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i7 8700k overclock results and settings - Page 9

post #81 of 1412
Quote:
Originally Posted by terrorindeed View Post

I should also note, at 4.3ghz auto, the vcore is at 1.325

When the Hero is all on Auto the 8700k runs at 4.7ghz on all 6 cores and 4.4ghz cache, due to MCE being on by default.

When you are running Realbench, are you monitoring your temperatures and what are they as the stress test is running?

What cooling solution do you have on your cpu, air, AIO or Custom loop?
Edited by tknight - 10/21/17 at 7:47pm
post #82 of 1412
So I have an 8700K on a X Hero. I've clocked it to 4900 with a vcore of 1.25. However my VID in HWMonitor is 1.494. Is this safe? I'm even afraid to stress test.

As you can see I'm a n00b OC-er so any help is appreciated.
post #83 of 1412
Quote:
Originally Posted by tknight View Post

When the Hero is all on Auto the 8700k runs at 4.7ghz on all 6 cores and 4.4ghz cache, due to MCE being on by default.

When you are running Realbench, are you monitoring your temperatures and what are they as the stress test is running?

What cooling solution do you have on your cpu, air, AIO or Custom loop?

In a previous post I mentioned I’ve disabled MCE, hence the stock 4.3ghz All core turbo. Kraken X62, prime 95 failed after 3.5 hours , frozen screen. I rebooted, now I’m stuck in a Error 18 on the board, removed all DIMMS, no luck, reset CKOS. new board tomorrow, I’ll update then.

Realbench was at 84C, aida64 was at 70C, Prime95 at 94C
post #84 of 1412
Quote:
Originally Posted by linbetwin View Post

So I have an 8700K on a X Hero. I've clocked it to 4900 with a vcore of 1.25. However my VID in HWMonitor is 1.494. Is this safe? I'm even afraid to stress test.

As you can see I'm a n00b OC-er so any help is appreciated.

If vCore is set to "Auto" the voltage will automatically change to a much higher voltage. Dont go above 1.4v for 24/7 use.
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post #85 of 1412
Quote:
Originally Posted by WannaBeOCer View Post

If vCore is set to "Auto" the voltage will automatically change to a much higher voltage. Dont go above 1.4v for 24/7 use.
No, I set vcore manually to 1.25, but VID is above 1.4, almost 1.5. Is this normal?
post #86 of 1412
Quote:
Originally Posted by linbetwin View Post

No, I set vcore manually to 1.25, but VID is above 1.4, almost 1.5. Is this normal?

As far as i understand VID is what the chip is asking/thinking it is getting.

A quote from the author of HWinfo - "This has been discussed several times here - VID is not the measured Vcore, but the voltage the CPU requests (and thinks it gets). Some mainboards might apply certain offsets to VID, so the CPU might in fact be getting a different Vcore."
post #87 of 1412
For people running their 8700K @4,9 GHz and higher, what is your VCore and VID shown by HWMonitor and HWiNFO ? My VCore is around 1.248 and my VID is around 1.45.
post #88 of 1412
I reverted back to auto freqs with a manual vcore of 1.20, down from 1.25 for my 4.9 OC. But my VID stays unchanged. Can you guys check your VID on Coffee Lake? Maybe monitoring tools do not read voltages correctly on CFL (I've got the latest versions on HWMonitor, HWiNFO and CPU-Z) or maybe this is just what the CPU expects, not a real voltage.
post #89 of 1412
Quote:
Originally Posted by linbetwin View Post

I reverted back to auto freqs with a manual vcore of 1.20, down from 1.25 for my 4.9 OC. But my VID stays unchanged. Can you guys check your VID on Coffee Lake? Maybe monitoring tools do not read voltages correctly on CFL (I've got the latest versions on HWMonitor, HWiNFO and CPU-Z) or maybe this is just what the CPU expects, not a real voltage.

VID is the voltage Intel sets that your chip needs to run stable, and that's really it
gotta remember that voltage can fluctuate, especially on lower end boards, and even on higher end ones (thats what we like to use LLC for), so Intel needs to use some kind of value that's safe
and obviously every chip is different in what voltage it needs for certain frequencies
depending on the version of HWiNFO the VID from kaby was quite wrong, sometimes by a few volts

coffee lake being "new" I wouldn't be surprised if readings are off

anyway

vcore is the actual important value


bit dated, but I dont think anythng has changed

http://www.overclock.net/t/665362/vid-voltage-identification-explained
Quote:
Is a lower VID better?
Generally yes, lower VID CPUs overclock more because they tend to come from better batches that need less vcore for higher speeds. The lower vcore causes lower temperatures, which again allow for higher speeds. However, there are always exceptions. Some Q6600’s with a VID of 1.10v (So called golden batches) found themselves unable to overclock as far as a CPU with a VID of 1.28750v. The VID was better but the overclock was worse. Some chips are just not as good in overclocking as others.

Edited by peter2k - 10/22/17 at 8:47am
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post #90 of 1412
Quote:
Originally Posted by terrorindeed View Post

In a previous post I mentioned I’ve disabled MCE, hence the stock 4.3ghz All core turbo. Kraken X62, prime 95 failed after 3.5 hours , frozen screen. I rebooted, now I’m stuck in a Error 18 on the board, removed all DIMMS, no luck, reset CKOS. new board tomorrow, I’ll update then.

Realbench was at 84C, aida64 was at 70C, Prime95 at 94C

8700K is dead. Memory Express is refunding me and I’m getting another one in their next batch of orders.
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