HBM4 Prices Could Double by 2027 as AI Demand Locks Up Half of DRAM Capacity
N.R. Finch
Industry sources say HBM4 pricing could reach $4–5 per gigabit by 2027 — more than double today's level — driven by Nvidia's Rubin ramp, soaring manufacturing costs, and multi-year supply deals that together may lock up roughly half of all DRAM capacity.
Where do the price numbers come from?
HBM3E currently trades at roughly $1.5–1.6 per gigabit. HBM4 sits at about $2 today; industry estimates put 2027 pricing at $4–5 or higher.
This means → the cost of the same amount of high-bandwidth memory could double or triple within two years, far outpacing any historical DRAM price cycle.
Samsung, SK hynix, and Micron are expected to finalize 2027 HBM pricing as early as Q4 2026.
Why is HBM4 so expensive to make?
HBM4 — the fourth generation of high-bandwidth memory, ultra-fast DRAM designed for AI chips — uses a logic-process base die, stacks more layers, and yields below HBM3E in early production. In plain terms = more steps, more waste, higher cost.
Producing one HBM unit consumes roughly three times the wafer capacity of DDR5, and the cycle runs four to six months versus just over three for DDR5.
HBM iterates roughly every two years — nearly three times the pace of historical DDR generations. This means → manufacturers must invest in the next node before recouping the last one.
Half of DRAM capacity locked up — by whom?
Memory makers are signing three-to-five-year long-term agreements (LTAs) with major customers, locking in an estimated 20%–30% of commodity DRAM output.
HBM itself may consume about 30% of total DRAM capacity. Combined, roughly half of industry capacity could be constrained from 2027 onward.
This means → buyers without long-term contracts — consumer-electronics firms, smaller customers — face the greatest supply risk when capacity tightens.
DDR5 margins are higher — so why keep making HBM?
DDR5 operating margins already exceed 80% and are rising quarter over quarter; in some scenarios they surpass HBM margins.
Samsung and SK hynix have begun shifting some capacity back to DDR5 — returns are higher, cycles shorter, process switching easier.
This reflects a core tension: the more profitable DDR5 becomes, the less incentive suppliers have to expand HBM. In plain terms = DDR5's high margins become an accelerator for HBM price hikes — suppliers must push HBM pricing up to justify the expansion.
What does this mean for downstream buyers?
Cloud providers may adjust near-term purchasing rhythms, but long-term demand for HBM and server memory is still expected to keep expanding.
LTAs include fixed-price clauses, yet suppliers retain repricing provisions and can flexibly reallocate capacity between DDR5 and HBM.
This means → suppliers will hold pricing power through the 2027 negotiations, and buyer leverage is narrowing.
Content is for reference only, not financial advice.