Which part/parts need upgrade? (bottleneck search)

Thanks for your answers! So next upgrade gpu! And what about ram is it enough? 8Gb? And would be GTX 1050 TI enough? Or i should really consider 1060?

I think i would go for 1050TI but i saw many versions of it in local online shop now.. with price ranging from 150EU to 200EU, which should i choose? What specs are important?

I will put there let's say cheapest one and some random more expensive specs:

CHEAPEST
Name - MSI GEFORCE GTX 1050 TI 4GT LP
Price: 160Eur
BUS PCI-E x16
CLOCK FREQUENCY RATE (ENGINE) MHz 1392 MHz
CLOCK FREQUENCY RATE (MEMORY) MHz 7.008 GHz
CONNECTIVITY DVI-D
CONNECTIVITY HDMI
CONNECTIVITY DisplayPort
COOLING FAN
CUDA Core 768
GRAPHICS CARD CHIPSET NVIDIA GeForce GTX 1050
LINK https://www.msi.com/Graphics-card/GeForce-GTX-1050-Ti-4GT-LP.html#hero-specification
MAX. RESOLUTION 7680 x 4320
MEMORY 4096 MB
MEMORY INTERFACE (BIT) 128
MEMORY TECHNOLOGY GDDR5
PACKAGE RETAIL
PRODUCT DESCRIPTION MSI GEFORCE GTX 1050 TI 4GT LP

Let's say random more expensive one:

Name - MSI GeForce GTX 1050 Ti 4GT OC
Price - 168Eur

BUS PCI-E x16
CLOCK FREQUENCY RATE (ENGINE) MHz 1455 MHz
CLOCK FREQUENCY RATE (MEMORY) MHz 7.008 GHz
CONNECTIVITY DVI-D
CONNECTIVITY DisplayPort
CONNECTIVITY HDMI
COOLING FAN
CUDA Core 768
GRAPHICS CARD CHIPSET NVIDIA GeForce GTX 1050 Ti
MAX. RESOLUTION 7680 x 4320
MEMORY 4096 MB
MEMORY INTERFACE (BIT) 128
MEMORY TECHNOLOGY GDDR5
PACKAGE RETAIL
PRODUCT DESCRIPTION MSI GeForce GTX 1050 Ti 4GT OC

And Let's say one more

Name - GeForce GTX 1050 Ti G1 Gaming 4G
Price - 182Eur
Maximum resolution 7680 x 4320 pixels
Processor frequency 1366 MHz
Processor boost clock speed 1480 MHz
Discrete graphics adapter memory 4 GB
Memory bus 128 bit
Memory clock speed 7008 MHz
Minimum system power supply 300 W
Power consumption (typical) 75 W
Depth 40 mm
Height 118 mm
Width 219 mm
Gross weight 1.00 kg
Net weight 0.60 kg
Graphics processor family NVIDIA
Graphics processor GeForce GTX 1050 Ti
CUDA Yes
Parallel processing technology support No
FireStream No
Graphics adapter memory type GDDR5
Interface type PCI Express 3.0
HDMI ports quantity 3
DVI-D ports quantity 1
DisplayPorts quantity 1
HDMI version 2.0b
DisplayPort version 1.4
TV tuner integrated No
PhysX Yes
DirectX version 12.0
Shader model version 5.0
OpenGL version 4.5
Full HD Yes
Dual Link DVI Yes
HDCP Yes
NVIDIA G-SYNC Yes
NVIDIA 3D Vision Yes
Cooling type Active
Form factor ATX
Number of slots 2
Colour of product Black, Orange
Supplementary power connectors 1x 6-pin
Windows operating systems supported Yes
Linux operating systems supported Yes
Producer product name GeForce GTX 1050 Ti G1 Gaming 4G

So there are like 50different options between 155-220Eur.. Is it worth paying more? Or i should just go for some of ~160Eur? Like one i posted first or second..

Okay that's clear. Now i have few more questions about these cards.. So first quiestion - Does brand name like - MSI , ASUS, GIGABYTE make any difference? Becouse now i have had this gigabyte gtx750 for long time and it worked perfectly..

Okay that's clear, and actually i am interested what is Low profile? How do i know which are those?

Oh okay all clear, so i am going for that MSI OC 1050TI in that case. Thanks. One more question about these cards:
Let's say now i am looking at my GTX750 package and it says on it MINIMUM Intel i7 3.2Ghz cpu is required. Mine is i5 as you can see above in my first post.. So won't my i5 cpu slow down that 1050TI?

Yes that's exact model

Thank you everybody for your help!

Well that's not really a problem because i would by it from retailer who sells different brands, as far as i know they just take product and take care about warranty.. Most of times you just get same model , just brand new..

Also how much is right price to ask for used geforce GTX 750 2Gb ? Any ideas?
This one - https://www.gigabyte.com/Graphics-Card/GV-N750OC-2GI#ov