He would get a substantial increase in performance. A 2500k won't bottleneck a 480, but the increase in CPU performance and the uplift from a newer architecture would be pretty noticeable. The gains won't come from the GPU, it would be all CPU. But since he doesn't have the money, there's no harm in not upgrading.
I think you misunderstood dude. When Skylake was tested VS Sandybridge it was up to 30% faster in some scenarios. However, it was then deciphered that the reason it was so much faster was because of the speed of the RAM. Stick 2133 ram into a Sandy and that gap closed to 15% absolute tops.
Now given Kaby is no faster than Skylake IPC/clock per clock then it could well be that the hairy mouth breather has used 1600mhz DDR3 in the test rig. I studied the article about as well as I could and he made no mention to ram speed whatsoever.
In other words that article makes Kaby look a lot better than it actually is. Sound familiar?
Ivy comes out - people complain it's only up to 5% faster than Sandy.
Haswell comes out, people complain it's only about 8% faster than Sandy.
DC comes out - people complain that it's no faster than Haswell it just clocks a tiny bit better, but nowhere near the 5ghz Intel promised.
Skylake comes out *yawn*.
Then Kaby comes along right before AMD are about to release Zen and all of a sudden this "tick" is amazing, does 5ghz, pees all over Sandy etc etc.
No dude, just, no. Honestly there's an article in a magazine that just makes me want to spew. Going on and on about how incredible it is that you can actually run an actual CPU at 5ghz. Completely dismissing the fact that I did that with a £105 CPU about three years ago.
Now look, I am not saying Intel have coerced any one into actually writing these articles. They don't need to. Intel treat you right *if* you treat them right. So yeah, let's just say there is an awful lot of back scratching going on between them and their vendors and reviewers etc. Another example, Custom PC (the mag I read) constantly shows pictures of Intel ES and even sometimes in reviews they show the ES version rather than the retail version. They're probably doing it to show off, or, because they get it all for free.
I'm not saying Kaby is bad I just want to know why all of a sudden Kaby does what they promised with Devil's Canyon (5ghz) and is the same IPC as Skylake (so just as disppointing in the % increase over last gen) yet all of a sudden it's awesome, not just another tick.
IMO Intel are trying to make all of the sales they can with their CPUs at the prices they have them at now because they know Ryzen is coming. The only part of the hairy mouth breather article I agreed on was right at the end where he said wait for Ryzen before you make a decision.
However, at that point in time any one who doesn't really like AMD and wouldn't buy them no matter how cheap they were had already made up their mind.
EDIT.
Well apparently he has used 2400mhz ram. I really didn't want to read the entire article.
I would like to know how Kaby is so much better than Skylake, then.
http://www.eurogamer.net/articles/d...it-finally-time-to-upgrade-your-core-i5-2500k
If you look at their benchmarks the lowest FPS they got was with Witcher 3 and that was 86.4 FPS. They also mention that the perfect pairing for a CPU such as the 2500k is a 970 which is pretty much level with a 480 really.
So I don't see any reason there to upgrade to Kaby, especially with that GPU.