AMD MI455X
vs
Nvidia P40
The MI455X is newer, with 18x the memory and 67x the bandwidth.
At a glance
Memory
18x more on MI455X
- MI455X
- 432 GB
- P40
- 24 GB
Memory bandwidth
67x higher on MI455X
- MI455X
- 23,300 GB/s
- P40
- 346 GB/s
Cheapest on-demand
MI455X is not sold on demand
- MI455X
- --
- P40
- --
Price comparison
Median price per GPU per hour by billing type, with the cheapest listing under it.
Price history
MI455X vs P40 price history
Weekly median on-demand price per GPU per hour
Specs comparison
| Spec | MI455X | P40 | Difference |
|---|---|---|---|
| Memory | |||
| Capacity | 432 GB HBM4 | 24 GB GDDR5 | 18x more on MI455X |
| Bandwidth | 23,300 GB/s | 346 GB/s | 67x higher on MI455X |
| Bus width | 384-bit | ||
| Compute · dense | |||
| FP4 | 40,265 TFLOPS | Not supported | MI455X only |
| FP8 | 20,133 TFLOPS | Not supported | MI455X only |
| FP16 / BF16 | 5,033 TFLOPS | ||
| INT8 | 5,033 TOPS | 47 TOPS | 107x higher on MI455X |
| FP32 | 315 TFLOPS | 12 TFLOPS | 26x higher on MI455X |
| Platform | |||
| Interconnect | Infinity Fabric 3,600 GB/s | PCIe only | Infinity Fabric on MI455X only |
| Released | Q3 2026 | Q3 2016 | 10 years newer on MI455X |
| Precision | |||
| Supported formats | FP4FP6FP8FP16BF16FP32INT8 | FP16FP32INT8 | |
Compute: Vendor peak figures, dense and per GPU. Not measured throughput.
Source: MI455X datasheet and P40 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 | P40 |
|---|---|---|
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 | -- |
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 · 13% less bandwidth than the P40
From $0.32 /GPU/hr Compare
-
Nvidia T4
16 GB GDDR6 · 13% less bandwidth than the P40
From $0.15 /GPU/hr Compare
Our data for AMD MI455X was last updated on Sept. 14, 2026, and for Nvidia P40 on Sept. 14, 2026.