Hypertherm PCBS-0124 - Manual (Page 15)

Installations
11
2.1.3
Memory Module Installation
Figure 5 display the notch marks and what they should look like on your
DIMM memory module.
DIMMs have184-pins and two notches, that will match with the onboard
DIMM socket. DIMM modules are installed by placing the chip firmly into the
socket at a 90-degree angle and pressing straight down (figure 6) until it fits
tightly into the DIMM socket.
Figure 5: DIMM Memory and 184-pins Socket
Figure 6: Memory Installation