AMD MI455X
vs
Nvidia RTX 4080
The MI455X is newer, with 27x the memory and 32x the bandwidth.
At a glance
Memory
27x more on MI455X
- MI455X
- 432 GB
- RTX 4080
- 16 GB
Memory bandwidth
32x higher on MI455X
- MI455X
- 23,300 GB/s
- RTX 4080
- 717 GB/s
Cheapest on-demand
MI455X is not sold on demand
- MI455X
- --
- RTX 4080
- $0.23 /GPU/hr
Price comparison
Median price per GPU per hour by billing type, with the cheapest listing under it.
| Billing | MI455X | RTX 4080 | Difference |
|---|---|---|---|
| On-demand | No on-demand listings | $0.24 /GPU/hr from $0.23 | |
| Reserved | No reserved listings | -- /GPU/hr from $0.35 (6 mo) | |
| Spot | No spot listings | -- /GPU/hr from $0.11 |
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 reserved and spot on the RTX 4080: 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 4080 price history
Weekly median on-demand price per GPU per hour
Specs comparison
| Spec | MI455X | RTX 4080 | Difference |
|---|---|---|---|
| Memory | |||
| Capacity | 432 GB HBM4 | 16 GB GDDR6X | 27x more on MI455X |
| Bandwidth | 23,300 GB/s | 717 GB/s | 32x higher on MI455X |
| Bus width | 256-bit | ||
| Compute · dense | |||
| FP4 | 40,265 TFLOPS | Not supported | MI455X only |
| FP8 | 20,133 TFLOPS | 194.9 TFLOPS | 103x higher on MI455X |
| FP16 / BF16 | 5,033 TFLOPS | 97.5 TFLOPS | 52x higher on MI455X |
| INT8 | 5,033 TOPS | 389.9 TOPS | 13x higher on MI455X |
| FP32 | 315 TFLOPS | 48.7 TFLOPS | 6.5x higher on MI455X |
| Platform | |||
| Interconnect | Infinity Fabric 3,600 GB/s | PCIe only | Infinity Fabric on MI455X only |
| Released | Q3 2026 | Q4 2022 | 4 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 4080 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 4080 |
|---|---|---|
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 | -- |
Salad
Distributed
|
-- | $0.23 /GPU/hr On-demand |
Theta EdgeCloud
Distributed
|
-- | $0.23 /GPU/hr On-demand |
Vast.ai
USA
|
-- | $0.24 /GPU/hr On-demand |
GPUhub
Singapore
|
-- | $0.25 /GPU/hr On-demand |
GPU.ai
UAE
|
-- | $0.34 /GPU/hr On-demand |
SwissGPU
Switzerland
|
-- | $0.24 /GPU/hr On-demand |
Runpod
USA
|
-- | $0.27 /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 RTX 4090
24 GB GDDR6X · 41% more bandwidth than the RTX 4080
From $0.33 /GPU/hr Compare
-
Nvidia RTX 5080
16 GB GDDR7 · 34% more bandwidth than the RTX 4080
From $0.22 /GPU/hr Compare
Our data for AMD MI455X was last updated on Sept. 14, 2026, and for Nvidia RTX 4080 on Sept. 14, 2026.