Which gpu should i choose?

I really doubt it will bottleneck those GPUs, they are low end but powerful, so there should be no issues.

Your CPU may struggle on GTA 5 and a few other games, but as long as you turn settings down you should be perfectly fine to play them.

The 1050ti would be the better bet for when you upgrade your CPU. It would be best if you upgraded to something like the i5-6500, that would be one of the best matches for your GPU, and will last you quite a while.

Sorry, but this is very, very wrong information.

It will be a bottleneck to most games, and for some your performance will be as low as HALF of what you'd get pairing a a GTX1050Ti with a top-end Intel CPU.

They are low-end, but certainly not "powerful" so you need to educate yourself a bit more about CPU's before giving advice.

That's a dual-core, non-hyperthreaded CPU. It's about 85% as fast as a G3258 stock.

*It's not just the AVERAGE frame rate that can be a concern. A CPU like this is going to have significant LOW FPS scores causing stutters.

In Battlefield 1 (new game) the i3-6100 which is a much better CPU was getting HALF the frame rate at times compared to its own average FPS.

**In GTA 5, I'm forced to guess a bit since you won't likely find a dual-core listed (some games won't even run if only two CPU threads are detected). The i3-4130 is slightly faster per core and has hyperthreading as well.

A little detective work shows that this and other games are going to STUTTER though. Many MULTIPLAYER games require extra CPU processing aside from game rendering to handle the other client data.

ADVICE:
1) GTX1050Ti 4GB is a great card.
I would not drop below this if you can help it, and 4GB is a good idea.

2) G4400 is going to be a big bottleneck to many games. I'd upgrade it ASAP but I don't know your budget. You may want to investigate used parts and look into an i5-4590 or better.

At the very least, avoid installing CPU intensive games until you upgrade it.

xFearDom,
1) I did make a mistake about the "powerful" part then corrected it.

2) BF1 was just an example.

3) Nowhere do I tell him to "give up"; in fact, I suggested simply to avoid CPU intensive games until he upgrades his CPU.

4) Yes, you said "may struggle" but you also said there should be "no issues"; those two viewpoints are quite different. Basically you implied MINIMAL problems with a CPU being a bottleneck to a GTX1050Ti in most games and that simply is NOT the case.

5) I never implied you were stupid. Just misinformed, and providing misleading information.

I also attempted to QUALIFY the expected performance, in particular the fact of STUTTERS which showing an average FPS doesn't indicate.

So...
If I had to sum up your mistake it would be your FIRST SENTENCE which basically suggests very few games will have any CPU bottleneck. That's far from the case with a GTX1050Ti + G4400.

**Seriously though, I did nothing to belittle you so I think you've taken this as an insult for no good reason. All I said was that your information was wrong. If you'd worded it a bit different it would have been fine.

Sigh. per above.
(it gets better at the end if you read it through)

#1 - what you said is clear. However it's also wrong. A large number of games will have reduced performance with a GTX1050Ti relative to what say an i7-6700K would give.

If a different part produces better results then the replaced part was being a bottleneck. That's the very definition of a bottleneck.

#2 - that's your interpretation. I said you were wrong. Benchmarks prove you are wrong. Calling you "wrong" is not the same thing as calling you "stupid" and I'm sorry that you feel that way as that's certainly not my intent.

How would you SUGGEST I relay when I think information is wrong?

#3 - this part is pointless since I didn't comment on it, though I wouldn't agree since now he needs a new motherboard, DDR4 memory and needs to reinstall Windows (and possibly buy a new copy depending what version he has).

Thus his best budget solution is to go with a part that fits his system already. He should look up his CPU support list but probably the i5-4590 or similar is the best solution.

#4 - Well, I can see what your INTENT was now more clearly though it doesn't change the fact that a G4400 is rarely NOT a bottleneck to the GTX1050Ti. You aren't going to convince anyone with sufficient PC knowledge of that. Perhaps "rarely NOT" is too strong but it's certainly quite common.

(In fact the GPU is almost EXACTLY the same performance as a GTX680 which I had for four years and for which I also compiled a list of how much processing the CPU needed to provide for various games)

So..
I'm done with this and won't respond further. Sorry you felt insulted, and FYI understanding how CPU parts perform isn't easy. I have a computer background and do a lot of testing so I have a pretty clear idea of how this all works. Hopefully the OP gets some good information which depending on the budget may go like THIS:

#1 - upgrade to GTX1050Ti 4GB

#2 - upgrade CPU to i5-4590 or similar ASAP

#3 - avoid CPU intensive games in general

#4 - don't confuse AVERAGE FPS scores with a tendency to dip LOW which causes stutter. That's something a dual-core CPU is much more prone to do which can ruin the experience in some titles.

#5 - tweaking game settings goes a long, long way to a better experience however most tweaks are more graphics related. Some things, especially in many multi-player games MUST run on the CPU which brings us back to the last point.

G4400.
Yep, I made a mistake there and corrected. See, it's easy to do!

I agree on the i5-6500 (or better).

*PCPARTPICKER has a list of GTX1050Ti links. I found several between $135 and $160 but I wouldn't spend more.