Scrying the AMD GFX1250 LLVM Tea Leaves
chipsandcheese.com
July 19, 2026
15 min read
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Summary
AMD will showcase the new MI400 series of Datacenter Accelerators, including the GFX1250 and GFX1251, at their Advancing AI event. LLVM has begun preliminary support for these two new accelerators.
Key Takeaways
- AMD is set to unveil the MI400 series of Datacenter Accelerators, including the GFX1250 and GFX1251, at their Advancing AI event.
- The GFX1250, designed for the machine learning market, will power the Helios rack and operates only in Wave32 mode.
- GFX1250 features a significant increase in register allocation, allowing each wave in a SIMD to address up to 1024 Vector General Purpose Registers (VGPRs).
- The GFX1250 includes WMMA support for enhanced machine learning capabilities, but lacks the dynamic VGPR allocation feature found in RDNA4.
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