AMD MI455X
vs
Nvidia RTX PRO 4000 SFF
The MI455X has 18x the memory and 54x the bandwidth.
At a glance
Memory
18x more on MI455X
- MI455X
- 432 GB
- RTX PRO 4000 SFF
- 24 GB
Memory bandwidth
54x higher on MI455X
- MI455X
- 23,300 GB/s
- RTX PRO 4000 SFF
- 432 GB/s
Cheapest on-demand
MI455X is not sold on demand
- MI455X
- --
- RTX PRO 4000 SFF
- $0.38 /GPU/hr
Price comparison
Median price per GPU per hour by billing type, with the cheapest listing under it.
| Billing | MI455X | RTX PRO 4000 SFF | Difference |
|---|---|---|---|
| On-demand | No on-demand listings | -- /GPU/hr from $0.38 |
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 on the RTX PRO 4000 SFF: we only show one when at least 3 providers list the GPU on that billing type. Verify before provisioning. More on how we price.
Specs comparison
| Spec | MI455X | RTX PRO 4000 SFF | Difference |
|---|---|---|---|
| Memory | |||
| Capacity | 432 GB HBM4 | 24 GB GDDR7 | 18x more on MI455X |
| Bandwidth | 23,300 GB/s | 432 GB/s | 54x higher on MI455X |
| Bus width | 192-bit | ||
| Compute · dense | |||
| FP4 | 40,265 TFLOPS | 385 TFLOPS | 105x higher on MI455X |
| FP8 | 20,133 TFLOPS | 192.5 TFLOPS | 105x higher on MI455X |
| FP16 / BF16 | 5,033 TFLOPS | 96.3 TFLOPS | 52x higher on MI455X |
| INT8 | 5,033 TOPS | 192.5 TOPS | 26x higher on MI455X |
| FP32 | 315 TFLOPS | 24 TFLOPS | 13x higher on MI455X |
| Platform | |||
| Interconnect | Infinity Fabric 3,600 GB/s | PCIe only | Infinity Fabric on MI455X only |
| Released | Q3 2026 | Q3 2025 | 11 months newer on MI455X |
| Precision | |||
| Supported formats | FP4FP6FP8FP16BF16FP32INT8 | FP4FP8FP16BF16TF32FP32INT8 | |
Compute: Vendor peak figures, dense and per GPU. Not measured throughput.
Source: MI455X datasheet and RTX PRO 4000 SFF 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 PRO 4000 SFF |
|---|---|---|
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 | -- |
Hetzner
Germany
|
-- | $0.38 /GPU/hr On-demand |
Similar GPUs
Other comparisons in the same class.
-
-
Nvidia GB300
288 GB HBM3e · 66% less bandwidth than the MI455X
On-demand from $18.00 /GPU/hr
-
-
Nvidia RTX PRO 4000
24 GB GDDR7 · 56% more bandwidth than the RTX PRO 4000 SFF
On-demand from $0.27 /GPU/hr
Our data for AMD MI455X was last updated on Sept. 14, 2026, and for Nvidia RTX PRO 4000 SFF on Nov. 9, 2026.