Do APUs bottleneck dedicated GPUs?

[fauji_101]

I want to build a PC for myself on a restricted budget within a month and obviously i won't be adding the latest GPUs. I have 2 options now. Either I can go with a R7 3700x and a really old and cheap GPU or I can go with a R7 4750G and add a better dedicated GPU later in both the cases. The performance would be better with just the 4750G would be better than the combo of 3600x and an old GPU like 710 (its one of the few cheap GPU i can add right now the other ones dont make sense at their prices nowadays). But what i dont know is which of the two processors would perform better with the dedicated GPU after the prices are down (I would most likely go with the 3050 TI or the 3060). Would the 4750G bottleneck the dedicated GPU? 

[Stahlmann]

The performance will be very similar. Most likely identical because they run with the same clock speeds and architecture.

 

As soon as you pop in the dGPU, the iGPU will just be disabled and won't affect the CPU in any way.

[jaslion]

Well in a month the next gen apu's launch that are better in every way so maybe just get those? Either way skip the gt710 option it is horrendous.

 

The 3700x and 4750g have basically identical cpu performance but the new 5700g far exceeds them with the 5600g being about equal even tho it has less cores.

[crystal6tak]

Go with the 4750g

 

The only difference I can tell between 4750g and 3700X is the bit more cache on the 3700x.

4750g L2: 4MB L3: 8MB / 3700x L2: 4MB L3: 32MB

Performance difference between the two is negligible.

[xAcid9]

Cache size is quite important for Ryzen.