Area-51 R5, CPUs, hardware corner

R5 specifications 

Intel X series Processors 

I would not bother with it because current generation CPU's are going to be cheaper and perform better.

The rest of the platform is also outdated.

so can it handle? i9-10980XE

I would like to just know if its just true and if so why id like to just learn more.

It supports the core X-series and the 4 models are listed on the Intel link

Be aware these are core x-series CPU's. So a 10900X is supported, which is not the same as a 10900F that is not supported.

That is a 10th generation. The latest bios update supports:  This update supports the following processors: Intel Core i7-9800X, Intel Core i9-9820X, Intel Core i9-9900X, Intel Core i9-9920X, Intel Core i9-9940X, Intel Core i9-9960X, X-series Processor Intel Core i9-9980XE Extreme Edition Processor (Skylake-X core series)

I don't think Dell has ever included BIOS support for 10th generation. (Cascade Lake-X core series)

While the chipset and the socket match, it requires BIOS support.

Dell validated Area-51 R5 OEM Intel Skylake-X CPU using our OEM Intel X299 PCH chipset =

NRPY0 i9-9980XE 3.00GHz
D6D1J i9-9960X 3.10GHz
PKP18 i9-9940X 3.30GHz
XWTJ8 i9-9920X 3.50GHz
K4FDV i9-9900X 3.50Ghz
14YJ3 i9-9820X 3.30GHz
91YJ0 i9-7980XE 2.60GHz
20MGX i9-7960X 2.80GHz
69DC2 i9-7940X 3.10GHz
JWVJF i9-7920X 2.90GHz
R06C6 i9-7900X 3.30GHz
33CDW i7-9800X 3.80Ghz
N42VP i7-7820X 3.60GHz
6XRPW i7-7800X 3.50GHz
GKX5M i7-7800X 3.50GHz