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bought 3 4670k's cant Overclock past 4.3GHZ

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post #1 of 19 (permalink) Old 01-29-2020, 11:00 AM - Thread Starter
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bought 3 4670k's cant Overclock past 4.3GHZ

Building a side pc and Im having problems overclocking a 4670k. I was planning on delidding, but the first processor I bought was only stable at 4.3GHZ at 1.26V steady under load. I bought another 4670k thinking I had lost the silicon lottery, and it only did 4.1GHZ at 1.25V, which is worse than I have ever heard of. I sold that cpu and bought another yet and this one also only hits 4.1GHZ at 1.26V!

I assume something is wrong here, from what I see the average 4670k hits 4.5ghz, the very worst 4.3, and the best 4.8, so the odds I buy 3 and they are all literally worse than the worse is very very low.

I'm here to see if any of you have suggestions? maybe there is a setting I need to change or something that might help the overclocks?

Motherboard: MSI z87m gaming(latest BIOS)
chinese 6 heatpipe tower cooler with 2 Arctic pressure fans
temps stay around 65-67C in P95 at 1.26v with a peak a few minutes in to 85C

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post #2 of 19 (permalink) Old 01-29-2020, 11:03 AM
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What's the input voltage?

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(21 items)
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i7 5775c @4.2GHz/3.8GHz
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post #3 of 19 (permalink) Old 01-29-2020, 11:13 AM - Thread Starter
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For the VRM? default is 1.7v I believe, I raised it to 1.8 with no change

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post #4 of 19 (permalink) Old 01-29-2020, 11:20 AM
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Try 1.96V and set cache voltage to 1.35V so it will be out of equation and never interfere. Also, if on 4.1GHz 1.26V you have peaks on more intensive test to 85C for a few minutes... You literally have no headroom for OC.

PC for all
(21 items)
CPU
i7 5775c @4.2GHz/3.8GHz
Motherboard
Gigabyte Z97X Gaming 5
GPU
Iris Pro 6200
RAM
F3-2400C11D-16GAB Samsung Rev. Q
Hard Drive
Corsair MP510
Hard Drive
Samsung Evo 860
Power Supply
Seasonic Focus Plus 750W
Cooling
Artcic Liquid Freezer II 360mm
Cooling
Arctic P12 PWM x2
Cooling
Arctic P14 x4
Case
LianLi 330X
Operating System
Windows 10 64-bit Pro
Monitor
Samsung C24FG73FQUX
Monitor
Benq GL2250 80Hz
Keyboard
Corsair Strafe Red Silent + 1.6x6mm o-rings
Mouse
SteelSeries Rival 600
Mousepad
Artisan FX Raiden
Audio
Audio in Motion SC808 + MUSES8820 + 2x 2xLME49990
Audio
AKG M220
Other
NZXT Hue+
Other
Mayflash F300 Arcade Stick
▲ hide details ▲
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post #5 of 19 (permalink) Old 01-29-2020, 11:28 AM - Thread Starter
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Ill try that when I get home. I have run for over an hour, temps mostly stay below 70. I have everything to delidd as well, but it will do nothing if these chips really do clock this bad

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post #6 of 19 (permalink) Old 01-29-2020, 11:31 AM
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A lot of the Haswell chips clocked badly, the early chips were generally better though

DDR2 Frequency 1st Place = 910.1MHz DDR (1820.2MHz) - http://hwbot.org/submission/3589779

Reference Frequency 10th Place = 711.18MHz - https://hwbot.org/submission/3978447_


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post #7 of 19 (permalink) Old 01-29-2020, 11:47 AM
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Yeah I had a 4770k and it would only do 4.3GHz even with really good custom waterloop and delid. I got a 4790k and that was able to run 4.8GHz on the same setup. With you seeing 85c you might not have much if any headroom for OC anyway.



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post #8 of 19 (permalink) Old 01-29-2020, 12:50 PM
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Quote: Originally Posted by Noxinite View Post
A lot of the Haswell chips clocked badly, the early chips were generally better though
I dont entirely agree with this. I had two G3258's do 4.9ghz with little effort. And there are some 4770K's still floating around the board doing 4.5ghz+.

@OP if you are looking for more performance you might consider a 4770K or if possible jumping to devil's canyon which overclocks much better. A 4790K would usually have no trouble doing 4.7ghz.

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post #9 of 19 (permalink) Old 01-29-2020, 12:56 PM
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1.26v is not terribly high for Haswell.

Get some better cooling on them and give it a bit more voltage before giving up on them.

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post #10 of 19 (permalink) Old 01-29-2020, 12:58 PM - Thread Starter
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Well I tried the above voltage changes with no improvement. I guess I must just be unlucky. Ill consider getting a 4690k as it might have better binning, this is just a budget computer for gaming, so hyperthreading that won't help games for 3x the cost doesn't make much sense. Thanks for the help all

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