And no, single 2660 with only Hynix 4Gb does not work either. However I had just purchased an H810, and merely by removing the H710 and using the 810 with an MD1220, I get full boot with all 160 Gb RAM and both 2660s installed.
Hi, all Dell docs say the R620 is compatible with Xeon E5-2660v2 processors, so I updated Bios and PERC H710 mini firmwares to latest, then installed the processors. However, it insists on System Halt- PCIE Training Error: Raid controller if the H710 is installed. If I take the H710 out, it boots fine, can go into Bios settings etc. with no problem. System is also fine with the stock cpus plus H710, so I'm stumped.  Any advice? Thanks! Scott
R620 PCIE training error with E5-2660v2