Comparison · GPU vs GPU · read 00:32 UTCB300 vs MI355X
Specifications, today's prices from 32 providers, price per unit of memory and compute, and who rents each cheapest. Better values are highlighted; lower is better for prices.
Side by sideSpecs, prices, value
Highlighted cells are the better of the two: more memory and compute, lower prices, lower cost per unit.
| B300 | MI355X | Difference | |
|---|---|---|---|
| Memory & compute | |||
| VRAM | 270 GB | 288 GB | -6% |
| Memory bandwidth | 7.70 TB/s | 8.00 TB/s | -4% |
| FP16 tensor | 2,250 TFLOPS | 2,516.6 TFLOPS | -11% |
| FP32 | 75 TFLOPS | 157.3 TFLOPS | -52% |
| Power | 1100 W | 1400 W | -21% |
| Prices today | |||
| Cheapest on-demand | $5.57 | $2.95 | +89% |
| Median on-demand | $8.99 | $5.99 | +50% |
| Highest on-demand | $25.80 | $6.30 | +310% |
| Cheapest spot | $4.08 | $3.44 | +19% |
| Cheapest reserved | $3.49 | $6.13 | -43% |
| Current offers (n) | 49 | 3 | +1533% |
| Providers with a fresh offer | 29 | 3 | +867% |
| Value | |||
| Per GB of VRAM · hour (cheapest) | $0.021 | $0.010 | +102% |
| Per GB of VRAM · hour (median) | $0.033 | $0.021 | +60% |
| Per PFLOP FP16 · hour (median) | $3.996 | $2.380 | +68% |
| Per TB/s · hour (median) | $1.168 | $0.749 | +56% |
| Trend | |||
| 30-day median change | +5.7% | — | — |
| 90-day median change | +23.3% | — | — |
90 days · median on-demand price · rebased to 100How the two have moved
Both medians indexed to 100 ninety days ago, so the slopes compare even though the price levels differ.
Cheapest providers today · on-demand · current offersWho rents each one cheapest
- 1
SeewebTrust 691× $5.57 - 2
UpCloudTrust 751× $5.82 - 3
Deep Infra1× $5.89
- 1
TensorWaveTrust 648× $2.95 - 2
Daytona1× $5.99 - 3
OpenRelay1× $6.30
Verdict · computed from the numbers aboveChoose one, choose the other
Choose the B300 if…
- you want choice: 29 providers have a fresh offer today against 3.
Choose the MI355X if…
- your model needs more than 270 GB per GPU: 288 GB against 270 GB.
- the hourly price matters most: median $5.99 against $8.99, 33% less.
- you serve LLMs: memory bandwidth per dollar is better ($0.749 per TB/s-hour against $1.168).
Questions about B300 vs MI355X
Which is cheaper to rent, the B300 or the MI355X?
Today the cheapest current on-demand B300 is $5.57 per GPU-hour and the cheapest MI355X is $2.95; medians are $8.99 and $5.99. Cheapest excludes offers marked unavailable and counts one floor per marketplace.
How much memory do the B300 and MI355X have?
270 GB of HBM3e on the B300, 288 GB of HBM3E on the MI355X, at 7.70 and 8.00 TB/s.
Where do these numbers come from?
From 52 current offers read on the providers' own pages and APIs over the last 45 days (reference 00:32 UTC), or in our October 2026 market study for the few providers our collector does not read. Specifications come from manufacturer datasheets. Every price on the GPU pages links to its receipt and shows its read date.