Hello!

I want to update the system unit - the computer Dell Vostro V 3900 Mini-Tower.
This computer has the following characteristics(or should I say limitations, by that I mean the motherboard):
Processor:
Number of cores 2 (max 2)
Number of threads 4 (max 4)
Manufacturer GenuineIntel
Name Intel Core i3 4150
Codename Haswell
Specification Intel(R) Core(TM) i3-4150 CPU @ 3.50GHz
Package (platform ID) Socket 1150 LGA (0x1)
CPUID 6.C.3
Extended CPUID 6.3C
Core Stepping C0
Technology 22 nm
TDP Limit 54.0 Watts
BIOS
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UEFI Yes
BIOS Vendor American Megatrends Inc.

Chipset
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Northbridge Intel Haswell rev. 06
Southbridge Intel H81 rev. C2
Bus Specification PCI-Express 2.0 (5.0 GT/s)
Graphic Interface PCI-Express 2.0
PCI-E Link Width x16 (max 16x)
PCI-E Link Speed 5.0 GT/s (max 5.0 GT/s)
Memory Type DDR3

DMI Baseboard (Motherboard)
vendor Dell Inc.
model 0T1D10
revision A01

I want to install in this motherboard the most powerful processor which I can put here: will Intel Core i7-4790 fit in here? As I understood I should search for only those Core i7 processors which start with 4 in their name because initially there Core i3-4150 was installed from the factory.
Then I want to put the most powerful graphic card which I can put here(even if it will be outside the case, I think it is possible to connect the card just using extension cables?)(Is it possible to put 1080Ti or analogue from AMD or something more powerful?)
Then I think it is needed to change the power supply, the computer has a 300W power supply, 80Plus Bronze (does not know what it is though). Or will it be still enough?
Then I want to add RAM, as Core i7 supports 32 GB of RAM, but there are only two RAM slots on this motherboard and I think that I should buy 2 modules each of them should be 16 GB. But I am confused by the fact that there are almost no mentions on the internet that people install 2 modules of DDR3 memory each of them by 16 GB.
Then I want to add the fastest SSD with a volume of 2 Terabytes(can I put here M.2 SSD? somehow, using PCI-express adapter), the motherboard has two SATA 3 ports and two SATA 2 ports.
Then I want to add an HDD of 2 Terabytes with a spin speed of 5200, as I think they are more reliable than those with the spin speed of 7200, to make back-ups of SSD.
I think I listed all the parts to upgrade to make it the fastest computer based on this motherboard.

I want you to advise me.
Thank you in advance.