I tried to upgrade to 16GB, but was not able to and found out that the chipset doesn't support it, only 8GB max. When I tried a single 8GB dimm the system would not boot, and I couldn't even install Windows fresh. any ideas?

It can only do 4gbx2, just like the X301.
It doesn't recognize 8gb dimms.

Brad on the forum uses has 8gb modules.. expensive, he used Lenovo FRU 03X6401.

lies, x301 supports 16GB total

When I wrote that a T410 worked with 8Gb x 2 for a total 16Gb I had a 32 bit OS installed. The BIOS did indeed recognize the ram and the 32 bit OS booted and only of course could use up to 4Gb. When I attempted to install an 64 bit OS I had no success.

I have not attempted to use 8Gb dimms on an X301.

Brad

FYI.............

Sorry I hadnt seen these section of forum(s) for long time ....didnt have much spare free time to post info etc here ,,,,,,,,,,,,,,,,

RamDisk 11 for Desktop Systems

I have used this and their other products very sucessfully for years ( due to windows RAM restrictions) ; with Xpx64, Win7X64. Any 'spare' memory - I have either used as RAM DISK or SUPER CACHE......

...still have my OLD trusty T60P (15in) and T61p - both with IPS - and never needed to install SSDs in them; mainly due to above use!

These features are now hardly used now on our systems due to SSD - much cheaper !

Hope this helps someone (nope dont work for them , not their reseller etc )
Cheers