Can I deploy NVIDIA B300 or NVIDIA A40 on Runcrate today?

NVIDIA B300 is on demand in 1 region from $10.40/hr, billed by the second on most GPUs. NVIDIA A40 is not in stock on Runcrate right now; leave your email on its pricing page to register interest.

How much VRAM does each GPU have?

NVIDIA B300 has 288GB HBM3e. NVIDIA A40 has 48GB GDDR6.

B300 or A40: which holds a 70B model in 8-bit weights?

It needs 70 GB of 8-bit weights. On the B300: 1 GPU, 218 GB spare. On the A40: 2 GPUs (96 GB). Pick the B300: fits on one GPU.

GPU comparison

B300 vs A40.

The B300 is ahead on memory (288 GB vs 48 GB) and speed (15.0x the FP16 throughput and up to 11.5x the memory bandwidth). The A40 makes sense when your model fits in 48 GB and its hourly price is lower.

Launch B300 Reserve a cluster

Rent either on Runcrate

B300from $10.40/hr
$0.036 per GB/hr$0.46 per 100 TFLOPS/hr
Launch B300
A40Not in stock right now
Register interest

Live hourly price, then per GB of memory and per 100 FP16 TFLOPS.

Which is better for

Which to pick for each job. Memory fit and throughput, from the datasheets.

JobB300A40Pick

Hold a 70B model in 8-bit weights
70 GB of 8-bit weights
B300: 1 GPU, 218 GB spare
A40: 2 GPUs (96 GB)
B300. Fits on one GPU.
Serve an 8B model in 16-bit weights
16 GB of 16-bit weights
B300: 1 GPU, 272 GB spare
A40: 1 GPU, 32 GB spare
B300. Same GPU count, up to 11.5x the memory bandwidth.
Fine-tune a 70B model with QLoRA
About 46 GB with 4-bit weights
B300: 1 GPU, 242 GB spare
A40: 1 GPU, 2 GB spare
B300. Same GPU count, 15.0x the FP16 throughput.
Train on a full node
FP16 tensor throughput per node
B300: 8x, 18,000 TFLOPS, NVLink
A40: 4x, 599 TFLOPS
B300. 8 GPUs per node, not 4.
Throughput per watt
FP16 TFLOPS per 100 W of TDP
B300: Varies by card
A40: 50 TFLOPS per 100 W
Either. Varies by card.

Compare another pair

Blackwell

NVIDIA B300

from$10.40/hr

Available now · 1 region

Memory: 288 GB HBM3e
FP16 tensor: 2250 TFLOPS
Bandwidth: up to 8.0 TB/s

Launch B300 Reserve a cluster

Full pricing details

Ampere

NVIDIA A40

Not in stock right now

Memory: 48 GB GDDR6
FP16 tensor: 149.7 TFLOPS
Bandwidth: 696 GB/s

Full pricing details

At a glance

Spec by spec. The longer bar is the better number.

Memory

NVIDIA B300288 GB

NVIDIA A4048 GB

Memory bandwidth

NVIDIA B300up to 8.0 TB/s

NVIDIA A40696 GB/s

FP16 tensor

NVIDIA B3002250 TFLOPS

NVIDIA A40149.7 TFLOPS

FP32

NVIDIA B30075 TFLOPS

NVIDIA A4037.4 TFLOPS

Full specs

The complete spec sheet.

Spec	NVIDIA B300	NVIDIA A40
Architecture	Blackwell	Ampere
Memory	288 GB	48 GB
Memory type	HBM3e	GDDR6
Memory bandwidth	up to 8.0 TB/s	696 GB/s
FP32	75 TFLOPS	37.4 TFLOPS
FP16 tensor	2250 TFLOPS	149.7 TFLOPS
INT8	187.5 TOPS	299 TOPS
TDP	up to 1400 W	300 W
Form factor	SXM	PCIe
NVLink	Yes	No
GPUs per node	8	4
Hourly price (live)	from $10.40/hr	Not in stock right now

Questions

B300 or A40. What buyers ask first.

Other comparisons