[coreboot] T520 2630QM 16GB DIMM

[Arthur Heymans]

tho at tricnet.de writes:

> Hi,
>
> TL;DR - Has anybody either successfully used 16GB DDR3 modules on
> SandyBridge, can rule it out, or has ideas about how to dig deeper?
>
> I recently bought 2 crucial 16GB DDR3 SODIMM modules to upgrade my
> T520 (2630QM CPU) to 32 GB. As it didn't work I did some research and
> found a couple of postings blaming the problem on Intel not providing
> proper memory reference code (e.g.
> http://forum.notebookreview.com/threads/upgrading-ram.756463/page-2)
> preventing the BIOS from initializing the RAM.
>
> When I looked for alternative BIOSes I came across coreboot. Compiled
> and installed it - works fine with 2*8GB modules. With one or two 16GB
> modules I still saw the SeaBIOS info but then it crashed. Adding
> memtest as a secondary payload and starting it worked, but memtest
> crashes instantly when it starts testing.
>

According to Sandy bridge datasheets only up to 4GB DDR3 technology is
supported, which makes it possibly to use dimms with 2 ranks, with each
rank having a capacity of 4GB, hence max 8GB per DIMM.
This is a hardware limitation.
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Kind regards
-- 
Arthur Heymans