Question 1

How do I know if my CPU is compatible with my motherboard?

Accepted Answer

CPU and motherboard compatibility is determined by the socket type. AMD Ryzen 7000-series CPUs require an AM5 socket, AMD Ryzen 5000-series require AM4, and Intel 12th–14th Gen Core CPUs require LGA1700. Use Koukan's free compatibility checker to verify your exact CPU and motherboard combination.

Question 2

Is my CPU compatible with my motherboard?

Accepted Answer

CPU and motherboard compatibility depends on the socket type. AMD Ryzen 7000-series CPUs require an AM5 socket motherboard. AMD Ryzen 5000-series CPUs require AM4. Intel 12th, 13th, and 14th Gen Core CPUs need an LGA1700 socket. Check your CPU's socket specification and match it to your motherboard's socket before buying.

Question 3

Can I use DDR5 RAM in a DDR4 motherboard?

Accepted Answer

No. DDR5 and DDR4 RAM use different physical slots and are not interchangeable. DDR5 has a notch in a different position. Always check your motherboard's memory specification before purchasing RAM.

Question 4

How do I know if my GPU will fit in my case?

Accepted Answer

GPU clearance is determined by your case's maximum GPU length specification, measured in millimetres. Check your GPU's length in its spec sheet and compare it against your case's maximum GPU length. Most mid-tower cases support GPUs up to 320–360mm. Use Koukan's compatibility checker to verify your exact GPU and case pairing.

Question 5

How do I calculate what PSU wattage I need for my PC build?

Accepted Answer

Add up the TDP of your CPU and GPU, then add 50–100W for other components such as storage, RAM, and fans. As a rule of thumb, add 20–25% headroom above your estimated system total and always choose a reputable brand with 80+ certification. Koukan's compatibility checker estimates total system power draw based on the parts you select.

Question 6

What does AM4 and AM5 mean for CPU compatibility?

Accepted Answer

AM4 and AM5 are AMD CPU socket standards. AM4 is used by Ryzen 1000–5000 series CPUs and is found on A320, B450, B550, X470, and X570 motherboards. AM5 is used by Ryzen 7000 series and requires B650, X670, or X870 motherboards. The two are not cross-compatible.

Question 7

Does my CPU determine whether I need DDR4 or DDR5 RAM?

Accepted Answer

Whether you need DDR4 or DDR5 RAM is primarily determined by your motherboard, not your CPU alone. Many modern platforms support both memory types, but the actual type depends on your specific motherboard model — some are DDR4-only, others DDR5-only. Always check your motherboard's memory specification before purchasing RAM.

Question 8

How do I check if my PC parts are compatible for free?

Accepted Answer

Koukan's free PC Build Compatibility Checker at koukan.co.uk/pc-builder lets you add your CPU, motherboard, GPU, RAM, PSU, case, cooler, and storage to instantly check for socket mismatches, clearance issues, power problems, and DDR type conflicts. No account or sign-up required.