Finally I acquired another 6276 CPU (it was the fastest and cheapest option).
It works perfect. If I can try (in the future) another different 16-core CPU, I will report the result. Thank you for you kind support. Regards, - Eli On 11/04/18 21:30, Timothy Pearson wrote: > This may be a general coreboot limitation at the moment. The > compatibility sections for mixed CPUs in the BKDG are more concerned > with total power delivery and proper P-state setup than anything else. > > If I recall correctly, coreboot assumes both CPUs have the same core > count when setting up APICs and such. There are a number of places that > would need to be modified to remove this assumption; it's a leftover > from the original K8 code and would take some significant work to fix. > This also needs to be verified as I am going from memory here from a > couple of years ago. > > On 04/11/2018 02:12 PM, Elisenda Cuadros wrote: > > Thank you for your reply Timothy. > > > Vendor Bios doesn't print any special message regarding this. > > > In fact it shows a total of 28 cores (16+12). > > > I thought mixing CPUs from same families was supported. > > > Regards, > > > - Eli > > > On 11/04/18 20:44, Timothy Pearson wrote: > >> I don't know if coreboot has support for differing CPUs in the same > >> mainboard; it's not something I can recall testing at any point. > >> > >> The failure is occurring far before memory initialization, in CAR, in > >> core setup. I'd guess it has something to do with the two CPUs you > have > >> installed having different core counts. > >> > >> Does the vendor BIOS print a message about the core count being limited > >> on one of the CPUs for compatibility reasons? > >> > >> On 04/11/2018 12:57 PM, Elisenda Cuadros wrote: > >>> Hello, > >> > >>> After testing the board for some weeks I bought another CPU (6276). I > >>> installed this into CPU1 slot and a 6238 in CPU2. > >> > >>> I checked that both CPUs are shining and also the memory (Micron > >>> MT18JSF25672PDZ-1G4F1DD, populated in A2/C2/E2/G2 slots). > >> > >>> The problem is that Coreboot seems to hang at the beginning. I attach > >>> console.log. > >> > >>> I reinstalled all the devices twice, checked the vendor manual, > docs in > >>> coreboot.org, messages in mailing list, but I don't know what is > causing > >>> the problem. > >> > >>> Last test I've done is booting with vendor bios, and it boots without > >>> problem. > >> > >>> Any ideas? > >> > >>> Thank you for your help. > >> > >>> Regards, > >> > >>> - Eli > >> > >> > >> > >> > >> > >> > > > > >
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