Can motherboards not support Xeon?

Question

Iron

I have a Biostar T77 board based on the H77 chipset.
biostar-russia.ru/mb/introduction.php-S_ID=595.html#cpu
It currently has an i5-2500(without K), and I want to change it to at least an i7-2600 or even better to an i7- 3770. But I'm concerned about two things - price and compatibility. These processors can be taken from hands on Avito for 5-6k or from 7.5k, respectively, or from Ali for 4k or 6k, respectively.
However, both of these processors have analogues in the form of Xeon 1270 without a video core. The same 1270v1, which is an analogue of the i7-2600, can be taken from hands for 3.9k, and with Ali in general for 2.7k.

The answer seems to be simple - take it, but here the question of compatibility arises.
For my board, this Xeon (and indeed any Zion) is not listed as compatible, however, for older versions of Biostar boards based on the Z77 chipset, support for some Xeons like 1245 or 1230v2 is indicated (but Orthodox 1270 is not listed).
Example biostar-russia.ru/mb/introduction.php-S_ID=580.html#cpu

Actually a question. Could it be that the motherboard supports all 2nd and 3rd generation processors but doesn't support Xeon?

PS Maybe I'm just paranoid in this regard, but I wouldn't want to take a processor that you can't run :(
PSS Zions are not officially supported on a friend's board, but the same 1270 started up without problems, oddly enough.

Answer 1

There are plates like this
And vice versa, starting from the motherboard
https://www.pc-specs.com/mobo/Biostar/Biostar_T77_...

Answer 2

even if the board supports the processor, but there is no support in the BIOS, you will not get anything.
as an example, hp Z X20 has a revision with v1 and v2 bootblock
Accordingly, v1 for xeon v1
The most interesting thing is that you can solder the BIOS and flash it with a programmer, then the board will begin to understand.
In general, search the forums specifically for the name of your board and processor.