AMD Instinct MI250 128GB vs AMD MI250X 128GB
The MI250X delivers 6% more FP16 throughput than the Instinct MI250 (383 vs 362 TFLOPS dense).
AMD Instinct MI250 128GB
Full specs →AMD MI250X 128GB
Full specs →Specifications
Performance (TFLOPS)
FLOPS by Precision
What actually differs
Both GPUs launched in 2021: the Instinct MI250 on CDNA 2 and the MI250X on CDNA 2.
Dense throughput for the Instinct MI250 against the MI250X: FP64 45 vs 48 TFLOPS, FP32 45 vs 48 TFLOPS, FP16 362 vs 383 TFLOPS. Sparse figures, where the vendor publishes them, appear under each dense number in the performance table.
Memory is 128 GB against 128 GB, fed at 3.3 TB/s versus 3.3 TB/s. More memory per GPU means larger models fit before you have to shard across cards, which often matters more than raw TFLOPS for inference.
Power budgets are 500 W for the Instinct MI250 and 560 W for the MI250X. At FP32 that works out to 0.09 against 0.09 TFLOPS per watt.
For LLM training and inference, weight the FP8 and FP16 rows and memory capacity most heavily. For scientific and HPC workloads, the FP64 row is the one to read.
Frequently asked questions
Is the Instinct MI250 faster than the MI250X?
At FP16 precision the MI250X reaches 383 TFLOPS dense against 362 TFLOPS for the Instinct MI250. The performance table on this page lists every published precision for both GPUs.
Which has more memory, the Instinct MI250 or the MI250X?
Both GPUs carry 128 GB of memory. Memory bandwidth is 3.3 TB/s for the Instinct MI250 and 3.3 TB/s for the MI250X.
How much power do the Instinct MI250 and the MI250X draw?
The Instinct MI250 is rated at 500 W TDP and the MI250X at 560 W. On FP32 throughput per watt, the Instinct MI250 is the more efficient part.
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