Overview

AMD logo AMD MI455X

The AMD MI455X is a data center GPU on the CDNA 5 architecture, released Q3 2026, with 432 GB HBM4 and 23,300 GB/s memory bandwidth.

High Performance Datacenter

Nvidia logo Nvidia A100

The Nvidia A100 is a data center GPU on the Ampere architecture, released Q2 2020, with 80 GB HBM2e and 1,935 GB/s memory bandwidth on the PCIe variant.

High Performance Datacenter

Memory per GPU

5.4x more on MI455X
AMD logo MI455X
432 GB HBM4
Nvidia logo A100
80 GB HBM2e 40 GB on SXM, PCIe

Memory bandwidth

12x higher on MI455X
AMD logo MI455X
23,300 GB/s
Nvidia logo A100
1,935 GB/s 2,039 GB/s on SXM 1,555 GB/s on SXM, PCIe

GPU interconnect

6x higher on MI455X
AMD logo MI455X
Infinity Fabric 3,600 GB/s
Nvidia logo A100
NVLink 600 GB/s

Peak performance (FP16)

16x higher on MI455X
AMD logo MI455X
5,033 TFLOPS
Nvidia logo A100
312 TFLOPS

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

Precision support

AMD logo MI455X
FP4 FP6 FP8 FP16 BF16 FP32 INT8
Nvidia logo A100
FP16 BF16 TF32 FP32 FP64 INT4 INT8

Highlighted formats are supported by only one of the two.

Architecture

AMD logo MI455X
CDNA 5
Nvidia logo A100
Ampere

Released

6 years newer on MI455X
AMD logo MI455X
Q3 2026
Nvidia logo A100
Q2 2020

Figures are for each model's headline configuration. Where a form factor carries a different number, it is named under the figure.

Source: MI455X datasheet and A100 datasheet.

Price comparison

Cheapest on-demand

AMD logo MI455X
--
Nvidia logo A100
$0.53 / GPU / hr

Typical rate

AMD logo MI455X
--
Nvidia logo A100
$1.79 / GPU / hr

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

Spot floor

AMD logo MI455X
No spot listings
Nvidia logo A100
$0.13 / GPU / hr

Providers listing it

38 more on A100
AMD logo MI455X
5
Nvidia logo A100
43

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

Other comparisons in the same class:

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Our data for AMD MI455X was last updated on Sept. 3, 2026, and for Nvidia A100 on Sept. 3, 2026.