AMD MI455X
vs
Nvidia RTX 3080
The MI455X is newer, with 43x the memory and 31x the bandwidth.
At a glance
Memory
43x more on MI455X
- MI455X
- 432 GB
- RTX 3080
- 10 GB
Memory bandwidth
31x higher on MI455X
- MI455X
- 23,300 GB/s
- RTX 3080
- 760 GB/s
Cheapest on-demand
MI455X is not sold on demand
- MI455X
- --
- RTX 3080
- $0.10 /GPU/hr
Price comparison
Median price per GPU per hour by billing type, with the cheapest listing under it.
| Billing | MI455X | RTX 3080 | Difference |
|---|---|---|---|
| On-demand | No on-demand listings | $0.15 /GPU/hr from $0.10 | |
| Reserved | No reserved listings | -- /GPU/hr from $0.12 (3 mo) | |
| Spot | No spot listings | -- /GPU/hr from $0.06 |
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 3080: 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 3080 price history
Weekly median on-demand price per GPU per hour
Specs comparison
| Spec | MI455X | RTX 3080 | Difference |
|---|---|---|---|
| Memory | |||
| Capacity | 432 GB HBM4 | 10 GB GDDR6X | 43x more on MI455X |
| Bandwidth | 23,300 GB/s | 760 GB/s | 31x higher on MI455X |
| Bus width | 320-bit | ||
| Compute · dense | |||
| FP4 | 40,265 TFLOPS | Not supported | MI455X only |
| FP8 | 20,133 TFLOPS | Not supported | MI455X only |
| FP16 / BF16 | 5,033 TFLOPS | 59.5 TFLOPS | 85x higher on MI455X |
| INT8 | 5,033 TOPS | 238 TOPS | 21x higher on MI455X |
| FP32 | 315 TFLOPS | 29.8 TFLOPS | 11x higher on MI455X |
| Platform | |||
| Interconnect | Infinity Fabric 3,600 GB/s | PCIe only | Infinity Fabric on MI455X only |
| Released | Q3 2026 | Q3 2020 | 6 years newer on MI455X |
| Precision | |||
| Supported formats | FP4FP6FP8FP16BF16FP32INT8 | FP16BF16TF32FP32INT4INT8 | |
Figures are for each model's headline configuration. Where a form factor carries a different number, it is named under the figure.
Compute: Vendor peak figures, dense and per GPU. Not measured throughput.
Source: MI455X datasheet and RTX 3080 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 3080 |
|---|---|---|
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
|
-- | $0.10 /GPU/hr On-demand |
GPU.ai
UAE
|
-- | $0.10 /GPU/hr On-demand |
Salad
Distributed
|
-- | $0.14 /GPU/hr On-demand |
Theta EdgeCloud
Distributed
|
-- | $0.14 /GPU/hr On-demand |
Runpod
USA
|
-- | $0.17 /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 4070
12 GB GDDR6X · 34% less bandwidth than the RTX 3080
From $0.11 /GPU/hr Compare
-
Nvidia RTX 3080 Ti
12 GB GDDR6X · 20% more bandwidth than the RTX 3080
From $0.15 /GPU/hr Compare
Our data for AMD MI455X was last updated on Sept. 14, 2026, and for Nvidia RTX 3080 on Sept. 14, 2026.