In short
- 8GB is the comfortable minimum for Windows 10 and a modern browser. 4GB machines benefit the most from an upgrade.
- Task Manager shows how much you have and how many slots are free. CPU-Z shows the exact type.
- DDR3, DDR3L, DDR4 and DDR5 are physically different and not interchangeable. Laptops use SODIMM; desktops use full-size DIMMs.
- Memory costs more than it did in 2024. It's still worth it at 4GB; at 8GB, an SSD is the better spend.
Memory is the upgrade with the highest ratio of "easy to do" to "easy to get wrong." The swap takes minutes. The buying is where people go wrong, because there are four generations of laptop memory that look almost identical and fit none of each other's slots. Ten minutes of checking saves a return.
Do you need it?
Open Task Manager (Ctrl+Shift+Esc) → Performance → Memory. Two numbers matter. The total in the top-right corner is how much you have. The "In use" figure with a few browser tabs open is how much you're using. If you have 4GB and it's regularly over 3.5GB in use, the machine is spending its time shuffling data to disk, and more memory will help noticeably. If you have 8GB and it's rarely full, memory isn't your bottleneck; the drive or startup clutter probably is.
Microsoft's official minimum for 64-bit Windows 10 is 2GB, which tells you how little that figure means in practice. For Windows 10 with a modern browser, 8GB is the comfortable minimum in our experience, and 16GB is plenty for almost anyone who isn't editing video.
Step 1: how many slots, and how many are used
Same screen. Bottom right, look for "Slots used: 1 of 2" or similar. One free slot means you can add a second stick and keep the one you have, which is the cheap upgrade. "2 of 2" means you'll replace a stick, and "1 of 1" means one stick, replaced. Some thin laptops have memory soldered to the board with no slots at all; Task Manager will show "0 of 0" or the maker's spec page will say "onboard," and there's nothing to upgrade.
Also note the Speed (say 1600 MHz or 2666 MHz) and Form factor (SODIMM for laptops, DIMM for desktops) shown on the same screen.
Step 2: which type
Task Manager doesn't always say DDR3 versus DDR4. The free tool CPU-Z does: install it, open the SPD tab, and it names the type, size, speed and voltage of each installed stick. Match all of them.
| Type | Typical laptop years | Notes |
|---|---|---|
| DDR3 (1.5V) | 2008–2012 | Increasingly hard to find new. Secondhand sticks are plentiful and low-risk. |
| DDR3L (1.35V) | 2012–2016 | Most laptops from this era need the low-voltage "L" version. DDR3L works in DDR3 slots, but not the reverse. When in doubt, buy DDR3L. |
| DDR4 | 2016–2022 | The common case for the machines that just missed Windows 11. Speeds from 2133 to 3200; a faster stick runs at the slower speed of the slot, which is fine. |
| DDR5 | 2022 onward | Often soldered. Check the spec page before buying anything. |
If you'd rather have a configurator do it, Kingston's memory finder and your laptop maker's own spec page (search the exact model number on the support site) both list compatible modules. Crucial's configurator was the usual recommendation for years, but Micron is closing the Crucial consumer brand, so don't build a plan around it.
Step 3: what to buy
Match the type, the form factor and (roughly) the speed. Brand matters less than people think; Kingston, Corsair, Patriot, Samsung and Crucial-while-stocks-last are all fine. Mixing a new 8GB stick with an old 4GB one works; you lose a little dual-channel performance, which you will not notice on a machine like this.
| Product | Best for | |
|---|---|---|
| Kingston FURY Impact 8GB DDR4-3200 laptop memory | Adding a second stick | Amazon |
| Kingston FURY Impact 16GB DDR4-3200 laptop memory | Laptops with one memory slot | Amazon |
| Kingston 8GB DDR3L-1600 laptop memory (1.35V) | Older laptops still on 4GB | Amazon |
Paid links. Prices aren't shown here because they change often; the listing has today's price.
One 2026 caveat: the memory-chip shortage has pushed RAM prices up more than SSDs, and older DDR3 sticks are getting scarce as production lines close. On a 4GB machine the upgrade is still clearly worth it. On an 8GB machine, spend the money on the SSD first if it doesn't have one, and revisit memory later.
Step 4: fitting it
- Shut down fully, unplug the power, and if the battery is removable, remove it. Hold the power button for ten seconds to drain any residual charge.
- Open the memory door. Most 2012–2018 laptops have a small panel on the underside held by one or two screws; some need the whole bottom cover off. Search "[your model] RAM upgrade" on YouTube for a two-minute walkthrough.
- Touch bare metal first, or wear an anti-static strap. Static rarely kills memory, but it's cheap insurance.
- Insert the stick at about a 30-degree angle, notch aligned with the slot, push it in firmly, then press it flat until the side clips click. To remove one, spread the clips and it pops up.
- Boot up and check Task Manager shows the new total. If the machine beeps or shows a black screen, power off and reseat the stick; it's almost always not fully in.
For the job
- iFixit Mako 64-bit precision driver kitThe right bits for laptop screws. Amazon
- iFixit anti-static wrist strapCheap insurance for RAM swaps. Amazon
Paid links. Prices change often, so we don't print them; the listing shows the current price. We earn a commission on purchases, at no cost to you.
Product links on this page are affiliate links. If you buy through one, we earn a small commission at no cost to you, and the retailer's cookies apply once you're on their site (we run none). We link only to things that fit the advice above, and we never link to replacement computers as a fix for a working one.
