Skylake Clockspeeds and benchmarks!

sanaxe1 · 24 Apr 2015 at 11:46

Dave2150 said:
Some more cinebench based comparisons:

Core i7 6700K is:
30,5% faster than Core i7 4770K.
38,4% faster than Core i7 3770K.
50,85% faster than Core i7 2700K.
86% faster than Core i7 965.

All at stock of course. We really need to see overclock information to fully compare though, since many of these older CPU's could overclock so well.

On a Clock for Clock basis . Ie all CPU's at 3.5ghz the I7 6700k is only 23% faster than the i7 965x.

10% of 5.66 = 0.56 + 5.66 = 6.22. 6.22 to 8.07 = 23% difference.

Skylake does use 50% less power than the 965x which if you used the CPU at 100% for 6 hours a day for 365 days, it would save you £22.68. So hardly a big drop in Electricity costs and the performance difference isn't that big either.

Dave2150 · 24 Apr 2015 at 12:47

sanaxe1 said:
On a Clock for Clock basis . Ie all CPU's at 3.5ghz the I7 6700k is only 23% faster than the i7 965x.

10% of 5.66 = 0.56 + 5.66 = 6.22. 6.22 to 8.07 = 23% difference.

Skylake does use 50% less power than the 965x which if you used the CPU at 100% for 6 hours a day for 365 days, it would save you £22.68. So hardly a big drop in Electricity costs and the performance difference isn't that big either.

The graph I linked was comparing the CPU's at stock - as mentioned in the post.

If you lower the 6700K to 3.5Ghz then yes the performance won't be large compared to if it was running at it's normal speed.

The million dollar question is how well will the 6700k overclock. I'm guessing they'll do at least 4.6Ghz, which with the 15-20% IPC increase over Haswell, will make for a very fast CPU.

Armageus · 24 Apr 2015 at 13:00

Dave2150 said:

abui1806 said:
well the cinebench R15 benchmark looks suspicious to me. How come a quad core i7 4790K performs just very very little behind a hexa core i7 5820k. hum?

Based on results, looks more like cinebench R11.5 than R15 - but the comparison results seem legit e.g. with:

http://www.bit-tech.net/hardware/2014/06/19/intel-core-i7-4790k-devil-s-canyon-review/6

http://www.guru3d.com/articles_pages/core_i7_5960x_5930k_and_5820k_processor_review,10.html

Orangey · 24 Apr 2015 at 13:45

Single threaded 11.5

http://www.anandtech.com/bench/CPU/344

wunkley · 24 Apr 2015 at 14:57

Quick question. If you were going to do a new totally separate build just for gaming in a few months time, what motherboard/ CPU would you go for? I'm swinging towards skylake with the new info, but had thoughts of a 6 core x99 route.

The build will go with one at first and then probably two 980Tis, or Titan X depending on 980Ti specs.

Budget will be fairly large by the way, but I am from Yorkshire so always like good value (ie I can be tight). More interested in the best route to take for performance now, and longevity.
My current system is a 2600k based z68, which I use for gaming and work, and as we all know the sandy bridge 2600k is something of a classic. I plan to just use my current set up for work only (photo and video editing) and go for a separate all out supercharged new build for gaming only. Basically I want my new gaming build to be as good and long lived as my current 2600k one was/ is.

Armageus · 24 Apr 2015 at 15:26

wunkley said:
I'm swinging towards skylake with the new info, but had thoughts of a 6 core x99 route.

wunkley said:
I plan to just use my current set up for work only (photo and video editing) and go for a separate all out supercharged new build for gaming only.

X99 may see another processor generation, whereas socket 1151 that skylake uses is almost certain to see another processor generation i.e. whatever comes after skylake - hence possibly more longevity.

The X99 route would make more sense if you were using it for work as well, where six core processors and possibility for more memory could benefit your Photo Editing. Otherwise X99 probably will only make sense if you are looking at 2 or more Graphics cards, due to more PCI-E Lanes.

wunkley · 24 Apr 2015 at 15:32

Armageus said:
X99 may see another processor generation, whereas socket 1151 that skylake uses is almost certain to see another processor generation i.e. whatever comes after skylake - hence possibly more longevity.

The X99 route would make more sense if you were using it for work as well, where six core processors and possibility for more memory could benefit your Photo Editing. Otherwise X99 probably will only make sense if you are looking at 2 or more Graphics cards, due to more PCI-E Lanes.

Thanks fella. I'm perfectly happy with the performance of my current build for photo and video editing (2600k at 4.5Ghz, 16Gb ram) so I'm happy to stick with it as my dedicated work comp.

I've decided I really need and want 2 totally separate systems, one for work and one for play. PC gaming is my hobby, so I'd like to throw the cash at a new build specifically for gaming.
Upgrading motherboards and processors is not something I like or want to do often though, which is why my current build has been so good for me.

I think Skylake is probably the best route to go for me, I assume that hex core, and more(?), chips will come out after the initial quad cores, so I can always just upgrade the processor if need be.

The upshot is I have to build one totally new system, I just need to know what to base it on.

mattmos · 24 Apr 2015 at 16:09

Wasn't Skylake originally supposed to have pci-e 4.0? Anyone know if that's appearing any time soon?

Armageus · 24 Apr 2015 at 16:30

mattmos said:
Wasn't Skylake originally supposed to have pci-e 4.0? Anyone know if that's appearing any time soon?

https://www.pcisig.com/news_room/faqs/FAQ_PCI_Express_4.0/ said:
Q: When will PCIe 4.0 be released?
A: The final PCIe 4.0 specifications, including form factor specification updates, are expected to be available in late 2016. The timing of the specification maturity is a function of the participation and contributions of PCI-SIG members as the technical workgroups consider and debate technology choices, capabilities and analyses.

HazardO · 24 Apr 2015 at 16:35

Nevermind

mattmos · 24 Apr 2015 at 17:02

Cheers! Shame it slipped from some of the intel roadmap slides I've seen dotted around.

Orangey · 24 Apr 2015 at 17:02

PCIe 4 another broken promise

So now we get to choose between two overpriced underperforming disappointments that will be obsolete in a year. Magic!

Freddie1980 · 24 Apr 2015 at 17:04

mattmos said:
Wasn't Skylake originally supposed to have pci-e 4.0? Anyone know if that's appearing any time soon?

Skylake-E most likely will see the PCI-E 4.0 spec.

Telecaster · 24 Apr 2015 at 17:38

Do we even have anything that takes full advantage of PCIe 3? Is PCIe 4 a real deal breaker?

Meladath · 24 Apr 2015 at 19:34

Looks like another skip. Intel haven't done a thing since sandy bridge that I care about, other than replacing the soldered IHS with toothpaste to save a few pennies and make temps far worse. Wish I never "upgraded" to a 4670K from my 2500K, what a complete waste of time and money.
This looks to be more of the same as every other gen has. I really hope zen comes and kicks intel in the rear so they start doing things again, otherwise I may never buy another CPU.

Oooh it has slightly higher numbers in cinebench yet performs exactly the same in every game! Look at me crawling my way to the counter to buy one! /sarchasm

snips86x · 24 Apr 2015 at 19:38

Seems hardly worth the upgrade from a 4790k! Would also be nice to see Sandy included into the benches too!

Boomstick777 · 24 Apr 2015 at 20:43

snips86x said:
Seems hardly worth the upgrade from a 4790k! Would also be nice to see Sandy included into the benches too!

Agreed, it's just more of the same since Sandy. Tiny increase in performance etc..

One chip has peaked my interest though, the Intel Core i7-6700T, it's 2.8Ghz > 3.6Ghz with 8MB Cache and HT, in a 35W TDP.

That might be ideal for Mini ITX with some DDR3L or DDR4. I want something that runs a lot cooler than my 4770K but gives similar performance.

Broadwell might offer something similar though, so hopefully can grab that instead. Don't really want to change my mobo / memory for Skylake. Just doesn't seem worth it.

smilertoo · 24 Apr 2015 at 20:49

They seem to have given up on power reductions in order to have better iGP, something only a minority of users ever use. Does the cpu power down the iGP if it's not being used or is that power just wasted going nowhere?

arcon33 · 25 Apr 2015 at 08:22

When exactly will skylake be released? I've heard anything from this summer to early 2016, and I don't mean a product launch I mean when can I actually click on buy now and have a small sex wee in my pants lol

Supernova · 25 Apr 2015 at 08:44

arcon33 said:
When exactly will skylake be released? I've heard anything from this summer to early 2016, and I don't mean a product launch I mean when can I actually click on buy now and have a small sex wee in my pants lol

Haha I want to know that too. It seems like it's close, but I'm ready to be brought back down to earth when someone says December '15 or something.