Is this a "good" 4790K?

[TheVorlon_44]

HI everybody, I know diddle & squat about overclocking, but based upon my very limited knowledge I "think" I may have gotten at least a little bit lucky in the silicon lottery....

I am using a 4790K with an asrock z97E-ITX ac motherboard, 16 gigs of middle of the road Corsair DDR3-1866 (@1866 mhz) with a Seasonic Fanless Platinum 520 watt power supply.

I am also using a Corsair H80i water cooler.

Doing nothing but setting the multiplier to 4.8 and leaving everything else on "auto" the machine boots to windows and "speccy" shows all 4 cores at 4800 mhz.

I can run the 32M of wPrime with no issues at all (ie no crash) but the temperature is quite high (about 79-80 degrees)

Is this a good chip? - and what would be the next steps to try?

Thanks in advance to all the smart people for helping out the Overclocking nubie 🙂

 

[JBURNS489]

is that 79-80 degrees celsius or fahrenheit? Is that an idle temp or load temp? If you are getting 79-80 degrees C at idle, you went too far. If that is your load temps, you should be fine! A game will never stress your CPU more than a program like prime95 will, and 79-80 isn't a horrible high temp at all for 4790k

 

[TheVorlon_44]

is that 79-80 degrees celsius or fahrenheit? Is that an idle temp or load temp? If you are getting 79-80 degrees C at idle, you went too far.

That is 79-80 Celsius, and that is the more or less constant temperature when running an eight thread wPrime 32M - which shows all 4 cores/8 threads at 100%

 

[JBURNS489]

I personally wouldn't go any further, not that I'm an expert by any means. The higher your temps get, the shorter life span your card is going to have. But thats a great overclock lol. I think thermal throttling for that CPU is 84

 

[Sleetz]

with a Seasonic Fanless Platinum 460 watt power supply..

This is a good power supply but I think 460 watts is pushing it to overclock, that is my guess as to why your temps are high. I have the same water cooler and I rarely get above 50C while gaming for hours on an FX-8350 4.7GHz overclocked.

 

[PhysX_HW]

Comparing this with an FX-8350 is pointless, especially because the FX was running games and you were running prime95 which is a VERY extreme stress test.
Assuming that the motherboard did not give any extra voltage to the CPU, 4.8Ghz at base voltage is an impressive result.
But always make sure the temps are under 85-90°C. The Tjunct that is supposed to be the maximum temperature for this CPU is 72°C but I've seen these running fine over 80°C so don't worry about that.

The bigger problem is your motherboard. Do you seriously want to run this CPU overclocked in an ITX board???
It would be fine if it was a maximus impact or even a less expensive normal ATX board, but an ITX. 😀
I bet the VRM gets VERY hot and that surely decreases the board's lifespan so get a proper motherboard for overclocking.

 

[DonkeyOatie]

Comparing this with an FX-8350 is pointless, especially because the FX was running games and you were running prime95 which is a VERY extreme stress test.
Assuming that the motherboard did not give any extra voltage to the CPU, 4.8Ghz at base voltage is an impressive result.
But always make sure the temps are under 85-90°C. The Tjunct that is supposed to be the maximum temperature for this CPU is 72°C but I've seen these running fine over 80°C so don't worry about that.

The bigger problem is your motherboard. Do you seriously want to run this CPU overclocked in an ITX board???
It would be fine if it was a maximus impact or even a less expensive normal ATX board, but an ITX. 😀
I bet the VRM gets VERY hot and that surely decreases the board's lifespan so get a proper motherboard for overclocking.

Hey!. I have an ASRock Z97E mITX/ac and a couple of ASRock Z87 mITX/ac board. My 4690K overclocks as well on it as it does on my ASRock Z97M OC Formula. The E has better power phases than the M (6 + 1) The temperatures are OK, in my Thermaltake V1 case. I can't get a big enough cooler in there to get to 4.8Ghz, but 4.7Ghz is respectable.

 

[TheVorlon_44]

I selected the components I did because I want ed a quick, but also silent (or near so) machine.

The H80i in "quiet" mode is close to silent, and the power supply is totally silent, so other than the optical drive there is almost no noise.

I didn't build this to overclock, but figured I'd give it a shot.since I'm here 🙂

 

[DonkeyOatie]

Are you using the XMP profile to run your memory at 1866Mhz? or is it as some other default speed?

What is your Vcore voltage? (Run the free HWMonitor to check)

Near 80C when stress testing is fine, near 60C under normal heavy use is fine. That chip runs a little warm anyway.

The next thing to do would be to see if you can reduce the voltage to gain headroom to try for 4.9Ghz

 

[TheVorlon_44]

UPDATED:

Hi Everybody

CPU boots to windows at 5.0 ghz (ok, actually 4988.1 ghz)

Voltage is 1.400 (which is kinda high?)

Machine will also boot at 4.9 ghz and seems normal at 1.352 Volts which seems a ton safer

CPU idles at 25 degrees C when at 4.9 ghz.

 

[TheVorlon_44]

UPDATED:

Hi Everybody

CPU boots to windows at 5.0 ghz (ok, actually 4988.1 ghz)

Voltage is 1.400 (which is kinda high?)

Machine will also boot at 4.9 ghz and seems normal at 1.352 Volts which seems a ton safer

CPU idles at 25 degrees C when at 4.9 ghz.

UPDATE:

4.9 ghz @ 1.312 Volts

 

[DonkeyOatie]

That's amazing. Are you running Adaptive, and if so, what Offset, if any, are you using?

 

[TheVorlon_44]

That's amazing. Are you running Adaptive, and if so, what Offset, if any, are you using?

The offset in the bios is set to "auto"

In fact everything is set to auto except cpu voltage with is set to "0verride" at x.xx volts, and the "all core enhancement" (ie all cores same clock) and then the multiplier.

I "think" 4.8 GHz is the limit of my cooler.

wPrime 32m takes the cpu to 80-81 degrees Celsius at 4.8 and I understand that is the safe upper limit.

 

[DonkeyOatie]

If you tune to adaptive, you will be able to drop the idle voltage down quite a lot.

 

[TheVorlon_44]

If you tune to adaptive, you will be able to drop the idle voltage down quite a lot.

You are right about the adaptive setting.

At 4.9 ghz when idling the voltage is only .981 volts according to CPUID HWMonitor

Can not seem to get the machine to boot to 5.0 ghz in adaptive mode, if I set voltage to override at 1.391 it will boot to Windows, but not in adaptive more.

I

 

[DonkeyOatie]

You can add some Offset to the Adaptive which might help. It is great to have achieved 5.0Ghz, I know how happy I was to get 4.8Ghz on my i5. However, 1.391v is more voltage than I would want to use on a 24/7 basis. As a processor 'wears' it slowly requires more and more voltage to reach the same frequency. I've noticed it myself and that's a sign to turn the wick down a bit.