B300 SXM6 vs RTX A5000

Blackwell UltravsAmpereUpdated 35 days ago

The NVIDIA B300 emerges as the superior choice for most contemporary AI workloads, including LLM training and inference, due to its 288 GB VRAM, 2250 TFLOPS FP16, and 12000 GB/s bandwidth that enable handling of massive models unattainable on the A5000. While the A5000's low $0.02 per hour pricing appeals to entry-level needs, the B300's performance justifies $2.45 per hour for production-scale deployments.

B300 SXM6 from $7.39/hrRTX A5000 from $0.23/hr

Specifications Compared

SpecB300RTX-A5000
TDP1200W230W
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 B300's FP16 performance of 2250 TFLOPS vastly outpaces the A5000's 27.8 TFLOPS, making it ideal for AI training where half-precision computations dominate: training large language models on the B300 proceeds over 80 times faster per GPU. Its FP32 rate of 90 TFLOPS exceeds the A5000's 27.8 TFLOPS, benefiting simulation tasks requiring single-precision accuracy. The FP8 capability at 4500 TFLOPS on the B300 accelerates inference for quantized models, a feature absent or limited on the older A5000.

Memory specifications transform real-world usage: 288 GB HBM3e VRAM on the B300 supports batch sizes for models with billions of parameters without swapping, while the A5000's 24 GB GDDR6 restricts it to smaller datasets or lower resolutions. Bandwidth of 12000 GB/s versus 768 GB/s ensures the B300 sustains high throughput during data loading, reducing bottlenecks in training loops by over 15 times. The B300's 1200W TDP demands robust cooling and power, contrasting the A5000's efficient 230W for edge deployments.

Interconnects underscore scalability: NVSwitch and NVLink on the B300 enable multi-GPU clusters with seamless scaling, unlike the A5000's PCIe form factor limited to single-node workstations.

Live Cloud Pricing

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

B300 SXM6

ProviderGPU ModelVRAMHost SpecsRegionPriceStatusAction
RunPod
RunPod
NVIDIA B300 SXM6
262GB VRAM
$7.39/GPU/hr
VERDA
VERDA
NVIDIA B300 SXM6
262GB VRAM
$7.50/GPU/hr
Available
VERDA
VERDA
2×NVIDIA B300 SXM6
262GB VRAM
$7.50/GPU/hr
$15.00/hr total (2×)
Available
VERDA
VERDA
8×NVIDIA B300 SXM6
262GB VRAM
$7.50/GPU/hr
$60.00/hr total (8×)
Available
Scaleway
Scaleway
8×NVIDIA B300 SXM6
262GB VRAM
$8.73/GPU/hr
$69.84/hr total (8×)
Available

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
Vast.ai
Vast.ai
NVIDIA RTX A5000
24GB VRAM
$0.24/GPU/hr
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×)

Compare real-time pricing across 25+ providers

When to Choose the B300 SXM6

Opt for the NVIDIA B300 in large-scale AI training or inference where models exceed 100 billion parameters: its 288 GB HBM3e VRAM and 12000 GB/s bandwidth handle massive batch sizes without offloading. Datacenter environments with NVSwitch and NVLink benefit from its 2250 TFLOPS FP16 for rapid iteration on LLMs. Cloud pricing at $2.45 per hour suits enterprises prioritizing throughput over cost.

When to Choose the RTX A5000

The NVIDIA RTX A5000 excels in budget-conscious workstation tasks like prototyping or fine-tuning smaller models under 10 billion parameters, fitting within its 24 GB GDDR6 VRAM. Its 230W TDP and PCIe form factor integrate easily into desktops without high power infrastructure. At $0.02 per hour average $0.41 per hour, it offers value for individual developers or infrequent use.

Use Cases

LLM Training
B300 SXM6

The B300's 288 GB HBM3e VRAM and 2250 TFLOPS FP16 support training models over 100 billion parameters with large batch sizes. The A5000's 24 GB limits it to much smaller scales.

LLM Inference
B300 SXM6

4500 TFLOPS FP8 and 12000 GB/s bandwidth on the B300 enable high-throughput serving of quantized LLMs. The A5000's 27.8 TFLOPS FP16 cannot match this scale.

Fine-tuning
Either

Fine-tuning mid-sized models fits the A5000's 24 GB VRAM at low cost of $0.02 per hour; B300's excess capacity shines for parameter-efficient methods on larger models.

Stable Diffusion
RTX A5000

The A5000's 27.8 TFLOPS FP16 and 24 GB VRAM suffice for image generation at 768 GB/s bandwidth in workstations. B300's power is overkill for single-user creative tasks.

Scientific Computing
B300 SXM6

B300's 90 TFLOPS FP32 and NVLink scaling accelerate simulations with large datasets. A5000 handles modest computations but lacks bandwidth for complex grids.

Frequently Asked Questions

Which GPU has more VRAM: B300 or RTX A5000?

The B300 provides 288 GB of HBM3e VRAM, exceeding the RTX A5000's 24 GB GDDR6 by over 12 times. This allows the B300 to load massive AI models without memory constraints.

How do their memory bandwidths compare?

B300 delivers 12000 GB/s, about 15.6 times higher than the A5000's 768 GB/s. Higher bandwidth reduces data transfer bottlenecks in training.

What is the FP16 performance difference?

B300 achieves 2250 TFLOPS in FP16 versus the A5000's 27.8 TFLOPS, a ratio of over 81 times. This gap favors B300 for deep learning acceleration.

Which is cheaper in the cloud?

RTX A5000 starts at $0.02 per hour with $0.41 average across 35 offers, far below B300's $2.45 per hour and $6.44 average across 7 offers. A5000 suits cost-sensitive tasks.

What are the power requirements?

B300 has a 1200W TDP requiring datacenter cooling, while A5000's 230W fits standard workstations. Power efficiency favors A5000 for edge use.

Can these GPUs be used in multi-GPU setups?

B300 supports NVSwitch and NVLink for scalable clusters; A5000 uses NVLink but in PCIe form factor limits cluster size. B300 excels in large-scale interconnects.

Which is cheaper to rent, the B300 or the RTX A5000?

Cloud rental prices for both the B300 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 B300 have compared to the RTX A5000?

The B300 has 288 GB of HBM3e memory. The RTX A5000 has 24 GB of GDDR6 memory.

Can I find B300 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 B300 and the RTX A5000?

The B300 uses the Blackwell Ultra architecture (2025) while the RTX A5000 uses Ampere (2021). The B300 delivers 80.9x the FP16 throughput and 15.6x the memory bandwidth of the RTX A5000.

B300 SXM6 vs RTX A5000: 80.9x FP16 Gap, 288GB vs 24GB | GPUPerHour