Nvidia B300 vs Nvidia RTX PRO 4000 SFF

The B300 has 12x the memory and 19x the bandwidth. The RTX PRO 4000 SFF is cheaper right now.

At a glance

Memory

12x more on B300

B300: 288 GB

RTX PRO 4000 SFF: 24 GB

Memory bandwidth

19x higher on B300

B300: 8,000 GB/s

RTX PRO 4000 SFF: 432 GB/s

Cheapest on-demand

93% cheaper on RTX PRO 4000 SFF

B300: $5.58 /GPU/hr

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	B300	RTX PRO 4000 SFF
On-demand	$9.50 /GPU/hr from $5.58	-- /GPU/hr from $0.38
Reserved	$5.75 /GPU/hr from $4.32 (60 mo)	No reserved listings
Spot	$6.17 /GPU/hr from $4.08	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 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.

Price history

B300 vs RTX PRO 4000 SFF price history

Weekly median on-demand price per GPU per hour

Last 12 months

Aggregating historical prices...

Specs comparison

Spec	B300	RTX PRO 4000 SFF	Difference
Memory
Capacity	288 GB HBM3e	24 GB GDDR7	12x more on B300
Bandwidth	8,000 GB/s	432 GB/s	19x higher on B300
Bus width	8,192-bit	192-bit	43x wider on B300
Compute · dense
FP4	14,000 TFLOPS	385 TFLOPS	36x higher on B300
FP8	4,500 TFLOPS	192.5 TFLOPS	23x higher on B300
FP16 / BF16	2,250 TFLOPS	96.3 TFLOPS	23x higher on B300
INT8	153.5 TOPS	192.5 TOPS	25% higher on RTX PRO 4000 SFF
FP32	75 TFLOPS	24 TFLOPS	3.1x higher on B300
FP64	1.2 TFLOPS	Not supported	B300 only
Platform
Interconnect	NVLink 1,800 GB/s	PCIe only	NVLink on B300 only
Board power	1,100 W	70 W	16x higher on B300
Released	Q1 2025	Q3 2025
Precision
Supported formats	FP4FP6FP8FP16BF16TF32FP32FP64INT8	FP4FP8FP16BF16TF32FP32INT8

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

Source: B300 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	B300	RTX PRO 4000 SFF
Daytona USA	$7.10 /GPU/hr On-demand	--
Runpod USA	$8.99 /GPU/hr On-demand SXM	--
Lium Distributed	$11.90 /GPU/hr On-demand SXM	--
Runcrate USA	$17.02 /GPU/hr On-demand NVL	--
EmpirioLabs AI USA	$23.80 /GPU/hr On-demand	--
Spheron Singapore	$5.84 /GPU/hr Spot SXM	--
GPUaaS USA	$5.00 /GPU/hr Custom SXM	--
Impossible Cloud Germany	$4.49 /GPU/hr Reserved	--
Hetzner Germany	--	$0.38 /GPU/hr On-demand