Intel Skylake / Kaby Lake

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jpiniero

Lifer
Oct 1, 2010
15,172
5,707
136
That power consumption is pretty bad. 82 additional W compared to the 6950X on the video encoding. Plus the idle is pretty high although that could be the mobo.
 

coercitiv

Diamond Member
Jan 24, 2014
6,630
14,057
136
"Still, a stable 4.7GHz across 10 cores at 1.25V is an impressive feat"

Hexus quote.
And again, regarding the video posted earlier, "auto" voltage says nothing with respect to chip potential. It's a blank statement meant to entice people into thinking the chip is so good it overclocks without needing extra voltage, which is downright dishonest, because it means that either BIOS pumps up voltage by itself, or the chip comes configured with greater than needed voltage guard band, or... the chip isn't really stable except for running CB 15 in short sessions.

The overclock figures on the other hand are very nice, as I said.
 
Reactions: Drazick

R0H1T

Platinum Member
Jan 12, 2013
2,582
162
106
Great to see that the OC headroom is as great as expected, unlike those initial BS rumors.

Looking forward to 6c/12t Coffee Lake!
Could just be a golden sample, unless you're telling me every Broadwell/Skylake/Kabylake OC's to 5GHz on air, like all those previews err(ly) leaks showed? There's also the temps & power consumption to take into account.
 

tamz_msc

Diamond Member
Jan 5, 2017
3,865
3,729
136

twothreefive

Junior Member
Jun 13, 2017
12
5
36
Looking at the gaming results, which is more sensitive to memory than most other consumer applications, the reduced L3 might be a problem.


I was thinking the same thing. Perhaps its due to the new chipset and the need for some updates but a little disappointing in the comparison performance with the i7 6950x.
 

R0H1T

Platinum Member
Jan 12, 2013
2,582
162
106
Another one:
https://www.bit-tech.net/hardware/2017/06/16/intel-core-i9-7900x-and-x299-chipset-revie/1

Comparing the OC results (4,4GHZ BW vs 4,6GHz Skylake-x), the average IPC seems to be a bit behind Broadwell. Consumes a lot of power, but overcloks well in return.
Tbh could just be some early BIOS issues (remember the ones who panned Ryzen for it?) or lower L3 size, perhaps even the mesh interconnect.

Who cares about that, apparently when it comes to OC all that talk of Intel's legendary efficiency goes out of the window, funny since the 1700 smokes every other 8 core out there in that regard.
 

Zucker2k

Golden Member
Feb 15, 2006
1,810
1,159
136
The power consumption is actually in the ballpark. If you consider extra ram and other penalties, it's actually equal or better to Ryzen in the video encoding benchmark for work done.
 
Reactions: Phynaz and Sweepr

TheF34RChannel

Senior member
May 18, 2017
786
309
136
The overclock itself is good news, but the "auto" voltage setting is not necessarily a positive thing.

I'm terrified of 'auto', in this case (see quote below) it worked out fine but the other 99%...not so much.

"Still, a stable 4.7GHz across 10 cores at 1.25V is an impressive feat"

Hexus quote.

Great to see that the OC headroom is as great as expected, unlike those initial BS rumors.

Looking forward to 6c/12t Coffee Lake!

I think that I, too, am very interested in seeing those (all part of my again going back and forth: CFL-S 6C/12T vs. SKL-X for gaming, now and in the future until Ice Lake(-X)/Tiger Lake(-X)).

Looking at the gaming results, which is more sensitive to memory than most other consumer applications, the reduced L3 might be a problem.

This is what I am wondering about as well, and I really like to see how CFL-S fares.
 

exquisitechar

Senior member
Apr 18, 2017
683
940
136
Could just be a golden sample, unless you're telling me every Broadwell/Skylake/Kabylake OC's to 5GHz on air, like all those previews err(ly) leaks showed? There's also the temps & power consumption to take into account.

I guess it's possible, but rather unlikely for 4.7GHz to be a golden chip (according to what people in the know are saying). I bet most will be capable of that. Temps will be scary, that's for sure.
 
Reactions: Sweepr

R0H1T

Platinum Member
Jan 12, 2013
2,582
162
106
The power consumption is actually in the ballpark. If you consider extra ram and other penalties, it's actually equal or better to Ryzen in the video encoding benchmark for work done.
No it's not ~ (112.7/76.3)*113=166.9

Though that's the platform power, it still shows how inefficient SKL-X is compared to the regular Ryzen, TR might be a different story but I doubt Intel can just make up for the difference of ~50 watts.
 
Reactions: Ozzyrulez

Karnak

Senior member
Jan 5, 2017
399
767
136
The power consumption is actually in the ballpark. If you consider extra ram and other penalties, it's actually equal or better to Ryzen in the video encoding benchmark for work done.
The power consumption is actually really bad according to the hexus review. perf/watt is even worse than BW-E (6950X).

Get's even worse when comparing the 7900X to the Ryzen 1700.
 
Reactions: Ozzyrulez
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