Rubin vs B300
Rubin and B300 both have 288 GB per GPU; Rubin's HBM4 runs at 22 TB/s, against 8 TB/s for B300's HBM3e. B300 rents from $4.99/GPU-hour on demand (4 October 2026); no cloud we track publishes an hourly Rubin price yet.
Specifications, side by side
| Specification | Rubin | B300 |
|---|---|---|
| Exact GPU | Rubin | B300 |
| Memory per GPU | 288 GB | 288 GB |
| Memory generation | HBM4 | HBM3e |
| Memory bandwidth per GPU | 22 TB/s | 8 TB/s |
| NVLink bandwidth per GPU | 3.6 TB/s | 1.8 TB/s |
| FP16/BF16 compute per GPU, dense | 4 PFLOPS | 2.25 PFLOPS ² |
| Availability | Announced; NVIDIA says partners offer it from the second half of 2026 · No public hourly price (3 October 2026) | Rentable now: 47 offers from 17 providers (4 October 2026) |
The two GPUs have equal published memory capacity. Specifications updated 2026-10-05.
These are NVIDIA's published peak figures, not measured speed on any workload.
² Our calculation. Calculation: 36 PFLOPS sparse ÷ 2 ÷ 8 GPUs (NVIDIA HGX B200/B300 table).
Recorded on-demand rental rates
| Rate | Rubin | B300 |
|---|---|---|
| Lowest recorded on-demand | No recorded on-demand rate | $4.99/GPU-hour (recorded 4 October 2026) |
Every rate comes from our daily price collection and shows the date it was recorded.
Check Rubin cloud announcements and availability.
Current B300 rental offers
Provider, memory & availability
| GPU / provider | Billing | $/GPU-hour | GPUs / total per hour | Availability / details |
|---|---|---|---|---|
| B300Daytona288 GB VRAMB300; GPU rate only, CPU/memory/disk billed separately | spot / interruptible | $4.08per GPU-hour30-day comparison unavailable | Node minimum and total not reported | Not reportedView provider2026-10-03Details
|
| B300Impossible Cloud288 GB VRAM278-B300; 768 GPUs quoted; 8 GPUs/node; Early 2027 | reserved / committedContract duration not published; confirm quoteStarting rate; confirm terms | $4.32per GPU-hour30-day comparison unavailable | Node minimum and total not reported | Waitlist2026-10-03Details
|
| B300Impossible Cloud288 GB VRAM290-B300; 32 GPUs quoted; 8 GPUs/node; availability by request | reserved / committed60 monthsStarting rate; confirm terms | $4.32per GPU-hour30-day comparison unavailable | Node minimum and total not reported | Waitlist2026-10-03Details
|
| B300Impossible Cloud288 GB VRAM289-B300; 128 GPUs quoted; 8 GPUs/node; 2026 Dec (RFS), 8-12 weeks after MSA | reserved / committed60 monthsStarting rate; confirm terms | $4.84per GPU-hour30-day comparison unavailable | Node minimum and total not reported | Waitlist2026-10-03Details
|
| B300Impossible Cloud288 GB VRAM291-B300; 512 GPUs quoted; 8 GPUs/node; 1 Mar 2027 | reserved / committed36-60 months; confirm contractStarting rate; confirm terms | $4.95per GPU-hour30-day comparison unavailable | Node minimum and total not reported | Waitlist2026-10-03Details
|
| B300Together AI288 GB VRAM | spot / interruptible | $4.99per GPU-hour30-day comparison unavailable | Node minimum and total not reported | Not reportedView provider2026-10-04Details
|
| B300Prime Intellect288 GB VRAM | on-demand | $4.99per GPU-hour+0.0% over 30 days | Node minimum and total not reported | Not reportedView provider2026-10-04Details
|
| B300Impossible Cloud288 GB VRAM270-B300; 2000 GPUs quoted; unspecified GPUs/node; availability by request | reserved / committed60 monthsStarting rate; confirm terms | $5.16per GPU-hour30-day comparison unavailable | Node minimum and total not reported | Waitlist2026-10-03Details
|
| B300Impossible Cloud288 GB VRAM292-B300; 192 GPUs quoted; 8 GPUs/node; availability by request | reserved / committed36 monthsStarting rate; confirm terms | $5.21per GPU-hour30-day comparison unavailable | Node minimum and total not reported | Waitlist2026-10-03Details
|
| B300Impossible Cloud288 GB VRAM271-B300; 72 GPUs quoted; 8 GPUs/node; 1 Dec 2026 | reserved / committed60 monthsStarting rate; confirm terms | $5.36per GPU-hour30-day comparison unavailable | Node minimum and total not reported | Waitlist2026-10-03Details
|
| B300Impossible Cloud288 GB VRAM290-B300; 32 GPUs quoted; 8 GPUs/node; availability by request | reserved / committed36 monthsStarting rate; confirm terms | $5.37per GPU-hour30-day comparison unavailable | Node minimum and total not reported | Waitlist2026-10-03Details
|
| B300Impossible Cloud288 GB VRAM289-B300; 128 GPUs quoted; 8 GPUs/node; 2026 Dec (RFS), 8-12 weeks after MSA | reserved / committed36 monthsStarting rate; confirm terms | $5.47per GPU-hour30-day comparison unavailable | Node minimum and total not reported | Waitlist2026-10-03Details
|
| B300Spheron288 GB VRAM | spot / interruptible | $5.56per GPU-hour30-day comparison unavailable | Node minimum and total not reported | Not reportedView provider2026-10-04Details
|
| B300Latitude.sh288 GB VRAMg4-b300-large | reserved / committed12 months, annual plan; normalized over 8760 hours | $5.60per GPU-hour30-day comparison unavailable | 8× $44.80per node-hour | Out of stock2026-10-04Details
|
| B300Impossible Cloud288 GB VRAM279-B300; unspecified GPUs quoted; 8 GPUs/node; availability by request | reserved / committed36 monthsStarting rate; confirm terms | $5.89per GPU-hour30-day comparison unavailable | Node minimum and total not reported | Waitlist2026-10-03Details
|
| B300Impossible Cloud288 GB VRAM271-B300; 72 GPUs quoted; 8 GPUs/node; 1 Dec 2026 | reserved / committed48 monthsStarting rate; confirm terms | $6.00per GPU-hour30-day comparison unavailable | Node minimum and total not reported | Waitlist2026-10-03Details
|
| B300Synteq288 GB VRAMnvidia-b300; full passthrough GPU; setup fee not reported | reserved / committed1 month, $4555/month ÷ 730 hours; monthly billing | $6.24per GPU-hour30-day comparison unavailable | 1× $6.24per node-hour | Out of stock2026-10-03Details
|
| B300Daytona288 GB VRAMB300; GPU rate only, CPU/memory/disk billed separately | on-demand | $6.25per GPU-hour30-day comparison unavailable | Node minimum and total not reported | Not reportedView provider2026-10-03Details
|
| B300Impossible Cloud288 GB VRAM271-B300; 72 GPUs quoted; 8 GPUs/node; 1 Dec 2026 | reserved / committed36 monthsStarting rate; confirm terms | $6.38per GPU-hour30-day comparison unavailable | Node minimum and total not reported | Waitlist2026-10-03Details
|
| B300Impossible Cloud288 GB VRAM280-B300; unspecified GPUs quoted; unspecified GPUs/node; availability by request | reserved / committed36 monthsStarting rate; confirm terms | $6.68per GPU-hour30-day comparison unavailable | Node minimum and total not reported | Waitlist2026-10-03Details
|
| B300Impossible Cloud288 GB VRAM272-B300; 64 GPUs quoted; 8 GPUs/node; availability by request | reserved / committed24+ months; confirm contractStarting rate; confirm terms | $6.84per GPU-hour30-day comparison unavailable | Node minimum and total not reported | Waitlist2026-10-03Details
|
| B300RunPod288 GB VRAM | community cloud | $6.94per GPU-hour+0.0% over 30 days | Node minimum and total not reported | Not reportedView provider2026-10-04Details
|
| B300Modal288 GB VRAM | serverless | $7.10per GPU-hour$0.001972/sec+0.0% over 30 days | Node minimum and total not reported | Not reportedView provider2026-10-04Details
|
| B300Impossible Cloud288 GB VRAM276-B300; unspecified GPUs quoted; 8 GPUs/node; availability by request | reserved / committed12 monthsStarting rate; confirm terms | $7.26per GPU-hour30-day comparison unavailable | Node minimum and total not reported | Waitlist2026-10-03Details
|
| B300Hyperstack288 GB VRAM | on-demand | $7.40per GPU-hour+0.0% over 30 days | Node minimum and total not reported | Not reportedView provider2026-10-04Details
|
| B300Impossible Cloud288 GB VRAM276-B300; unspecified GPUs quoted; 8 GPUs/node; availability by request | reserved / committed6 monthsStarting rate; confirm terms | $7.79per GPU-hour30-day comparison unavailable | Node minimum and total not reported | Waitlist2026-10-03Details
|
| B300RunPod288 GB VRAM | secure cloud | $7.89per GPU-hour+0.0% over 30 days | Node minimum and total not reported | Not reportedView provider2026-10-04Details
|
| B300Impossible Cloud288 GB VRAM288-B300; 480 GPUs quoted; 8 GPUs/node; availability by request | reserved / committed12 monthsStarting rate; confirm terms | $7.89per GPU-hour30-day comparison unavailable | Node minimum and total not reported | Waitlist2026-10-03Details
|
| B300Impossible Cloud288 GB VRAM276-B300; unspecified GPUs quoted; 8 GPUs/node; availability by request | reserved / committed3 monthsStarting rate; confirm terms | $8.00per GPU-hour30-day comparison unavailable | Node minimum and total not reported | Waitlist2026-10-03Details
|
| B300Lium269 GB VRAMMarketplace node b164160d-6db7-4288-b7ef-e05ac62579aa; 8 GPUs on host | secure cloud | $8.00per GPU-hour30-day comparison unavailable | 1× $8.00per node-hour | In stockView provider2026-10-04Details
|
| B300Latitude.sh288 GB VRAMg4-b300-large | reserved / committed1 month, monthly plan; normalized over 720 hours | $8.11per GPU-hour30-day comparison unavailable | 8× $64.89per node-hour | Out of stock2026-10-04Details
|
| B300Scaleway288 GB VRAM | on-demand | $8.42per GPU-hour-3.4% over 30 days | 8× $67.35per node-hour | Not reportedView provider2026-10-04Details
|
| B300DataCrunch268 GB VRAM | on-demand | $8.88per GPU-hour+18.4% over 30 days | 1× $8.88per node-hour | Not reportedView provider2026-10-04Details
|
| B300Impossible Cloud288 GB VRAM274-B300; 56 GPUs quoted; 8 GPUs/node; December | reserved / committed7.5-12 months; confirm contractStarting rate; confirm terms | $9.37per GPU-hour30-day comparison unavailable | Node minimum and total not reported | Waitlist2026-10-03Details
|
| B300Nebius288 GB VRAM | on-demand | $9.50per GPU-hour+21.0% over 30 days | Node minimum and total not reported | Not reportedView provider2026-10-04Details
|
| B300Together AI288 GB VRAM | on-demand | $9.99per GPU-hour30-day comparison unavailable | Node minimum and total not reported | Not reportedView provider2026-10-04Details
|
| B300DigitalOcean288 GB VRAMgpu-b300x1-288gb | on-demand | $11.19per GPU-hour30-day comparison unavailable | 1× $11.19per node-hour | Not reportedView provider2026-10-04Details
|
| B300DigitalOcean288 GB VRAMgpu-b300x8-2304gb | on-demand | $11.19per GPU-hour30-day comparison unavailable | 8× $89.52per node-hour | Not reportedView provider2026-10-04Details
|
| B300Spheron288 GB VRAM | on-demand | $12.42per GPU-hour+20.9% over 30 days | Node minimum and total not reported | Not reportedView provider2026-10-04Details
|
| B300Lium269 GB VRAMMarketplace node bbd49d54-aac5-4e12-85ce-60024505d349; 8 GPUs on host | secure cloud | $12.90per GPU-hour30-day comparison unavailable | 8× $103.20per node-hour | In stockView provider2026-10-04Details
|
| B300Lium269 GB VRAMMarketplace node 21457db5-9464-4330-bedb-0b7623be88fc; 8 GPUs on host | secure cloud | $12.90per GPU-hour30-day comparison unavailable | 8× $103.20per node-hour | In stockView provider2026-10-04Details
|
| B300Lium269 GB VRAMMarketplace node c2b8570c-fbfc-4138-ade5-aa0cf2b1d1b2; 8 GPUs on host | secure cloud | $12.95per GPU-hour30-day comparison unavailable | 8× $103.60per node-hour | In stockView provider2026-10-04Details
|
| B300Lium269 GB VRAMMarketplace node d23c72ae-3ac3-4f87-b39b-41c5a131cce6; 8 GPUs on host | secure cloud | $12.95per GPU-hour30-day comparison unavailable | 8× $103.60per node-hour | In stockView provider2026-10-04Details
|
| B300Lium269 GB VRAMMarketplace node a40843e9-0f30-457f-8976-f1b745c21ed2; 8 GPUs on host | secure cloud | $12.95per GPU-hour30-day comparison unavailable | 8× $103.60per node-hour | In stockView provider2026-10-04Details
|
| B300fal288 GB VRAM | serverless | $12.99per GPU-hour$0.003608/sec+52.8% over 30 days | Node minimum and total not reported | Not reportedView provider2026-10-04Details
|
| B300Fireworks AI288 GB VRAM | serverless | $15.00per GPU-hour$0.004167/sec+0.0% over 30 days | Node minimum and total not reported | Not reportedView provider2026-10-04Details
|
| B300Latitude.sh288 GB VRAMg4-b300-large | on-demand | $16.00per GPU-hour30-day comparison unavailable | 8× $128.00per node-hour | Out of stock2026-10-04Details
|
No offers match these filters.
Try another provider or reduce the minimum memory.
Tables rank by price, lowest first. Commercial relationships never affect ordering. How we collect and rank prices.
Monthly view assumes 730 hours of continuous use. Daily view assumes 24 hours.
Specifications and sources
Rubin values come from NVIDIA's individual GPU specification table. B300 capacity comes from its NVIDIA specification. Updated 2026-10-05. Quoted evidence is listed under Sources in the footer.
B300 memory type · NVIDIA DGX B200 · NVIDIA HGX B200/B300 · Blackwell Ultra specifications · NVIDIA H200
NVIDIA publishes two sets of per-GPU Rubin figures. Its HGX table lists 22 TB/s of memory bandwidth and 3.6 TB/s of NVLink bandwidth; its Vera Rubin NVL72 table lists 19.2 TB/s and 3 TB/s, for an at-scale AI factory. Ask the provider which system it rents before comparing performance.
B300 rental prices and history · Rubin specifications and cloud availability · All GPU comparisons