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What is the difference between DIMM modules labelled as PC3L 12800S and PC3L 12800U, respectively? I guess they are both low-voltage PC3 modules but AFAIK PC3L modules run at 1.35V (instead of 1.5V) while PC3U modules run at 1.25V.

Are these both PC3L modules or is the latter a PC3U module?

The 12800S module was a SODIMM module (laptop) while the 12800U module was a DIMM module (desktop) is the letter following 12800 referring to this? None of my other DIMM modules (DIMM or SODIMM) of earlier generation have suffixes after the number.

Giacomo1968
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Joul Dalk
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PC3L 12800S is a SO-DIMM(small outline DIMM) module which is used in compact devices such as laptops and notebooks. And 12800U is a UDIMM (Unbuffered DIMM) module typically used in servers and desktop computers. I don't think there's any official naming conventions for letters after the speed in megabyte(12800).

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Nandha
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