RAM issue in iStat

mattspace

macrumors 65816
Original poster
Jun 5, 2013
1,241
961
Australia
Just wondering if anyone else has noticed this, or if it's "normal". Something I can't recall seeing before "CHA - SPD".

istat.png


sysinfo.png
 

crjackson2134

macrumors 601
Mar 6, 2013
4,588
1,692
Charlotte, NC
The SPD (Serial Presence Detect) chip on a memory module is an additional chip holding 128Hex bytes of information about the module.

This identifies the module to the BIOS during POST so the Motherboard knows its characteristics and timings that can be used.
 

mattspace

macrumors 65816
Original poster
Jun 5, 2013
1,241
961
Australia
The SPD (Serial Presence Detect) chip on a memory module is an additional chip holding 128Hex bytes of information about the module.

This identifies the module to the BIOS during POST so the Motherboard knows its characteristics and timings that can be used.
Interesting to know. Is there a logic as to why only one DIMM has the tag, and why it stays with the first slot, even when the (identical) DIMMS are rotated?