DDR4 or DDR5: Which RAM to Choose for a New Computer or an Upgrade

RAM is one of the most straightforward ways to speed up a computer. But when buying, it's easy to get lost in the abbreviations: DDR4, DDR5, frequencies, timings, XMP, EXPO. One question comes up especially often: should you move to DDR5 or stay with DDR4? Let's look at how these generations of memory differ, what to consider when upgrading and how to avoid buying modules that physically won't fit your computer.

The key point: DDR4 and DDR5 are incompatible

This is the most important thing to know. DDR4 and DDR5 modules have different connectors and voltages and physically won't go into each other's slots. The type of memory is determined by the motherboard and processor. You can't "add DDR5" to a DDR4 computer or mix modules of different generations. So the choice between DDR4 and DDR5 is really a choice of platform.

How DDR4 and DDR5 differ

Speed

Typical DDR4 speeds range from 2400 to 3600 MT/s, while DDR5 starts at 4800 and reaches 6000–8000 MT/s. DDR5's bandwidth is noticeably higher, which helps processors with many cores, integrated graphics, video processing and some games.

Latency

DDR5's timings are higher in absolute numbers, but thanks to the higher frequency the real latency is comparable to DDR4. In practice the difference is unnoticeable in most everyday tasks.

Module capacity

DDR5 allows larger modules — 24, 32 and 48 GB per module have become common. That's handy for workstations and professional tasks.

Price

DDR4 is cheaper and easier to find, especially second-hand. DDR5 has come down in price, but the platform as a whole — board and processor — usually costs more.

Other features

DDR5 has an on-module power controller and basic error correction built in. The first start-up of a computer with DDR5 can take longer because of memory "training" — that's normal.

If you're upgrading an existing computer

If your computer or laptop runs on DDR4, there's no choice — only DDR4 will do. Adding memory up to 16–32 GB on the existing platform is one of the best-value ways to speed up a system. It's important to choose modules carefully: matching speed, capacity, number of ranks and board support. It's best to fit identical modules in pairs so dual-channel mode works.

If you're building a new computer

• Modern platforms for new processors often support only DDR5. For a new build intended to last several years, DDR5 is the logical choice.
• A budget build can be cheaper on a DDR4 platform, especially if every hundred lari counts.
• A gaming PC benefits from fast DDR5, but for many games the graphics card and processor matter more.
• Video, 3D and virtual machine work — large-capacity DDR5.

Laptops

In laptops the memory type is fixed, and in many modern models it's soldered to the board and can't be changed at all. So when buying a laptop you need to choose enough memory from the start: 16 GB is a sensible minimum for 2026, and 32 GB for professional work.

XMP and EXPO

Modules are often sold with a rated speed that only applies once an XMP (Intel) or EXPO (AMD) profile is enabled in the BIOS. Without it, the memory runs at its base speed. But these profiles aren't always stable with every board — if you get crashes in games or blue screens, they're worth checking.

Common mistakes

• Buying memory without checking the slot type — DDR5 for a DDR4 board.
• Mixing modules — different speeds and makes lead to instability.
• One module instead of two — losing dual-channel mode and performance.
• Buying memory for a laptop where it's soldered and can't be replaced.

The simplest way to avoid all of these is to check before you buy. The exact motherboard or laptop model, the number of free slots and the maximum supported capacity are easy for a technician to confirm, and a few minutes of checking prevents returns, wasted money and the frustration of modules that won't fit.

What our technician does

1. Identifies the memory type, the number of slots and the maximum capacity the board supports.
2. Selects compatible modules, taking speed and dual-channel mode into account.
3. Fits the memory, enables the XMP/EXPO profile and checks stability.
4. Tests the memory for errors, especially if there are blue screens or crashes.
5. Helps plan a new DDR5 build to suit your needs and budget.

A real example

A photographer in Saburtalo bought 32 GB of DDR5 online to speed up his computer for Lightroom — and found the modules wouldn't go into the slots. His board only supported DDR4. Our technician helped him arrange a return, selected two 16 GB DDR4 modules at the right speed, fitted them and enabled the XMP profile. His memory went from 8 to 32 GB, and exporting photo shoots became almost twice as fast — without replacing the board or processor.

If you're planning a new build, it also makes sense to leave room to grow: two 16 GB sticks today with free slots for later is better than four filled slots with no way to expand.

Call a technician

If you want to add memory or build a new computer, we'll come to any district of Tbilisi around the clock. Learn more on our component upgrades, custom PC build and computer diagnostics pages.