i7-7700K Underclock + Undervolt

[AlexG.Tech]

I am interested in running my i7-7700K at very low voltage until I am able to perform a delid. Anyone have experience with underclocking and undervolting Kaby Lake CPUs?

I am able to have a ROCK SOLID 4GHz @ 1.0V Manual & 1.0V Standby.

What kind of clocks can you get with 1.0V?
What is the lowest stable voltage you can get at stock frequency?

This is with no AVX offset.
I have achieved this while overclocking the integrated graphics (HD630) to a ratio of 28 with an offset of +.4V. This allows me to get 1400MHz on the integrated graphics. At 100%, the IGPU reaches max of 75C.

[Enderman]

Why...?

[RadiatingLight]

Depends on your CPU. There's no clear-cut answer. you'll just have to try it. there's even a chance that it will work like normal on 1V, just disable turbo-boost.

 

What temps are you getting? temps on a stock 7700K should be good enough, even with a stock cooler, to run at. with your H100i V2, you should be getting great temps. enough to OC a lot without delidding.

 

[AlexG.Tech]

1 minute ago, Enderman said:

Why...?

Because silence

[AlexG.Tech]

2 minutes ago, RadiatingLight said:

Depends on your CPU. There's no clear-cut answer. you'll just have to try it. there's even a chance that it will work like normal on 1V, just disable turbo-boost.

 

What temps are you getting? temps on a stock 7700K should be good enough, even with a stock cooler, to run at. with your H100i V2, you should be getting great temps. enough to OC a lot without delidding.

 

Max of 60C, not delidded.

[RadiatingLight]

1 minute ago, AlexG.Tech said:

Max of 60C, not delidded.

so what's the point in delidding? why slow your CPU performance down for nothing?!

[AlexG.Tech]

Just now, RadiatingLight said:

so what's the point in delidding? why slow your CPU performance down for nothing?!

I can get a stable 5GHz no AVX offset, but the temps are outrageous. Fans at 100%.

4GHz @ 1.0V is only a max of 60C while my H100i-V2's fans are only at 1400RPM.

I can't even hear my PC, and my power supply's fan doesn't even kick on. I am delidding soon for lower temps so I can run it at 5GHz instead of 4GHz.

I was just curious how low people can go while staying stable.  

[RadiatingLight]

Just now, AlexG.Tech said:

I can get a stable 5GHz no AVX offset, but the temps are outrageous. Fans at 100%.

4GHz @ 1.0V is only a max of 60C while my H100i-V2's fans are only at 1400RPM.

I can't even hear my PC, and my power supply's fan doesn't even kick on. I am delidding soon for lower temps so I can run it at 5GHz instead of 4GHz.

I was just curious how low people can go while staying stable.  

Damn

Sounds like a really bad TIM application.

 

H100i V2 should be able to cool a 7700K at 5Ghz no problem.

[Enderman]

10 minutes ago, AlexG.Tech said:

Because silence

But delidding is't going to make it quieter...

[AlexG.Tech]

Just now, Enderman said:

But delidding is't going to make it quieter...

Delidding yields lower temps, lower temps requires less airflow, less airflow is quieter... Or am I mistaken?

[Mooshi]

14 minutes ago, AlexG.Tech said:

Because silence

That makes no sense... If you want silence, stock or undervolt isn't going to make a difference. If you want true silence, ditch the aio all together, slap a giant slap of aluminum without a fan for passive cooling, low rpm pwm fans to have some sort of air flow to not cook your system and a fanless psu.

 

Edit: I see, you wanna run at 5ghz with lower temps to not push the system as hard..lol, I was so confused at first as to why bother with an unlocked chip + aio.

[AlexG.Tech]

1 minute ago, Mooshi said:

That makes no sense... If you want silence, stock or undervolt isn't going to make a difference. If you want true silence, ditch the aio all together, slap a giant slap of aluminum without a fan for passive cooling, low rpm pwm fans to have some sort of air flow to not cook your system and a fanless psu.

I am undervolting because I am in a pinch until I can afford to change my system. The TIM on my chip sucks balls.  It is a lot quieter, and I can't hear the pump in my case (NZXT H440 Razer)

[WereCat]

I understand why you want to undervolt it, but why the hell would you want to underclock it?

I managed to overclock my i7 4770k from 3.5GHz to 4.0GHz while undervolting it to 1.04V.

I run 4.6GHz at 1.3V now though.

[AlexG.Tech]

1 minute ago, WereCat said:

I understand why you want to undervolt it, but why the hell would you want to underclock it?

I managed to overclock my i7 4770k from 3.5GHz to 4.0GHz while undervolting it to 1.04V.

I run 4.6GHz at 1.3V now though.

I had to underclock to 4GHz to keep is stable. I wouldn't let me go down to 1.0V at stock. I think it's because I use the integrated graphics overclocked with a voltage bump. It's weird to OC the Intel HD 630. It's only a few hundred MHz though, so I can deal with it until I can delid and replace the AIO. The AIO's fans are awful as well.

[AlexG.Tech]

I feel like a lot of people are missing the point of the post though lol. I was just curious about how low a ratio of Voltage to Frequency people are able to get on Kaby Lake...

[tom_w141]

33 minutes ago, RadiatingLight said:

Damn

Sounds like a really bad TIM application.

 

H100i V2 should be able to cool a 7700K at 5Ghz no problem.

Have you been living under a rock? 7700ks suffer badly from this. Intel advise not to overclock them (lol). Delidding a 7700k and replacing with something like conductonaut can yield 20-30 degree gains.

 

32 minutes ago, Enderman said:

But delidding is't going to make it quieter...

Temps are lower so cooling solution doesn't work as hard. Not working as hard means the pump and fans are slower therefore less noise. so yes quieter

 

30 minutes ago, AlexG.Tech said:

Delidding yields lower temps, lower temps requires less airflow, less airflow is quieter... Or am I mistaken?

Don't worry you are correct, some obviously haven't had their coffee yet.

 

Quote

It's weird to OC the Intel HD 630

I'm very curious as to why on Earth you'd bother with this? iGPU sucks and doesn't get used anyway if you have a dGPU? Only use case I can think of is quicksync for streaming but even then that's the worst way to stream.

[WereCat]

35 minutes ago, AlexG.Tech said:

I had to underclock to 4GHz to keep is stable. I wouldn't let me go down to 1.0V at stock. I think it's because I use the integrated graphics overclocked with a voltage bump. It's weird to OC the Intel HD 630. It's only a few hundred MHz though, so I can deal with it until I can delid and replace the AIO. The AIO's fans are awful as well.

You would have to be very lucky to get only to just 1.000V at 4GHz

[done12many2]

From February:

On 2/7/2017 at 7:24 PM, AlexG.Tech said:

On my 7700k, I was able to reach a max of 5252 MHz at 1.37V stable, but was ridiculously hot. I then opted to go silent by lowering the frequency and voltage down. I am pretty sure I've hit the silicon lottery with a stable OC'd 7700k set to 4.8GHz at 1.120V. I don't have a GPU yet, so I'm using the integrated Intel HD 630, overclocked to a ratio of 28 at 1.4V at 3030MHz. My temps never go above 70C on the CPU, with my fan curve set so my fans never go above 1000 RPM. It is nice and quiet! Have I hit the lottery?

Specs:

CPU: 7700k at 4.8GHz 1.120V
GPU: Intel Graphics HD 630 at 1.4GHz 1.4V
Mobo: Asus Maximus Hero IX (z270)

CPU AIO: Corsair H100i-v2 at less than 1000RPM

Case: NZXT H440 Razer Edition
PSU: EVGA Supernova 650W (80+ Gold)
RAM: Corsair Dominator Platinum DDR4 3000MHz 32GB (16GB x2)
SSD/M.2: Intel 600p Series NVMe 256GB
HDD: WD Green 1TB + old drives less than 200GB for Windows recovery/backups

What kind of stable frequency and temps are you seeing at 1.2V?

On 2/7/2017 at 9:14 PM, Lays said:

What are you stability testing with? 

On 2/19/2017 at 4:28 AM, AlexG.Tech said:

Aida64, Geekbench, Asus Intel etu, CPU-Z stress test, Prime 95, The furry donut gpu test, and combinations of multiple at once, including BOINC distributed computing tasks. Most running for hours, but it is absolutely rock solid at 4.8GHz@1.12V. I hit 74C on the cpu package once, because ambient was 28C. I am still considering de-lidding the CPU to stay at least above 5GHz 24/7, just for bragging rights, naturally. lol

 

 

 

From today:

6 hours ago, AlexG.Tech said:

I can get a stable 5GHz no AVX offset, but the temps are outrageous. Fans at 100%.

 

 

@AlexG.Tech  You created a thread just like this 4 months ago (but a poll for 1.12v) and alleged that you were able to run Prime95 at 5252 MHz completely stable.   You actually opened your first thread with this bold claim. Then today you dropped 252 MHz from you claim from 4 months ago.  

 

Long story short, you purchased the best current day overclocking chip, but paired it with an average cooler.  You realized that it wasn't going to hit consistently high clock speeds, which is what everyone else in the overclocking world actually cares about so you changed the game to let's see how low you can go.  Truthfully, you should have bought a 7700 (non K) or something different altogether. 

 

Switching gears and back on topic (not that my other remarks weren't).  

 

So here's the thing.  Silicon quality is silicon quality.  An above average chip is an above average chip.  If a chip doesn't do great on the top end, chances are that it doesn't do great on the bottom end.  While this isn't necessarily always true as chips can scale clock speed/voltage differently based on leakage, this rule generally remains true.

 

Anyways, not that anyone actually gives a crap, but for the sake of science and "silence" here is my chip at 4 GHz with .944v  (notice the lack of the 1 before the decimal point).  I'd try lower, but this should work.

 

 

CPU: 7700k @ 4 GHz  /  Voltage: .944v  /  Max core temp: 38c  <-- I was starting to get nervous 

Conditions:

- in load with AIDA64 CPU, FPU, and Cache stress tests running

- ambient temp: 24c

- water temp: 25c

- no AVX offset (that's weak shit)

 

 

 

 

[Enderman]

7 hours ago, tom_w141 said:

Temps are lower so cooling solution doesn't work as hard. Not working as hard means the pump and fans are slower therefore less noise. so yes quieter

8 hours ago, AlexG.Tech said:

Delidding yields lower temps, lower temps requires less airflow, less airflow is quieter... Or am I mistaken?

Why didn't you just buy a lower power 7700 or other i7?

Instead of undervolting you can just limit CPU usage in windows, it will have the same reduced performance and reduced temps effect.

The temp decrease from delidding is very little unless you start OCing and pushing voltage really high.

If you want silence then you buy a passive cooling solution.

[done12many2]

2 minutes ago, Enderman said:

Why didn't you just buy a lower power 7700 or other i7?

Instead of undervolting you can just limit CPU usage in windows, it will have the same reduced performance and reduced temps effect.

 

You quoted the wrong dude.  @tom_w141 isn't the OP.    He was only helping to clarify a point. 

[Enderman]

4 minutes ago, done12many2 said:

 

You quoted the wrong dude.  @tom_w141 isn't the OP.    He was only helping to clarify a point. 

you quoted me before I finished editing my post

[AlexG.Tech]

18 hours ago, done12many2 said:

From February:

 

 

 

From today:

 

 

@AlexG.Tech  You created a thread just like this 4 months ago (but a poll for 1.12v) and alleged that you were able to run Prime95 at 5252 MHz completely stable.   You actually opened your first thread with this bold claim. Then today you dropped 252 MHz from you claim from 4 months ago.  

 

Long story short, you purchased the best current day overclocking chip, but paired it with an average cooler.  You realized that it wasn't going to hit consistently high clock speeds, which is what everyone else in the overclocking world actually cares about so you changed the game to let's see how low you can go.  Truthfully, you should have bought a 7700 (non K) or something different altogether. 

 

Switching gears and back on topic (not that my other remarks weren't).  

 

So here's the thing.  Silicon quality is silicon quality.  An above average chip is an above average chip.  If a chip doesn't do great on the top end, chances are that it doesn't do great on the bottom end.  While this isn't necessarily always true as chips can scale clock speed/voltage differently based on leakage, this rule generally remains true.

 

Anyways, not that anyone actually gives a crap, but for the sake of science and "silence" here is my chip at 4 GHz with .944v  (notice the lack of the 1 before the decimal point).  I'd try lower, but this should work.

 

 

CPU: 7700k @ 4 GHz  /  Voltage: .944v  /  Max core temp: 38c  <-- I was starting to get nervous 

Conditions:

- in load with AIDA64 CPU, FPU, and Cache stress tests running

- ambient temp: 24c

- water temp: 25c

- no AVX offset (that's weak shit)

 

 

 

 

I agree with everything you've posted in the comment, but I bought the 7700K because I like to experiment. I was able to keep 5252MHz stable, but it would thermal throttle every few minutes, even with all of my case fans on 100%. I had set the thermal throttle threshold in the BIOS to somethig like backing off 100MHz and lower voltage until it cooled down to 90F or something like that. I stopped doing that because I would like to prolong the life of my hardware. It had been a while since I maxed out the CPU's OC so I forgot the 252MHz. That wasn't what this post is about. I appreciate that someone here actually gave their undervolt/clock result! Everyone just wants to argue instead of answering a question. Thank you for the screenshot as well. I haven't tried under 1.0V yet, but I will soon. Thank you for the reply.

[AlexG.Tech]

Long story short, I have the 7700K. I found it to be too hot, I will underclock & undervolt to lower temps until I can delid.

I have the Intel HD 630 OC'd so I can play Cities Skylines at 1080p until I find out just how competitive Vega will be.

Please stop telling me I made the wrong hardware choice and actually think about my question. K thanks. It really is very toxic on this forum.