What if you could buy a cheap used DDR5 SODIMM (laptop memory) kit and transform it into a super-fast DDR5 desktop kit? That’s what electronics hobbyist Blighted Agent recently did when they succeeded in converting a SK hynix 2x 16GB DDR5-5600 SODIMM kit they got from Facebook Marketplace for $120 into a 2x 16GB DDR5-7800 desktop kit, claimed to be worth around $1,000. They also had to buy some blank DDR5 desktop memory PCBs from AliExpress for around $16 each, and a set of heatsinks for around $18.
In the above video, our hero says they bought the donor laptop 2x 16GB DDR5-5600 sticks for just $120, which is a bargain. With extra bits and pieces from AliExpress (desktop DDR5 PCBs, etc.), the total bill of materials came to $175. Blighted Agent comments that the SODIMMs used what he believed to be SK hynix A-die modules, which are the same as the ICs used in expensive desktop DDR5 modules like the G.Skill Trident Royal line.
The process began with taking the memory ICs from the donor modules using a hot air station. Then they were cleaned and had 0.45mm leaded solder balls added, using a DDR5 stencil, reballing jig, and hot air. Next, the blank desktop DDR5 PCBs were prepared. A little solder was added to the plethora of BGA connectors to be ready for the memory chips to connect to.
The old DDR5 ICs and the new desktop modules could now be mated, using flux, the preheater, hot air, and watching and prodding carefully with a dental pick.
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