That would be great! Much appreciated!
Sorry for the delay, but I ordered non-ECC memory and the server obviously did not boot.
Then there was a delay in the delivery of the ECC memory
Anyway, as it seems we have an identical configuration now (SuperMicro X9SCM-F, Intel Core I3 2120T, Hitachi Deskstar 7K4000, 8 GB RAM), I can only confirm the findings you already had.
I have ordered a SuperMicro X9SCM-F with an I3 2120T to deploy as Unraid.
I did not plan to use a cache drive, but I can temporary allocate one and do some tests if you think the Atom CPU is the bottleneck in the process. Will be some weeks though before I have time to proper install / test.