RentServers.comBy the RentServers.com team · Updated
B300 specifications
| Architecture | Blackwell Ultra |
|---|---|
| Memory | Up to 288 GB HBM3e |
| Memory bandwidth | Up to ~8 TB/s |
| FP4 Tensor | About 1.5x B200 (NVIDIA) |
| NVLink | 1.8 TB/s (5th gen) |
| System power | ~14 kW per 8-GPU DGX B300 |
Figures for the SXM/HGX version unless noted, from NVIDIA. Dense throughput; vendors' headline numbers with sparsity are double.
Who the B300 is for
Teams serving or training very large models where memory per GPU decides how many GPUs a model needs. With 288 GB per GPU, an 8-GPU node holds about 2.3 TB of HBM, enough for large mixture-of-experts models and long-context inference on one node.
Software support follows the B200: confirm your CUDA, driver and framework versions support Blackwell Ultra before a long reservation.
Pricing and supply
GetDeploying shows a reserved median of $6.49 and an on-demand median of $8.99 per GPU-hour (October 28, 2026), with only 15 providers listing it. With so few listings, single-provider changes move the median, so read week-to-week moves with care.
Longer terms price well below on demand. Ask every bidder for 12, 24 and 36 month rates and the delivery date in writing.
What to check in a B300 quote
- Liquid or air cooling, and the rack density the facility will commit to.
- Fabric: InfiniBand or Ethernet bandwidth per GPU for multi-node jobs.
- Delivery and acceptance-test dates, and credits if they slip.
- Whether the price holds for the full term or is index-linked.
Rent or buy an B300?
Buying one runs about $400,000 to $520,000 (new, estimate, October 25, 2026), or about $16,278 a month over 36 months including hosting. Renting the same 8 GPUs costs about $37,902 a month reserved or $52,502 on demand around the clock, so owning beats on-demand rental above roughly 31% utilization.
New 8-GPU system without cluster fabric, public reseller price lists, October 17 to 25, 2026 (volume to single unit). No used trades reported. The full comparison, including what owning really costs, is in rent vs buy GPUs; to buy outright, use our wholesale desk.
Bare metal or cloud for B300
B300 is mostly sold as reserved bare metal, with multi-year contract listings well below on-demand rates. On-demand supply is thin, so on-demand medians move sharply week to week.
| System | Purchase price | Owned, per month | Rent reserved, per month | Rent on demand 24/7, per month | Breakeven use vs on demand | Payback vs on demand |
|---|---|---|---|---|---|---|
| 8x B300 (HGX) | $400,000 to $520,000 (new, estimate, October 25, 2026) | $16,278 | $37,902 | $52,502 | 31% | 9 months |
Rental: provider medians for 8 GPUs x 730 hours, week of October 19, 2026, GetDeploying, GPU rental price history, CC BY 4.0. Purchase: estimates from public reseller price lists and market reports, dated per row; no dealer quote. Owned per month: purchase price over 36 months plus hosting at about $250 per kW per month all-in (published 2026 retail colocation pricing, an estimate) at the system's maximum power. Excludes network, spares, staff, financing and resale value.
Typical B300 server specifications
| Typical system | 8x B300 (HGX) |
|---|---|
| Memory per GPU | 288 GB HBM3e |
| System GPU memory | 2,304 GB |
| Memory bandwidth per GPU | 8 TB/s |
| GPU interconnect | NVLink 5, 1.8 TB/s per GPU |
| GPU power | up to 1,100 W |
| System power | about 14 kW (NVIDIA DGX B300 published system power, about 14 kW) |
From NVIDIA. Model names are trademarks of their owners.
B300 price by term
| Term | Provider median, $/GPU-hr |
|---|---|
| On demand | $8.99 |
| 12 months | $6.49 |
| 24 months | $5.99 |
| 36 months | $5.00 |
Week of October 19, 2026, 15 providers on demand. Source: GetDeploying, GPU rental price history, CC BY 4.0.
Where to run it
Power and cooling decide where an B300 cluster can live. Local power, density and quotes for 25 markets:
All 25 cities · Weekly GPU price tracker
B300 questions
How much does it cost to rent a B300?
On GetDeploying's tracker (October 28, 2026): median $6.49 per GPU-hour reserved and $8.99 on demand. An 8-GPU node at the reserved median is about $37,900 a month.
B300 or B200?
Pick the B300 when memory per GPU is the limit, for example very large models or long context. If your model fits comfortably in 180 GB per GPU, B200 capacity is easier to find and usually cheaper.