AMD MI355X vs Nvidia RTX 4090

The MI355X is newer, with 12x the memory and 7.9x the bandwidth. The RTX 4090 is cheaper right now.

At a glance

Memory

12x more on MI355X

MI355X: 288 GB

RTX 4090: 24 GB

Memory bandwidth

7.9x higher on MI355X

MI355X: 8.00 TB/s

RTX 4090: 1.01 TB/s

Cheapest on-demand

94% cheaper on RTX 4090

MI355X: $5.99 /GPU/hr

RTX 4090: $0.33 /GPU/hr

Price comparison

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

Billing	MI355X	RTX 4090
On-demand	-- /GPU/hr from $5.99	$0.47 /GPU/hr from $0.33
Reserved	No reserved listings	$0.52 /GPU/hr from $0.33 (6 mo)
Spot	-- /GPU/hr from $2.97	$0.33 /GPU/hr from $0.16

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 RTX 4090 price history

Weekly median on-demand price per GPU per hour

Last 12 months

Aggregating historical prices...

Specs comparison

Spec	MI355X	RTX 4090	Difference
Memory
Capacity	288 GB HBM3e	24 GB GDDR6X	12x more on MI355X
Bandwidth	8,000 GB/s	1,010 GB/s	7.9x 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	330.3 TFLOPS	15x higher on MI355X
FP16 / BF16	2,516.6 TFLOPS	165.2 TFLOPS	15x higher on MI355X
INT8	5,033.2 TOPS	660.6 TOPS	7.6x higher on MI355X
FP32	157.3 TFLOPS	82.6 TFLOPS	90% 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	450 W	3.1x higher on MI355X
Released	Q2 2025	Q4 2022	3 years newer on MI355X
Precision
Supported formats	FP4FP6FP8FP16BF16FP32FP64INT8	FP8FP16BF16TF32FP32INT4INT8

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

Source: MI355X datasheet and RTX 4090 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	RTX 4090
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	--
Salad Distributed	--	$0.33 /GPU/hr On-demand
Vast.ai USA	--	$0.33 /GPU/hr On-demand
GPU.ai UAE	--	$0.34 /GPU/hr On-demand
Runpod USA	--	$0.34 /GPU/hr On-demand
Theta EdgeCloud Distributed	--	$0.38 /GPU/hr On-demand
Packet·ai USA	--	$0.39 /GPU/hr On-demand
Lium Distributed	--	$0.40 /GPU/hr On-demand
Oblivus USA	--	$0.64 /GPU/hr On-demand PCIe