16GB DDR4 Laptop RAM: Live SO-DIMM Prices

16GB DDR4: what you are buying

Sixteen gigabytes of DDR4 laptop memory is sold two ways: as a single 16GB SO-DIMM, or as a pair of 8GB modules. The total is what every price on this page is divided by, so the two compare directly per gigabyte, and the module count beside each listing tells you which you are looking at.

In a laptop the choice between them is usually made for you by the machine. A laptop with one free socket can only take the single module. A laptop with two sockets that already has 8GB fitted can reach 16GB by adding one 8GB module, which is not what this page lists, or by replacing what is there with a matched pair. Count the sockets and what is already in them before deciding which listing is relevant at all.

DDR4 SO-DIMM is the memory of the laptops that came before the move to DDR5. The number of 16GB listings in stock today is printed at the top of the page.

What is in stock at 16GB DDR4 today

On 2026-10-04 we hold 40 new, non-ECC DDR4 laptop SO-DIMM listings totalling 16GB from 9 brands (SK hynix, G.Skill, Crucial, TeamGroup, Kingston, Samsung, Lexar, PNY, Patriot). The module layouts on offer, with counts, are 1 x 16GB (27), 2 x 8GB (13). The stated rated speeds present at this size are DDR4-2133, DDR4-2400, DDR4-2663, DDR4-2666, DDR4-3200, printed as the listings give them: they are the makers' specifications and we neither rank kits by them nor call any of them worth a premium.

The cheapest is SK hynix 16GB DDR4-2400 at $81, or $5.06 per gigabyte; the median across the size is $7.13 per gigabyte. The gap between them is worth as much as either number: a floor far below the median means the cheap end is one or two kits deep, and a floor close to it means the size is priced tightly together. The plausibility floor for this exact size is $3.21 per gigabyte, computed from 40 established-brand listings; a kit priced under it is priced where a counterfeit would be, and is a reason to check the seller, not a verdict.

How 16GB prices against the neighbouring sizes

Per gigabyte, at the cheapest kit for each size and on the date above: 32GB at $5.78 per gigabyte (16GB is -12.4% against it). That is a levels comparison of single cheapest kits, so it can change because one kit sells out or appears, with no seller changing a price. It tells you where the cheapest gigabyte is today, which is useful for deciding what to buy today; it does not tell you that prices moved.

The per-gigabyte view is worth having and it is also the reason for caution. A larger kit that costs less per gigabyte is still a larger purchase, and the cheapest gigabyte you do not need is the most expensive one you can buy. The next section is about that.

Who needs 16GB, and who does not

Sixteen gigabytes is the step many owners of older 8GB laptops take, and it is the right question to ask of a machine that has started to struggle with a browser full of tabs and a video call at the same time. Whether it helps depends on whether memory is the thing running out. Your operating system's own resource monitor will show it: if the memory in use sits near the total while the machine is slow, more capacity addresses that; if it does not, a module will not fix what is slowing it down.

If the laptop already has 16GB, this page is not your upgrade. The sizing page works through which uses need more, from the software makers' own published requirements.

Check your platform first

A laptop's documented maximum can be lower than the module sizes now on sale. The laptop maker's specification page for your exact model is the authority on the maximum and on whether any memory is soldered; a listing's compatibility claim is not.

Do not buy 16GB on panic

A 16GB DDR4 upgrade for an older laptop is a modest purchase, which makes it an easy one to make in a hurry. If the machine is working and memory is not what is running out, the price today is a price you can decline. If it is, buy the 16GB the laptop is documented to take, and stop there.

Frequently asked questions