Intel has reportedly denied an RMA request for a Core i9-14900K CPU due to the use of liquid metal thermal paste, according to the latest report from HKEPC. The liquid metal caused corrosion on the CPU's integrated heat spreader (IHS), removing the chip's markings, including the processor model, batch number (FPO), and 2D Matrix (ATPO). This situation has raised concerns about the risks associated with using liquid metal as a thermal paste, as it can void the CPU's warranty.

Using liquid metal, which incorporates different metal alloys, offers excellent thermal conductivity, but it is also electrically conductive. Improper application can lead to damage to components, such as if the liquid metal drips over to capacitors on the chip or the pins. The reaction of liquid metal with different materials, like copper, nickel, or aluminum, can also lead to issues, such as the inability of liquid metal to gel with aluminum, necessitating the use of a copper heatsink.

Despite its cooling benefits, using liquid metal isn't worth the risk for the average consumer. For enthusiasts who want to overclock and maximize cooling performance, it may be more advisable to delid the chip and replace the TIM with liquid metal, rather than simply applying it to the surface of the IHS.