COMPARE / MI300X VS MI355X
MI300X vs MI355X
Specs from the chip makers' datasheets; prices from the live Compute Cafe panel, refreshed hourly. Every rate is an on-demand published price with a source receipt.
CHEAPEST MI300X
$0.500/hr
RunPod · median $7.20 · 13 providers
CHEAPEST MI355X
$2.590/hr
Vultr · median $5.99 · 3 providers
CHEAPER RIGHT NOW
MI300X
live panel, 2026-09-27
| MI300X | MI355X | |
|---|---|---|
| MAKER | AMD | AMD |
| ARCHITECTURE | CDNA 3 | CDNA 4 |
| LAUNCHED | 2023 | 2025 |
| MEMORY | 192 GB HBM3 | 288 GB HBM3e |
| MEMORY BANDWIDTH | 5.3 TB/s | 8 TB/s |
| TENSOR COMPUTE | 1,307 TFLOPS FP16/BF16 dense (2,614 sparse); 2,614 TFLOPS FP8 dense | 2.3 PFLOPS FP16/BF16 dense; FP4 paths at 4x |
| POWER DRAW | 750 W | not published as a single figure (OAM module, platform-dependent) |
| INTERCONNECT | Infinity Fabric 896 GB/s | Infinity Fabric / UALink |
HOW TO CHOOSE
MI355X vs MI300X
The MI300X's 192 GB is already proven in clouds; the MI355X adds memory and FP4. For current large-model serving, the older part has the ecosystem track record.
Workload fit
MI300X: large-model inference, memory-bound training, cost-optimized clusters. MI355X: large-model inference, training, cuda-locked stacks.
MI300X VS MI355X - FAQ
Which is cheaper to rent, MI300X or MI355X?
By today's published on-demand rates: MI300X starts at $0.500/GPU/hr (median $7.20, 13 providers) and MI355X starts at $2.590/GPU/hr (median $5.99, 3 providers). The cheapest live listing is the MI300X at RunPod. Figures recompute from the panel on every refresh.
MI300X or MI355X - which should I rent?
MI300X: The MI300X is AMD's serious answer to Hopper: more memory (192 GB) and more bandwidth (5.3 TB/s) than any NVIDIA part before Blackwell, at panel prices that frequently undercut H100. MI355X: The MI355X is AMD's CDNA 4 flagship: 288 GB of HBM3e aimed squarely at large-model inference and training, with FP4 support matching Blackwell Ultra's pitch. The side-by-side spec table and live price rows above give the full picture.
Where can I rent MI300X and MI355X?
13 providers publish MI300X rates and 3 publish MI355X rates on Compute Cafe. Every row links to the provider's own published price - committed-use and reserved rates are excluded.
Full pricing: MI300X · MI355X · all comparisons