AMD MI355X
vs
Nvidia A40
The MI355X is newer, with 6x the memory and 11x the bandwidth. The A40 is cheaper right now.
At a glance
Memory
6x more on MI355X
- MI355X
- 288 GB
- A40
- 48 GB
Memory bandwidth
11x higher on MI355X
- MI355X
- 8,000 GB/s
- A40
- 696 GB/s
Cheapest on-demand
95% cheaper on A40
- MI355X
- $5.99 /GPU/hr
- A40
- $0.28 /GPU/hr
Price comparison
Median price per GPU per hour by billing type, with the cheapest listing under it.
| Billing | MI355X | A40 | Difference |
|---|---|---|---|
| On-demand | -- /GPU/hr from $5.99 | $0.65 /GPU/hr from $0.28 | |
| Reserved | No reserved listings | -- /GPU/hr from $0.61 (24 mo) | |
| Spot | -- /GPU/hr from $2.97 | -- /GPU/hr from $0.27 |
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 on-demand and spot on the MI355X and reserved and spot on the A40: 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
MI355X vs A40 price history
Weekly median on-demand price per GPU per hour
Specs comparison
| Spec | MI355X | A40 | Difference |
|---|---|---|---|
| Memory | |||
| Capacity | 288 GB HBM3e | 48 GB GDDR6 | 6x more on MI355X |
| Bandwidth | 8,000 GB/s | 696 GB/s | 11x higher on MI355X |
| Bus width | 8,192-bit | 384-bit | 21x wider on MI355X |
| Compute · dense | |||
| FP4 | 10,066.3 TFLOPS | Not supported | MI355X only |
| FP8 | 5,033.2 TFLOPS | Not supported | MI355X only |
| FP16 / BF16 | 2,516.6 TFLOPS | 149.7 TFLOPS | 17x higher on MI355X |
| INT8 | 5,033.2 TOPS | 299.3 TOPS | 17x higher on MI355X |
| FP32 | 157.3 TFLOPS | 37.4 TFLOPS | 4.2x higher on MI355X |
| FP64 | 78.6 TFLOPS | Not supported | MI355X only |
| Platform | |||
| Interconnect | Infinity Fabric 1,075 GB/s | PCIe only | Infinity Fabric on MI355X only |
| Board power | 1,400 W | 300 W | 4.7x higher on MI355X |
| Released | Q2 2025 | Q4 2020 | 5 years newer on MI355X |
| Precision | |||
| Supported formats | FP4FP6FP8FP16BF16FP32FP64INT8 | FP16BF16TF32FP32INT4INT8 | |
Compute: Vendor peak figures, dense and per GPU. Not measured throughput.
Source: MI355X datasheet and A40 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 | MI355X | A40 |
|---|---|---|
Daytona
USA
|
$5.99 /GPU/hr On-demand | -- |
Oracle Cloud
USA
|
$8.60 /GPU/hr On-demand | -- |
DigitalOcean
USA
|
$2.97 /GPU/hr Spot | -- |
TensorWave
USA
|
$2.95 /GPU/hr Custom OAM | -- |
Crusoe
USA
|
On request Custom | -- |
Vultr
USA
|
$2.59 /GPU/hr Spot | -- |
Vast.ai
USA
|
-- | $0.28 /GPU/hr On-demand |
GPU.ai
UAE
|
-- | $0.49 /GPU/hr On-demand |
Runpod
USA
|
-- | $0.49 /GPU/hr On-demand |
Sesterce
France
|
-- | $2.05 /GPU/hr On-demand |
Runcrate
USA
|
-- | $2.42 /GPU/hr On-demand PCIe |
Denvr
Canada
|
-- | $0.65 /GPU/hr On-demand |
Exoscale
Switzerland
|
-- | $1.05 /GPU/hr On-demand |
Database Mart
USA
|
-- | $0.61 /GPU/hr Reserved |
6 providers list the MI355X and 9 the A40. Every listing is on the MI355X page and the A40 page.
Similar GPUs
Other comparisons in the same class.
-
Nvidia H100
80 GB HBM3 · 58% less bandwidth than the MI355X
From $1.60 /GPU/hr Compare
-
Nvidia B200
180 GB HBM3e · released Q1 2024
From $3.75 /GPU/hr Compare
-
AMD MI325X
256 GB HBM3e · 25% less bandwidth than the MI355X
From $2.25 /GPU/hr Compare
-
Nvidia RTX 6000 Ada
48 GB GDDR6 · 38% more bandwidth than the A40
From $0.54 /GPU/hr Compare
-
Nvidia L40
48 GB GDDR6 · 24% more bandwidth than the A40
From $0.46 /GPU/hr Compare
Our data for AMD MI355X was last updated on Sept. 14, 2026, and for Nvidia A40 on Sept. 14, 2026.