i7-7700K or Delid i7-6700K

[ValkyrieStar]

Hi all, ive recently got a new CPU cooler;

 

Thermaltake Water 3.0 Ultimate (360mm AIO)

 

I decided to overclock my 6700K, starting from the 4.3ghz profile i had set before, which was reaching 85c on my old cooler, was now only 66c on the highest core. I pushed it to 4.5ghz and got that stable, temps are 77c on hottest core. The only problem now is that i feel im limited by cooling even though i shouldnt be.

 

As soon as i press start, temps jump from idle (around 27c from 19c ambient) straight up to 77c, and stay there no matter how long the test runs for, and as soon as i press stop, straight back down to 27c. I have a feeling delidding with CLP would fix that and drop temps by at least 10-15c.

 

4.3GHz @ 1.240v - 66c (was 85 on old cooler)

4.4GHz @ 1.290v - 72c

4.5GHz @ 1.340v - 77c

 

Board is Asus Maximus VIII Gene, LLC is set so voltages are exact.

 

My question is should i delid and push further, or wait for a 7700K and see how far i can push that?

[Lays]

Delid will help, use CLU not CLP, CLU is better

[Matias_Chambers]

It probably wont be worth upgrading to a 7700K. You can delid it, but you have to be careful. You could easily damage it and have a bad memory controller or something like that. Worst case scenario would be the CPU not working at all. And like @Lays said delid it with CLU. 

[ValkyrieStar]

I originally meant CLU (i have some from my 4790K from a couple years ago). I've delidded a lot of cpus now, i3 3220 / i3 3250 / i7 3770K / i5 4690K / i7 4790K, now soon to add either 6700K or 7700K to that list. Ive never had any issue with the chips ive delidded so i should do fine, i use heatgun and vice method using a rubber strip to pad it against the metal so it doesnt mark or anything.

 

I've a feeling 4.6GHz will need 1.390v and 4.7 will need 1.440v or more, so im not too sure about running that in long term, though it should still last a while.

 

I might just wait for the 7700K and a little longer to see what pops up on silicon lottery, my cooler is better than what theyre running to test their chips so i should be all good to go if i bought a chip from there. (Hoping for a 5GHz 7700K).

 

Another question is it normal for the same thread to crash in prime95, upping vcore fixes it but its 0.04v higher than the other cores need. Disabling that core leaves the 3 remaining cores perfectly stable at the lower voltage. Did i get a faulty chip?

[Lays]

14 minutes ago, ValkyrieStar said:

I originally meant CLU (i have some from my 4790K from a couple years ago). I've delidded a lot of cpus now, i3 3220 / i3 3250 / i7 3770K / i5 4690K / i7 4790K, now soon to add either 6700K or 7700K to that list. Ive never had any issue with the chips ive delidded so i should do fine, i use heatgun and vice method using a rubber strip to pad it against the metal so it doesnt mark or anything.

 

I've a feeling 4.6GHz will need 1.390v and 4.7 will need 1.440v or more, so im not too sure about running that in long term, though it should still last a while.

 

I might just wait for the 7700K and a little longer to see what pops up on silicon lottery, my cooler is better than what theyre running to test their chips so i should be all good to go if i bought a chip from there. (Hoping for a 5GHz 7700K).

 

Another question is it normal for the same thread to crash in prime95, upping vcore fixes it but its 0.04v higher than the other cores need. Disabling that core leaves the 3 remaining cores perfectly stable at the lower voltage. Did i get a faulty chip?

 

 

If you delid your chip it will reduce the voltage required for clocks, due to lower temps.  It should help achieve higher clocks for sure.

[ValkyrieStar]

2 minutes ago, Lays said:

 

 

If you delid your chip it will reduce the voltage required for clocks, due to lower temps.  It should help achieve higher clocks for sure.

I did try reducing the voltage at 4.3ghz when i first fitted the cooler, but i still had thread #7 fail with anything below what i had set before at much higher temps.

 

Im still thinking it best to hold out and get an i7-7700K and delid that, i was originally going to get an i3 6320 for temporary use till i got a 7700K but i ended up getting an in store offer on the 6700K so i got that instead lol (only 295 GBP instead of about 350 everywhere else at the time)

[MorganO]

8 minutes ago, ValkyrieStar said:

I did try reducing the voltage at 4.3ghz when i first fitted the cooler, but i still had thread #7 fail with anything below what i had set before at much higher temps.

 

Im still thinking it best to hold out and get an i7-7700K and delid that, i was originally going to get an i3 6320 for temporary use till i got a 7700K but i ended up getting an in store offer on the 6700K so i got that instead lol (only 295 GBP instead of about 350 everywhere else at the time)

get a custom loop with an 80mm think 480 rad :P, but whats your need to oc?

 

[Lays]

1 minute ago, KOMTechAndGaming said:

get a custom loop with an 80mm think 480 rad :P, but whats your need to oc?

 

those 80mm thick 480 radiators are terrible unless you run 1500+ rpm fans on them.

 

30mm rads with low RPM outperform it lol

[MorganO]

1 minute ago, Lays said:

those 80mm thick 480 radiators are terrible unless you run 1500+ rpm fans on them.

 

30mm rads with low RPM outperform it lol

kewl, did not know dat

[Lays]

Just now, KOMTechAndGaming said:

kewl, did not know dat

they're so thick that air just doesn't circulate through them right, so if you want to run less than 1500-2000 RPM fans on them, they actually perform worse than their thinner counterparts.

 

It's sort of misleading because everyone thinks, oh thicker = more surface area = more betta

[MorganO]

1 minute ago, Lays said:

they're so thick that air just doesn't circulate through them right, so if you want to run less than 1500-2000 RPM fans on them, they actually perform worse than their thinner counterparts.

 

It's sort of misleading because everyone thinks, oh thicker = more surface area = more betta

yeah, i have a fractal s36 rin and i plane to do a custom loop witth the radiator eventually

[ValkyrieStar]

1 minute ago, KOMTechAndGaming said:

get a custom loop with an 80mm think 480 rad :P, but whats your need to oc?

 

Been the custom route before, too much hassle and everything (i had 240 + 360 x 40mm thick for both cpu and gpu), hard to service and a lot of work to change 1 part in the system etc.

 

Here's a screen of my current temps, prime95 v28.9 on small ffts

[MorganO]

1 minute ago, ValkyrieStar said:

Been the custom route before, too much hassle and everything (i had 240 + 360 x 40mm thick for both cpu and gpu), hard to service and a lot of work to change 1 part in the system etc.

 

Here's a screen of my current temps, prime95 v28.9 on small ffts

so you want cooler temperatures?

[Lays]

2 minutes ago, ValkyrieStar said:

Been the custom route before, too much hassle and everything (i had 240 + 360 x 40mm thick for both cpu and gpu), hard to service and a lot of work to change 1 part in the system etc.

 

Here's a screen of my current temps, prime95 v28.9 on small ffts

Here's an example what to expect with a custom loop + delid so your ambients are around ~13c, here's prime95 small FFT at ~16c ambient temp

 

 

 

[ValkyrieStar]

22 hours ago, Lays said:

Here's an example what to expect with a custom loop + delid so your ambients are around ~13c, here's prime95 small FFT at ~16c ambient temp

 

 

 

 

22 hours ago, KOMTechAndGaming said:

so you want cooler temperatures?

Indeed, cooler temperatures, and a higher overclock, if the 7700K is going to reliably hit 5ghz for most chips, then im more interested in that, though if you believe i can overclock a decent amount further to perhaps 4.8 then id be more interested in keeping this 6700K and delidding. It seems that the issue is the transfer of heat from the cpu to the cooler, as the cooler stays cold, ive reseated it once already with no differences to temps and the ihs-cooler mount was in even contact with the whole thing which i was impressed by.

 

Still feel slightly annoyed with this 4th core though, disabling core #4 leaves me with 3 cores all running at much lower votages, infact without core 4 i am stable at 4.6 at 1.340v and temps are better without that rubbishy 4th core.

 

Would it be worth the effort trying to return the 6700k for another?

[MorganO]

23 minutes ago, ValkyrieStar said:

 

Indeed, cooler temperatures, and a higher overclock, if the 7700K is going to reliably hit 5ghz for most chips, then im more interested in that, though if you believe i can overclock a decent amount further to perhaps 4.8 then id be more interested in keeping this 6700K and delidding. It seems that the issue is the transfer of heat from the cpu to the cooler, as the cooler stays cold, ive reseated it once already with no differences to temps and the ihs-cooler mount was in even contact with the whole thing which i was impressed by.

 

Still feel slightly annoyed with this 4th core though, disabling core #4 leaves me with 3 cores all running at much lower votages, infact without core 4 i am stable at 4.6 at 1.340v and temps are better without that rubbishy 4th core.

 

Would it be worth the effort trying to return the 6700k for another?

Dont know tbh i only have a 3930k at 4.6 at 1.384v which gets warm, didnt see much temp differences going from a coolermaster nepton 140 xl to a fractal s36  

i would wait till people have actually got the 7700k(after release) and see what people OC are etc before you do anything, whats the reason for OCIng your 6700k? Its still a good chip?

 

[ValkyrieStar]

On 01/01/2017 at 9:54 AM, KOMTechAndGaming said:

Dont know tbh i only have a 3930k at 4.6 at 1.384v which gets warm, didnt see much temp differences going from a coolermaster nepton 140 xl to a fractal s36  

i would wait till people have actually got the 7700k(after release) and see what people OC are etc before you do anything, whats the reason for OCIng your 6700k? Its still a good chip?

 

 

Yeah i think im gonna wait, ill try to push 4.6 or 4.7 with my 6700K but i dont know how lucky ill be with this 4th core making me have to use a lot more voltage than the other cores.

 

Im overclocking because well, i like to have everything tuned up as high as possible. Ive even tweaked the timings on my ram to their absolute best, thankfully memory clocks dont seem to affect cpu clocks any more, interesting how dram power reading on my 5820K at same speed and timings was about ~12w peak while only ~7w peak on my 6700K, must be the imc power rather than the actual dimm power.

[ValkyrieStar]

I attempted 4.7GHz, while i still had a little temperature headroom for more voltage, i was at a rather high 1.45v and i dont wanna burn this thing, so i settled for 4.6ghz at 1.385v.

 

...

 

Now i've just found out why my temps and volts are much higher than most peoples, because i'm using prime95 v28.10 (latest as of 30th oct 2016)...

 

I downloaded and ran 26.6 and at the same clocks and volts, 10c less.

I was able to run 4.9 at 1.45v stable for 5-10 mins (how long i could be bothered to test for) with the older version of prime95, at just 79c on the highest core. I loaded my 4.5ghz profile and managed to drop 0.09v off that and was again stable for 5-10 mins, loading the new p95 at that setting resulted in the system completely cutting out, no bsod or anything, just death. RIP.

 

So what i will ask, why do people use this old prime95 if it does not push the thing to its absolute limits. That's like a saying a bugatti veyron is safe to drive at 263mph round sharp corners because it's ok going in straight lines at that speed. I'd much rather have a 100% stable system that will not crash under any circumstance, that i know will be 100% stable because its been stressed to its absolute limits and nothing else will ever push it that far.