The Intel Core i5-7600K (91W) Review: The More Amenable Mainstream Performer
by Ian Cutress on January 3, 2017 12:01 PM ESTProfessional Performance: Windows
Agisoft Photoscan – 2D to 3D Image Manipulation: link
Agisoft Photoscan creates 3D models from 2D images, a process which is very computationally expensive. The algorithm is split into four distinct phases, and different phases of the model reconstruction require either fast memory, fast IPC, more cores, or even OpenCL compute devices to hand. Agisoft supplied us with a special version of the software to script the process, where we take 50 images of a stately home and convert it into a medium quality model. This benchmark typically takes around 15-20 minutes on a high end PC on the CPU alone, with GPUs reducing the time.
Here we report the overall time to complete the test – sub-test results can be found in Bench.
The Core i5-7600K does well in the sub-tests that are more IPC dependent, but there are more sub-tests that revolve around threads and frequency and pure single-core grunt. As a result the i5-7600K pretty much matches the i5-6600K for performance.
Cinebench R15
Cinebench is a benchmark based around Cinema 4D, and is fairly well known among enthusiasts for stressing the CPU for a provided workload. Results are given as a score, where higher is better.
All the Kaby Lake processors seem to do well in CB15 single threaded performance, given that all the K-processors can reach 4.2 GHz or higher one way or another. This puts the i5-7600K on par with Devil’s Canyon when we factor in the IPC change as well.
Common consensus is that CB15 scales with threads, however the Core i5-7600K sits above the Core i7-2600K thanks to frequency and IPC gains over the years.
HandBrake v0.9.9: link
For HandBrake, we take two videos (a 2h20 640x266 DVD rip and a 10min double UHD 3840x4320 animation short) and convert them to x264 format in an MP4 container. Results are given in terms of the frames per second processed, and HandBrake uses as many threads as possible.
Both the HandBrake tests essentially mirror what we saw in CB15 – the Core i5-7600K is there or thereabouts when frequency is the main factor, and when we stick a register-heavy threaded situation in the path, the effect from not having hyperthreading compared to the Core i7-7700K is relatively muted – in this case the i7 is only +20% performance over the i5, despite costing nearly 50% more.
Hybrid x265
Hybrid is a new benchmark, where we take a 4K 1500 frame video and convert it into an x265 format without audio. Results are given in frames per second.
Our Hybrid test is somewhat similar to the HandBrake HQ test, showing the fact that heavy threads reduce the efficacy of hyperthreads.
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Chaitanya - Tuesday, January 3, 2017 - link
Probably the most useless upgrade in recent years for PC users.Sabresiberian - Tuesday, January 3, 2017 - link
1) This is only an optimization of an existing architecture, and2) Anyone knowledgeable will almost always recommend skipping at least one architectural generation and, especially considering the slow improvements over the last 5 years, at least 2 generations. Which means if you are in a use-case scenario that can take advantage of the increased CPU performance you shouldn't be thinking "upgrade" unless you are running Sandy Bridge or earlier.
(The obvious exception that breaks the rule here is Zen, which will offer a huge performance increase over Bulldozer.)
Shadow7037932 - Wednesday, January 4, 2017 - link
>(The obvious exception that breaks the rule here is Zen, which will offer a huge performance increase over Bulldozer.)How about we wait until it's actually released? Remember what happened with the original Phenom?
silverblue - Wednesday, January 4, 2017 - link
I don't think it's unreasonable to get excited about Zen, at least in terms of AMD's current product lines. Potentially massively optimised benchmarks aside, at least they tested Ryzen engineering samples against Intel's more expensive offerings in public without resorting to slides containing unsubstantiated performance claims. In fact, the only thing I can see in print is the "40% faster than Excavator" claim. If the Canard PC leaks aren't fake, there's every chance that AMD have achieved this, and possibly exceeded it.You mentioned Phenom, so let's take a trip down memory lane:
Phenom: "40% faster than Core 2 Quad at the same clock speed"
Reality: Up to 40% slower per clock after the TLB bug; needed Phenom II to really close the gap.
Bulldozer: "50% faster than the i7 950"
Reality: In what test? Even the 8350 couldn't boast this.
I don't see Ryzen being the gaming top dog - remember, current productivity and gaming demos have been against slower clocked CPUs with double the cores of your garden variety, highly clocked i5 and i7 - but I don't think it's unreasonable to expect that it'll bury the FX series. IMHO, of course.
boozed - Friday, January 6, 2017 - link
I think the problem is that if Skylake wasn't enough of a performance improvement to upgrade, neither is Kaby Lake.Murloc - Tuesday, January 3, 2017 - link
is it?I'm running a nehalem, if I was upgrading now I'd appreciate the lower power consumption and the HEVC hardware support.
willis936 - Wednesday, January 4, 2017 - link
Was HEVC hardware not present on the 6x00 series?Shadow7037932 - Wednesday, January 4, 2017 - link
He said Nehalem, which is the i7 920 and the like.close - Wednesday, January 4, 2017 - link
@Shadow7037932, can you name one good reason why he should update his Nehalem to a Kaby Lake K part that didn't exist one and a half years ago with Skylake?I'll put it another way: If someone passed on a Skylake upgrade last year why exactly would they pay the same price to get a pre-overclocked Skylake (aka Kaby Lake) this year? Why did the user suffer through an extra ~18 months of really aging hardware just to buy what's basically the same CPU at the same price today?
Since these 2 generations share architecture and fabrication process there's no reason to expect consistently better OC on the 7 series. So the 300MHz should be within reach for any K part and any user.
MonkeyPaw - Tuesday, January 3, 2017 - link
Looks like it is the best 14nm Intel architecture you can buy. Still, it seems like if you're in the market now, you might as well wait to see if Ryzen will be a compelling option. If nothing else it might help drive some of these prices down.