VRM HeatSink is the components that convert your 12V to the voltage your CPU needs, Processor heat sinks are essential to keep your system running at maximum efficiency and minimizing costly downtime and repairs. Manufacturer Part Number(s): Large/Left side Heatsink Part Number: J4642, 0J46J2, CN 0J46J2 Small/TOP Heatsink Part Number: 4D5V9, 04D5V9, CN 04D5V9 Reference list of compatible with Dell Desktop Models: Aurora R10 Ryzen Edition (AWAUR10) What's in the Box 1x Large (Left side) VR Heatsink 1x Small (TOP) VRM Heatsink