AMD MI455X
vs
Nvidia K620
The MI455X is newer, with 216x the memory and 803x the bandwidth.
At a glance
Memory
216x more on MI455X
- MI455X
- 432 GB
- K620
- 2 GB
Memory bandwidth
803x higher on MI455X
- MI455X
- 23,300 GB/s
- K620
- 29 GB/s
Cheapest on-demand
MI455X is not sold on demand
- MI455X
- --
- K620
- --
Price comparison
Median price per GPU per hour by billing type, with the cheapest listing under it.
Price history
MI455X vs K620 price history
Weekly median on-demand price per GPU per hour
Specs comparison
| Spec | MI455X | K620 | Difference |
|---|---|---|---|
| Memory | |||
| Capacity | 432 GB HBM4 | 2 GB DDR3 | 216x more on MI455X |
| Bandwidth | 23,300 GB/s | 29 GB/s | 803x higher on MI455X |
| Bus width | 128-bit | ||
| Compute · dense | |||
| FP4 | 40,265 TFLOPS | Not supported | MI455X only |
| FP8 | 20,133 TFLOPS | Not supported | MI455X only |
| FP16 / BF16 | 5,033 TFLOPS | Not supported | MI455X only |
| INT8 | 5,033 TOPS | Not supported | MI455X only |
| FP32 | 315 TFLOPS | 0.9 TFLOPS | 366x higher on MI455X |
| Platform | |||
| Interconnect | Infinity Fabric 3,600 GB/s | PCIe only | Infinity Fabric on MI455X only |
| Released | Q3 2026 | Q3 2014 | 12 years newer on MI455X |
| Precision | |||
| Supported formats | FP4FP6FP8FP16BF16FP32INT8 | FP32 | |
Compute: Vendor peak figures, dense and per GPU. Not measured throughput.
Source: MI455X datasheet and K620 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 | K620 |
|---|---|---|
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
Our data for AMD MI455X was last updated on Sept. 14, 2026, and for Nvidia K620 on Sept. 14, 2026.