Computers & Electronics

Help me add compatible Laptop RAM-E570

  • Last Updated:
  • Aug 18th, 2017 8:02 am
[OP]
Sr. Member
Jan 11, 2010
912 posts
298 upvotes

Help me add compatible Laptop RAM-E570

How precise does the speed and timings have to be when adding a new stick?
Laptop is the Lenovo ThinkPad E570 boxing day deal
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Looks to be DDR4-2400 (1200 MHz) with 15-15-15-35 timings at 1066 or 17-17-17-39 at 1200.

This one https://www.newegg.ca/Product/Product.a ... 6820232153
same speed but timings slighty off at 16-16-16-39. Is that a big deal?

This one https://www.newegg.ca/Product/Product.a ... 00PT-00008
http://www.crucial.com/usa/en/ct8g4sfd824a
same speed, all it tells me for timing is CL=17 and dual ranked

this similiar crucial one https://www.amazon.ca/dp/B01BIWKP58/ref ... nkCode=df0
http://www.crucial.com/usa/en/ct8g4sfs824a
same speed, same CL=17 but single ranked

There is an ebay option for the exact same model provided with the laptop.
http://www.ebay.com/itm/8GB-DDR4-1Rx8-P ... SwbopZUskK
but it looks to be used listings.

What is the best option to make this upgrade as smooth as possible?
3 replies
[OP]
Sr. Member
Jan 11, 2010
912 posts
298 upvotes
birthdaymonkey wrote: It doesn't usually matter. Just get the cheapest one.

Wow, is RAM ever overpriced right now. This is the cheapest in PCPartPicker:

https://www.newegg.ca/Product/Product.a ... 6820232186

It's a better choice than the G.Skill you linked - cheaper and also shipped from Canada rather than USA.
really? I read a bunch of stuff how it can be 50-50 if ram will work if matching different pairs because of timings and such
Deal Addict
User avatar
Nov 15, 2011
2209 posts
1079 upvotes
Saint John
icecoal wrote: really? I read a bunch of stuff how it can be 50-50 if ram will work if matching different pairs because of timings and such
50-50 is a big exaggeration. More like 95-5 in favour of success. The computer will automatically clock the modules to the lowest common denominator. So if one of your sticks is 2400 cas 15 and one is 2400 cas 16, the computer will run them both at 16. Similarly, if one of your DIMMs is 2133MHz and the other is 2400MHz, the system will run them both at 2133 to ensure things work properly.

I'm running two unmatched 2133 modules in my T460s that I'm typing this from - one of them is soldered to the mainboard (4GB) and I bought a generic Hynix 4GB module for 8GB total - works perfectly fine in dual channel mode, 100% stable. In my wife's Pentium G4600 mini desktop, I've got two unmatched (different brand) 8GB SODIMMs for 16GB total, also works perfectly in dual channel.

There's no guarantee of compatibility (especially when DDR4 was brand new) but with the current state of affairs - now that OEMs have released 2nd-gen DDR4 products like your T570 and BIOS updates for older products - chances are excellent that two different memory modules will "just work" without any issues.
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