AMD MI455X
vs
Nvidia RTX 4500 Ada
The MI455X is newer, with 18x the memory and 54x the bandwidth.
At a glance
Memory
18x more on MI455X
- MI455X
- 432 GB
- RTX 4500 Ada
- 24 GB
Memory bandwidth
54x higher on MI455X
- MI455X
- 23,300 GB/s
- RTX 4500 Ada
- 432 GB/s
Cheapest on-demand
MI455X is not sold on demand
- MI455X
- --
- RTX 4500 Ada
- $0.29 /GPU/hr
Price comparison
Median price per GPU per hour by billing type, with the cheapest listing under it.
| Billing | MI455X | RTX 4500 Ada | Difference |
|---|---|---|---|
| On-demand | No on-demand listings | -- /GPU/hr from $0.29 | |
| Spot | No spot listings | -- /GPU/hr from $0.13 |
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. No median for on-demand and spot on the RTX 4500 Ada: we only show one when at least 3 providers list the GPU on that billing type. Verify before provisioning. More on how we price.
Price history
MI455X vs RTX 4500 Ada price history
Weekly median on-demand price per GPU per hour
Specs comparison
| Spec | MI455X | RTX 4500 Ada | Difference |
|---|---|---|---|
| Memory | |||
| Capacity | 432 GB HBM4 | 24 GB GDDR6 | 18x more on MI455X |
| Bandwidth | 23,300 GB/s | 432 GB/s | 54x higher on MI455X |
| Bus width | 192-bit | ||
| Compute · dense | |||
| FP4 | 40,265 TFLOPS | Not supported | MI455X only |
| FP8 | 20,133 TFLOPS | 317 TFLOPS | 64x higher on MI455X |
| FP16 / BF16 | 5,033 TFLOPS | 158.5 TFLOPS | 32x higher on MI455X |
| INT8 | 5,033 TOPS | ||
| FP32 | 315 TFLOPS | 39.6 TFLOPS | 8x higher on MI455X |
| Platform | |||
| Interconnect | Infinity Fabric 3,600 GB/s | PCIe only | Infinity Fabric on MI455X only |
| Released | Q3 2026 | Q3 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 4500 Ada datasheet.
Where to rent them
Providers that rent these GPUs, with each one's cheapest rate. No provider we track offers both right now.
| Provider | MI455X | RTX 4500 Ada |
|---|---|---|
Azure
USA
|
On request Custom | -- |
Cirrascale
USA
|
On request Custom | -- |
Oracle Cloud
USA
|
On request Custom | -- |
TensorWave
USA
|
On request Custom | -- |
Vultr
USA
|
On request Custom | -- |
Vast.ai
USA
|
-- | $0.29 /GPU/hr On-demand |
Similar GPUs
Other comparisons in the same class.
-
Nvidia B300
288 GB HBM3e · 66% less bandwidth than the MI455X
From $4.99 /GPU/hr Compare
-
AMD MI355X
288 GB HBM3e · 66% less bandwidth than the MI455X
From $5.99 /GPU/hr Compare
-
Nvidia GB300
288 GB HBM3e · 66% less bandwidth than the MI455X
From $18.00 /GPU/hr Compare
-
Nvidia L4
24 GB GDDR6 · 31% less bandwidth than the RTX 4500 Ada
From $0.32 /GPU/hr Compare
-
Nvidia A4000
16 GB GDDR6 · released Q2 2021
From $0.08 /GPU/hr Compare
Our data for AMD MI455X was last updated on Sept. 14, 2026, and for Nvidia RTX 4500 Ada on Sept. 14, 2026.