AMD MI455X vs Nvidia GB300

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

At a glance

Memory

50% more on MI455X

MI455X: 432 GB

GB300: 288 GB

Memory bandwidth

2.9x higher on MI455X

MI455X: 23.30 TB/s

GB300: 8.00 TB/s

Cheapest on-demand

MI455X is not sold on demand

MI455X: --

GB300: $18.00 /GPU/hr

Price comparison

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

Billing	MI455X	GB300
On-demand	No on-demand listings	-- /GPU/hr from $18.00
Reserved	No reserved listings	On request
Spot	No spot listings	Sold out

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 GB300: 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 GB300 price history

Weekly median on-demand price per GPU per hour

Last 2 months

Aggregating historical prices...

Specs comparison

Spec	MI455X	GB300	Difference
Memory
Capacity	432 GB HBM4	288 GB HBM3e	50% more on MI455X
Bandwidth	23,300 GB/s	8,000 GB/s	2.9x higher on MI455X
Bus width		8,192-bit
Compute · dense
FP4	40,265 TFLOPS	15,000 TFLOPS	2.7x higher on MI455X
FP8	20,133 TFLOPS	5,000 TFLOPS	4x higher on MI455X
FP16 / BF16	5,033 TFLOPS	2,500 TFLOPS	2x higher on MI455X
INT8	5,033 TOPS	165 TOPS	31x higher on MI455X
FP32	315 TFLOPS	80 TFLOPS	3.9x higher on MI455X
FP64	Not supported	1.3 TFLOPS	GB300 only
Platform
Interconnect	Infinity Fabric 3,600 GB/s	NVLink 1,800 GB/s	2x higher on MI455X
Released	Q3 2026	Q1 2025	16 months newer on MI455X
Precision
Supported formats	FP4FP6FP8FP16BF16FP32INT8	FP4FP6FP8FP16BF16TF32FP32FP64INT8

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

Source: MI455X datasheet and GB300 datasheet.

Where to rent them

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

Provider	MI455X	GB300
Oracle Cloud USA	On request Custom	$18.00 /GPU/hr On-demand NVL
Azure USA	On request Custom	--
Cirrascale USA	On request Custom	--
TensorWave USA	On request Custom	--
Vultr USA	On request Custom	--
AWS USA	--	On request Reserved
CoreWeave USA	--	On request Custom NVL
Gcore Luxembourg	--	On request Custom NVL
Nebius Netherlands	--	On request Custom NVL
Together AI USA	--	On request Custom NVL
Verda Finland	--	$9.53 /GPU/hr On-demand SXM