B300 vs MI355X
B300 starts at $4.99/GPU-hour on-demand; MI355X has no current on-demand rate. Compare the exact variants, memory and published specifications below. Peak compute figures do not establish application speed.
B300
MI355X
Spec sheet
| B300 | MI355X | |
|---|---|---|
| Spec variant | B300 | MI355X |
| Architecture | Blackwell Ultra | CDNA 4 |
| VRAM (spec variant) | 288 GB | 288 GB |
| FP16 TFLOPS (dense) | 2250 | 2500 |
| Memory bandwidth | 8000 GB/s | 8000 GB/s |
| TDP | 1400 W | 1400 W |
| Interconnect | NVLink 1800GB/s | Infinity Fabric |
| Launched | 2025 | 2025 |
What they cost to rent (2026-10-02)
| B300 | MI355X | |
|---|---|---|
| Cheapest on-demand $/hr | $4.99 | n/a |
| Cheapest spot/community $/hr | $4.99 | $2.59 |
| Cheapest source | Prime Intellect | n/a |
| Providers offering it | 13 | 1 |
Lowest recorded on-demand rate per configuration; highlighted = cheaper. Spot/marketplace tiers shown on the individual pages.
FAQ
Which has more VRAM, B300 or MI355X?
The largest recorded B300 variant has 288 GB and the largest MI355X variant has 288 GB. Other variants may have less memory. They match on maximum VRAM.
Compare more rental options: the screener · price movers · methodology.