AMD Instinct MI355X VS AMD Instinct MI300X
Choosing between **Instinct MI355X** and **Instinct MI300X** depends on your specific AI workload requirements. The **Instinct MI355X** leads in both memory capacity and raw compute power, making it a stronger choice for high-end LLM training. Currently, you can rent these GPUs starting from **$2.29/h** and **$0.95/h** respectively across 8 providers.
Instinct MI355X
Instinct MI300X
📊 Detailed Specifications Comparison
| Specification | Instinct MI355X | Instinct MI300X | Difference |
|---|---|---|---|
| Architecture & Design | |||
| Architecture | CDNA 4 | CDNA 3 | - |
| Process Node | 3nm | 5nm + 6nm | - |
| Target Market | datacenter | datacenter | - |
| Form Factor | OAM | OAM | - |
| Memory & Bandwidth | |||
| VRAM Capacity | 288GB | 192GB | +50% |
| Memory Type | HBM3e | HBM3 | - |
| Memory Bandwidth | 8.0 TB/s | 5.3 TB/s | +51% |
| Memory Bus Width | 8192-bit | 8192-bit | - |
| Compute Infrastructure | |||
| Stream Processors | 24,576 | 19,456 | +26% |
| AI & Compute Performance (TFLOPS) | |||
| FP32 (Single Precision) | 210 TFLOPS | 163.4 TFLOPS | +29% |
| FP16 (Half Precision) | N/A | 1,307.4 TFLOPS | |
| FP64 (Double Precision) | N/A | 81.7 TFLOPS | |
| INT8 (Integer Precision) | N/A | 2,614.9 TOPS | |
| Power & Efficiency | |||
| TDP (Thermal Design Power) | 1000W | 750W | +33% |
| PCIe Interface | PCIe 5.0 x16 | PCIe 5.0 x16 | - |
🎯 Use Case Recommendations
LLM & Large Model Training
AMD Instinct MI300X
Higher VRAM capacity and memory bandwidth are critical for training large language models. The Instinct MI355X offers 288GB compared to 192GB.
AI Inference
AMD Instinct MI300X
For inference workloads, performance per watt matters most. Consider the balance between FP16/INT8 throughput and power consumption.
Budget-Conscious Choice
AMD Instinct MI300X
Based on current cloud pricing, the Instinct MI300X starts at a lower hourly rate.
Technical Deep Dive: Instinct MI355X vs Instinct MI300X
This is a generational comparison within the AMD ecosystem, pitting CDNA 4 against CDNA 3. The Instinct MI355X has a significant **96GB VRAM advantage**, which is crucial for training massive datasets or large language models. From a cost perspective, the **Instinct MI300X** is currently about **59% cheaper** per hour, offering better value for budget-conscious projects.
AMD Instinct MI355X is Best For:
- Massive LLM training
- Budget projects
AMD Instinct MI300X is Best For:
- LLM inference at scale
- Large VRAM capacity
- CUDA-only software
Frequently Asked Questions
Which GPU is better for AI training: Instinct MI355X or Instinct MI300X?
For AI training, the key factors are VRAM size, memory bandwidth, and tensor core performance. The Instinct MI355X offers 288GB of HBM3e memory with 8.0 TB/s bandwidth, while the Instinct MI300X provides 192GB of HBM3 with 5.3 TB/s bandwidth. For larger models, the Instinct MI355X's higher VRAM capacity gives it an advantage.
What is the price difference between Instinct MI355X and Instinct MI300X in the cloud?
Cloud GPU rental prices vary by provider and region. Based on our data, Instinct MI355X starts at $2.29/hour while Instinct MI300X starts at $0.95/hour. This represents a 141% price difference.
Can I use Instinct MI300X instead of Instinct MI355X for my workload?
It depends on your specific requirements. If your model fits within 192GB of VRAM and you don't need the additional throughput of the Instinct MI355X, the Instinct MI300X can be a cost-effective alternative. However, for workloads requiring maximum memory capacity or multi-GPU scaling, the Instinct MI355X's architecture may be essential.
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