DDR4 vs DDR5 in the 2026 Memory Shortage: Stay or Move?

If you were hoping to ride out the memory shortage on DDR4, the numbers have moved against you. DDR4 chips now cost more than DDR5 chips of the same density, because the big three memory makers have been leaving DDR4 behind, and the shortage itself is not forecast to ease before 2028. The workable strategy is simpler: keep the DDR4 servers you already run, put new purchases on DDR5 platforms, and buy less memory by sizing it properly. This guide explains each step, and where refurbished memory does and does not make sense.

When will the memory shortage end?

Not soon. In its fiscal Q4 2026 results on September 30, Micron said it expects memory and storage supply-demand conditions to be much tighter in calendar 2027 and 2028 than in 2026, and that it does not have line of sight to when supply and demand will return to balance (Micron prepared remarks). Samsung expects HBM to take nearly 30% of industry DRAM wafer capacity in 2027, up from about 20% now (TrendForce). New capacity is slow to arrive: Micron expects wafer output from its first new Idaho fab and meaningful shipments from its Tongluo facility in Taiwan from mid-2027, with its second Idaho fab and Japan expansion following in late 2028 (same Micron prepared remarks). Since the major makers are exiting DDR4, do not count on new fabs to improve DDR4 supply. Plan on tight supply through at least 2027. Our guide on when server RAM prices will drop covers the forecasts in detail.

Is DDR4 cheaper than DDR5 now?

At chip level, no. TrendForce's spot prices on October 2, 2026 put a DDR4 16Gb 3200 chip at an average of $83.59 and a DDR5 16Gb 4800/5600 chip at $58.00, with an 8Gb DDR4 chip at $46.32 (TrendForce). That inversion comes from supply. TrendForce reported that Samsung set last DDR4 orders for June 2025, Micron told customers DDR4 was entering end of life with final shipments in Q1 2026, and SK hynix set final shipments for April 2026 (TrendForce). As DDR4 prices climbed, Samsung and SK hynix were reported to be pushing those phase-outs into 2026 (DIGITIMES), but that only slows the decline of supply. DDR4 prices jumped by up to 50% in Q1 2026 alone, according to reports cited by TrendForce (TrendForce).

Finished server modules do not track chip prices exactly, and a DDR4 RDIMM can still quote below a DDR5 RDIMM of the same capacity. But the direction is clear: DDR4 is a shrinking product with rising unit cost, not a discount alternative.

Should you keep running your existing DDR4 servers?

Yes, where they are still supported and still do the job. Extending the life of installed hardware is one of the cheapest responses to the shortage. Counterpoint Research suggests stretching back-office PC lifecycles from three to five years and optimizing existing memory before buying more (CIO), and the same logic applies to servers. A few practical steps:

• Harvest DIMMs from servers you are retiring and use them to top up systems that stay in service, matching part numbers and ranks.
• Buy DDR4 upgrades now if you know you will need them, because supply is shrinking rather than recovering.
• Check the manufacturer's end-of-support date for each platform before you invest more memory in it.

Should you buy new DDR4 servers to avoid DDR5 prices?

Generally not. Counterpoint Research specifically advises against buying legacy DDR4 systems to save upfront cost (CIO). DDR4 server platforms are previous-generation designs with less manufacturer support runway left, older PCIe generations and lower memory bandwidth, and the memory you would need to expand them later is getting harder to find. A new DDR5 server costs more today but has years of upgrade path ahead. Our guides to new vs refurbished servers and refurbished servers during the memory shortage cover the lifecycle question.

How do you right-size memory capacity during the shortage?

Buying less memory is the most reliable saving. Server makers are already doing it: Micron noted a modestly lower rate of memory content growth per server than expected because supply is tight (Micron prepared remarks). For your own fleet:

• Measure peak and sustained memory use per host over a full business cycle, not a quiet week.
• Right-size virtual machines and reclaim memory reserved but never used, as Counterpoint recommends.
• Populate every memory channel once before adding a second DIMM per channel; bandwidth comes from channels. See our guide to DIMMs per channel and module size.
• Consider CXL memory expansion on platforms that support it. ServeTheHome notes that hyperscalers use CXL devices to add capacity and reuse older DDR4 and DDR5 modules without consuming the main DDR5 channels (ServeTheHome).

Are non-binary DDR5 sizes like 48GB and 96GB a good workaround?

They can be. Non-binary modules let you reach a capacity target without jumping from 64GB to 128GB per slot, which avoids paying for memory you do not need. The catch is that demand is moving the other way: TrendForce reports buyers shifting from 96GB and 128GB modules toward 32GB and 64GB because of price (TrendForce). Compare quotes on price per GB for the total capacity you need, and confirm your platform supports the module. Our guide to 96GB non-binary DDR5 explains how they work.

When does refurbished memory make sense, and when does it not?

Nexus Compute sells new parts only, so weigh this with that in mind. Used or refurbished memory can be reasonable for lab and test systems, for out-of-support DDR4 servers you plan to retire soon, and where a failed DIMM costs nothing but a rebuild. It is a poor fit for production servers under manufacturer support, for regulated workloads, and anywhere you need a documented supply chain. The spot market shows why provenance matters: on October 2, TrendForce listed lower-grade eTT DDR4 16Gb chips at $14.00 against $83.59 for mainstream chips (TrendForce), and modules built from them can look identical. Our guide on spotting counterfeit server memory lists the checks.

What is a practical memory plan for the next 12 months?

The goal is to avoid being forced into an emergency purchase at whatever the market charges that week. That means knowing what you have, deciding early which servers will be kept, upgraded or replaced, and giving your supplier enough notice to quote alternatives rather than a single part number. A simple sequence works for most teams:

• Inventory installed DDR4 and DDR5 by server, part number and support end date.
• Keep supported DDR4 servers running and top them up from retired systems.
• Put every new server purchase on a DDR5 platform, sized to measured use.
• Approve two or three memory part numbers per platform and buy memory with the server.
• Read our 2026 AI hardware shortage playbook for the wider plan across storage, CPUs and GPUs.

Nexus Compute supplies new DDR4 and DDR5 server memory through authorized distribution, with the full manufacturer warranty, and checks every module against your platform before dispatch. Tell us what you run and what you need, and we will quote within 48 business hours, with purchase orders and net terms available for qualified organizations.