AMD MI455X
vs
Nvidia RTX 4000 SFF Ada
A data center GPU against a workstation card, one CDNA 5 and one Ada Lovelace: 432 GB HBM4 against 20 GB GDDR6, 83x the memory bandwidth on the MI455X, and Infinity Fabric 3,600 GB/s on the MI455X where the RTX 4000 SFF Ada is PCIe only.
At a glance
Memory
- MI455X
- 432 GB
- RTX 4000 SFF Ada
- 20 GB
22x more on MI455X
Memory bandwidth
- MI455X
- 23,300 GB/s
- RTX 4000 SFF Ada
- 280 GB/s
83x higher on MI455X
Cheapest on-demand
- MI455X
- --
- RTX 4000 SFF Ada
- $0.18 /GPU/hr
MI455X is not sold on demand
Price comparison
Median price per GPU per hour by billing type, with the cheapest listing under it.
| Billing | MI455X | RTX 4000 SFF Ada | Difference |
|---|---|---|---|
| On-demand | No on-demand listings | $0.43 /GPU/hr from $0.18 |
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. Medians are across providers, one vote each, so a large catalog does not outweigh a small one. Verify before provisioning. More on how we price.
Price history
MI455X vs RTX 4000 SFF Ada price history
Weekly median on-demand price per GPU per hour
Specs comparison
| Spec | MI455X | RTX 4000 SFF Ada | Difference |
|---|---|---|---|
| Memory | |||
| Capacity | 432 GB HBM4 | 20 GB GDDR6 | 22x more on MI455X |
| Bandwidth | 23,300 GB/s | 280 GB/s | 83x higher on MI455X |
| Bus width | 160-bit | ||
| Compute · dense | |||
| FP4 | 40,265 TFLOPS | Not supported | MI455X only |
| FP8 | 20,133 TFLOPS | 153.4 TFLOPS | 131x higher on MI455X |
| FP16 / BF16 | 5,033 TFLOPS | 76.7 TFLOPS | 66x higher on MI455X |
| INT8 | 5,033 TOPS | ||
| FP32 | 315 TFLOPS | 19.2 TFLOPS | 16x higher on MI455X |
| Platform | |||
| Interconnect | Infinity Fabric 3,600 GB/s | PCIe only | Infinity Fabric on MI455X only |
| Released | Q3 2026 | Q2 2023 | 3 years newer on MI455X |
| Precision | |||
| Supported formats | FP4FP6FP8FP16BF16FP32INT8 | FP8FP16BF16TF32FP32INT4INT8 | |
Compute: Vendor peak figures, dense and per GPU. Not measured throughput.
Source: MI455X datasheet and RTX 4000 SFF Ada datasheet.
Where to rent them
Providers listing these GPUs, those with both first, so you can switch without moving clouds.
| Provider | MI455X /GPU/hr | RTX 4000 SFF Ada /GPU/hr |
|---|---|---|
Azure
|
Custom on request | -- |
Cirrascale
|
Custom on request | -- |
Oracle Cloud
|
Custom on request | -- |
TensorWave
|
Custom on request | -- |
Vultr
|
Custom on request | -- |
Runpod
|
-- | On-Demand $0.18 |
Koyeb
|
-- | On-Demand $0.50 |
Hetzner
|
-- | On-Demand $0.43 |
Similar GPUs
Other comparisons in the same class.
-
Nvidia B300
From $6.50 /GPU/hr Compare -
AMD MI355X
From $8.60 /GPU/hr Compare -
Nvidia GB300
From $18.00 /GPU/hr Compare -
Nvidia RTX 4000 Ada
From $0.17 /GPU/hr Compare
Our data for AMD MI455X was last updated on Sept. 14, 2026, and for Nvidia RTX 4000 SFF Ada on Sept. 14, 2026.