Overview
AMD MI300X
The AMD MI300X is a data center GPU on the CDNA 3 architecture, released Q4 2023, with 192 GB HBM3 and 5,300 GB/s memory bandwidth.
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.
Memory per GPU
1.5x more on GB300
MI300X
GB300
Memory bandwidth
1.5x higher on GB300
MI300X
GB300
GPU interconnect
2x higher on GB300
MI300X
GB300
Peak performance (FP8)
1.9x higher on GB300
MI300X
GB300
Vendor peak figures, dense and per GPU. Not measured throughput.
FP8 per watt
Within 5%
MI300X
GB300
Board power
1.9x higher on GB300
MI300X
GB300
Precision support
MI300X
GB300
Highlighted formats are supported by only one of the two.
Architecture
MI300X
GB300
Released
15 months newer on GB300
MI300X
GB300
Source: MI300X datasheet and GB300 datasheet.
Price comparison
Cheapest on-demand
6.9x higher on GB300
MI300X
GB300
Typical rate
6x higher on GB300
MI300X
GB300
Median across providers, one vote each, so a large catalog does not outweigh a small one.
Spot floor
MI300X
GB300
Providers listing it
4 more on MI300X
MI300X
GB300
Price, last 90 days
MI300X
GB300
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:
- Availability: in stock, then waitlist, then not reported, then out of stock. A price you can act on outranks a cheaper one you cannot.
- 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.
- 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.
MI300X Offers
1 of 10 providers report available stock.
GB300 Offers
0 of 6 providers report available stock.
Similar GPUs
Other comparisons in the same class:
Our data for AMD MI300X was last updated on Aug. 31, 2026, and for Nvidia GB300 on Aug. 31, 2026.