Sandybridge to Haswell vs Haswell to Skylake. Greater Improvement?

[arandomguy]

Which was the greater transition?

Sandybridge to Haswell
or
Haswell to Skylake

Comparing the desktop platform with i7s for performance.

Interested in data and arguments for either case.

 

[TheELF]

Why would one care?
If you have a system that has enough power for you than it has enough power if not then upgrade.

 

[frozentundra123456]

At stock, SB to HW shows about 15%ipc gains, plus higher clockspeed. HW to SL is around 10% gain in ipc, with very similar clocks. There are some corner case games where SL shows big improvements with fast ram, but these gains are the typical ones.

 

[Keljian]

Depends on your workload.

AVX2 is probably the biggest advance between Sandybridge and Haswell. For string transformations or floating point math this is big - which is pretty big for most data work. (80% jump in speed)

Multiplication is another big one, FMA3 came in with Haswell.

Broadwell had a 40% increase in floating point multiply speed (over Haswell).

Skylake improves on the above incrementally obviously, but I don't see much that is as big a leap.

I guess I'm saying the big leap from Sandybridge to Skylake was Haswell. Followed by Broadwell (TSX, ADX, Multiply)

 

[StrangerGuy]

In terms of IPC and energy efficiency improvements, SB->Haswell win hands down. Outside of the nasty TIM, Ivy was really good for a tick.

 

[Yuriman]

At stock, SB to HW shows about 15%ipc gains, plus higher clockspeed. HW to SL is around 10% gain in ipc, with very similar clocks. There are some corner case games where SL shows big improvements with fast ram, but these gains are the typical ones.

However, when overclocked, SB -> HW showed a regression in clockspeed, whereas HW -> SL shows the opposite. I'd say on your average chip, taking max overclock into account, it's probably similar in most workloads.

 

[Racan]

Haswell was a better improvement for applications, Skylake for games.

from hardware.fr

 

[dazelord]

Haswell was a better improvement for applications, Skylake for games.

from hardware.fr

5 generations of cpus, 32nm to 14nm. It's kind of sad when you think about it

 

[Heatshiver]

Some of those benchmarks make me sad

 

[Keljian]

What all that says to me is Broadwell is by far the chip to get ?