Hello Iru,
Here is sku you are using:
I am very sure 16MB DIMM (single memory stick) is NOT supported by MRC. Since I used to work with both IVB Emerald Lake 2 and Cougar Canyon 2 INTEL CRBs (legacy BIOS driven). Both of them had four DIMM sockets (2 channels), and both of them could support to maximum of 8MB of DDR3 per socket. In total 32MB.
I had 2MB x 2: 4MB at that time (Q1 2012). Worked also with 4MB DIMM modules as well (as I recall).
Not to mention that IVB FSP is derived from IVB BIOSes (SEC + PEI phases), thus IVB FSP MRCs are IVB BIOS MRCs (true for other/newer INTEL skus as well).
Zoran
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