Overview
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.
Nvidia K620
The Nvidia K620 is a workstation GPU on the Maxwell architecture, released Q3 2014, with 2 GB DDR3 and 29 GB/s memory bandwidth.
Memory per GPU
216x more on MI455X
MI455X
K620
Memory bandwidth
803x higher on MI455X
MI455X
K620
GPU interconnect
MI455X
K620
Peak performance (FP32)
366x higher on MI455X
MI455X
K620
Vendor peak figures, dense and per GPU. Not measured throughput.
Precision support
MI455X
K620
Highlighted formats are supported by only one of the two.
Architecture
MI455X
K620
Released
12 years newer on MI455X
MI455X
K620
Source: MI455X datasheet and K620 datasheet.
Price comparison
Providers listing it
MI455X
K620
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.
MI455X Offers
0 of 5 providers report available stock.
K620 Offers
No provider publishes a stock status.
No active offerings found
Similar GPUs
Other comparisons in the same class:
Our data for AMD MI455X was last updated on Sept. 3, 2026, and for Nvidia K620 on Sept. 3, 2026.