Compatibility really comes down to four questions
There are dozens of parts in a computer, but the compatibility chain is shorter than you think. The order is as follows: first you choose the processor, the processor determines the motherboard, the motherboard determines the memory, all of them together determine the power supply, and the case determines whether they all fit physically. When you follow this order, the possibility of incompatibility is largely eliminated.
1. Socket
The physical connection between the processor and the motherboard. If it is wrong, the part does not seat in the socket at all.
2. Memory generation
DDR4 and DDR5 cannot be fitted in place of one another. Whichever the mainboard supports is the one that is purchased.
3. Power
The power supply must comfortably cover the system's peak consumption.
4. Physical dimensions
The length of the graphics card, the height of the cooler and the form factor of the motherboard must fit into the case.
1. Processor and motherboard: socket and chipset
Every processor family fits a particular socket. On the current desktop side, Intel LGA 1700 and LGA 1851on the AMD side AM4 and AM5 sockets are widely used. The socket name is stated both on the processor and on the motherboard; the two must be exactly identical.
However, the socket fitting is not enough on its own. There can be different processor generations on the same socket, and for the motherboard to recognise that generation, a BIOS update may be required. This is one of the most frustrating situations that come into the service centre: the parts have been chosen correctly, everything is installed, but the computer does not produce a picture. If the motherboard box lists a feature such as "BIOS Flashback", the update can be carried out even without a processor installed; otherwise an older processor supported by that socket is needed for the update.
Before purchasing: Search for your exact model number on the "CPU Support List" page of the mainboard manufacturer's website and check from which BIOS version onwards it is supported.
There is also a silent constraint: power delivery
You can install a high-consumption processor on an entry-level motherboard — it will fit and it will work. However, if the motherboard's power delivery stage is not sufficient, the processor will reduce its speed as it heats up and you will never see the performance you paid for. If the processor is from the upper segment, you should not save too much on the motherboard.
2. Memory: DDR4 and DDR5 are not the same thing
DDR4 and DDR5 memory modules cannot be used interchangeablyThe notch on the modules is in a different position, which means that the wrong one physically will not fit into the slot. A motherboard supports either DDR4 or DDR5; very few models support both, and even on those only one type can be used at a time.
- Buy them as a matched kit. If you are buying two modules, choose a single kit (such as 2x8 GB). Modules bought separately may use different chips even if they are of the same brand and capacity, and may run unstably together.
- The number of modules matters for dual channel. Using 2x8 GB instead of a single 16 GB makes a visible difference, particularly with the processor's integrated graphics unit.
- The speed stated on the box is not applied automatically. Memory runs at the standard speed by default; in order to obtain the speed stated on the box, the XMP (Intel) or EXPO (AMD) profile must be enabled in the BIOS. There are many people who, without making this setting, say "I bought fast memory but there is no difference".
3. Power supply: factors that matter as much as wattage
The power supply is the component on which unnecessary savings are made most often in a system and which causes the most damage. An insufficient or poor-quality power supply does not only break down itself; when it fails, it can take the motherboard, the graphics card and the drives connected to it with it.
- Calculate the total consumption and leave headroom on top of it. After the consumption of the processor and the graphics card has been added up, a clear buffer must be left for the other parts and for the efficiency margin.
- Check the connectors. Some current graphics cards use a new connector called 12V-2x6 / 12VHPWR. If your power supply does not have one, it works with an adapter, but a model that supports it directly is always sounder.
- Check the certification. An 80 PLUS certification gives you an idea of the efficiency. Stay away from uncertified products of unclear brand origin.
When renewing an entire system, carrying over the power supply from the old case is a common choice; however, the capacitors of an old power supply may be worn out. We do not recommend transferring a power supply that is more than five years old to a new system.
4. The case: the most frequently overlooked compatibility factor
Everything may be electrically compatible, but if the part does not fit into the case the job is not finished. The three dimensional problems we see most often at the service centre are the following:
- The length of the graphics card. High-segment cards are quite long; the maximum card length the case allows is stated in its technical specifications.
- The height of the processor cooler. Tower-type coolers can touch the side panel. Check the case's "CPU cooler height" value.
- Mainboard form factor. ATX, Micro-ATX and Mini-ITX are different sizes. A large motherboard will not fit into a small case; a small motherboard will fit into a large case.
If you are considering liquid cooling, the case specifications also state on which surface of the case and at what size in millimetres the radiator can be mounted.
5. Storage: is there a slot, and of what type?
Most modern mainboards have an M.2 slot, but not every M.2 slot is the sameSome support only NVMe, some only SATA and some both. The type of drive you buy must match the type supported by the slot.
In addition, on some motherboards certain SATA ports are disabled when the M.2 slot is in use. If you are building a system with several drives, it is worth reading this note in the motherboard manual. If you still cannot decide between an SSD and an HDD, our SSD or HDD comparison is worth a look.
If you would rather not check compatibility yourself
Carrying out all these checks one by one takes time. For this reason, on our website there is PC Builderwhich we have prepared for you: you choose your processor and it shows you the compatible motherboard, the memory and the other parts step by step. Because the listed products are genuine items from our stock, you also see the total price instantly.
There is also this: assembly of a system you configure with the wizard is free of charge. We do not send the parts box by box — we assemble them, tidy up the power supply cabling, configure the BIOS settings, test the system and hand it over in working condition. If you are someone who does not want to build it yourself but is also not willing to pay the price of pre-built systems, this is exactly the gap in between.
If you would like to browse the components directly Processor, Motherboard, memory, Graphics Card and PC Case our categories are listed with current stock.
Final checklist before building
- Are the processor socket and the mainboard socket exactly the same?
- Is this processor on the mainboard's CPU support list, and is a BIOS update required?
- Does the memory generation (DDR4/DDR5) match the mainboard, and am I buying a single kit?
- Does the power supply cover the total consumption with a margin, and does it have the connector for the graphics card?
- Do the length of the graphics card and the height of the cooler fit in the case?
- Is the mainboard form factor compatible with the case?
- Does the M.2 slot support the type (NVMe/SATA) of the drive I am buying?
If the answers to these seven questions are clear, the system will run without problems. If there is a point you are not sure about, before you buy the parts you can call us on 0530 338 21 91 and ask; we will look at your list and tell you whether there is anything incompatible.