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Memory Ram

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lmkjr2022

lmkjr2022

PCHF Member
Dec 9, 2022
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I have a question. My model number for my memory Samsung 8GB DDR5 4800 MHZ 1Rx16 UDIMM DESKTOP RAM MODULE M323R1GB4BB0-CQKOD CL40.
This number when searched on ebay has used this number PC5-38400. Now when I checked eBay there was a r and u suffix for both Non-ECC Unbuffered that is
PC5-38400R and PC5-38400U. Again they are both unbuffered NON ECC. So what is the difference between PC538400R and PC5-38400U. The "R" and "U" suffix meaning. I just want to make sure I get the correct Ram.
Mike
 
#2
lmkjr2022 said:
I just want to make sure I get the correct Ram.
Click to expand...
Best to look at the cpu and the mb compatibility list
lmkjr2022 said:
The "R" and "U" suffix meaning.
Click to expand...
  1. Registered or buffered memory, which improves signal integrity (and hence potentially clock rates and physical slot capacity) by electrically buffering the signals with a register, at a cost of an extra clock of increased latency. Those modules are identified by an additional R in their designation, for example PC3-6400R.[30]
  2. Non-registered (a.k.a. "unbuffered") RAM may be identified by an additional U in the designation
from here https://en.wikipedia.org/wiki/DDR3_SDRAM#JEDEC_standard_modules
 
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