Nvidia logo

B300 vs GB300

Both use Blackwell Ultra GPUs with 288GB HBM3e. The B300 ships in standard x86 systems, while the GB300 pairs the GPUs with Grace CPUs in a 72-GPU NVLink rack. Choose B300 for conventional server form factors, GB300 for rack-scale unified deployment.

Overview

Nvidia logo Nvidia B300

The Nvidia B300 is a data center GPU on the Blackwell Ultra architecture, released Q1 2025, with up to 288 GB HBM3e and 8,000 GB/s memory bandwidth.

High Performance Datacenter

Nvidia logo Nvidia GB300

The Nvidia GB300 is a data center GPU on the Grace Blackwell Ultra architecture, released Q1 2025, with 288 GB HBM3e and 8,000 GB/s memory bandwidth.

High Performance Datacenter

Memory per GPU

Identical
Nvidia logo B300
288 GB HBM3e
Nvidia logo GB300
288 GB HBM3e

Memory bandwidth

Identical
Nvidia logo B300
8,000 GB/s
Nvidia logo GB300
8,000 GB/s

GPU interconnect

Identical
Nvidia logo B300
NVLink 1,800 GB/s
Nvidia logo GB300
NVLink 1,800 GB/s

Peak performance (FP4)

1.1x higher on GB300
Nvidia logo B300
14,000 TFLOPS
Nvidia logo GB300
15,000 TFLOPS

Vendor peak figures, dense and per GPU. Not measured throughput.

FP4 per watt

1.2x higher on B300
Nvidia logo B300
12.73 TFLOPS/W
Nvidia logo GB300
10.71 TFLOPS/W

Board power

1.3x higher on GB300
Nvidia logo B300
1,100 W
Nvidia logo GB300
1,400 W

Precision support

Nvidia logo B300
FP4 FP6 FP8 FP16 BF16 TF32 FP32 FP64 INT8
Nvidia logo GB300
FP4 FP6 FP8 FP16 BF16 TF32 FP32 FP64 INT8

Highlighted formats are supported by only one of the two.

Architecture

Nvidia logo B300
Blackwell Ultra
Nvidia logo GB300
Grace Blackwell Ultra

Released

Nvidia logo B300
Q1 2025
Nvidia logo GB300
Q1 2025

Price comparison

Cheapest on-demand

2.8x higher on GB300
Nvidia logo B300
$6.50 / GPU / hr
Nvidia logo GB300
$18.00 / GPU / hr

Typical rate

2.4x higher on GB300
Nvidia logo B300
$7.50 / GPU / hr
Nvidia logo GB300
$18.00 / GPU / hr

Median across providers, one vote each, so a large catalog does not outweigh a small one.

Spot floor

Nvidia logo B300
$4.30 / GPU / hr
Nvidia logo GB300
No spot listings

Providers listing it

20 more on B300
Nvidia logo B300
26
Nvidia logo GB300
6

Price, last 90 days

Nvidia logo B300
−2%
Nvidia logo GB300
Not enough history yet

Change in the market-wide median, which moves when providers reprice and when cheaper or more expensive listings enter the market.

Heads up: A provider's own page may quote a different figure, for example on tax, region or a promotion. A monthly-only plan shows a derived hourly rate. Verify before provisioning. More on how we price.

Offers and availability

How this list works

Order

Each provider appears once per GPU. We pick the one configuration that speaks for that provider, and rank on it in this order:

  1. Availability: in stock, then waitlist, then not reported, then out of stock. A price you can act on outranks a cheaper one you cannot.
  2. Billing type: on-demand first, then reserved, then spot, then quote-only. On-demand leads because it is the only rate you can hold without committing to anything.
  3. Price: the lowest per-GPU hourly rate the provider lists, converted to USD.

The configuration we pick is chosen the same way, availability before billing before price. The rest of that provider's configurations are on the GPU's own page.

Ties sort alphabetically. Reserved rates are not separated by term length, so a three-year commitment can sit above a one-month one: the label beneath each price says which you are looking at. Providers who publish no rate are listed last within their group.

Transparency and funding

  • Ads and sponsors: Paid placements sit at the top of the list and are always labeled as sponsored content. Sponsorship never influences the organic ranking itself.
  • Affiliates: Affiliate links are marked. We may earn a commission if you click them, but commissions never affect the order.
  • Prices: Shown in USD, converted at daily reference rates where a provider publishes in another currency. A month means 720 hours. How we estimate costs.

Similar GPUs

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Our data for Nvidia B300 was last updated on Aug. 31, 2026, and for Nvidia GB300 on Aug. 31, 2026.