AI server buyers pull NAND from PC SSDs, Silicon Motion says

Silicon Motion Vice President Nelson Duann told Tom's Hardware at Computex 2026 that retail customers cut SSD purchases in the first half of 2026 after vendors raised prices from late 2025 into 2026. Memory makers steered NAND shipments toward AI data center drives, and PC makers lacked enough direct flash allocation for their notebook and desktop lines.

Duann said Acer, Asus, Dell, and HP have turned to SSD module makers for completed drives. Module makers install Silicon Motion controllers in those SSDs, then ship the drives into PC OEM systems while retailers receive fewer units.

Duann described a channel change that began in late 2025. Module vendors spent years courting retail buyers with M.2 drives, heat spreaders, RGB branding, and gaming SKUs. During the first half of 2026, PC makers absorbed capacity from module vendors' aftermarket programs.

NAND vendors made the trigger plain: They cut client allocation and sent more flash to data center products. AI server builders buy high-capacity enterprise SSDs in volume, and they give memory makers larger orders than retail SSD brands can match.

Silicon Motion sits in the controller slot, so the company feels the shift before consumers see it on shelves. SSD makers need a controller, NAND packages, firmware, power management, and qualification before they can ship a drive. NAND allocation limits the rest of the bill of materials because the controller cannot create bits that memory vendors do not ship.

On its Edge SSD Controllers page, Silicon Motion lists the SM2508 as a PCIe Gen5 x4 NVMe 2.0 controller for high-end client systems. The company builds SM2508 on TSMC's 6nm process and gives drive makers eight NAND channels at up to 3,600 MT/s, plus a quad-core Arm Cortex-R8 CPU.

Silicon Motion rates SM2508 for up to 14.5 GB/s sequential reads, 13.6 GB/s sequential writes, and 2.5 million random read and write IOPS. Drive makers can use that class of controller for premium notebooks, creator systems, and gaming desktops that need PCIe 5.0 throughput without enterprise power budgets.

The company claims about 30% lower active power use than prior Gen5 controllers and a PS4 low-power state below 2 mW. Those figures matter to PC OEMs because a thin notebook gives an SSD less room for heat than a desktop add-in card.

Silicon Motion sells SM2504XT for mainstream DRAM-less PCIe 5.0 designs. The company lists a TSMC 6nm process, four NAND channels up to 3,600 MT/s, up to 11.5 GB/s reads, 11.0 GB/s writes, and 2.0 million random IOPS. Module makers can use that part as a cheaper route for OEM systems that need Gen5 branding and sound battery behavior.

Silicon Motion uses NANDXtend ECC, LDPC engines, end-to-end data path protection, and RAID support to address a 3D NAND problem: flash cells carry less margin as vendors push density higher with TLC and QLC. Controller firmware must correct errors, spread wear, and keep latency predictable while drive makers mix NAND from several fabs or product bins.

NAND allocation now controls client SSD availability more than PCIe interface speed. Memory makers choose between client PC shipments and AI data center shipments when they assign wafer output, packaging capacity, and finished NAND packages. AI server customers demand dense enterprise SSDs for model training, inference caches, and data pipelines. They buy in larger blocks than retail SSD shoppers, and that volume gives NAND vendors a clear reason to favor the data center.

If Samsung, Kioxia, Micron, SK hynix, Western Digital, or YMTC limit client allocations, a PC maker can qualify a module vendor's drive and keep factories fed. PC makers push qualification and forecast risk onto module vendors. Module makers accept that burden because OEM orders give them volume after retail buyers pull back.

Retailers face the other side. Gamers and PC builders see higher shelf prices, fewer promotion cycles, and less choice among capacity points. A 2TB or 4TB PCIe 5.0 drive may stay on the shelf longer when the buyer can delay an upgrade, reuse a PCIe 4.0 drive, or buy a lower-capacity model.

Silicon Motion and Phison can keep selling client controllers even if Newegg and Amazon move fewer retail SSDs, because module makers route those controllers into Acer, Asus, Dell, and HP systems. Controller vendors can protect unit shipments through OEM demand while retail brand demand weakens.

Module makers gain leverage with PC OEMs. They can negotiate around capacity, firmware support, thermal designs, and qualification schedules. They face tighter execution demands: PC makers expect stable firmware, low return rates, and component traceability across long product cycles.

Consumers should watch 1TB, 2TB, and 4TB client SSD pricing along with controller launches. A fast 6nm PCIe 5.0 controller such as SM2508 supports 14.5 GB/s reads. Retail buyers need memory makers to allocate more NAND to client drives before stores can offer broader choice at lower prices.

Duann gave PC buyers a blunt read: AI infrastructure buyers have pulled NAND toward data center SSDs, PC OEMs have moved upstream into module makers' order books, and retailers have lost priority in NAND allocation.