AMD Radeon Pro W6600X vs NVIDIA H200 NVL Comparison

The Verdict

The NVIDIA H200 NVL and AMD Radeon Pro W6600X are not competitors in any practical sense; the data places them in different performance tiers entirely. The H200 NVL is a server accelerator designed for massive compute workloads, posting a Geekbench OpenCL score of 334,891, which puts it in the 100th percentile of all GPUs. The W6600X, a Mac-focused workstation card, scores 107,342 in Geekbench Metal, landing in the 94th percentile. The performance gap is enormous, but each card serves a distinct purpose.

The H200 NVL is the clear choice for anyone running dense compute tasks, AI inference, or high-performance computing where raw throughput and memory capacity are paramount. Its score places it 5.3% ahead of the AMD Instinct MI300X and 13.2% ahead of the NVIDIA L40S, although it trails the newer NVIDIA B200 by 3.1%. The W6600X, by contrast, is a legacy workstation product, now end-of-life, that sits within 3.1% of the AMD Radeon PRO W7900 and trades blows with the AMD Radeon Pro Vega II. Those looking for a modern, high-performance solution should choose the H200 NVL; those constrained to the Apple MPX ecosystem or legacy Mac Pro environments would select the W6600X, but the benchmark data shows it is not a contender in raw processing power.

Architecture Differences

The two GPUs are built on fundamentally different architectures and process nodes. The NVIDIA H200 NVL uses the GH100 chip on the Hopper architecture, fabricated on a 5 nm process at TSMC, with 80,000 million transistors packed into an 814 mm² die. That density works out to 98.3 million transistors per square millimeter. The AMD Radeon Pro W6600X uses the Navi 23 chip on the RDNA 2.0 architecture, built on a 7 nm process at TSMC, with 11,060 million transistors on a 237 mm² die, for a density of 46.7 million per square millimeter. The H200 NVL has more than seven times the transistor count and over three times the die area.

The compute resources differ sharply. The H200 NVL carries 16,896 shading units, 528 texture mapping units, 24 render output units, and 528 tensor cores. It has no dedicated ray tracing cores listed. The W6600X has 2,048 shading units, 128 TMUs, 64 ROPs, and 32 ray tracing cores, but no tensor cores. The H200 NVL is built around tensor core acceleration for AI workloads, a feature entirely absent in the AMD part. The W6600X does support a full API stack, including DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, while the H200 NVL lists no API support at all, reflecting its compute-only, headless design with no display outputs.

Head-to-Head Benchmarks

Direct head-to-head benchmark data between these two cards is not recorded in the database. However, the average benchmark scores provide a clear basis for comparison. The H200 NVL scores 334,891 in Geekbench OpenCL, while the W6600X scores 107,342 in Geekbench Metal. The H200 NVL is 212% higher in absolute score, though the different benchmark APIs make a strict percentage comparison less meaningful than the overall tier separation. The H200 NVL's score is more than three times that of the W6600X, which indicates a vast performance lead in compute throughput.

Looking at the H200 NVL's nearest rivals, it beats the AMD Instinct MI300X by 5.3% and the NVIDIA L40S by 13.2%, but it falls short of the NVIDIA B200 by 3.1% and the NVIDIA B300 SXM6 AC by 9.4%. The W6600X, on the other hand, sits within a narrow band of its peers: it is 0.6% ahead of the AMD Radeon Pro Vega II Duo, 2.1% behind the AMD Radeon Pro Vega II, 3.1% behind the AMD Radeon PRO W7900, and 5.4% ahead of the NVIDIA Quadro RTX 6000. These deltas show that the W6600X is a mid-pack workstation card, while the H200 NVL is at the top of the performance hierarchy, ranking in the 100th percentile of all GPUs.

Specification Differences

The specification sheet separates these two cards across every major dimension. The H200 NVL has a base clock of 1365 MHz and a boost clock of 1785 MHz, with memory clocked at 1593 MHz, achieving 6.4 Gbps effective. The W6600X has a higher base clock of 2068 MHz and a boost of 2479 MHz, with memory at 2000 MHz for 16 Gbps effective. Despite higher clocks, the AMD card's smaller memory configuration limits its overall throughput. The H200 NVL packs 141 GB of HBM3e memory on a 6144-bit bus, delivering 4.89 TB/s of bandwidth. The W6600X has 8 GB of GDDR6 on a 128-bit bus, delivering 256.0 GB/s. That is a 19-fold difference in memory capacity and roughly a 19-fold difference in bandwidth.

Compute rates are equally separated. The H200 NVL achieves 60.32 TFLOPS FP32 and 120.6 TFLOPS FP16 (2:1). The W6600X manages 10.15 TFLOPS FP32 and 20.31 TFLOPS FP16 (2:1). Pixel and texture rates also differ: the H200 NVL has 42.84 GPixel/s and 942.5 GTexel/s, while the W6600X has 158.7 GPixel/s and 317.3 GTexel/s. The AMD card actually has a higher pixel fill rate, which is typical of a graphics-oriented GPU, but the H200 NVL dominates texture rate due to its massive TMU count.

Power and physical specs diverge as well. The H200 NVL has a TDP of 600 W, requires an 8-pin EPS power connector, and a suggested PSU of 1000 W. It measures 267 mm in length and 111 mm in height, taking a dual-slot form factor. The W6600X has a TDP of 120 W, no dedicated power connector listed, and a suggested PSU of only 300 W. It is also dual-slot, but its dimensions are not recorded. The H200 NVL uses a PCIe 5.0 x16 interface, while the W6600X uses an Apple MPX interface. The H200 NVL has no display outputs, and the W6600X also lists no display outputs. The H200 NVL is still in active production, having been released in November 2024, while the W6600X is end-of-life, released in August 2021. The W6600X did have a launch MSRP of 699 USD, but the H200 NVL has no recorded launch price.

FAQ

Q: Which GPU has the higher benchmark score?

A: The NVIDIA H200 NVL scores 334,891 in Geekbench OpenCL, while the AMD Radeon Pro W6600X scores 107,342 in Geekbench Metal. The H200 NVL is above 3.1 times the score of the W6600X.

Q: How does the H200 NVL compare to its nearest rivals?

A: The H200 NVL beats the AMD Instinct MI300X by 5.3% and the NVIDIA L40S by 13.2%. It trails the NVIDIA B200 by 3.1% and the NVIDIA B300 SXM6 AC by 9.4%.

Q: What are the memory capacity and bandwidth differences?

A: The H200 NVL has 141 GB of HBM3e memory with a 6144-bit bus and 4.89 TB/s bandwidth. The W6600X has 8 GB of GDDR6 on a 128-bit bus with 256.0 GB/s bandwidth.

Q: Which card has ray tracing support?

A: The AMD Radeon Pro W6600X has 32 dedicated ray tracing cores. The NVIDIA H200 NVL does not have listed ray tracing cores.

Q: What power supplies are required for these cards?

A: The H200 NVL has a 600 W TDP and requires a suggested PSU of 1000 W. The W6600X has a 120 W TDP and a suggested PSU of 300 W.

Q: Which card is still in production?

A: The NVIDIA H200 NVL has an active production status with a release date in November 2024. The AMD Radeon Pro W6600X is end-of-life, released in August 2021.

Where Each One Wins

The NVIDIA H200 NVL wins decisively in compute throughput. Its FP32 performance of 60.32 TFLOPS dwarfs the W6600X's 10.15 TFLOPS, a nearly 6-fold difference. In FP16, the gap is similar: 120.6 TFLOPS versus 20.31 TFLOPS. The H200 NVL also dominates memory-bound workloads, with 4.89 TB/s of bandwidth and 141 GB of capacity, making it suitable for large language models, scientific simulation, and data center acceleration. Its tensor cores give it a clear advantage in AI inference and training, a feature the W6600X lacks entirely. The H200 NVL also holds its own against its own competitive set, being 13.2% faster than the L40S and 5.3% faster than the MI300X.

The AMD Radeon Pro W6600X does have one notable win: pixel fill rate. It hits 158.7 GPixel/s against the H200's 42.84 GPixel/s, which reflects its graphics-oriented design. It also has a higher boost clock (2479 MHz vs 1785 MHz) and it supports the full DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4 APIs, while the H200 NVL has no API support listed. The W6600X also wins on power efficiency, with a 120 W TDP versus 600 W, and a 300 W suggested PSU versus 1000 W. However, its performance band among rivals is tight, all within 5.4% of each other, indicating it is not a top-tier accelerator. The W6600X is best suited for the Apple MPX ecosystem or legacy Mac Pro systems where its lower power and graphics focus matter, but for any heavy compute task, the H200 NVL is the obvious pick from the data.