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Instinct MI300X vs Instinct MI325X
Cloud rental price, compute per dollar and specs, side by side.
Open in the interactive comparer →
Instinct MI300X$1.71lowest on-demand per GPU·h
$1.31 per PFLOP·h · 10 providersInstinct MI325X$2.25lowest on-demand per GPU·h
$1.72 per PFLOP·h · 3 providersWhat actually differs
- The Instinct MI300X and Instinct MI325X have the same dense FP16/BF16 throughput (1.31 PF vs 1.31 PF).
- The Instinct MI325X has 1.1× more memory bandwidth than the Instinct MI300X (5,300 vs 6,000 GB/s), which usually limits LLM token generation. Memory: 192 GB vs 256 GB.
- The Instinct MI300X is 24% cheaper per hour than the Instinct MI325X at the lowest on-demand prices ($1.71 vs $2.25).
- Per unit of compute, the Instinct MI300X is the better deal: $1.31 vs $1.72 per PFLOP-hour of dense FP16/BF16.
| Spec / price | Instinct MI300X | Instinct MI325X |
|---|---|---|
| Memory | 192 GB HBM3 | 256 GB HBM3ebetter |
| Memory bandwidth | 5,300 GB/s | 6,000 GB/sbetter |
| FP16 / BF16 (dense) | 1.31 PF | 1.31 PF |
| FP8 (dense) | 2.61 PF | 2.61 PF |
| FP4 (dense) | — | — |
| INT8 (dense) | 2.61 PF | 2.61 PF |
| TF32 (dense) | 0.654 PF | 0.654 PF |
| FP32 (dense) | 0.163 PF | 0.163 PF |
| FP64 (dense) | 0.163 PF | 0.163 PF |
| Power | 750 W | 1000 W |
| Architecture | CDNA 3 (2023) | CDNA 3 (2024) |
| Lowest on-demand | $1.71better | $2.25 |
| Median on-demand | $2.99better | $3.80 |
| Lowest spot | $1.11 | — |
| FP16/BF16 $ per PFLOP·h | $1.31better | $1.72 |
| Providers | 10 | 3 |
Instinct MI300X vs Instinct MI325X: questions
Is the Instinct MI300X faster than the Instinct MI325X?
The Instinct MI300X and Instinct MI325X have the same dense FP16/BF16 compute. The Instinct MI325X has 1.1× more memory bandwidth than the Instinct MI300X. Real-world speedups depend on the workload: training and prefill scale with compute, while LLM decoding scales mostly with memory bandwidth.
Which is cheaper per FLOP, the Instinct MI300X or the Instinct MI325X?
Right now the Instinct MI300X is cheaper per unit of compute: $1.31 vs $1.72 per PFLOP-hour at the lowest on-demand prices.
How much does it cost to rent an Instinct MI300X vs an Instinct MI325X for a month?
Running one GPU around the clock at the lowest on-demand price costs about $1,248 per month for the Instinct MI300X and $1,643 for the Instinct MI325X.
Which has more memory, the Instinct MI300X or the Instinct MI325X?
The Instinct MI325X has more memory: 256 GB vs 192 GB.