A RAM SO-DIMM "2x2GB 2Rx8 PC2-6400S-666-12" is currently installed in my Sony Vaio laptop.
I would like to exchange this for "2x4GB 2Rx8 PC2-6400S-666-13-E1".
My laptop is 8GB capable.
My question is what is the difference between the label "12" and "13-E1" in terms of compatibility? Can I install this in my Sony Vaio without hesitation?
This means that the latency of the main memory should be released. One would have to be CL12 and the other CL13 memory. Since you are exchanging both modules at the same time, that shouldn't be a problem. However, I can already tell you that it will not be easy to get 8GB (2x 4GB) DDR2-800 SoDIMM RAM, at least not an affordable one. Memories of this size were not standard back then and are accordingly rare and expensive today.
You have to pay attention to the design, there are DDR2 RAM https://www.ebay.de/...382?chn=ps andhttps://www.amazon.de/Motoeagle-200-Pin-Unbuffered-Notizbuch-Arbeitsspeicher/dp/B08GFZZYZS/
Otherwise it doesn't matter, because you change both modules together, the main thing is: DDR2 with 666 MHz.
But I wouldn't upgrade for such an old laptop, I doubt it's worth it. If you then upgrade to an SSD rather than more RAM.
Because your current 4 GB are even enough for Win 10.
But save on a new laptop… Or desktop PC.
Small faux pas: DDR2 with 666 MHz
PC2-6400S-666-12 is not a DDR2-666 RAM. That is DDR2-800 SoDIMM CL12-6-6-6 RAM. PC2-6400 corresponds to DDR2-800 RAM.
Many thanks for your response!
I have already retrofitted SSD. I have had the Vaio for over 10 years and I'm satisfied with it. For my purposes it is enough:-)
Many thanks for your response!
Can you tell the difference between the CL12 and CL13? I think less is better.
Yes, less is faster, but not noticeable, maximally measurable.
All offers are advertised with the clock frequency: 800Mhz, although there's also the designation "PC2-6400S-666" on the bolt. Is that wrongly labeled everywhere?
No, you misunderstood that. DDR2-800 and PC2-6400 RAM is the same. 800MHz effectively corresponds to 6400MT / s (mega transfers per second). The S stands for SoDIMM, i.e. Laptop / notebook memory. And 666-12 is the timings, not the clock, and that stands for CL12-6-6-6 RAM.
Ah ok now I understand thank you:-)
