Contract prices for DDR4 8Gb DRAM chips have risen 24% in just three months. According to Wccftech's October 12 report, which cites Barclays' price analysis, the comparable DDR5 product rose only 20% over the same period, so DDR4 increased faster. Public price data also shows cases in which DDR4 memory modules cost more than DDR5 modules of the same capacity. The conventional wisdom that an older standard can be used on the cheap is no longer reliable in a market where supply is shrinking. For anyone deciding whether to upgrade memory or buy a new PC, it is now important to separate the overall memory shortage from the supply conditions specific to DDR4.
DDR4 costs more than DDR5 for 8GB SO-DIMMs
According to Barclays' analysis, contract prices for DDR4 8Gb parts rose 4% month over month and 24% over the past three months. The comparable DDR5 product rose 3% and 20%, respectively.
The "8Gb" for DDR4 here expresses the storage capacity of a DRAM chip in gigabits, which is different from the "8GB" memory modules discussed below. Also, the DDR4 and DDR5 products being compared are different parts, so this is not a comparison with chip capacity and other conditions perfectly matched.
Contract prices are the transaction prices for chips agreed between DRAM makers and large customers. They need to be distinguished from spot prices, which are formed in short-term transactions, and from the prices consumers pay for memory products at retailers. Detailed aggregation conditions for the original Barclays report cannot be confirmed from public information, so these figures should not be taken as a finalized figure for all of October, nor as evidence that retail prices in Japan have risen across the board.
The price inversion between DDR4 and DDR5 can also be seen in the DRAM contract price data published by TrendForce. In the "DRAM Contract Price (2H Aug)" that the company updated on August 31, 2026, the average contract prices for 8GB modules in the SO-DIMM form factor, a small module used in laptops and similar devices, were as follows for the second half of August.
| Product | Average contract price |
|---|---|
| DDR4 8GB SO-DIMM | $142 |
| DDR5 8GB SO-DIMM | $133 |
Average contract price per module in the second half of August 2026.
Using DDR5 as the baseline, DDR4 is about 6.8% more expensive, calculated as (142 ÷ 133 − 1) × 100. Even with capacity, form factor, collection period, and transaction type matched, the older standard is not necessarily cheaper. Note, however, that this is not a product-level comparison that matches manufacturer and speed.
On the other hand, the spot average prices as of October 5 listed on the same public page show that for 16GB desktop PC modules (UDIMMs), DDR4 is cheaper than DDR5. Those differ from the 8GB SO-DIMMs above in capacity, form factor, and trading market, so they cannot be compared directly.
In other words, DDR4 prices rising faster than DDR5 is a separate matter from all DDR4 products costing more than DDR5. When comparing memory prices, you need to check not only the standard but also capacity, product form, and trading market.
DDR4 production continuing does not mean more supply for PCs
Behind the rise in DDR4 prices is a situation in which supply is shrinking as the industry shifts to the new standard, while demand from equipment that needs the older standard remains.
In its July 3 market research, TrendForce noted that major DRAM makers continue to withdraw from the consumer market and cut production, and that increased DDR4 output by Taiwanese manufacturers alone cannot fully offset the supply decline. While demand from TVs is weak, demand for DDR4 remains in networking equipment and automotive devices. There is also a movement to switch orders from traditional suppliers to other manufacturers, concentrating orders on limited production capacity.
Micron continuing to produce DDR4 likewise does not mean more memory supply for PCs. According to TrendForce's May 26 research, the LPDDR4 and DDR4 made at Fab 6 in Virginia are mainly supplied to automotive, industrial, and networking equipment. Medical devices and the defense and aerospace sectors are also served, and the fab is positioned as a supply base for equipment that keeps using the same components over long periods.
Micron plans to increase production at Fab 6, but it will reduce production of the corresponding products at its Taiwan sites. TrendForce points out that Micron as a whole does not plan to increase LPDDR4 and DDR4 production capacity.
In other words, even when an increase in output at one fab is reported, overall market supply does not necessarily grow. What matters is which products are made at which fabs for which customers. To judge whether PC supply will recover, you need to check production transfers between fabs as well.
For buyers, the difficulty of moving to DDR5 is also a problem. As Kingston's technical explainer notes, DDR4 and DDR5 differ in electrical specifications and signaling, and the position of the notch on the module also differs. You cannot substitute DDR5 by inserting it into a DDR4 motherboard.
As a result, even as DDR4 supply falls and prices rise, demand from existing PCs and industrial equipment does not shift to DDR5 right away. The combination of shrinking supply and persistent demand makes it easy for prices to stay elevated despite the older standard.
Will cutting memory capacity in AI hardware ease the shortage?
In AI memory too, there are moves to cope with the shortage by reducing installed capacity.
In its September 29 HBM market research, TrendForce reported that makers of GPUs and dedicated AI chips are considering adopting 8-high HBM in place of the conventional 12-high configuration.
HBM is high-bandwidth memory made by stacking DRAM dies vertically, and reducing the number of layers reduces the amount of DRAM needed per stack. By holding down memory capacity per GPU, more GPUs can be equipped with HBM even with limited DRAM supply.
However, reducing capacity does not necessarily lower the unit price of memory. Each HBM stack requires a base die, and its cost does not decrease in proportion to the number of DRAM layers. With fewer layers, the base die cost is spread over less storage capacity.
For this reason, TrendForce forecasts that in 2027, the price per gigabit of 8-high products will be about 10–20% higher than that of 12-high products. Reducing the component cost per GPU does not necessarily coincide with lowering the price per unit of memory capacity.
Moreover, HBM is not the only thing competing for limited production capacity. According to TrendForce, HBM and conventional DRAM share advanced manufacturing processes and wafer capacity, and compete over production allocation.
In the company's September 30 DRAM market research, it noted that demand for memory in general-purpose servers is also increasing, against the backdrop of growing use of AI that handles multiple tasks. Manufacturers are responding by raising the production share of low-capacity server memory modules (RDIMMs), but constraints in component procurement and in assembly and testing processes mean they are still unable to fully meet demand.
Therefore, even if the memory capacity installed in AI chips falls, that does not necessarily create slack in PC memory supply. If capacity per unit is reduced and GPU shipments increase, DRAM supply continues to be consumed. Demand from general-purpose servers is also expanding, and there is no guarantee that freed-up production capacity will be redirected to DDR4.
Reducing memory capacity in AI hardware is a measure to ship more products with limited supply, not a sign of DDR4 supply recovery.
Shortage lasting through 2028: how to decide on DDR4 upgrades and PC replacement
Micron itself does not expect the DRAM shortage to be resolved in a short time.
In its September 30 earnings materials, the company said supply constraints will continue even if industry-wide DRAM bit shipments grow in the low-20% range in each of calendar 2027 and 2028.
Bit shipments are a measure of total storage capacity shipped, not the number of chips shipped. Even if total memory supply grows, the shortage will not be resolved if demand grows faster. Increased production and a supply shortage can occur at the same time.
In Micron's production expansion plans, the new ID1 fab in Idaho is scheduled to begin initial wafer output in mid-2027, while ID2 and the expansion of its Japan facility are scheduled to begin in late 2028. However, large-volume shipments will not start immediately after production begins, and ramping to full-scale capacity will take several more quarters.
Micron says it cannot foresee when supply and demand will return to balance, so one cannot go from the forecast that "the shortage will continue through 2028" to a judgment that "things will normalize in 2029." In the first place, these fab plans do not indicate when supply of DDR4 modules for PCs will increase.
Nor does a long-term contract necessarily fix prices. According to the same Micron materials, about three-quarters of expected revenue under contracts with strategic customers has a defined pricing framework, and more than half of that has price floors and ceilings. The remaining quarter or so is subject to regular negotiation in line with market prices.
In other words, the existence of contracts linked to market prices does not mean that the price ceilings and floors in all existing contracts have been abolished. Whether supply can be secured stably, and how far the impact of price increases can be contained, differs depending on contract terms.
PC users need not treat such long-term shortage forecasts as a uniform purchase deadline.
If you already use a DDR4-compatible PC and lack of memory capacity is getting in the way of your work, you will be comparing the cost of adding memory with the cost of replacing the PC itself. Moving to DDR5 requires a compatible motherboard, and if your current CPU does not support DDR5, the CPU must be replaced as well. However, some CPUs support both DDR4 and DDR5, so replacing the CPU is not always necessary.
When building a new PC, on the other hand, it is important to compare total cost including the CPU and motherboard, not just the price difference in the memory itself. Simple judgments such as "DDR4 is cheap because it's old" or "DDR5 is pricey because it's new" no longer hold. The best choice depends on how much memory you need and what kind of work you will keep doing on the PC for how many years.
TrendForce also points out the possibility that in 2027, production allocation to server DRAM will advance further and supply for PCs may decrease.
If you want to keep using a DDR4 PC for a long time, it is important to check whether you can obtain memory modules of the capacity you need and how close the cost of adding memory is getting to the cost of replacing the PC. Even if production increases across the DRAM market, how much of that capacity is directed to the older standard is a separate question. Whether you can keep using DDR4 cheaply depends not only on overall memory market supply but on supply trends for DDR4 itself.