A100 SXM4 40GB vs RTX 2080 Ti

AmperevsTuringUpdated 35 days ago

The A100 SXM4 40GB emerges as the superior choice for most AI workloads due to its 312 TFLOPS FP16, 40 GB VRAM, and 2039 GB/s bandwidth, enabling efficient training of large models unattainable on the RTX 2080 Ti. Despite higher $2.63 average hourly cost, performance gains justify selection over the budget $0.11 RTX 2080 Ti for professional use.

A100 SXM4 40GB from $0.73/hrRTX 2080 Ti from $0.13/hr

Specifications Compared

SpecA100RTX-2080
TDP400W215W
VRAM40-80 GB8-11 GB
CUDA Cores6,9122,944
Memory TypeHBM2eGDDR6
ArchitectureAmpereTuring
Form FactorsSXM4, PCIePCIe
InterconnectNVLink, PCIe 4.0, InfiniBandNVLink
Tensor Cores432368
FP16 Performance312 TFLOPS10.1 TFLOPS
FP32 Performance19.5 TFLOPS10.1 TFLOPS
FP64 Performance9.7 TFLOPS
INT8 Performance624 TOPS
Memory Bandwidth2,039 GB/s616 GB/s

Performance Analysis

Compute specifications reveal stark differences suited to distinct workloads. The A100's 312 TFLOPS FP16 performance excels in mixed-precision training, accelerating neural network optimization by handling tensor operations up to 30 times faster than the RTX 2080 Ti's 10.1 TFLOPS. For FP32 tasks like scientific simulations, the A100 delivers 19.5 TFLOPS against the RTX 2080 Ti's 10.1 TFLOPS, nearly doubling throughput. This FP16 to FP32 ratio on the A100, 16:1, optimizes deep learning where half-precision suffices, unlike the RTX 2080 Ti's 1:1 balance better for graphics. Memory bandwidth of 2039 GB/s on the A100 supports massive batch sizes in training, reducing iterations for models exceeding 11 GB VRAM limits of the RTX 2080 Ti. The RTX 2080 Ti's 616 GB/s bandwidth suits smaller datasets but bottlenecks large-scale inference. Power draw at 400W TDP for the A100 demands robust cooling versus the RTX 2080 Ti's efficient 215W, influencing cloud instance selection. Interconnects like NVLink and InfiniBand on the A100 enable multi-GPU scaling unavailable on the PCIe-only RTX 2080 Ti.

Live Cloud Pricing

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

A100 SXM4 40GB

ProviderGPU ModelVRAMHost SpecsRegionPriceStatusAction
Vast.ai
Vast.ai
NVIDIA A100 SXM4 80GB
80GB VRAM
$0.73/GPU/hr
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 2080 Ti

ProviderGPU ModelVRAMHost SpecsRegionPriceStatusAction
Vast.ai
Vast.ai
NVIDIA GeForce RTX 2080 Ti
11GB VRAM
$0.13/GPU/hr
Available

Compare real-time pricing across 25+ providers

When to Choose the A100 SXM4 40GB

Select the A100 SXM4 40GB for large-scale AI training and inference requiring over 11 GB VRAM. Its 40 GB HBM2e capacity handles massive language models, while 2039 GB/s bandwidth supports batch sizes infeasible on the RTX 2080 Ti. NVLink and InfiniBand facilitate distributed training across nodes, ideal for enterprise deployments at $1.00 to $2.63 per hour.

When to Choose the RTX 2080 Ti

The RTX 2080 Ti fits budget-conscious tasks like gaming or lightweight ML inference on small models under 11 GB VRAM. At $0.06 to $0.11 per hour, it offers 10.1 TFLOPS FP16 for prototyping without datacenter overhead. Its 215W TDP and PCIe form factor suit single-user cloud instances for Stable Diffusion or fine-tuning compact networks.

Use Cases

LLM Training
A100 SXM4 40GB

The A100's 40 GB VRAM and 312 TFLOPS FP16 handle billion-parameter models with large batches. The RTX 2080 Ti's 11 GB limits scale.

LLM Inference
A100 SXM4 40GB

A100's 2039 GB/s bandwidth supports high-throughput serving. RTX 2080 Ti suffices only for tiny models under 11 GB.

Fine-tuning
A100 SXM4 40GB

A100's 19.5 TFLOPS FP32 accelerates parameter updates on datasets needing 40 GB. RTX 2080 Ti restricts to small adapters.

Stable Diffusion
Either

RTX 2080 Ti's 10.1 TFLOPS FP16 generates images quickly at low cost. A100 overkill unless scaling to high resolutions.

Scientific Computing
A100 SXM4 40GB

A100's 19.5 TFLOPS FP32 and NVLink excel in simulations. RTX 2080 Ti's PCIe limits multi-GPU compute.

Frequently Asked Questions

What is the VRAM difference between A100 SXM4 40GB and RTX 2080 Ti?

The A100 provides 40 GB HBM2e VRAM, far exceeding the RTX 2080 Ti's 11 GB GDDR6. This allows the A100 to load larger models without swapping. Bandwidth reaches 2039 GB/s on A100 versus 616 GB/s on RTX 2080 Ti.

How do FP16 performances compare for AI training?

A100 delivers 312 TFLOPS FP16, over 30 times the RTX 2080 Ti's 10.1 TFLOPS. This accelerates mixed-precision training significantly. FP32 is 19.5 TFLOPS on A100 against 10.1 TFLOPS on RTX 2080 Ti.

What are the cloud rental prices?

A100 SXM4 40GB starts at $1.00 per hour, averaging $2.63 across five offers. RTX 2080 Ti begins at $0.06 per hour, averaging $0.11 across six offers. Prices reflect performance disparity.

Is RTX 2080 Ti good for machine learning?

RTX 2080 Ti offers 10.1 TFLOPS FP16 for entry-level ML on models under 11 GB VRAM. It lags behind A100's 312 TFLOPS for serious workloads. Use it for prototyping at low cost.

Which has better interconnects for multi-GPU?

A100 supports NVLink, PCIe 4.0, and InfiniBand for scaling. RTX 2080 Ti relies on PCIe only. This makes A100 ideal for clusters.

Compare power consumption

A100 TDP is 400W, requiring datacenter cooling. RTX 2080 Ti uses 215W, more efficient for consumer setups. Higher TDP correlates with A100's superior 312 TFLOPS.

Which is cheaper to rent, the A100 or the RTX 2080?

Cloud rental prices for both the A100 and RTX 2080 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 2080?

The A100 has 40 to 80 GB of HBM2e memory. The RTX 2080 has 8 to 11 GB of GDDR6 memory.

Can I find A100 and RTX 2080 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 2080?

The A100 uses the Ampere architecture (2020) while the RTX 2080 uses Turing (2018). The A100 delivers 30.9x the FP16 throughput and 3.3x the memory bandwidth of the RTX 2080.

A100 SXM4 40GB vs RTX 2080 Ti: 80GB vs 11GB | GPUPerHour