Specifications Compared
| Spec | H100 | RTX-A4000 |
|---|---|---|
| TDP | 700W | 140W |
| VRAM | 80-94 GB | 16 GB |
| CUDA Cores | 16,896 | 6,144 |
| Memory Type | HBM3 | GDDR6 |
| Architecture | Hopper | Ampere |
| Form Factors | SXM5, PCIe, NVL | PCIe |
| Interconnect | NVLink, PCIe 5.0, InfiniBand | |
| Tensor Cores | 528 | 192 |
| FP8 Performance | 3,958 TFLOPS | |
| FP16 Performance | 1,979 TFLOPS | 19.2 TFLOPS |
| FP32 Performance | 67 TFLOPS | 19.2 TFLOPS |
| FP64 Performance | 34 TFLOPS | |
| INT8 Performance | 3,958 TOPS | |
| Memory Bandwidth | 3,350 GB/s | 448 GB/s |
Performance Analysis
The H100 SXM5 vastly outpaces the RTX A4500 in compute: its 1979 TFLOPS FP16 enables rapid AI training where mixed precision dominates, while the A4500's 38 TFLOPS FP16 suits smaller models. The H100 SXM5's FP32 at 67 TFLOPS exceeds the A4500's 24 TFLOPS, benefiting simulation tasks requiring full precision. Memory bandwidth defines real-world limits: 3350 GB/s on the H100 SXM5 supports batch sizes over 10 times larger than the A4500's 576 GB/s, reducing training epochs for LLMs. In inference, the H100 SXM5's 80 GB VRAM loads models exceeding 70B parameters intact, avoiding the A4500's 20 GB constraint that forces quantization or multi-GPU setups. Power draw underscores scalability: 700W TDP for the H100 SXM5 powers dense clusters via NVLink, whereas the A4500's 140W fits single-node efficiency. These metrics translate to 50x faster deep learning iterations on the H100 SXM5 for memory-bound workloads.
Live Cloud Pricing
Real-time prices from 25+ providers. Updated every 60 seconds.
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 |
RTX A4500
| Provider | GPU Model | VRAM | Host Specs | Region | Price | Status | Action | |
|---|---|---|---|---|---|---|---|---|
![]() TensorDock | NVIDIA RTX A4000 16GB VRAM | 16GB | 0 vCPU 0GB RAM | Tallinn, Harjumaa | $0.08/GPU/hr | Available | ||
![]() TensorDock | NVIDIA RTX A4000 16GB VRAM | 16GB | 0 vCPU 0GB RAM | Tallinn, Harjumaa | $0.10/GPU/hr | Available | ||
![]() TensorDock | NVIDIA RTX A4000 16GB VRAM | 16GB | 0 vCPU 0GB RAM | Southfield, Michigan | $0.11/GPU/hr | Available | ||
![]() Vast.ai | 8×NVIDIA RTX A4000 16GB VRAM | 16GB | 80 vCPU 201GB RAM 1698GB Storage | United Kingdom | $0.15/GPU/hr $1.17/hr total (8×) | Available | ||
![]() Hyperstack | 2×NVIDIA RTX A4000 16GB VRAM | 16GB | 8 vCPU 43GB RAM 200GB Storage | Norway | $0.15/GPU/hr $0.30/hr total (2×) | Available |
When to Choose the H100 SXM5
Select the H100 SXM5 for large-scale LLM training or inference demanding over 40 GB VRAM and 1000 TFLOPS FP16. Its 3350 GB/s bandwidth handles enormous datasets in scientific simulations or multi-trillion parameter models. Datacenter environments leverage its SXM5 form factor and NVLink for clustered performance unattainable on PCIe-only A4500 setups.
When to Choose the RTX A4500
The RTX A4500 suits budget-conscious visualization, CAD, or fine-tuning under 10B parameters with its 20 GB VRAM at $0.10 per hour. Lower 140W TDP enables dense cloud instances for rendering or moderate ML without H100 SXM5's $3.52 average cost. Single-user workflows benefit from its PCIe compatibility and balanced 38 TFLOPS FP16.
Use Cases
H100 SXM5's 80 GB HBM3 VRAM and 1979 TFLOPS FP16 support massive batch sizes for trillion-parameter models. A4500's 20 GB limits it to small-scale training.
The 3350 GB/s bandwidth and 3958 TFLOPS FP8 on H100 SXM5 enable low-latency serving of large models. A4500 requires model sharding due to 20 GB VRAM.
A4500 handles fine-tuning up to 13B parameters efficiently at low cost. H100 SXM5 accelerates larger models with 67 TFLOPS FP32.
RTX A4500's 20 GB VRAM and 38 TFLOPS FP16 generate images quickly at $0.10 per hour. H100 SXM5 overkill for typical 512x512 resolutions.
H100 SXM5's 3350 GB/s bandwidth and NVLink excel in HPC simulations with large matrices. A4500 suffices for lighter CFD or molecular dynamics.
Frequently Asked Questions
How much VRAM does the H100 SXM5 have compared to RTX A4500?▾
The H100 SXM5 provides 80 GB HBM3 VRAM. The RTX A4500 has 20 GB GDDR6. This allows H100 SXM5 to load models four times larger without offloading.
What is the performance difference in FP16 for H100 SXM5 vs A4500?▾
H100 SXM5 achieves 1979 TFLOPS FP16. RTX A4500 reaches 38 TFLOPS FP16. The gap yields 50x faster AI training iterations on H100 SXM5.
Which GPU has higher memory bandwidth H100 SXM5 or A4500?▾
H100 SXM5 offers 3350 GB/s bandwidth. A4500 provides 576 GB/s. Higher bandwidth on H100 SXM5 supports larger batches in deep learning.
What are the cloud prices for H100 SXM5 and RTX A4500?▾
H100 SXM5 starts at $0.80 per hour averaging $3.52 across 34 offers. RTX A4500 begins at $0.10 per hour averaging $0.19 across 4 offers.
Is RTX A4500 good for Stable Diffusion?▾
RTX A4500 generates images effectively with 20 GB VRAM and 38 TFLOPS FP16. It outperforms consumer GPUs for batch inference at low cost.
Can H100 SXM5 use NVLink with A4500?▾
H100 SXM5 supports NVLink for multi-GPU scaling. RTX A4500 lacks NVLink, relying on PCIe. This limits A4500 to single-GPU or basic PCIe pooling.
Which is cheaper to rent, the H100 or the RTX A4000?▾
Cloud rental prices for both the H100 and RTX A4000 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 H100 have compared to the RTX A4000?▾
The H100 has 80 to 94 GB of HBM3 memory. The RTX A4000 has 16 GB of GDDR6 memory.
Can I find H100 and RTX A4000 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 H100 and the RTX A4000?▾
The H100 uses the Hopper architecture (2022) while the RTX A4000 uses Ampere (2021). The H100 delivers 103.1x the FP16 throughput and 7.5x the memory bandwidth of the RTX A4000.


