New 15' rMBP's iGPU is much better than Iris 6100?

[cozy1234]

I bought rMBP 13' 2015 but It had something problem on GPU performance
I mean this 'https://forums.macrumors.com/threads/1857649/'
So I'm going to buy this 15' rMBP 2015.
A lot of guys want to skylake but I think haswell is fine too.

But Iris pro 5200 is much better than Iris 6100?
Can it solve my problem?

And please say your opinions of 15' rMBP which is $1,999.00

Thanks for your opinion
and Thanks for reading (I'm not good at english)

 

[T5BRICK]

But Iris pro 5200 is much better than Iris 6100?

Yes, it's better than the 6100.

Can it solve my problem?

Some folks are reporting UI lag even with the GT 750m, so, maybe.

 

[leman]

Some 13" models are reported to have GPU performance issues. So far, its not clear what causes these. A 15" may or may not exhibit these issues. But you can also try out a different 13", there is a good chance that it will work better.

 

[cookies!]

Do note that much older integrated GPU chipsets are perfectly capable of running Yosemite UI with full transparency. The only reason there is lag is because of poor coding/drivers/support from both Intel and Apple (and mostly Apple, probably), not because of hardware limitations. With that said, I've found that UI lag never happens on dGPUs from the past few years unless I'm absolutely hammering the CPU.