the following patch was just integrated into master: commit 7f731f8d4f0d4dbc109869032f4e993995eac045 Author: Timothy Pearson <tpearson@raptorengineeringinc.com> Date: Fri Apr 29 00:38:29 2016 -0500 nb/amd/mct_ddr3: Fix x4 DIMM receiver enable training on Fam15h The existing Family 15h receiver enable training code stored temporary delay values in the wrong variables, leading to the requisite averaging of delays across nibbles not being applied. This in turn made x4 DIMMs less stable than they should have been. Store temporary nibble delay values in a dedicated array. Change-Id: Ic5da898af7d689db4110211f89b886ccdbb5f78f Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com> Reviewed-on: https://review.coreboot.org/14541 Tested-by: build bot (Jenkins) Tested-by: Raptor Engineering Automated Test Stand <noreply@raptorengineeringinc.com> Reviewed-by: Martin Roth <martinroth@google.com> See https://review.coreboot.org/14541 for details. -gerrit