07-17-2017 10:13 AM
So, I am working on building my sister a new laptop, for the task I have picked a Thinkpad T400, I bought this laptop for £40 off ebay and am very happy with the conditions of it, it came with an Intel P8400, 1GB of RAM and no HDD, this is fine as i have ordered a T9900, which it yet to arrive, a 250GB 850 EVO, and i planned to use the 8GB 1333 DDR3 kit out of her old laptop, this consists of two 4GB modules and are 1.35V, now the problem is that the thinkpad will refuse to boot with any of these modules, not even if one is installed, it simply throws the RAM issue post code and does not start up, i am curently running the latest bios available however it is simply not working, sadly it looks like i am going to have to purchase new RAM but I am not sure what to purchase as corsair apparentsly have issues with the T400 and Crucial recommend 1600mhz DDR3L (1.35V) so i am not sure if this will work, could you let me known of known working memory, why is the current memory not working and will the crucial reccomended stuff work?
Solved! Go to Solution.
07-17-2017 02:27 PM
Memory spec for a T400 is:
2GB std / 8GB max / PC3-8500 1066MHz DDR3, non-parity,
dual-channel capable, two 204-pin SO-DIMM sockets
4GB OEM part: 55Y3708
4GB PC3-8500 DDR3 Low-Halogen SODIMM 55Y3708
The memory from her old machine(1333 MHZ) will not work, unless it can clock down.
The Crucial 1600 MHZ should work, since it will clock down. Crucial has a money back guarantee. I always order Cruical memory.
PC3-8500 >1066 MHZ
02-23-2018 01:21 PM
I have bought Crucial 2 x 4g DDR3l - 1600 sodimm 1.35v cl11, ct2kit51264bf160b(Crucial part #) for my T400 2765 T6u laptop. When I install it I get serval beeps and nothing else happens, black screen. I put the old ram in and it runs fine. I have heard different thing about updating the BIOS but I'm not sure how to proceed ? Any help would be greatly appreciated.
02-26-2018 12:52 AM
Welcome to the forum!
That's DDR3-12800 RAM, which in my personal experience rarely works in ThinkPads of your generation. I would recommend staying with DDR3-10600 or DDR3-8500 models, though the latter is difficult to find. Avoid any no-name RAM and anything with the word "value" on it.
02-26-2018 02:01 AM
You're welcome! And keep us posted how it goes!
04-05-2019 12:34 PM
I have the same problem, I want to install new RAM and SSD for my old T400, but i can't find DDR3-1066 memory. I consider choosing a DDR3-1333 Samsung, could you let me know if this memory work ?
Here is image of RAM
For SSD, would you suggest some SSDs from Samsung, Intel or Crucial to me? will 7mm SSD fit T400 without 9.5 mm adaptor?