Finally I acquired another 6276 CPU (it was the fastest and cheapest
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.
On 11/04/18 21:30, Timothy Pearson wrote:
This may be a general coreboot limitation at 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
In fact it shows a total of 28 cores (16+12).
I thought mixing CPUs from same families was
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
> 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:
>> 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
>> I reinstalled all the devices twice, checked the vendor manual,
, messages in mailing list,
but I don't know what is
>> the problem.
>> Last test I've done is booting with vendor bios, and it boots without
>> Any ideas?
>> Thank you for your help.
>> - Eli