What is better for a 1C server, one processor with 8 cores or two processors with 4 cores?

Question

1C

At the moment there is a server with a two-socket motherboard (Supermicro), but with one installed processor E5-2620 v2 (6/12) and 64GB of RAM. Itself 1C server on MSSQL.
It spins about 10 bd with a total mass so far in the region of 200GB. Basically works, but blunts. On average, the processor load is 30-50%.
As I understand it, 1C loves high frequencies and a fast disk subsystem very much. Because disks are already ssd, then I want to add 64 GB of memory and, because. EveyBridges are now cheaper than dirt, then change the processor to something 3.5-4 GHz.
And the actual dilemma is to buy two E5-2637 v2 (4/8) and 8 processors with 8 GB of memory or one E5-2667 v2 (8/16) and bother with selling the old memory and buying a new 8 by 16 GB.
What variant in my case is more preferable on productivity? And most importantly - why?

Answer 1

At equal frequency, one processor will work faster than two, because NUMA https://ru.wikipedia.org/wiki/Non-Uniform_Memory_Access
But in practice, the difference is small, something like 5%..10%.

Answer 2

What does blunt mean? during processing?
1s likes frequency and RAM (this is already MSSQL thanks)

Answer 3

It's unlikely to make a noticeable difference.
In general, before transferring the database to a new server, it is worth taking measurements and understanding what exactly performance depends on. For documents, most likely, this is the frequency of the processor, but with the formation of reports, everything is more difficult. There can be both a long query on the SQL side (and in this case the processor is unlikely to help), or a long processing of the query result on the 1C side (here there is already a direct dependence on frequency). Disks don't affect performance that much, btw.

Answer 4

https://ark.intel.com/content/www/ru/ru/ark/produc...
https://ark.intel.com/content/www/ru/ru/ark/produc...
У 2637 v2 base frequency is higher (3.5 vs 3.3). I would not look at the TurboBoost frequency here, it is unlikely that the server processor will work on it for a long time.