GB300 SXM6 vs RTX A5000

Blackwell UltravsAmpereUpdated 35 days ago

The GB300 emerges as the superior choice for prevalent AI workloads like LLM training and inference. Its 2250 TFLOPS FP16, 288 GB VRAM, and 12000 GB/s bandwidth deliver unmatched scale, outpacing the A5000's 27.8 TFLOPS and 24 GB VRAM by orders of magnitude despite lacking current cloud availability.

RTX A5000 from $0.23/hr

Specifications Compared

SpecGB300RTX-A5000
TDP1400W230W
VRAM288 GB24 GB
Memory TypeHBM3eGDDR6
ArchitectureBlackwell UltraAmpere
Form FactorsSXMPCIe
InterconnectNVSwitch, NVLinkNVLink
FP8 Performance4,500 TFLOPS
FP16 Performance2,250 TFLOPS27.8 TFLOPS
FP32 Performance90 TFLOPS27.8 TFLOPS
FP64 Performance45 TFLOPS
INT8 Performance4,500 TOPS
Memory Bandwidth12,000 GB/s768 GB/s

Performance Analysis

The GB300 vastly outperforms the A5000 in compute capabilities: its 2250 TFLOPS FP16 enables rapid AI model training, far exceeding the A5000's 27.8 TFLOPS, while FP32 at 90 TFLOPS supports precise scientific simulations better than the A5000's 27.8 TFLOPS. FP8 performance on the GB300 hits 4500 TFLOPS, ideal for high-throughput inference on quantized large language models.

Memory specifications define workload feasibility. The GB300's 288 GB HBM3e VRAM and 12000 GB/s bandwidth handle enormous batch sizes in training massive models without swapping, unlike the A5000's 24 GB GDDR6 and 768 GB/s, which limit batches to smaller datasets. This disparity means the GB300 accelerates convergence in deep learning by processing larger contexts, whereas the A5000 suits prototyping or inference on modest models.

Power and form factors influence deployment. The GB300's 1400W TDP demands liquid cooling in racks, optimizing cluster efficiency via NVSwitch, while the A5000's 230W PCIe fits standard servers with lower overhead.

Live Cloud Pricing

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

RTX A5000

ProviderGPU ModelVRAMHost SpecsRegionPriceStatusAction
Vast.ai
Vast.ai
4×NVIDIA RTX A5000
24GB VRAM
$0.23/GPU/hr
$0.92/hr total (4×)
Available
RunPod
RunPod
NVIDIA RTX A5000
24GB VRAM
$0.27/GPU/hr
Cirrascale
Cirrascale
8×NVIDIA RTX A5000
24GB VRAM
$0.41/GPU/hr
$3.28/hr total (8×)
Cirrascale
Cirrascale
8×NVIDIA RTX A5000
24GB VRAM
$0.46/GPU/hr
$3.68/hr total (8×)
Cirrascale
Cirrascale
8×NVIDIA RTX A5000
24GB VRAM
$0.49/GPU/hr
$3.92/hr total (8×)

Compare real-time pricing across 25+ providers

When to Choose the GB300 SXM6

Select the GB300 for hyperscale AI training or inference on models exceeding 100 billion parameters: its 288 GB VRAM accommodates full model loading, and 12000 GB/s bandwidth sustains peak 2250 TFLOPS FP16 throughput. Datacenter operators benefit from NVSwitch interconnects in multi-node setups at 1400W TDP.

When to Choose the RTX A5000

Choose the RTX A5000 for cost-sensitive prototyping, visualization, or small-scale AI tasks: cloud pricing starts at $0.03 per hour across 32 offers, with 24 GB VRAM sufficient for models under 10 billion parameters. Its 230W TDP and PCIe form factor enable easy integration into workstations without specialized infrastructure.

Use Cases

LLM Training
GB300 SXM6

The GB300's 288 GB HBM3e VRAM and 2250 TFLOPS FP16 handle massive datasets and models without partitioning. The A5000's 24 GB limits it to smaller-scale training.

LLM Inference
GB300 SXM6

GB300 FP8 at 4500 TFLOPS and 12000 GB/s bandwidth enable high-throughput serving of large models. A5000's 27.8 TFLOPS FP16 restricts concurrency.

Fine-tuning
Either

GB300 excels for parameter-efficient fine-tuning on huge models with 288 GB VRAM. A5000 suffices for smaller LoRA adapters at $0.03 per hour.

Stable Diffusion
RTX A5000

A5000's 24 GB GDDR6 supports image generation pipelines efficiently at low 230W TDP. GB300's 1400W overkill for single-node creative workflows.

Scientific Computing
GB300 SXM6

GB300's 90 TFLOPS FP32 and 288 GB VRAM accelerate simulations like molecular dynamics. A5000's matching 27.8 TFLOPS FP32 fits lighter computations.

Frequently Asked Questions

What is the VRAM capacity of the GB300 versus RTX A5000?

The GB300 provides 288 GB HBM3e VRAM for large-scale AI models. The RTX A5000 offers 24 GB GDDR6, suitable for moderate workloads. This 12-fold difference impacts model size handling.

How do memory bandwidths compare?

GB300 achieves 12000 GB/s with HBM3e, enabling massive batch processing. RTX A5000 delivers 768 GB/s on GDDR6 for standard tasks. The gap supports larger contexts on GB300.

What are the FP16 performance figures?

GB300 reaches 2250 TFLOPS FP16 for accelerated training. RTX A5000 provides 27.8 TFLOPS FP16. This yields over 80 times faster tensor operations on GB300.

Is the GB300 available on cloud platforms?

No live offers exist for the GB300 currently. RTX A5000 has 32 offers from $0.03 per hour, averaging $0.44 per hour. Availability favors the A5000 now.

What are the power requirements?

GB300 demands 1400W TDP in SXM form for datacenters. RTX A5000 uses 230W TDP in PCIe, fitting workstations. Higher TDP correlates with GB300's performance lead.

Which GPU supports better multi-GPU scaling?

GB300 uses NVSwitch and NVLink for cluster efficiency. RTX A5000 supports NVLink but lacks NVSwitch. This makes GB300 ideal for hyperscale setups.

Which is cheaper to rent, the GB300 or the RTX A5000?

Cloud rental prices for both the GB300 and RTX A5000 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 GB300 have compared to the RTX A5000?

The GB300 has 288 GB of HBM3e memory. The RTX A5000 has 24 GB of GDDR6 memory.

Can I find GB300 and RTX A5000 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 GB300 and the RTX A5000?

The GB300 uses the Blackwell Ultra architecture (2025) while the RTX A5000 uses Ampere (2021). The GB300 delivers 80.9x the FP16 throughput and 15.6x the memory bandwidth of the RTX A5000.