 Blackwell Server is the only candidate with functional display outputs and graphics API support.

Architecture Differences

The two accelerators belong to different NVIDIA server generations. The H20 uses the GH100 chip based on the Hopper architecture, part of the Server Hopper (Hxx) generation. The RTX PRO 6000 Blackwell Server uses the GB202 chip based on Blackwell 2.0, part of the Server Blackwell (Bxx) generation. The H20's predecessor is listed as Server Ada and its successor as Server Blackwell, while the RTX PRO 6000 Blackwell Server's predecessor is Server Hopper and its successor is Server Rubin.

Both chips are fabricated on a 5 nm process at TSMC, but the transistor counts differ substantially. The H20's GH100 packs 80,000 million transistors on an 814 mm² die, yielding a transistor density of 98.3 million per square millimeter. The RTX PRO 6000 Blackwell Server's GB202 packs 92,200 million transistors on a 750 mm² die, yielding a density of 122.9 million per square millimeter. The Blackwell chip is denser and smaller while carrying more transistors.

The H20 has 9984 shading units, 312 TMUs, and 24 ROPs. The RTX PRO 6000 Blackwell Server has 24064 shading units, 752 TMUs, and 192 ROPs. The RTX PRO 6000 Blackwell Server also includes 188 dedicated ray tracing cores, while the H20 lists no RT cores. Tensor core counts also differ: the H20 has 312 tensor cores, while the RTX PRO 6000 Blackwell Server has 752.

The FP16 processing approach diverges. The H20 delivers 79.07 TFLOPS FP16 at a 2:1 ratio relative to FP32, meaning it uses a split or doubled-rate scheme. The RTX PRO 6000 Blackwell Server delivers 126.0 TFLOPS FP16 at a 1:1 ratio, meaning FP16 and FP32 throughput are identical. This indicates the Blackwell architecture does not accelerate FP16 beyond FP32, while Hopper does.

The H20 uses HBM3 memory, the RTX PRO 6000 Blackwell Server uses GDDR7. The H20's memory clock is 1313 MHz with 5.3 Gbps effective data rate, while the RTX PRO 6000 Blackwell Server's memory clock is 1750 MHz with 28 Gbps effective. The H20's memory bus is 6144 bits wide versus 512 bits, and the resulting bandwidths are 4.03 TB/s versus 1.79 TB/s.

Specification Differences

The base clocks differ: the H20 runs at 1830 MHz base and 1980 MHz boost, while the RTX PRO 6000 Blackwell Server runs at 1590 MHz base and 2617 MHz boost. The H20 has a lower boost clock but a higher base clock. The RTX PRO 6000 Blackwell Server's boost clock is 32% higher than the H20's.

Power consumption differs by 100 W: the H20 has a TDP of 500 W, the RTX PRO 6000 Blackwell Server has a TDP of 600 W. The suggested power supply rating also differs, with the H20 requiring a 900 W PSU and the RTX PRO 6000 Blackwell Server requiring a 1000 W PSU.

The physical form factors are entirely different. The H20 is an SXM module with no display outputs, no length, height, or width dimensions listed, and no power connector details. The RTX PRO 6000 Blackwell Server is a dual-slot card measuring 267 mm in length, 111 mm in height, and 40 mm in width, with a single 16-pin power connector and 4 DisplayPort 2.1b outputs.

API support is another differentiator. The H20 lists DirectX, OpenGL, and Vulkan as N/A. The RTX PRO 6000 Blackwell Server supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The H20 is a compute-only accelerator, while the RTX PRO 6000 Blackwell Server supports graphics rendering and display output.

The release dates differ by roughly 14 months. The H20 was released on 2024-01-31, while the RTX PRO 6000 Blackwell Server was released on 2025-03-17. Both are listed as Active in production status, and both use PCIe 5.0 x16 as the bus interface.

Memory capacity is identical at 96 GB, but the type, bus width, and bandwidth differ as detailed above. The H20's 6144-bit bus is 12 times wider than the RTX PRO 6000 Blackwell Server's 512-bit bus, yet the HBM3 bandwidth advantage is only 2.25 times due to the much higher effective data rate of GDDR7.

FAQ

Q: Which GPU has higher FP32 compute throughput?

A: The RTX PRO 6000 Blackwell Server delivers 126.0 TFLOPS FP32, which is 3.19 times the H20's 39.54 TFLOPS FP32.

Q: How do the memory subsystems compare?

A: The H20 uses 96 GB of HBM3 on a 6144-bit bus with 4.03 TB/s bandwidth. The RTX PRO 6000 Blackwell Server uses 96 GB of GDDR7 on a 512-bit bus with 1.79 TB/s bandwidth. The H20 provides 2.25 times the memory bandwidth.

Q: Can either GPU output video to displays?

A: The H20 has no display outputs and no graphics API support. The RTX PRO 6000 Blackwell Server has 4 DisplayPort 2.1b outputs and supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4.

Q: What is the transistor density difference?

A: The H20's GH100 chip has 80,000 million transistors on an 814 mm² die, for 98.3 million per mm². The RTX PRO 6000 Blackwell Server's GB202 chip has 92,200 million transistors on a 750 mm² die, for 122.9 million per mm².

Q: Which GPU has more shading units and tensor cores?

A: The RTX PRO 6000 Blackwell Server has 24,064 shading units and 752 tensor cores. The H20 has 9,984 shading units and 312 tensor cores.

Q: What are the power requirements?

A: The H20 has a 500 W TDP and a suggested PSU of 900 W. The RTX PRO 6000 Blackwell Server has a 600 W TDP and a suggested PSU of 1000 W.

The Verdict

The data directs different buyers to each card based on workload type. The H20 is the choice for memory-bandwidth-dominated compute workloads. Its 4.03 TB/s of HBM3 bandwidth across a 6144-bit interface is unmatched by the RTX PRO 6000 Blackwell Server's 1.79 TB/s GDDR7 implementation. For large-scale model inference, scientific simulation, or any task where data movement is the bottleneck, the H20's bandwidth advantage is the decisive specification.

The RTX PRO 6000 Blackwell Server is the choice for graphics-capable compute and raw FP32 throughput. Its 126.0 TFLOPS FP32 is 3.19 times the H20's 39.54 TFLOPS, and its 188 ray tracing cores, 192 ROPs, 502.5 GPixel/s pixel rate, and 1,968.0 GTexel/s texture rate make it the only one of the two that can render graphics. Its display outputs and full DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4 support confirm it as a hybrid server GPU, whereas the H20 is compute-only.

The benchmark record favors the RTX PRO 6000 Blackwell Server, with a 3DMark Steel Nomad DX12 score of 5996. The H20 has no recorded benchmark score. The RTX PRO 6000 Blackwell Server's nearest rivals, the GeForce GTX 770M and Radeon RX 6400, score within 0.1% of it, while the FirePro W4100 and Quadro K4000M score 0.2% below. This clustering suggests the Steel Nomad result measures a specific workload where these disparate GPUs converge, but it does not diminish the RTX PRO 6000 Blackwell Server's specification-level dominance in shading, texturing, and rasterization.

The H20's 50th percentile ranking against all GPUs is not supported by any measured benchmark, while the RTX PRO 6000 Blackwell Server's 34th percentile is grounded in a real score. For buyers requiring a server accelerator with graphics output, API compatibility, and the highest FP32 and FP16 throughput, the RTX PRO 6000 Blackwell Server is the data-supported pick. For buyers whose workload is purely memory-bandwidth-bound and does not require graphics or display functionality, the H20's 96 GB HBM3 pool and 4.03 TB/s bandwidth justify its selection. Both cards are active in production, use PCIe 5.0 x16, and are fabricated on TSMC 5 nm, but they serve distinct roles in the server accelerator landscape.