AMD MI455X
vs
Nvidia GTX 1660 Ti
The MI455X is newer, with 72x the memory and 81x the bandwidth.
At a glance
Memory
72x more on MI455X
- MI455X
- 432 GB
- GTX 1660 Ti
- 6 GB
Memory bandwidth
81x higher on MI455X
- MI455X
- 23,300 GB/s
- GTX 1660 Ti
- 288 GB/s
Cheapest on-demand
MI455X is not sold on demand
- MI455X
- --
- GTX 1660 Ti
- --
Price comparison
Median price per GPU per hour by billing type, with the cheapest listing under it.
Specs comparison
| Spec | MI455X | GTX 1660 Ti | Difference |
|---|---|---|---|
| Memory | |||
| Capacity | 432 GB HBM4 | 6 GB GDDR6 | 72x more on MI455X |
| Bandwidth | 23,300 GB/s | 288 GB/s | 81x higher on MI455X |
| Bus width | 192-bit | ||
| Compute · dense | |||
| FP4 | 40,265 TFLOPS | Not supported | MI455X only |
| FP8 | 20,133 TFLOPS | Not supported | MI455X only |
| FP16 / BF16 | 5,033 TFLOPS | 10.9 TFLOPS | 463x higher on MI455X |
| INT8 | 5,033 TOPS | Not supported | MI455X only |
| FP32 | 315 TFLOPS | 5.4 TFLOPS | 58x higher on MI455X |
| Platform | |||
| Interconnect | Infinity Fabric 3,600 GB/s | PCIe only | Infinity Fabric on MI455X only |
| Released | Q3 2026 | Q1 2019 | 7 years newer on MI455X |
| Precision | |||
| Supported formats | FP4FP6FP8FP16BF16FP32INT8 | FP16FP32 | |
Compute: Vendor peak figures, dense and per GPU. Not measured throughput.
Source: MI455X datasheet and GTX 1660 Ti 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 | GTX 1660 Ti |
|---|---|---|
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 GB300
288 GB HBM3e · 66% less bandwidth than the MI455X
On-demand from $18.00 /GPU/hr
-
-
Nvidia RTX 3060
12 GB GDDR6 · 25% more bandwidth than the GTX 1660 Ti
On-demand from $0.08 /GPU/hr
-
Nvidia RTX 2060
6 GB GDDR6 · 17% more bandwidth than the GTX 1660 Ti
On-demand from $0.06 /GPU/hr
Our data for AMD MI455X was last updated on Sept. 14, 2026, and for Nvidia GTX 1660 Ti on Nov. 13, 2026.