Specifications Compared
| Spec | A100 | H100 |
|---|---|---|
| TDP | 400W | 700W |
| VRAM | 40-80 GB | 80-94 GB |
| CUDA Cores | 6,912 | 16,896 |
| Memory Type | HBM2e | HBM3 |
| Architecture | Ampere | Hopper |
| Form Factors | SXM4, PCIe | SXM5, PCIe, NVL |
| Interconnect | NVLink, PCIe 4.0, InfiniBand | NVLink, PCIe 5.0, InfiniBand |
| Tensor Cores | 432 | 528 |
| FP16 Performance | 312 TFLOPS | 1,979 TFLOPS |
| FP32 Performance | 19.5 TFLOPS | 67 TFLOPS |
| FP64 Performance | 9.7 TFLOPS | 34 TFLOPS |
| INT8 Performance | 624 TOPS | 3,958 TOPS |
| Memory Bandwidth | 2,039 GB/s | 3,350 GB/s |
Performance Analysis
The H100 SXM5 demonstrates superior compute throughput over A100 PCIe 40GB, particularly in FP16 at 1979 TFLOPS versus 312 TFLOPS: this accelerates deep learning training by enabling faster matrix multiplications in neural networks. FP32 performance rises to 67 TFLOPS from 19.5 TFLOPS, benefiting scientific simulations and precision-bound inference tasks. The addition of FP8 at 3958 TFLOPS on H100 optimizes large language model inference with reduced precision requirements.
Memory differences prove critical for real-world scalability: H100's 3350 GB/s bandwidth compared to 2039 GB/s supports larger batch sizes in training, reducing overhead and fitting bigger models into 80 GB HBM3 versus 40 GB HBM2e. Higher TDP of 700W on H100 versus 400W demands robust cooling but yields proportional gains in sustained workloads like LLM fine-tuning.
Live Cloud Pricing
Real-time prices from 25+ providers. Updated every 60 seconds.
A100 PCIe 40GB
| Provider | GPU Model | VRAM | Host Specs | Region | Price | Status | Action | |
|---|---|---|---|---|---|---|---|---|
 Vast.ai | NVIDIA A100 SXM4 80GB 80GB VRAM | 80GB | 256 vCPU 63GB RAM 2826GB Storage | Slovenia | $0.73/GPU/hr | Available | ||
Vast.ai | 2×NVIDIA A100 SXM4 80GB 80GB VRAM | 80GB | 256 vCPU 126GB RAM 794GB Storage | Slovenia | $0.73/GPU/hr $1.47/hr total (2×) | Available | ||
 LeaderGPU | 8×NVIDIA A100 PCIe 80GB 80GB VRAM | 80GB | 64 vCPU 384GB RAM 2000GB Storage | Netherlands | $0.90/GPU/hr $7.20/hr total (8×) | Available | ||
Vast.ai | NVIDIA A100 SXM4 80GB 80GB VRAM | 80GB | 64 vCPU 63GB RAM 557GB Storage | Czechia | $1.00/GPU/hr | Available | ||
 Denvr | 4×NVIDIA A100 PCIe 80GB 80GB VRAM | 80GB | 64 vCPU 512GB RAM 7600GB Storage | Virginia | $1.15/GPU/hr $4.60/hr total (4×) |
H100 SXM5
| Provider | GPU Model | VRAM | Host Specs | Region | Price | Status | Action | |
|---|---|---|---|---|---|---|---|---|
 Hyperstack | 4×NVIDIA H100 PCIe 80GB VRAM | 80GB | 124 vCPU 720GB RAM 3300GB Storage | Canada | $1.90/GPU/hr $7.60/hr total (4×) | Available | ||
Hyperstack | 2×NVIDIA H100 PCIe 80GB VRAM | 80GB | 60 vCPU 360GB RAM 1600GB Storage | Canada | $1.90/GPU/hr $3.80/hr total (2×) | Available | ||
Hyperstack | 8×NVIDIA H100 PCIe 80GB VRAM | 80GB | 252 vCPU 1440GB RAM 6600GB Storage | Canada | $1.90/GPU/hr $15.20/hr total (8×) | Available | ||
Hyperstack | NVIDIA H100 PCIe 80GB VRAM | 80GB | 28 vCPU 180GB RAM 850GB Storage | Canada | $1.90/GPU/hr | Available | ||
Hyperstack | 8×NVIDIA H100 PCIe 80GB VRAM | 80GB | 252 vCPU 1440GB RAM 6600GB Storage | Canada | $1.95/GPU/hr $15.60/hr total (8×) | Available |
When to Choose the A100 PCIe 40GB
Opt for NVIDIA A100 PCIe 40GB in cost-constrained environments or legacy Ampere-optimized codebases. Its pricing from $0.60 per hour and 400W TDP suit smaller-scale deployments, such as fine-tuning mid-sized models within 40 GB VRAM limits. PCIe 4.0 compatibility integrates easily into existing clusters without NVLink upgrades.
When to Choose the H100 SXM5
Select NVIDIA H100 SXM5 for peak performance in cutting-edge AI pipelines. The 1979 TFLOPS FP16 and 80 GB HBM3 excel in training massive LLMs or handling large-batch inference at 3350 GB/s bandwidth. SXM5 form factor with PCIe 5.0 and NVLink supports high-density, multi-GPU supercomputing setups despite 700W power draw.
Use Cases
H100's 1979 TFLOPS FP16 and 80 GB HBM3 handle massive datasets and large batch sizes better than A100's 312 TFLOPS and 40 GB VRAM.
FP8 performance at 3958 TFLOPS on H100 accelerates high-throughput serving, surpassing A100's FP16-only 312 TFLOPS.
H100's 3350 GB/s bandwidth and 67 TFLOPS FP32 enable efficient adaptation of large models, outpacing A100's 2039 GB/s and 19.5 TFLOPS.
A100's 40 GB VRAM suffices for standard image generation at 312 TFLOPS FP16; H100's extras shine only in ultra-high-resolution batches.
A100's 19.5 TFLOPS FP32 and lower $1.85 per hour average cost fit simulations within 400W TDP, avoiding H100's power overhead.
Frequently Asked Questions
Which GPU has more VRAM: A100 PCIe 40GB or H100 SXM5?▾
H100 SXM5 provides 80 GB HBM3, doubling A100 PCIe 40GB's 40 GB HBM2e capacity. This enables larger models without model parallelism. Bandwidth also rises to 3350 GB/s from 2039 GB/s.
How do A100 and H100 compare in FP16 performance?▾
H100 SXM5 achieves 1979 TFLOPS FP16, over six times A100 PCIe 40GB's 312 TFLOPS. This translates to faster AI training cycles. FP32 improves to 67 TFLOPS from 19.5 TFLOPS.
What are the cloud rental prices for these GPUs?▾
A100 PCIe 40GB starts at $0.60 per hour, averaging $1.85 across 11 offers. H100 SXM5 begins at $0.80 per hour, averaging $3.54 over 32 offers. Prices reflect performance premiums.
Is H100 more power-hungry than A100?▾
H100 SXM5 has a 700W TDP, nearly double A100 PCIe 40GB's 400W. This supports higher throughput but requires advanced cooling. Efficiency gains offset in dense clusters.
Can A100 handle LLM inference as well as H100?▾
A100 PCIe 40GB manages with 312 TFLOPS FP16 but lacks H100's FP8 at 3958 TFLOPS for optimal low-precision serving. H100's 80 GB VRAM fits larger models directly.
What architecture do A100 and H100 use?▾
A100 employs Ampere from 2020; H100 uses Hopper from 2022. Hopper introduces FP8 and enhanced tensor cores for AI gains over Ampere.
Which is cheaper to rent, the A100 or the H100?▾
Cloud rental prices for both the A100 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 A100 have compared to the H100?▾
The A100 has 40 to 80 GB of HBM2e memory. The H100 has 80 to 94 GB of HBM3 memory.
Can I find A100 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 A100 and the H100?▾
The A100 uses the Ampere architecture (2020) while the H100 uses Hopper (2022). The H100 delivers 6.3x the FP16 throughput and 1.6x the memory bandwidth of the A100.