The GB300 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 GB300
- GB300
- 288 GB
- RTX 4090
- 24 GB
Memory bandwidth
7.9x higher on GB300
- GB300
- 8.00 TB/s
- RTX 4090
- 1.01 TB/s
Cheapest on-demand
98% cheaper on RTX 4090
- GB300
- $18.00 /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 | GB300 | RTX 4090 | Difference |
|---|---|---|---|
| On-demand | -- /GPU/hr from $18.00 | $0.44 /GPU/hr from $0.33 | |
| Reserved | On request | $0.52 /GPU/hr from $0.40 (1 mo) | |
| Spot | Sold out | $0.40 /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 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
GB300 vs RTX 4090 price history
Weekly median on-demand price per GPU per hour
Specs comparison
| Spec | GB300 | RTX 4090 | Difference |
|---|---|---|---|
| Memory | |||
| Capacity | 288 GB HBM3e | 24 GB GDDR6X | 12x more on GB300 |
| Bandwidth | 8,000 GB/s | 1,010 GB/s | 7.9x higher on GB300 |
| Bus width | 8,192-bit | 384-bit | 21x wider on GB300 |
| Compute · dense | |||
| FP4 | 15,000 TFLOPS | Not supported | GB300 only |
| FP8 | 5,000 TFLOPS | 330.3 TFLOPS | 15x higher on GB300 |
| FP16 / BF16 | 2,500 TFLOPS | 165.2 TFLOPS | 15x higher on GB300 |
| INT8 | 165 TOPS | 660.6 TOPS | 4x higher on RTX 4090 |
| FP32 | 80 TFLOPS | 82.6 TFLOPS | Within 5% |
| FP64 | 1.3 TFLOPS | Not supported | GB300 only |
| Platform | |||
| Interconnect | NVLink 1,800 GB/s | PCIe only | NVLink on GB300 only |
| Board power | 1,400 W | 450 W | 3.1x higher on GB300 |
| Released | Q1 2025 | Q4 2022 | 2 years newer on GB300 |
| Precision | |||
| Supported formats | FP4FP6FP8FP16BF16TF32FP32FP64INT8 | FP8FP16BF16TF32FP32INT4INT8 | |
Compute: Vendor peak figures, dense and per GPU. Not measured throughput.
Source: GB300 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 | GB300 | RTX 4090 |
|---|---|---|
Oracle Cloud
USA
|
$18.00 /GPU/hr On-demand NVL | -- |
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
|
$9.06 /GPU/hr On-demand SXM | -- |
Salad
Distributed
|
-- | $0.33 /GPU/hr On-demand |
Lium
Distributed
|
-- | $0.35 /GPU/hr On-demand |
Packet·ai
USA
|
-- | $0.39 /GPU/hr On-demand |
Vast.ai
USA
|
-- | $0.39 /GPU/hr On-demand |
GPU.ai
UAE
|
-- | $0.40 /GPU/hr On-demand |
GPUhub
Singapore
|
-- | $0.44 /GPU/hr On-demand |
Runcrate
USA
|
-- | $0.44 /GPU/hr On-demand PCIe |
Sesterce
France
|
-- | $0.44 /GPU/hr On-demand |
7 providers list the GB300 and 19 the RTX 4090. Every listing is on the GB300 page and the RTX 4090 page.
Similar GPUs
Other comparisons in the same class.
-
Nvidia B300
288 GB HBM3e · released Q1 2025
From $6.50 /GPU/hr Compare -
Nvidia B200
180 GB HBM3e · released Q1 2024
From $3.75 /GPU/hr Compare
-
Nvidia GB200
186 GB HBM3e · released Q1 2024
From $10.50 /GPU/hr Compare
-
Nvidia RTX 5090
32 GB GDDR7 · 77% more bandwidth than the RTX 4090
From $0.35 /GPU/hr Compare
-
Nvidia L40S
48 GB GDDR6 · 14% less bandwidth than the RTX 4090
From $0.74 /GPU/hr Compare
Our data for Nvidia GB300 was last updated on Sept. 14, 2026, and for Nvidia RTX 4090 on Sept. 14, 2026.