Tuesday, August 30th 2016

Intel Core i7-7700K "Kaby Lake" SANDRA Scores Surface

Someone with access to a Core i7-7700K "Kaby Lake" processor and an ASRock Z270-Extreme4 motherboard put the chip through SiSoft SANDRA 2015 CPU tests. Engineering sample or not, the clock speeds of the chip appear to check out with those of the lineup as we know it. The core ticks at 4.20 GHz, with a maximum Turbo Boost frequency of 4.50 GHz. You also get 8 MB of L3 cache, and HyperThreading. The benchmark confirms that Intel is working on a new platform refresh chipset, with the Z270 chipset succeeding the existing Z170. Existing LGA1151 could support the new chips, with BIOS updates.

At its stock speeds, the i7-7700K churns out a SANDRA 2015 "Processor Arithmetic" score of 151.94 GOPS. Its "Processor Multimedia" score yielded is 379.8 Mpix/s. To put things in perspective, a Core i7-6700K "Skylake" processor running at its stock speed of 4.00 GHz core with 4.20 GHz Turbo Boost typically yields 140.88 GOPS in "Processor Arithmetic" and 353.8 Mpix/s in "Processor Multimedia" tests, according to LegitReviews. Intel is expected to launch the 7th generation Core processor family, alongside the 200 series chipset, later this year. Kaby Lake is Intel's third CPU micro-architecture for the 14 nm process, after "Skylake" and "Broadwell."
Source: Reddit
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57 Comments on Intel Core i7-7700K "Kaby Lake" SANDRA Scores Surface

#51
BiggieShady
Getting 200 to 400 MHz extra in the same thermal/power envelope is by no means bad ... Kaby Lake is what it is, an incentive for AMD to clock dat zen :rockout:
Posted on Reply
#52
Evans Young
Is this really true??? Haven't anyone read recently that intel's kabby lake i7 7700k cpu is clocked at 3.6ghz with turbo boost up to 4.2ghz??? And that it'll be backward compatible with the existing z170 chipset and the 1151 socket???
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#53
Prima.Vera
BlueFalcon...The most logical upgrade for those who skipped Skylake is the next true architecture with Ice Lake or at minimum Skylake-X on 2066.
With the current "progress" on CPU performance, that date might not even sound as irony ;)
Posted on Reply
#54
MxPhenom 216
ASIC Engineer
Evans YoungIs this really true??? Haven't anyone read recently that intel's kabby lake i7 7700k cpu is clocked at 3.6ghz with turbo boost up to 4.2ghz??? And that it'll be backward compatible with the existing z170 chipset and the 1151 socket???
Why dont you post a link for us to see???????
Posted on Reply
#55
Brusfantomet
BlueFalconYou are both incorrect. You are using the term IPC synonymously with per core performance increase. That's not what the term means:

"instructions per cycle (IPC) is one aspect of a processor's performance: the average number of instructions executed for each clock cycle."

That means the only way to measure IPC of Kaby Lake against Skylake is at the same CPU frequency. Since Kaby Lake is simply made on a new 14nm+ node, but the underlying CPU architecture is 100% identical (GPU improvements are irrelevant here unless measuring 4K encoding/decoding acceleration), the IPC of Kaby Lake and Skylake will be identical at the same clocks. AnandTech confirms:
yeah, IPC is ideally measured at the same Hz, but since the two were reportedly NOT on the same frequency
btarunrCore i7-7700K "Kaby Lake"... The core ticks at 4.20 GHz, with a maximum Turbo Boost frequency of 4.50 GHz.
...
To put things in perspective, a Core i7-6700K "Skylake" processor running at its stock speed of 4.00 GHz core with 4.20 GHz Turbo Boost
the 7700k has a 5 % clock speed advantage(0,2 Ghz / 4 GHz = 0,05 = 5%, therefore dividing the performance advantage with 1.05 gives a (assumed linear scaling based on clock speed) approximation of the 7700k at 4 GHz.
Posted on Reply
#56
D007
See no reason to upgrade from my 4770k still. 4.6 ghz OC'd.. It's a good thing..
Posted on Reply
#57
Riza Guntur Prakoso
Given that some motherboard manufactures ( Asus *cough* ) can even override multicore speed for 1, 2, 3 or 4 cores usage patterns, I can't even see it as viable upgrades since the features is already there
Even the IPC is in the margin of error. Maybe they even test it with DDR4 4266Mhz to get the IPC there.
Who knows
I buy now because from what I see, the prices will increase once more for no reason
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