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Explore quality tested PC hardware from verified UK sellers. Find GPUs, CPUs, RAM, motherboards, power supplies, and accessories with zero seller listing fees and comprehensive buyer protection.
CPU · GPU · Motherboard · RAM
NVMe · SSD · PSU
Monitors · Audio · Input
Browse available Accessory listings on Koukan.
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Browse available PC Case listings on Koukan.
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Upgraded your graphics card or built a new rig? List your components on Koukan in under 60 seconds. Unlike traditional marketplaces, you pay zero seller fees and keep 100% of your earnings.
Essential checks before purchasing used components to ensure zero build headaches and maximum performance.
Always match CPU socket to motherboard platform (AMD AM4 vs AM5, Intel LGA1700 vs LGA1851). Check BIOS versions if using a newer gen chip on an older chipset.
Measure GPU length (triple-fan cards can reach 340mm+) against your chassis max GPU clearance. Ensure your PSU has dedicated 8-pin or native 12VHPWR cables.
Install RAM in matched 2-stick kits (typically slots 2 & 4) to enable dual-channel bandwidth. Always verify your motherboard QVL for DDR5 EXPO/XMP speeds.
Add at least 150W-200W headroom above system TDP to absorb modern GPU transient spikes. Look for 80 Plus Gold certification and reputable OEM manufacturers.
Everything you need to know about buying, selling, and testing PC components on Koukan.