AMD MI355X vs AMD MI455X

The MI455X is newer, with 50% more memory and 2.9x the bandwidth.

At a glance

Memory

50% more on MI455X

MI355X: 288 GB

MI455X: 432 GB

Memory bandwidth

2.9x higher on MI455X

MI355X: 8.00 TB/s

MI455X: 23.30 TB/s

Cheapest on-demand

MI455X is not sold on demand

MI355X: $5.99 /GPU/hr

MI455X: --

Price comparison

Median price per GPU per hour by billing type, with the cheapest listing under it.

Billing	MI355X	MI455X	Difference
On-demand	-- /GPU/hr from $5.99	No on-demand listings
Spot	-- /GPU/hr from $2.97	No spot listings

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: 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 MI455X price history

Weekly median on-demand price per GPU per hour

Last 11 months

Aggregating historical prices...

Specs comparison

Spec	MI355X	MI455X	Difference
Memory
Capacity	288 GB HBM3e	432 GB HBM4	50% more on MI455X
Bandwidth	8,000 GB/s	23,300 GB/s	2.9x higher on MI455X
Bus width	8,192-bit
Compute · dense
FP4	10,066.3 TFLOPS	40,265 TFLOPS	4x higher on MI455X
FP8	5,033.2 TFLOPS	20,133 TFLOPS	4x higher on MI455X
FP16 / BF16	2,516.6 TFLOPS	5,033 TFLOPS	2x higher on MI455X
INT8	5,033.2 TOPS	5,033 TOPS	Within 5%
FP32	157.3 TFLOPS	315 TFLOPS	2x higher on MI455X
FP64	78.6 TFLOPS	Not supported	MI355X only
Platform
Interconnect	Infinity Fabric 1,075 GB/s	Infinity Fabric 3,600 GB/s	3.3x higher on MI455X
Released	Q2 2025	Q3 2026	13 months newer on MI455X
Precision
Supported formats	FP4FP6FP8FP16BF16FP32FP64INT8	FP4FP6FP8FP16BF16FP32INT8

Compute: Vendor peak figures, dense and per GPU. Not measured throughput.

Source: MI355X datasheet and MI455X datasheet.

Where to rent them

Providers that rent these GPUs, with each one's cheapest rate. Providers that rent both are listed first.

Provider	MI355X	MI455X
Oracle Cloud USA	$8.60 /GPU/hr On-demand	On request Custom
TensorWave USA	$2.95 /GPU/hr Custom OAM	On request Custom
Vultr USA	$2.59 /GPU/hr Spot	On request Custom
Daytona USA	$5.99 /GPU/hr On-demand	--
DigitalOcean USA	$2.97 /GPU/hr Spot	--
Azure USA	--	On request Custom
Cirrascale USA	--	On request Custom