GB300 SXM6 vs H100 NVL

Blackwell UltravsHopperUpdated 35 days ago

The GB300 SXM6 emerges as the winner for dominant AI training and inference use cases: 288 GB VRAM and 12000 GB/s bandwidth enable scaling to larger models unattainable on H100 NVL's 80-94 GB and 3350 GB/s, despite higher 1400W power draw.

H100 NVL from $1.90/hr

Specifications Compared

SpecGB300H100
TDP1400W700W
VRAM288 GB80-94 GB
Memory TypeHBM3eHBM3
ArchitectureBlackwell UltraHopper
Form FactorsSXMSXM5, PCIe, NVL
InterconnectNVSwitch, NVLinkNVLink, PCIe 5.0, InfiniBand
FP8 Performance4,500 TFLOPS3,958 TFLOPS
FP16 Performance2,250 TFLOPS1,979 TFLOPS
FP32 Performance90 TFLOPS67 TFLOPS
FP64 Performance45 TFLOPS34 TFLOPS
INT8 Performance4,500 TOPS3,958 TOPS
Memory Bandwidth12,000 GB/s3,350 GB/s

Performance Analysis

Superior FP16 performance of 2250 TFLOPS on the GB300 SXM6 versus 1979 TFLOPS on the H100 NVL accelerates deep learning training by enabling faster iterations on large datasets. The FP32 uplift to 90 TFLOPS from 67 TFLOPS benefits simulations and graphics rendering requiring higher precision. In inference scenarios, FP8 at 4500 TFLOPS on GB300 SXM6 outpaces H100 NVL's 3958 TFLOPS, reducing latency for real-time applications. Memory capacity defines feasibility: 288 GB HBM3e on GB300 SXM6 supports massive batch sizes for models exceeding 100 billion parameters, while H100 NVL's 80-94 GB HBM3 limits scale and necessitates model parallelism. Bandwidth disparity is profound: 12000 GB/s on GB300 SXM6 minimizes bottlenecks in data-intensive workloads, allowing 3.6 times faster memory access than H100 NVL's 3350 GB/s, which enhances throughput in training loops and inference serving.

Live Cloud Pricing

Real-time prices from 25+ providers. Updated every 60 seconds.

H100 NVL

ProviderGPU ModelVRAMHost SpecsRegionPriceStatusAction
Hyperstack
Hyperstack
4×NVIDIA H100 PCIe
80GB VRAM
$1.90/GPU/hr
$7.60/hr total (4×)
Available
Hyperstack
Hyperstack
2×NVIDIA H100 PCIe
80GB VRAM
$1.90/GPU/hr
$3.80/hr total (2×)
Available
Hyperstack
Hyperstack
8×NVIDIA H100 PCIe
80GB VRAM
$1.90/GPU/hr
$15.20/hr total (8×)
Available
Hyperstack
Hyperstack
NVIDIA H100 PCIe
80GB VRAM
$1.90/GPU/hr
Available
Hyperstack
Hyperstack
8×NVIDIA H100 PCIe
80GB VRAM
$1.95/GPU/hr
$15.60/hr total (8×)
Available

Compare real-time pricing across 25+ providers

When to Choose the GB300 SXM6

The GB300 SXM6 excels in exascale AI training and inference for trillion-parameter models: its 288 GB VRAM and 12000 GB/s bandwidth accommodate unprecedented batch sizes without sharding. Data centers planning for 2025 deployments prioritize its 2250 TFLOPS FP16 and NVSwitch interconnects for cluster efficiency. High TDP tolerance at 1400W suits hyperscale environments unconcerned with current pricing absence.

When to Choose the H100 NVL

The H100 NVL suits immediate production needs with availability and pricing from $1.40 per hour averaging $2.89 per hour across nine offers. Its 700W TDP reduces cooling costs versus GB300 SXM6's 1400W, ideal for mid-scale clusters. Form factor flexibility including NVL supports diverse setups where 1979 TFLOPS FP16 suffices for current LLMs.

Use Cases

LLM Training
GB300 SXM6

GB300 SXM6's 288 GB VRAM and 2250 TFLOPS FP16 handle massive datasets and parameters: H100 NVL's 80-94 GB limits batch sizes.

LLM Inference
GB300 SXM6

4500 TFLOPS FP8 and 12000 GB/s bandwidth on GB300 SXM6 deliver lower latency for high-throughput serving: superior to H100 NVL's 3958 TFLOPS and 3350 GB/s.

Fine-tuning
Either

Both GPUs manage fine-tuning effectively, but GB300 SXM6's 90 TFLOPS FP32 aids precision tasks: H100 NVL's availability favors quick starts.

Stable Diffusion
H100 NVL

H100 NVL's 1979 TFLOPS FP16 and $1.40 per hour pricing suffice for image generation: GB300 SXM6 overkill for typical resolutions.

Scientific Computing
GB300 SXM6

GB300 SXM6's 90 TFLOPS FP32 and NVSwitch scaling accelerate simulations: outperforming H100 NVL's 67 TFLOPS.

Frequently Asked Questions

What is the VRAM difference between GB300 SXM6 and H100 NVL?

GB300 SXM6 offers 288 GB HBM3e VRAM. H100 NVL provides 80-94 GB HBM3. This enables GB300 SXM6 to load larger models without partitioning.

How do FP16 performances compare?

GB300 SXM6 achieves 2250 TFLOPS in FP16. H100 NVL delivers 1979 TFLOPS. The gap speeds up training by approximately 14 percent.

What are the power requirements?

GB300 SXM6 has a 1400W TDP. H100 NVL operates at 700W. Lower power on H100 NVL eases data center integration.

Is there pricing for GB300 SXM6?

No live offers exist for GB300 SXM6 currently. H100 NVL starts at $1.40 per hour, averaging $2.89 per hour across nine providers.

Which has higher memory bandwidth?

GB300 SXM6 reaches 12000 GB/s. H100 NVL offers 3350 GB/s. This 3.6-fold advantage reduces data transfer delays on GB300 SXM6.

What architectures power these GPUs?

GB300 SXM6 uses Blackwell Ultra from 2025. H100 NVL employs Hopper from 2022. Blackwell Ultra introduces optimizations for next-generation AI.

Which is cheaper to rent, the GB300 or the H100?

Cloud rental prices for both the GB300 and H100 vary by provider, configuration, and availability. This page shows live pricing from 25+ providers updated every 60 seconds. Scroll to the Live Cloud Pricing section to compare current rates.

How much VRAM does the GB300 have compared to the H100?

The GB300 has 288 GB of HBM3e memory. The H100 has 80 to 94 GB of HBM3 memory.

Can I find GB300 and H100 GPUs available to rent right now?

Yes. This page shows real-time availability across 25+ cloud GPU providers. The Live Cloud Pricing section displays only in-stock offers with current pricing.

What is the main difference between the GB300 and the H100?

The GB300 uses the Blackwell Ultra architecture (2025) while the H100 uses Hopper (2022). The GB300 delivers 1.1x the FP16 throughput and 3.6x the memory bandwidth of the H100.

GB300 SXM6 vs H100 NVL: 288GB HBM3e vs 94GB HBM3 | GPUPerHour