AMD's next AI accelerator carries 432 GB of memory, 50% more than its predecessor.
Memory prices are rising across the industry, and AMD is buying more of this costlier input.
The company's margin guidance suggests it expects to pass those costs through or offset them.
What happened
AMD's Instinct MI455X, the flagship of the MI400 series introduced this year, is specified at 432 GB of HBM4 memory. The prior top chip, the MI355X, carries 288 GB, making the step up exactly 50%.
Why it matters
AMD is raising its memory content by half at a time when memory prices are climbing across the chip industry. The company's data center segment produced $6.7 billion in Q2 revenue, up 107% year over year, and management guided Q3 revenue to about $13 billion, up about 41% year over year, with adjusted gross margin holding near 56%.
What to watch
The gross margin is where a memory bill would show up first. Guiding it flat while revenue ramps implies AMD expects to pass its higher input costs through or find offsetting efficiencies. The stock trades near $479 at about 31 times expected next-year earnings, with a smooth ramp already priced in.
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AMD's strategy centers on memory capacity as the key differentiator for its next AI accelerator. The company's own marketing compares the MI455X directly against Nvidia's Vera Rubin, highlighting higher capacity, bandwidth, and a 15% peak performance edge. This suggests AMD sees capacity as the primary battleground in AI hardware.
The timing of this memory increase is notable, as memory prices are rising. SK Hynix, the leading HBM maker, reported Q2 revenue up 257% year over year with a record 76% operating margin, indicating a seller's market. AMD is choosing to buy more memory at higher costs, which increases financial exposure.
However, the management's guidance for Q3 revenue of about $13 billion with adjusted gross margin near 56% implies confidence in passing through higher costs. The stock price near $479 at about 31 times expected earnings suggests investors already believe this ramp will be successful. The core test is whether the margin survives the memory price, a variable AMD can manage but not control.
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