NVIDIA B300 SXM6 AC vs NVIDIA H200 NVL Comparison

The NVIDIA B300 SXM6 AC and NVIDIA H200 NVL represent two distinct generations of NVIDIA's server acceleration lineup, with the B300 SXM6 AC built on the Blackwell Ultra architecture and the H200 NVL on the Hopper architecture. Benchmark results place the B300 SXM6 AC at the top of the performance stack, scoring 369,831 in Geekbench OpenCL, which is 10.4% higher than the H200 NVL's 334,891. Both processors achieve the 100th percentile among all GPUs, indicating that each sits at the absolute apex of available hardware, though the B300 SXM6 AC does so with a clear margin over its predecessor generation.

FAQ

Q: How much faster is the NVIDIA B300 SXM6 AC than the NVIDIA H200 NVL in the provided benchmark?

A: In the Geekbench OpenCL test, the B300 SXM6 AC scores 369,831 compared to the H200 NVL's 334,891, giving the B300 SXM6 AC a 10.4% advantage. This is the only head-to-head benchmark available in the data.

Q: What is the percentile ranking of each GPU relative to all other GPUs?

A: Both the NVIDIA B300 SXM6 AC and the NVIDIA H200 NVL are in the 100th percentile of all GPUs, meaning they outperform every other GPU in the database according to their average benchmark scores.

Q: How does the NVIDIA B300 SXM6 AC compare to its closest rival, the NVIDIA B200?

A: The B300 SXM6 AC has an average score of 369,831, which is 7% higher than the NVIDIA B200's average score of 345,482, according to the nearestRivals data.

Q: How does the NVIDIA H200 NVL compare to the AMD Instinct MI300X?

A: The H200 NVL scores 334,891, which is 5.3% higher than the AMD Instinct MI300X's score of 317,994. This places the H200 NVL ahead of the AMD competitor but still behind the B300 SXM6 AC.

Q: What is the transistor count difference between the two GPUs?

A: The NVIDIA B300 SXM6 AC contains 208,000 million transistors on a 1628 mm² die, while the NVIDIA H200 NVL contains 80,000 million transistors on an 814 mm² die. This results in a transistor density of 127.8M per mm² for the B300 SXM6 AC versus 98.3M per mm² for the H200 NVL.

Q: Which GPU has a higher boost clock speed?

A: The NVIDIA B300 SXM6 AC has a boost clock of 2032 MHz, while the NVIDIA H200 NVL has a boost clock of 1785 MHz. The B300 SXM6 AC also has a higher base clock at 1665 MHz versus 1365 MHz.

Architecture Differences

The NVIDIA B300 SXM6 AC is built on the Blackwell Ultra architecture using the GB110 chip, while the NVIDIA H200 NVL uses the Hopper architecture with the GH100 chip. This generational shift introduces fundamental changes in compute capability and memory subsystem design. The B300 SXM6 AC is manufactured on a 5 nm process at TSMC, as is the H200 NVL, but the B300 SXM6 AC packs significantly more hardware into a larger die: 208,000 million transistors across 1628 mm² versus 80,000 million transistors across 814 mm² for the H200 NVL. This translates to a transistor density of 127.8M per mm² for the B300 SXM6 AC, substantially higher than the H200 NVL's 98.3M per mm².

The compute configuration differs markedly between the two. The B300 SXM6 AC features 18,944 shading units, 592 TMUs, and 592 tensor cores, while the H200 NVL has 16,896 shading units, 528 TMUs, and 528 tensor cores. Both GPUs have 24 ROPs. The FP32 throughput reflects this difference: the B300 SXM6 AC delivers 76.99 TFLOPS, while the H200 NVL delivers 60.32 TFLOPS. However, FP16 performance reveals an architectural divergence: the B300 SXM6 AC achieves 76.99 TFLOPS at a 1:1 ratio with FP32, whereas the H200 NVL achieves 120.6 TFLOPS at a 2:1 ratio, meaning the H200 NVL actually outperforms the B300 SXM6 AC in raw FP16 throughput despite its older architecture.

Clock speeds also favor the B300 SXM6 AC, with a base clock of 1665 MHz and boost of 2032 MHz compared to the H200 NVL's 1365 MHz base and 1785 MHz boost. Memory clocks follow the same trend: the B300 SXM6 AC runs at 2000 MHz with 8 Gbps effective, while the H200 NVL runs at 1593 MHz with 6.4 Gbps effective. Pixel and texture rates are correspondingly higher on the B300 SXM6 AC, at 48.77 GPixel/s and 1,202.9 GTexel/s versus 42.84 GPixel/s and 942.5 GTexel/s on the H200 NVL.

Where Each One Wins

The NVIDIA B300 SXM6 AC wins in the single available benchmark, the Geekbench OpenCL test, with a score of 369,831 against the H200 NVL's 334,891. This 10.4% advantage suggests the B300 SXM6 AC is the stronger choice for OpenCL-based workloads, which often reflect general-purpose compute and AI inference tasks. The B300 SXM6 AC also holds advantages in raw FP32 performance, memory bandwidth, and memory capacity, making it better suited for workloads that demand high precision compute or large model residency.

The NVIDIA H200 NVL, while trailing in the OpenCL benchmark, offers superior FP16 throughput at 120.6 TFLOPS compared to the B300 SXM6 AC's 76.99 TFLOPS. This makes the H200 NVL potentially more attractive for workloads that heavily utilize FP16 mixed-precision operations, such as certain deep learning training scenarios where the 2:1 FP16 ratio can be exploited. The H200 NVL also has a lower power footprint, with a TDP of 600 W versus 1100 W for the B300 SXM6 AC, which could make it preferable in power-constrained environments despite the performance gap.

The B300 SXM6 AC is the clear winner in memory capacity and bandwidth. It offers 288 GB of HBM3e memory across an 8192-bit bus, delivering 8.19 TB/s of bandwidth, while the H200 NVL offers 141 GB of HBM3e across a 6144-bit bus, providing 4.89 TB/s. For workloads that require massive memory pools, such as large language model inference or scientific simulation, the B300 SXM6 AC's capacity advantage is decisive.

Specification Differences

The two GPUs differ across nearly every specification category. The B300 SXM6 AC uses the GB110 chip on Blackwell Ultra architecture, while the H200 NVL uses the GH100 chip on Hopper architecture. The B300 SXM6 AC has 208,000 million transistors on a 1628 mm² die versus 80,000 million transistors on an 814 mm² die for the H200 NVL. Transistor density is 127.8M per mm² for the B300 SXM6 AC and 98.3M per mm² for the H200 NVL.

Clock speeds differ substantially: the B300 SXM6 AC runs at 1665 MHz base and 2032 MHz boost, while the H200 NVL runs at 1365 MHz base and 1785 MHz boost. Memory clocks are 2000 MHz with 8 Gbps effective on the B300 SXM6 AC versus 1593 MHz with 6.4 Gbps effective on the H200 NVL. Memory configuration diverges sharply: the B300 SXM6 AC has 288 GB of HBM3e on an 8192-bit bus with 8.19 TB/s bandwidth, while the H200 NVL has 141 GB of HBM3e on a 6144-bit bus with 4.89 TB/s bandwidth.

Compute resources differ in count: the B300 SXM6 AC has 18,944 shading units, 592 TMUs, and 592 tensor cores, while the H200 NVL has 16,896 shading units, 528 TMUs, and 528 tensor cores. Both have 24 ROPs. Pixel rate is 48.77 GPixel/s on the B300 SXM6 AC versus 42.84 GPixel/s on the H200 NVL. Texture rate is 1,202.9 GTexel/s on the B300 SXM6 AC versus 942.5 GTexel/s on the H200 NVL. FP32 performance is 76.99 TFLOPS on the B300 SXM6 AC versus 60.32 TFLOPS on the H200 NVL, while FP16 performance is 76.99 TFLOPS (1:1) on the B300 SXM6 AC versus 120.6 TFLOPS (2:1) on the H200 NVL.

Power and physical specifications also differ. The B300 SXM6 AC has a TDP of 1100 W with a suggested PSU of 1500 W, while the H200 NVL has a TDP of 600 W with a suggested PSU of 1000 W. The B300 SXM6 AC is an SXM Module form factor, while the H200 NVL is a dual-slot card measuring 267 mm by 111 mm. The H200 NVL has an 8-pin EPS power connector, while the B300 SXM6 AC lists no power connectors. Bus interfaces differ as well: the B300 SXM6 AC uses PCIe 6.0 x16, while the H200 NVL uses PCIe 5.0 x16. Neither GPU has display outputs.

Head-to-Head Benchmarks

The only head-to-head benchmark in the data is the Geekbench OpenCL test, where the NVIDIA B300 SXM6 AC scores 369,831 against the NVIDIA H200 NVL's 334,891. This represents a 10.4% delta in favor of the B300 SXM6 AC, which is the sole winner across the available benchmarks. The B300 SXM6 AC also leads its closest rival, the NVIDIA B200, by 7% in average score, while the H200 NVL trails the B200 by 3.1%.

In terms of relative positioning, the B300 SXM6 AC's nearest rivals include the B200 at 345,482 (7% behind), the H200 NVL at 334,891 (10.4% behind), the AMD Instinct MI300X at 317,994 (16.3% behind), and the NVIDIA L40S at 295,763 (25% behind). The H200 NVL's nearest rivals are the B200 at 345,482 (3.1% ahead), the AMD Instinct MI300X at 317,994 (5.3% behind the H200 NVL), the B300 SXM6 AC at 369,831 (9.4% ahead of the H200 NVL), and the NVIDIA L40S at 295,763 (13.2% behind the H200 NVL).

The 10.4% gap between the two reviewed GPUs is consistent with the generational uplift seen in the nearestRivals data. The B300 SXM6 AC's advantage over the H200 NVL is slightly larger than the B200's advantage over the H200 NVL, which sits at 3.1%, indicating that the B300 SXM6 AC represents a more substantial step forward within the Blackwell family than the B200 does over Hopper. The H200 NVL's 5.3% lead over the AMD Instinct MI300X shows that even the older architecture remains competitive against AMD's flagship, but the B300 SXM6 AC extends NVIDIA's lead over AMD to 16.3%. The B300 SXM6 AC's 25% lead over the NVIDIA L40S further underscores its position as the highest-performing GPU in the database, while the H200 NVL maintains a 13.2% lead over the same rival.