A100 SXM4 80GB vs RTX A4500

AmperevsAmpereUpdated 35 days ago

The NVIDIA A100 SXM4 80GB emerges as the winner for prevalent AI training use cases. Its 312 TFLOPS FP16 and 80 GB HBM2e VRAM outperform the RTX A4500's 19.2 TFLOPS and 16 GB GDDR6, enabling larger models despite higher average $1.39 per hour cost versus $0.19 per hour.

A100 SXM4 80GB from $0.73/hrRTX A4500 from $0.08/hr

Specifications Compared

SpecA100RTX-A4000
TDP400W140W
VRAM40-80 GB16 GB
CUDA Cores6,9126,144
Memory TypeHBM2eGDDR6
ArchitectureAmpereAmpere
Form FactorsSXM4, PCIePCIe
InterconnectNVLink, PCIe 4.0, InfiniBand
Tensor Cores432192
FP16 Performance312 TFLOPS19.2 TFLOPS
FP32 Performance19.5 TFLOPS19.2 TFLOPS
FP64 Performance9.7 TFLOPS
INT8 Performance624 TOPS
Memory Bandwidth2,039 GB/s448 GB/s

Performance Analysis

Compute capabilities differ sharply in FP16: the A100 SXM4 80GB delivers 312 TFLOPS, accelerating deep learning training by handling tensor operations sixteen times faster than the RTX A4500's 19.2 TFLOPS. FP32 rates are close at 19.5 TFLOPS for A100 and 19.2 TFLOPS for A4500, making them comparable for traditional simulations. This FP16 delta means A100 shortens training cycles for neural networks, while A4500 suffices for inference on lighter models. Memory defines practical limits: A100's 80 GB HBM2e and 2039 GB/s bandwidth enable large batch sizes in model training, minimizing data loading bottlenecks. The A4500's 16 GB GDDR6 and 448 GB/s restrict it to smaller batches, often requiring model sharding or reduced precision. Power consumption follows suit with A100 at 400W TDP versus A4500 at 140W, influencing cloud instance selection and cooling needs.

Live Cloud Pricing

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

A100 SXM4 80GB

ProviderGPU ModelVRAMHost SpecsRegionPriceStatusAction
Vast.ai
Vast.ai
NVIDIA A100 SXM4 80GB
80GB VRAM
$0.73/GPU/hr
Available
Vast.ai
Vast.ai
2×NVIDIA A100 SXM4 80GB
80GB VRAM
$0.73/GPU/hr
$1.47/hr total (2×)
Available
LeaderGPU
LeaderGPU
8×NVIDIA A100 PCIe 80GB
80GB VRAM
$0.90/GPU/hr
$7.20/hr total (8×)
Available
Vast.ai
Vast.ai
NVIDIA A100 SXM4 80GB
80GB VRAM
$1.07/GPU/hr
Available
Denvr
Denvr
8×NVIDIA A100 SXM4 80GB
80GB VRAM
$1.15/GPU/hr
$9.20/hr total (8×)

RTX A4500

ProviderGPU ModelVRAMHost SpecsRegionPriceStatusAction
TensorDock
TensorDock
NVIDIA RTX A4000
16GB VRAM
$0.08/GPU/hr
Available
Vast.ai
Vast.ai
8×NVIDIA RTX A4000
16GB VRAM
$0.15/GPU/hr
$1.17/hr total (8×)
Available
Hyperstack
Hyperstack
4×NVIDIA RTX A4000
16GB VRAM
$0.15/GPU/hr
$0.60/hr total (4×)
Available
Hyperstack
Hyperstack
2×NVIDIA RTX A4000
16GB VRAM
$0.15/GPU/hr
$0.30/hr total (2×)
Available
Hyperstack
Hyperstack
NVIDIA RTX A4000
16GB VRAM
$0.15/GPU/hr
Available

Compare real-time pricing across 25+ providers

When to Choose the A100 SXM4 80GB

Select the NVIDIA A100 SXM4 80GB for large-scale AI training and scientific computing. Its 80 GB VRAM accommodates massive datasets, and 2039 GB/s bandwidth supports high-throughput multi-GPU scaling via NVLink. At $0.45 per hour starting price, it excels in environments demanding 312 TFLOPS FP16 performance across 25 cloud offers.

When to Choose the RTX A4500

The NVIDIA RTX A4500 fits cost-conscious deployments for single-GPU inference or visualization tasks. With 16 GB VRAM and 19.2 TFLOPS across FP16 and FP32 at 140W TDP, it handles moderate workloads efficiently. Its $0.10 per hour pricing across 4 offers makes it ideal for prototyping or edge computing.

Use Cases

LLM Training
A100 SXM4 80GB

The A100 SXM4 80GB's 80 GB VRAM and 312 TFLOPS FP16 support large language models without sharding. The RTX A4500's 16 GB VRAM limits batch sizes severely.

LLM Inference
A100 SXM4 80GB

A100's 2039 GB/s bandwidth and 312 TFLOPS FP16 deliver higher throughput for production inference. A4500 manages smaller models but bottlenecks on memory-intensive queries.

Fine-tuning
Either

RTX A4500's 19.2 TFLOPS FP32 suffices for small model fine-tuning at low $0.10 per hour cost. A100 accelerates larger efforts with 80 GB VRAM.

Stable Diffusion
RTX A4500

RTX A4500's 16 GB VRAM and 140W TDP handle image generation efficiently at $0.19 per hour average. A100 overkill for single-user creative tasks.

Scientific Computing
A100 SXM4 80GB

A100's 2039 GB/s bandwidth and NVLink interconnect scale simulations across nodes. A4500's 448 GB/s suits single-node runs only.

Frequently Asked Questions

What is the VRAM difference between A100 SXM4 80GB and RTX A4500?

The A100 SXM4 80GB has 80 GB HBM2e VRAM. The RTX A4500 provides 16 GB GDDR6 VRAM. This gap affects handling of large datasets in AI workloads.

How do FP16 performances compare?

A100 SXM4 80GB achieves 312 TFLOPS in FP16. RTX A4500 reaches 19.2 TFLOPS. A100 processes tensor operations over 16 times faster for training.

What are the cloud pricing details?

A100 SXM4 80GB starts at $0.45 per hour, averaging $1.39 across 25 offers. RTX A4500 begins at $0.10 per hour, averaging $0.19 across 4 offers.

Which has higher memory bandwidth?

A100 SXM4 80GB offers 2039 GB/s bandwidth. RTX A4500 provides 448 GB/s. Higher bandwidth on A100 supports larger batch sizes.

What are the TDP ratings?

A100 SXM4 80GB consumes 400W TDP. RTX A4500 uses 140W TDP. Lower TDP on A4500 eases deployment in power-constrained clouds.

Are both GPUs on Ampere architecture?

Yes, A100 launched in 2020 and RTX A4500 in 2021 on Ampere. They share core features but A100 optimizes for datacenter scale.

Which is cheaper to rent, the A100 or the RTX A4000?

Cloud rental prices for both the A100 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 A100 have compared to the RTX A4000?

The A100 has 40 to 80 GB of HBM2e memory. The RTX A4000 has 16 GB of GDDR6 memory.

Can I find A100 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 A100 and the RTX A4000?

The A100 uses the Ampere architecture (2020) while the RTX A4000 uses Ampere (2021). The A100 delivers 16.3x the FP16 throughput and 4.6x the memory bandwidth of the RTX A4000.

A100 SXM4 80GB vs RTX A4500: 80GB vs 16GB | GPUPerHour