Yes, I need to compare with no-delidded CPUs to see what to expect. 

Would that be the blend test then?

 

 

Might be a bit higher in RealBench. 

 

I think it's blend test. Will download and try RealBench too. Haven't played with overclocking for more than five years since the lucky 2500k. 

 

I have "Kill A Watt" meter and I can see my system idles around 60W. At 5GHz it consumes around 180W running non-AVX Prime 95. At 4.8GHz it consumes 225W running AVX-enabled Primer 95 and CPU temperature will soon run away to >90C in few minutes that I have to stop the test. That also means AVX alone is like 40W extra on CPU power consumption? That's amazing how power-hungry these AVX codes are.

 

My 7700K clearly appears to be hitting the wall around 4.8-5 GHz with the Noctua DS15 cooler. At 4.6GHz everything is cool at 1.25V and <55C running AVX primer 95.

 

I decided not to use AIO water cooler b/c I'm still hesitant on the reliability of liquid cooling. Figured Noctua is about as good as $100 AIO? 

Hi Yang..I'm on liquid cooling and I'm running very hot even at 4.8Ghz. At stock settings at 4.5, in RealBench it maxes at 78C. The real question is how high it gets on flight simulation. 

Agree. As long as XP11, P3D etc run fine that's all I'm concerned about. Will first try XP11 tonight. 

It seems at 5 Ghz in P3D I get 60-80C most of the time, with some peaks to 89-90C. At 4.9 or 4.8 situation is quite the same. The performance is excellent though. I'll keep it like that. If I'm not missing something, I believe without delidding its difficult to drop much less than that.

It seems at 5 Ghz in P3D I get 60-80C most of the time, with some peaks to 89-90C. At 4.9 or 4.8 situation is quite the same. The performance is excellent though. I'll keep it like that. If I'm not missing something, I believe without delidding its difficult to drop much less than that.

 

Not sure how's for this CPU but 80-90 is a lot.

With Devil's Canyon I get 65-70 at 4.8GHz with stock corsair liquid cooling.

Only stress tests & all core rendering push it to 75-80 celsius. 

Found an interesting article about Gigabyte's motherboard. I paste the interesting part about the temperatures. Interesting that these comments are without OC..:
 

" For the first test, we’re focusing on the Gigabyte Z270 Gaming 7 motherboard being tortured with large Fourier transforms for half an hour. The i7-7700K is constantly in the 90C range, occasionally hitting 94C. Ambient was 21-22C for all these tests, so our temperature range is roughly +/- 1C. Active logging was performed with logging thermometers and thermocouples to ensure accuracy of ambient.

 

This was the first board we tested, so the immediate concern was that Kaby Lake would run way too hot. With the same stock configuration on the Gigabyte Gaming 7 board, a $50 Be Quiet! Dark Rock 3 air cooler was hitting 100C routinely, resulting in throttles upwards of 200MHz. Our Asetek 570LC fat 120mm cooler with Gentle Typhoon fan also was approaching 100C.

 

Clearly, something seemed wrong. Further investigation revealed that the motherboard was pushing voltages as high as 1.404v at times, which is wholly unnecessary. The MSI Z270 Gaming Pro Carbon motherboard, meanwhile, produced an auto-configured voltage of about 1.28v to 1.32v, with a corresponding temperature range of 80-82C max. This is with a package power that’s reduced around 27W from Gigabyte’s, but with exactly the same frequency performance.

 

We then dropped the Gigabyte board down to 1.275v manually, giving it a range of 1.188 to 1.275v. This brought temperature down from 94C max to about 70C max, or a 24C difference (same configuration, test platform, and ambient) as a result of better, manual vCore control. This is less an Intel problem and more of a Gigabyte problem. We have been in communication with all three motherboard vendors since our temperature testing began (about 1-2 weeks ago), and have made Gigabyte aware of the issue. Fortunately, the unnecessarily high auto voltage is something that is resolvable through firmware updates. If Gigabyte got ahead of the game, they may be able to roll-out BIOS patches prior to board shipment – but we’re not sure right now, and certainly can’t rely on that."

 

Source: http://www.gamersnexus.net/hwreviews/2745-gigabyte-z270x-aorus-gaming-7-review

I've just ordered a new PC with a 7700K and Z270 so will be interested to see how it performs. I've only ordered a cheap TX3 EVO cooler with it to keep costs down so probably won't be overclocking it anytime soon. Keen to see the difference though. Moving from a laptop with i7 @ 2.4-2.7 with GT745m to a PC with [email protected] should be interesting.

OK, just to confirm that my 7700K max overclock is 5.0 GHz (50 x 100MHz) at 1.395v, AVX offset = 2. RAM is 1.485v @ 3000MHz. 

 

I can pass both RealBench at 5.0 GHz using such settings with CPU temps run between 75-85C, occasionally touch 90C. 

 

At 4.8 GHz (48 x 100MHz), 1.365v it passes Prime95 with AVX no problem. Temps around 80C depending the tests I chose. 

 

So I'll just stick with this profile. The 140mm 12v fan on Noctua DS15 can be very noisy at full speed when temperature goes high. For flying flight sim I don't really care - I just pretend it's engine sound.. 

 

Nonetheless I may try a quieter fan to see if it makes difference. The cooler fins and heatpipe right from the CPU block are totally cool even when CPU is reported running at 80-90C so maybe I can reduce the fan speed further. 

After testing some retail OEM 7700k this week all pass RogRealbench benchmark at 5.0ghz

Vcore 1.24v up to 1.39v for the bad one , average 1.34v, temp is more related to vcore

1.24v CPU pass 5.2 at 1.36v at 85C probaly do 5.3 1.42v delidded with colabatory ultra at 80C.

Shall delidd that one next week have some more to test.

 

the retail CPUs lotteria is the same as Skylake , avarge 5.0 ghz up to 5.3-5.4 for Golden chip.

7700k do in avarge 300-400mhz higher than a 6700k

So mine actually is a bad one... it does 5 GHz between 1.395-1.405v (auot Vcore by ASUS motherboard).

 

Well, at least it's 5GHz ... I'm satisfied. 

 

The thing is I can't really tell whether XP11 beta 5 runs better or not. Maybe 10% better than my 2500k on stock scenery on high/max settings, but exactly the same terrible fps (8 fps) on ortho sceneries that I used to get >20fps with my 2500k on beta 2. 

 

Another thing killing me is my Thrustmaster  Warthog HOTAS now always disconnect within seconds when I run the same script. Essentially can't be used as programed. Guess this is the thing due to Windows 10? I'll have to find time to see what is going on. I already did some goolging and disabled all the power management option in all USB devices listed in Device Manager/HID category. No difference. 

 

 

my Thrustmaster Warthog HOTAS now always disconnect within seconds when I run the same script. Essentially can't be used as programed. Guess this is the thing due to Windows 10?

 

No problems with Warthog and Windows 10 here.

 

gb.

It seems at 5 Ghz in P3D I get 60-80C most of the time, with some peaks to 89-90C. At 4.9 or 4.8 situation is quite the same. The performance is excellent though. I'll keep it like that. If I'm not missing something, I believe without delidding its difficult to drop much less than that.

 

 

 

There is a way you can drop a full 10 degrees. Simply switch of Hyper Threading. It's debatable whether HT is useful for the sim anyway. Try it, see if you notice any difference in your simming experience. I suspect you won't see any difference.

 

Those peaks to 90 are interesting. What are you measuring the temp with? 

Lowered the vcore a fair bit. So far it's been stable.

 

 

 

So I'll just stick with this profile. The 140mm 12v fan on Noctua DS15 can be very noisy at full speed when temperature goes high. For flying flight sim I don't really care - I just pretend it's engine sound.. 

 

Nonetheless I may try a quieter fan to see if it makes difference. The cooler fins and heatpipe right from the CPU block are totally cool even when CPU is reported running at 80-90C so maybe I can reduce the fan speed further. 

 

 

What temp are you seeing when your fan is noisy? Have you configured your fan profile correctly? Default fan profiles, in the UEFI, or in a Windows utility are usually less than optimal. Play with your fan profile and you may be able to reduce noise levels.

 

Same advice I gave earlier, if you don't mind HT off, you will drop approximately 10 degrees. In which case your fan noise levels will drop too.

 

The NH-D15S is a fantastic cooler. You won't find better fans than the 150mm Noctua fan. If it's ramping up to max RPM, 1500 RPM, then yes you will hear it, but there aren't any quieter fans at the equivalent CFM and static pressure that I know of.

 

My advice is don't be obsessed with 5GHz. There's nothing magical about it. If your fan profile is correct and the CPU fan is ramping up to max due to heat, in normal everyday use [simming] then in my opinion you are over doing it. Worth remembering that 100 MHz or 200 MHz [and thus lower voltage and temp] equates to very little in terms of frame rate, one or two frames per second at 30. Meaningless really. 

 

Don't hesitate to back of the overclock and voltage if you're running warm.

 

 

The cooler fins and heatpipe right from the CPU block are totally cool even when CPU is reported running at 80-90C so maybe I can reduce the fan speed further. 

 

 

 

 

That might suggest that you can achieve great things with delliding. Might suggest that your Die/IHS interface isn't performing optimally. I can't vouch for the veracity of that, just a suggestion. May well be that heat pipes don't get very warm. To be honest I've never felt mine when under load.

 

If you like, I'll measure the temp of my D15S heat pipes with my laser thermometer so we can compare. It's  6700K though, but might be interesting. But of course you may not have a laser thermometer.

 

Found an interesting article about Gigabyte's motherboard. I paste the interesting part about the temperatures. Interesting that these comments are without OC..:

 

 

 

 

 

They were using auto voltages though. It was also an early BIOS. It was just the auto rules that were immature.

 

I presume you're configuring your voltage manually?

 

Same applies to everyone with a Kaby in this thread. It's early days. The BIOS is still immature. No doubt there will be many BIOS iterations, in which case overclocking stability, max overclock and temp will probably improve.