The MI455X is newer, with 2.2x the memory and 4.4x the bandwidth.
At a glance
Memory
2.2x more on MI455X
- MI300X
- 192 GB
- MI455X
- 432 GB
Memory bandwidth
4.4x higher on MI455X
- MI300X
- 5.30 TB/s
- MI455X
- 23.30 TB/s
Cheapest on-demand
MI455X is not sold on demand
- MI300X
- $2.59 /GPU/hr
- MI455X
- --
Price comparison
Median price per GPU per hour by billing type, with the cheapest listing under it.
| Billing | MI300X | MI455X | Difference |
|---|---|---|---|
| On-demand | $4.41 /GPU/hr from $2.59 | No on-demand listings | |
| Reserved | $2.80 /GPU/hr from $1.61 (12 mo) | No reserved listings | |
| Spot | -- /GPU/hr from $1.60 | No spot listings |
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 spot on the MI300X: 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
MI300X vs MI455X price history
Weekly median on-demand price per GPU per hour
Specs comparison
| Spec | MI300X | MI455X | Difference |
|---|---|---|---|
| Memory | |||
| Capacity | 192 GB HBM3 | 432 GB HBM4 | 2.2x more on MI455X |
| Bandwidth | 5,300 GB/s | 23,300 GB/s | 4.4x higher on MI455X |
| Bus width | 8,192-bit | ||
| Compute · dense | |||
| FP4 | Not supported | 40,265 TFLOPS | MI455X only |
| FP8 | 2,614.9 TFLOPS | 20,133 TFLOPS | 7.7x higher on MI455X |
| FP16 / BF16 | 1,307.4 TFLOPS | 5,033 TFLOPS | 3.8x higher on MI455X |
| INT8 | 2,614.9 TOPS | 5,033 TOPS | 92% higher on MI455X |
| FP32 | 163.4 TFLOPS | 315 TFLOPS | 93% higher on MI455X |
| FP64 | 81.7 TFLOPS | Not supported | MI300X only |
| Platform | |||
| Interconnect | Infinity Fabric 896 GB/s | Infinity Fabric 3,600 GB/s | 4x higher on MI455X |
| Released | Q4 2023 | Q3 2026 | 3 years newer on MI455X |
| Precision | |||
| Supported formats | FP8FP16BF16TF32FP32FP64INT8 | FP4FP6FP8FP16BF16FP32INT8 | |
Compute: Vendor peak figures, dense and per GPU. Not measured throughput.
Source: MI300X datasheet and MI455X datasheet.
Where to rent them
Providers that rent these GPUs, with each one's cheapest rate. Providers that rent both are listed first.
| Provider | MI300X | MI455X |
|---|---|---|
Azure
USA
|
$7.86 /GPU/hr On-demand | On request Custom |
Cirrascale
USA
|
$3.12 /GPU/hr Reserved | On request Custom |
Oracle Cloud
USA
|
$6.00 /GPU/hr On-demand | On request Custom |
Denvr
Canada
|
On request Custom | -- |
DigitalOcean
USA
|
$2.59 /GPU/hr On-demand | -- |
Cyfuture AI
India
|
$2.77 /GPU/hr On-demand | -- |
Crusoe
USA
|
On request Reserved | -- |
Runpod
USA
|
On request Reserved | -- |
TensorWave
USA
|
-- | On request Custom |
Vultr
USA
|
-- | On request Custom |
11 providers list the MI300X and 5 the MI455X. Every listing is on the MI300X page and the MI455X page.
Similar GPUs
Other comparisons in the same class.
-
Nvidia H100
80 GB HBM3 · 37% less bandwidth than the MI300X
From $1.30 /GPU/hr Compare -
Nvidia A100
80 GB HBM2e · 63% less bandwidth than the MI300X
From $0.43 /GPU/hr Compare
-
AMD MI325X
256 GB HBM3e · released Q4 2024
From $2.25 /GPU/hr Compare -
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
Our data for AMD MI300X was last updated on Sept. 14, 2026, and for AMD MI455X on Sept. 14, 2026.