AMD MI300X vs B200: Specs, VRAM & Price
Short answer: choose the AMD MI300X when 192 GB of VRAM is the gating requirement. Choose the B200 when 180 GB is enough for the workload and availability points that way.
The AMD MI300X has 192 GB of VRAM; the B200 has 180 GB.
You can rent both by the hour, no purchase required. AMD MI300X from $2.63/GPU/hr; B200 from $8.79/GPU/hr. The AMD MI300X is 70% cheaper at the entry rate.
AMD MI300X
Good for training and serving frontier-scale LLMs
B200
Good for training and serving frontier-scale LLMs
Last updated: 2026-10-10 18:44:35 UTCRefreshes hourly
Specs side by side
| Spec | AMD MI300X | B200 |
|---|---|---|
| VRAM | 192 GB | 180 GB |
| Memory bandwidth | 5.3 TB/s | 8 TB/s |
| Architecture | CDNA3 | Blackwell |
| Compute capability | n/a | 10.0 |
| Precisions in hardware | FP32, FP16, BF16, FP8, INT4 | FP32, FP16, BF16, FP8, INT4 |
| Peak FP16/BF16 tensor TFLOPS | 1,307.4 TFLOPS | 2,250 TFLOPS |
| Peak FP8 tensor TFLOPS | 2,614.9 TFLOPS | 4,500 TFLOPS |
| NVLink / multi-GPU interconnect | Infinity Fabric | NVLink 5, 1.8 TB/s per GPU |
| Max board power (TDP) | 750W | Up to 1,000W |
| Form factor | – | SXM |
| Regions | 2 | 3 |
On-demand price
| Rate | AMD MI300X | B200 |
|---|---|---|
| Lowest per GPU/hr | $2.63/GPU/hr | $8.79/GPU/hr |
Which is better for AI: AMD MI300X or B200?
Choose the AMD MI300X when 192 GB of VRAM is the gating requirement. Choose the B200 when 180 GB is enough for the workload and availability points that way.
AMD MI300X vs B200: common questions
Is the AMD MI300X or the B200 better for AI?
Short answer: choose the AMD MI300X when 192 GB of VRAM is the gating requirement. Choose the B200 when 180 GB is enough for the workload and availability points that way.
Is the AMD MI300X or the B200 cheaper to rent?
On Aquanode's live marketplace the AMD MI300X starts at $2.63/GPU/hr (median $2.63/GPU/hr) and the B200 starts at $8.79/GPU/hr (median $8.79/GPU/hr). The AMD MI300X is the cheaper of the two at the entry rate, by 70%.
What is the difference between the AMD MI300X and the B200?
The AMD MI300X has 192 GB of VRAM against the B200's 180 GB; the AMD MI300X is a CDNA3 part and the B200 is Blackwell; both run BF16, FP8, INT4 workloads in hardware. On price, the AMD MI300X lists from $2.63/GPU/hr and the B200 from $8.79/GPU/hr.
How widely available are the AMD MI300X and the B200?
The AMD MI300X is listed in 2 regions and the B200 in 3 regions right now.
How much does 1,000 GPU-hours cost on the AMD MI300X vs the B200?
At the lowest rates listed today, 1,000 GPU-hours costs $2,629 on the AMD MI300X and $8,789 on the B200, a difference of $6,160 for the same runtime. Rates are per GPU per hour and update hourly.
How much VRAM does the AMD MI300X have compared to the B200?
The AMD MI300X has 192 GB of VRAM; the B200 has 180 GB.
Does the AMD MI300X or the B200 support NVLink?
Yes, both support a multi-GPU interconnect: the AMD MI300X has Infinity Fabric and the B200 has NVLink 5, 1.8 TB/s per GPU.
How this comparison is calculated
Every price is normalized to a per-GPU hourly rate using the same pipeline as every other pricing surface on Aquanode, and only the cheapest qualifying offer per provider is shown. A dash means that provider does not currently list that GPU.
Architecture, compute capability and supported precisions come from each vendor's published datasheet for that generation, not from the marketplace feed. This page regenerates at most once per hour.
Memory bandwidth, tensor TFLOPS, NVLink/interconnect and max board power are the same verified-from-datasheet figures shown on each model's own AMD MI300X page and B200 page, which link the primary vendor source for that model. A dash here means Aquanode hasn't verified that figure from a primary source yet, never a guess.
Go further
Check what fits in each card's memory with the AMD MI300X VRAM calculator and the B200 VRAM calculator, see vendor-published throughput in the GPU benchmarks and specs table, or browse every model by generation in the GPU index.
More AMD MI300X comparisons
More B200 comparisons
Related reading: AMD MI300X pricing and specs, ROCm vs CUDA, AMD vs NVIDIA GPUs for AI, AMD MI355X guide, and The best GPUs for AI, ranked.
