Can I deploy NVIDIA B300 or NVIDIA RTX 3090 on Runcrate today?

NVIDIA B300 is on demand in 1 region from $11.05/hr, billed by the second on most GPUs. NVIDIA RTX 3090 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 RTX 3090 has 24GB GDDR6X.

B300 or RTX 3090: 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 RTX 3090: 4 GPUs, more than one 2x node. Pick the B300: fits on one GPU.

GPU comparison

B300 vs RTX 3090.

The B300 is ahead on memory (288 GB vs 24 GB) and speed (31.7x the FP16 throughput and up to 8.5x the memory bandwidth). The RTX 3090 makes sense when your model fits in 24 GB and its hourly price is lower.

Launch B300 Reserve a cluster

Rent either on Runcrate

B300from $11.05/hr
$0.038 per GB/hr$0.49 per 100 TFLOPS/hr
Launch B300
RTX 3090Not 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.

JobB300RTX 3090Pick

Hold a 70B model in 8-bit weights
70 GB of 8-bit weights
B300: 1 GPU, 218 GB spare
RTX 3090: 4 GPUs, more than one 2x node
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
RTX 3090: 1 GPU, 8 GB spare
B300. Same GPU count, up to 8.5x the memory bandwidth.
Fine-tune a 70B model with QLoRA
About 46 GB with 4-bit weights
B300: 1 GPU, 242 GB spare
RTX 3090: 2 GPUs (48 GB)
B300. Fits on one GPU.
Train on a full node
FP16 tensor throughput per node
B300: 8x, 18,000 TFLOPS, NVLink
RTX 3090: 2x, 142 TFLOPS, NVLink
B300. 8 GPUs per node, not 2.
Throughput per watt
FP16 TFLOPS per 100 W of TDP
B300: Varies by card
RTX 3090: 20 TFLOPS per 100 W
Either. Varies by card.

Compare another pair

Blackwell

NVIDIA B300

from$11.05/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 RTX 3090

Not in stock right now

Memory: 24 GB GDDR6X
FP16 tensor: 71 TFLOPS
Bandwidth: 936 GB/s

Full pricing details

At a glance

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

Memory

NVIDIA B300288 GB

NVIDIA RTX 309024 GB

Memory bandwidth

NVIDIA B300up to 8.0 TB/s

NVIDIA RTX 3090936 GB/s

FP16 tensor

NVIDIA B3002250 TFLOPS

NVIDIA RTX 309071 TFLOPS

FP32

NVIDIA B30075 TFLOPS

NVIDIA RTX 309035.6 TFLOPS

Full specs

The complete spec sheet.

Spec	NVIDIA B300	NVIDIA RTX 3090
Architecture	Blackwell	Ampere
Memory	288 GB	24 GB
Memory type	HBM3e	GDDR6X
Memory bandwidth	up to 8.0 TB/s	936 GB/s
FP32	75 TFLOPS	35.6 TFLOPS
FP16 tensor	2250 TFLOPS	71 TFLOPS
INT8	187.5 TOPS	284 TOPS
TDP	up to 1400 W	350 W
Form factor	SXM	Consumer
NVLink	Yes	Yes
GPUs per node	8	2
Hourly price (live)	from $11.05/hr	Not in stock right now

Questions

B300 or RTX 3090. What buyers ask first.

Other comparisons