Thinkpad X220 16GB 1866 DDR3L

[tmpman123]

I currently have a thinkpad x220 laptop with the latest 1.46 BIOS mod (unlock speed to 1866). When I try to install the new 2x8GB DDR3L 1866 1.35v RAM from crucial.com I get the 1 3 3 1 beep error meaning memory error. In this case is the RAM defective or the thinkpad x220 doesn't support DDR3L RAM?

Thanks

[RealBlackStuff]

Did you load the original Lenovo 1.46 BIOS?
That has NO 1866 unlock!
For that you need the modded BIOS from here: http://x220.mcdonnelltech.com/resources/

[tmpman123]

I do have the latest 1.46 BIOS and then I mod it to make it unlock the 1866mhz speed as I heard that any BIOS version beyond 1.28 will result 1333mhz max RAM speed. I also tried this RAM in my other thinkpad t420 laptop and it still giving me the 1 3 3 1 memory error beep code. So in this case is the RAM bad?

[RealBlackStuff]

I think more likely that you goofed somewhere doing that mod yourself.

[olex126]

My X220 Tablet is still on BIOS version 1.26 and I just installed a pair of Crucial 8 Gb (16 Gb total) DDR3L-1866 1.35/1.5V SODIMMS...working well. For reference, they are Crucial Part #: CT2K102464BF186D.

Will try these in the X220 this weekend, (need to do a McDonnell BIOS update in this one as well) but I would expect the same results.

Dave