• Competitor rules

    Please remember that any mention of competitors, hinting at competitors or offering to provide details of competitors will result in an account suspension. The full rules can be found under the 'Terms and Rules' link in the bottom right corner of your screen. Just don't mention competitors in any way, shape or form and you'll be OK.

8700k to 5ghz

so your cpu probably needs 1.33-1.34v for cb15 which translates to approximately 1.36-1.39v for realbench after deliding. You stated that it didn't pass realbench even at 1.4v, I think it should but it ran into temperature constraint and caused instability. Also, your testing procedure should be finding the stable overclock for the cpu first and then ram/cache later.
 
BTVA said:
so your cpu probably needs 1.33-1.34v for cb15 which translates to approximately 1.36-1.39v for realbench after deliding. You stated that it didn't pass realbench even at 1.4v, I think it should but it ran into temperature constraint and caused instability. Also, your testing procedure should be finding the stable overclock for the cpu first and then ram/cache later.
Click to expand...

I have the delidding kit coming tomorrow but I’m a bit hesitant to do it if I have a bad chip
 
Well it’s taken 1.378v to get through real bench but had to do the -2 offset, hopefully I will get a little wiggle room when I delidd hottest core 88c
 
woppy101 said:
Well it’s taken 1.378v to get through real bench but had to do the -2 offset, hopefully I will get a little wiggle room when I delidd hottest core 88c
Click to expand...

It will be the AVX instructions that will be heating up the chip, so the offset will be a big help. To compare non-avx loads try running prime 26.6 and what temps do you get then at a sustained 5ghz?

This might also be counter-intuitive - but have you tried for 5ghz at 1.3v - heat may be more of a problem for you and you might only be making it worse by putting too many volts in
 
Last edited:
Spudgun said:
It will be the AVX instructions that will be heating up the chip, so the offset will be a big help. To compare non-avx loads try running prime 26.6 and what temps do you get then at a sustained 5ghz?

This might also be counter-intuitive - but have you tried for 5ghz at 1.3v - heat may be more of a problem for you and you might only be making it worse by putting too many volts in
Click to expand...
Heats under control at when testing with CineBench but it won’t run more than 4 runs with 1.325, I will try at 1.3 but I wouldn’t expect it to do more than a minute in realbench
 
Well you've already decided your next step, but if it's any consolation, there's very little real world difference between 4.8Ghz and 5.0Ghz, especially if you're gaming at higher resolutions where the GPU has more of an effect.

Also I noticed earlier in the thread that you had your IO voltage quite high at 1.3 at one point, increasing that too much can actually cause instability, it doesn't work the same way as Vcore where more volts generally equal stability (provided temps are under control).

Also just out of curiosity was your ram at stock while testing? In my opinion it's better to keep everything stock as otherwise you're adding too many variables. I personally focus on the CPU first, and then once I find a stable overclock, then test RAM, and then test both of them together once I've found "stable" overclocks for both.

I'm very ocd though and tend to test everything at stock first to make sure things are ok. It's not unheard of for Ram to be bad and fail testing at stock speeds never mind trying to overclock it....

If you're overclocking everything at the same time and you get instability it makes it much harder to pinpoint the route cause.

A ridiculous example would be like overclocking cpu, ram and gpu and then playing a game and crashing. You're gonna have no idea what caused the crash.

Good luck with your new chip anyway....

gavinh87 said:
I usually have poor luck with silicon aswell
Click to expand...

I'm the same, although I've noticed on certain forums that those that "win" the lottery tend to buy lot's of "tickets". They literally go through cpu after cpu for a good one.

You can be lucky on your first go of course, but I never am. My 8700k won't go past 4.9Ghz regardless of volts, that's with a -2 offset too. Temps start becoming a problem for me after 1.35 volts unfortunately, so maybe I could get 5GHz plus with 1.4. I "hate" those that apparently get 5ghz with 1.2 volts lucky so and so's lol.......

The other thing is different people have different idea's of what constitutes stable, some people run an hour of prime, others 24 hours, other's real bench, others game. I've had overclocks in the past that won't pass overnight Prime but will be fine playing the likes of GTA V and Just Cause 3 for hours on end...
 
Last edited:
I've never bought an oem on any chip and had a good clocker. Next up is retail for me, see if I fair better.

I won't bother stating the reason why
 
You must log in or register to reply here.
Back
Top Bottom