GPU comparison
B300 vs L40 48GB: specs and rental cost comparison
B300 vs L40 48GB: L40 48GB is cheaper on the lowest tracked rental row at $0.20 per GPU-hour, versus $6.60 for B300. That makes B300 about 3242% more expensive per GPU-hour on the cheapest rows in the ByteCosts GPU catalog. B300 has 288 GB VRAM and L40 48GB has 48 GB VRAM. The tables compare source-backed specs and value metrics only where both GPUs have a real spec field and a tracked rental rate. Rental prices are list rates per GPU-hour, before committed-use discounts, capacity limits, or region constraints.
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B300 vs L40 48GB: rental value
Cheapest tracked on-demand rental rows and normalized value metrics.
| Metric | B300 | L40 48GB |
|---|---|---|
| Cheapest rental / GPU-hour | $6.60 | $0.20 |
| $ / GB VRAM | $0.023 | $0.004 |
B300 vs L40 48GB: specs
Hardware specs from the committed GPU spec catalog. Rows with missing source fields on either GPU are omitted.
| Spec | B300 | L40 48GB |
|---|---|---|
| Architecture | blackwell | ada |
| VRAM | 288 GB | 48 GB |
| Memory bandwidth | 8000 GB/s | 864 GB/s |
| TDP | 1400 W | 300 W |
Cheapest tracked rental rows
| GPU | Provider | Instance | Region | GPUs | Instance/hr | Per-GPU/hr |
|---|---|---|---|---|---|---|
| B300 | Massed Compute | b300-sxm6-x8 | published | 8 | $52.80 | $6.60 |
| L40 48GB | Massed Compute | l40-48gb-x4 | published | 4 | $0.79 | $0.20 |
Frequently asked questions
Is B300 or L40 48GB cheaper to rent?
L40 48GB is cheaper on the lowest tracked row at $0.20 per GPU-hour, compared with $6.60 for B300. Region, capacity, spot interruption, and discounts can change a production bill.
Which is better value, B300 or L40 48GB?
Use the value table above: $/GB-VRAM is always shown from real VRAM and rental rate, while $/TFLOP rows are shown only when both GPUs have the relevant sourced compute spec. Do not compare a missing field as zero.
Where do these GPU comparison numbers come from?
Rental rates come from the ByteCosts GPU rental catalog normalized from the SkyPilot catalog. Hardware specs come from the committed GPU spec catalog and its per-GPU source URLs.
B300 vs L40 48GB GPU comparison. ByteCosts. Updated September 4, 2026. https://bytecosts.com/gpu/compare/b300-vs-l40-48gb/