How much RAM do you need? And how to tell if your PC is running out
The right amount of memory depends less on the PC than on what you keep open at once. Rather than guessing, Windows can show you whether yours runs out — and if it does, memory is one of the cheapest upgrades there is.
Updated 8 October 2026
The short answer
| What you do | Enough | Comfortable |
|---|---|---|
| Web, email, office work | 8 GB | 16 GB |
| Gaming | 16 GB | 32 GB, for recent games with a browser, chat or streaming open alongside |
| Photo and video editing, programming, virtual machines | 32 GB | 64 GB or more for large projects |
Windows 11 runs on 4 GB, but slowly; 8 GB is the realistic minimum today. A browser with many tabs open is often the biggest user of memory on a PC, ahead of the games.
Check whether your PC is running out
The table is a starting point; what you keep open matters more. Open Task Manager (Ctrl+Shift+Esc), choose Performance → Memory, and leave it open while you do what you normally do, with the programs you always have open. Then read:
- In use, against the total at the top right. Windows uses spare memory to keep recently used files ready, so a high figure is not a problem by itself; very little Available is.
- Committed. If its first figure is well above the memory installed, programs have been promised more than the PC has, and Windows is using the drive to make up the difference.
- Compressed, in brackets after In use: Windows squeezing memory to make room. A few hundred megabytes is normal; gigabytes means memory is short.
The clearest sign is in Resource Monitor (search for it from Start) → Memory: Hard Faults/sec in the hundreds or thousands while little memory is available means Windows is reading memory back from the drive. That is what makes a PC stutter, and short freezes are the symptom most people notice.
What is using it
On the Processes tab, click Memory to sort by it. Browsers run every tab, extension and video as a separate process, so they often top the list; Chrome and Edge both have a memory saver setting that frees the tabs you are not looking at. Chat and meeting programs such as Teams and Discord also use more than you might expect.
Before you buy more
- Check what you have. The same Memory page shows Slots used (for example 2 of 4), Speed and Form factor: DIMM in desktops, SODIMM in most laptops.
- Check it runs at full speed, in dual channel. Memory below its rated speed, or a single stick, costs performance whatever the amount: rated speed and dual channel.
- Laptops: many have memory soldered to the board, and some have a slot free. The laptop’s manual or its maker’s support page says which; soldered memory cannot be added to.
- Desktops: match the type — DDR4 and DDR5 do not fit each other’s slots — and buy a matched kit of two rather than adding one odd stick. Different sticks often refuse to run at their rated speed together.
- Fit sticks in the slots the motherboard’s manual gives, usually the second and fourth from the processor for two sticks, so that they run in dual channel.
How Bottleneck checks this
A scan reads every memory stick — its size, type, rated and actual speed, and slot — and reports too little memory for how you use the PC, a single stick, mismatched sticks, and memory running in single channel or below its rated speed. It knows when memory is soldered to the board, and never tells you to add to it.
Bottleneck’s While you work check answers the real question: it watches 10 to 30 minutes of your own work and reports whether memory actually ran out, and for how long. Pro names the programs that held the most memory at the time.