Found out my laptop Ram CAS Latency is mixed. Is that bad?

[Memes]

Laptop came with 8GB and I wanted to have 16 GB and I didn't want to spend extra money on buying 2 sticks so I just got one instead and used the generic one as well. I found the one that is exactly the same and when installed, laptop booted up and everything was fine. So a year later I look at my ram specs for no reason and found out that my Corsair ram and the other ram has different CAS Latency. Everyone I talked to and the responses on this fourm said it was fine to mix match ram if they match the speeds and everything but didnt say anything about CAS Latency. It won't like fry my laptop would it?

Pictures below

https://steamcommunity.com/sharedfiles/filedetails/?id=2162499854

https://steamcommunity.com/sharedfiles/filedetails/?id=2162499216

[Bad 💀 Motha]

If it works without causing all sorts of random crashes then it's not a problem. The bios will just use the higher/slower Cas timings for all installed ram.

Pictures just show what's possible for that ram based on its various profiles. Click the other memory tab to show you how it's actually running.

[_I_]

most cheap laptops they dump in whatever ram is the cheapest and will do the job

ddr speed = freq * 2
the 2333 (1663 * 2) cl 16 is the best xmp/spd profile (2333 / 16 = 145) its pretty bad even for oem/generic

the corsair dimm is slightly better
2400 / 16 = 150, but still at the generic performance level

its hard to find high performance laptop dimms with larger size and still 1.2v

you can try overclocking the generic dimm to 2400 (1200mhz), its not a huge jump
test with ibt or prime95 blend for a few minutes, if it does not crash call it stable enough

but just having more ram and in dual ch will help alot more vs the single 8g dimm

[KeplersConjecture]

Its not ideal, but not a huge problem, the laptop will just use the slower common CAS timings.

You can get a matching Corsair 8g DDR4 2400 stick for about 32usd. Up to you if that is worth it or not.

[Memes]

So pretty much nothing would go wrong the laptop would just match the speed to both rams right?

[_I_]

when mixing ram its best to use common speed and timings with both kits
they can run with lower speed and higher timings

[Memes]

Yeah ik but didnt know about the cas latency had to be the same as well. I'll just buy the 2 of the same ram sticks in the future

[r.linder]

If it works, it's fine. OEMs do that all of the time in both laptops and desktops.

[vadim]

_I_ eredeti hozzászólása:

when mixing ram its best to use common speed and timings with both kits
they can run with lower speed and higher timings

This ^. Timings difference never makes any problem for me.

[Bad 💀 Motha]

As long as both are the same speed, like 2133, if that's what the original one was, then you should be fine.

Then both should have a range of CAS timings similar enough that the BIOS should be able to determine what can work for both via SPD "Auto".

In the end it should settle for the same speed (2133, 2400, 2666 Mhz), CAS timings (i.e. 16-16-16-24-32-2T) and Voltage, which for under 2800mhz DDR4 typically should be 1.2V

What I also never like to mix are the chip makers on the actual RAM. Such as Hynix, Micron, Samsung. As you are just more likely to have stability issues by mixing them.