A100 PCIe 40GB vs RTX A2000

AmperevsAmpereUpdated 35 days ago

The A100 PCIe 40GB emerges as the clear winner for most AI and machine learning use cases, including training and large-scale inference. Its 312 TFLOPS FP16 performance, 40 GB VRAM, and 2039 GB/s bandwidth deliver unmatched throughput, justifying the $1.85 per hour average against the RTX A2000's entry-level specs.

A100 PCIe 40GB from $0.73/hrRTX A2000 from $0.50/hr

Specifications Compared

SpecA100RTX-A2000
TDP400W70W
VRAM40-80 GB6-12 GB
CUDA Cores6,9123,328
Memory TypeHBM2eGDDR6
ArchitectureAmpereAmpere
Form FactorsSXM4, PCIePCIe
InterconnectNVLink, PCIe 4.0, InfiniBand
Tensor Cores432104
FP16 Performance312 TFLOPS8 TFLOPS
FP32 Performance19.5 TFLOPS8 TFLOPS
FP64 Performance9.7 TFLOPS
INT8 Performance624 TOPS
Memory Bandwidth2,039 GB/s288 GB/s

Performance Analysis

The A100 PCIe 40GB's 312 TFLOPS FP16 capability vastly outpaces the RTX A2000's 8 TFLOPS, accelerating deep learning training by enabling tensor core optimizations on large neural networks. Its 19.5 TFLOPS FP32 exceeds the A2000's 8 TFLOPS, benefiting general-purpose computing and simulations requiring single-precision arithmetic. This disparity means training epochs complete up to 39 times faster on the A100 for FP16-dominant tasks like transformer models.

Memory bandwidth defines practical limits: the A100's 2039 GB/s supports batch sizes 7 times larger than the A2000's 288 GB/s, reducing memory bottlenecks in inference and allowing full-model loading without quantization. Lower bandwidth on the A2000 restricts it to smaller batches or models under 6 GB, increasing latency in high-throughput scenarios. Power efficiency follows suit, with the A100's 400W TDP yielding higher throughput per watt for intensive jobs versus the A2000's 70W for idle-heavy use.

Real-world inference sees the A100 handle enterprise-scale deployments seamlessly, while the A2000 fits prototyping where speed sacrifices are tolerable.

Live Cloud Pricing

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

A100 PCIe 40GB

ProviderGPU ModelVRAMHost SpecsRegionPriceStatusAction
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
2×NVIDIA A100 SXM4 80GB
80GB VRAM
$1.00/GPU/hr
$2.00/hr total (2×)
Available
Denvr
Denvr
4×NVIDIA A100 PCIe 80GB
80GB VRAM
$1.15/GPU/hr
$4.60/hr total (4×)
Denvr
Denvr
8×NVIDIA A100 SXM4 80GB
80GB VRAM
$1.15/GPU/hr
$9.20/hr total (8×)

RTX A2000

ProviderGPU ModelVRAMHost SpecsRegionPriceStatusAction
RunPod
RunPod
NVIDIA RTX A2000
12GB VRAM
$0.50/GPU/hr

Compare real-time pricing across 25+ providers

When to Choose the A100 PCIe 40GB

The A100 PCIe 40GB excels in demanding AI workloads such as training large language models exceeding 10 billion parameters. Its 40 GB VRAM and 2039 GB/s bandwidth accommodate full-model precision without splitting, cutting training time significantly compared to the RTX A2000's 6 GB limit. Datacenter users prioritize it for scalable cloud instances starting at $0.60 per hour.

When to Choose the RTX A2000

The RTX A2000 suits budget-conscious developers and edge inference tasks with models under 6 GB. Its 70W TDP and $0.06 per hour pricing enable low-power workstations or testing environments without high overhead. Professionals choose it for Stable Diffusion prototyping or fine-tuning small networks where 8 TFLOPS suffices.

Use Cases

LLM Training
A100 PCIe 40GB

The A100's 312 TFLOPS FP16 and 40 GB VRAM handle massive models and large batches efficiently. The A2000's 8 TFLOPS and 6 GB VRAM cannot scale to similar sizes.

LLM Inference
A100 PCIe 40GB

2039 GB/s bandwidth supports high-throughput serving of large models without quantization. The A2000's 288 GB/s limits it to smaller models or reduced batch sizes.

Fine-tuning
A100 PCIe 40GB

19.5 TFLOPS FP32 and high VRAM enable full fine-tuning of billion-parameter models. The A2000 works for small models but slows on datasets over 6 GB.

Stable Diffusion
RTX A2000

The A2000's 8 TFLOPS FP16 suffices for image generation at 6 GB VRAM with low $0.06 per hour cost. A100 overkill unless scaling to high resolutions.

Scientific Computing
A100 PCIe 40GB

19.5 TFLOPS FP32 outperforms A2000's 8 TFLOPS for simulations like CFD. High bandwidth accelerates data-heavy computations.

Frequently Asked Questions

What is the VRAM difference between A100 PCIe 40GB and RTX A2000?

The A100 provides 40 GB HBM2e VRAM, while the RTX A2000 offers 6-12 GB GDDR6. This allows the A100 to load much larger models without offloading.

How do FP16 performances compare?

A100 delivers 312 TFLOPS FP16 versus RTX A2000's 8 TFLOPS, a 39-fold advantage for AI training. This speeds up tensor operations significantly.

What are the cloud pricing differences?

A100 PCIe 40GB starts at $0.60 per hour averaging $1.85 across 11 offers. RTX A2000 starts at $0.06 per hour averaging $0.23 across 3 offers.

Is RTX A2000 more power efficient?

Yes, at 70W TDP versus A100's 400W, but A100 yields higher absolute performance. Choose A2000 for low-power edge use.

Can RTX A2000 handle LLM inference?

It manages small models under 6 GB with 8 TFLOPS FP16, but struggles with large ones due to 288 GB/s bandwidth. A100 excels here.

Which has better memory bandwidth?

A100's 2039 GB/s dwarfs A2000's 288 GB/s by over 7 times. This impacts batch sizes in training and inference.

Which is cheaper to rent, the A100 or the RTX A2000?

Cloud rental prices for both the A100 and RTX A2000 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 A2000?

The A100 has 40 to 80 GB of HBM2e memory. The RTX A2000 has 6 to 12 GB of GDDR6 memory.

Can I find A100 and RTX A2000 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 A2000?

The A100 uses the Ampere architecture (2020) while the RTX A2000 uses Ampere (2021). The A100 delivers 39.0x the FP16 throughput and 7.1x the memory bandwidth of the RTX A2000.