***Intel i7 4790K Owners thread***

[Jediben]

It's pootling along in AIDA64 at 4.8ghz on 1.24v right now. 78c is the max temp under an H100i on 'quiet' profile.

 

[Dirk Diggler]

Hmm well I have just read it but I don't intend to teak my memory timings at all at this stage, and I can't identify what the equivalent of RING voltage is on my Asus bios. The guide seems to be an awful lot of changes that don't explain what they are outside of that particular motherboard bios.
I've seen that my bios has an Initial CPU Voltage value which has been auto set to 1.872v, but given the operating range of the chip is not much more than 1.3 I am a little worried by this now!

There is no way your CPU is running at 1.872 vcore, that must be your Vrin external override voltage you're looking at.

 

[Jediben]

That's the setting in the BIOS at least. I don't really have an understanding of what Initial CPU Voltage does, and I've got the manual right here Google time...

 

[Jediben]

Well it was going well at 1.25v for 4.8Ghz, but 4.9 took me up to 1.28v and still BSOD within a few minutes on AIDA so I might have to be happy with 4.8

 

[BluD]

Apparently its the voltage available to supply the Core, Ring, iGfx, System agent and the I/O components. THey then all have their own voltage setting including offsets, but just set it .5v above your vcore, then if you go for 1:1 cpu and uncore ratio then you might need to add a little more as you increase your ring voltage.

 

[BluD]

Can you try 1.3v or are you restricted by temps?

edit: took me about .05v more to get from 4.8 to 4.9, i would be very happy with your chip if it does 4.9 at 1.3v.

 

[Jediben]

I'm not suffering tempwise - it was at 82c max under 1.28v but I am wary that I'm either missing some other timings which need to be adjusted rather than just throwing more volts at it. The step up from 1.25 to 1.29 fora mere 100mhz gain is the same increment in V as I made 800mhz for!
I've only had the chip two days (the Hero has been a bit of a **** when it came to installing things - audio had some serious popping, sata devices were spontaneously disappearing, the trouble I had with my Saitek x52 and the bloody usb 3 settings. I could go on!) and I'm not sure I wan't to overdo it while the H100i is still 'settling'.

edit: thanks for checking up on that initial vcore thing was, very handy

 

[BluD]

Nps, yeah could just be a case of turning up your LLC or Phase Performance to a higher setting.

 

[fat4l]

It's pootling along in AIDA64 at 4.8ghz on 1.24v right now. 78c is the max temp under an H100i on 'quiet' profile.

Mate... Rather try a program that stress a cpu to make sure ur system is stable. Aida64 is not very good at it honestly.
Try asus real bench. Run bench not stress. When running bench select just H264. Make about 5-10 runs(Or run stress test for several hours,min 2).
Then u can claim its stable

 

[Dirk Diggler]

Well it was going well at 1.25v for 4.8Ghz, but 4.9 took me up to 1.28v and still BSOD within a few minutes on AIDA so I might have to be happy with 4.8

If you haven't adjusted load line calibration, then your vcore may be sitting higher than the 1.28 you have it set at in bios. Open CPU-Z before you start your stess test and have a look at your core clock and vcore voltage as the test runs.

I've got a feeling your vcore won't be 1.28 on full load, it'll be higher.

Also, in my experience, the best stability test is overnight encoding with Handbrake and a few hours playing some demanding games.

Good luck!

 

[Jediben]

Seems to be staying up with 1.282v:

 

[kimandsally]

Here is my best 4790K out of 11 I bought and tried.

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Loved this CPU had a good few hours of enjoyment from her, I never thought I was going to find that elusive 5GHz 4790K.
I'm moving on to a nice 4770K that I have found to see what I can get from that

 

[Dirk Diggler]

Seems to be staying up with 1.282v:

Maybe your LLC is set to keep the voltage solid by default.

Anyway, if you get that clock speed stable with those volts and that temperature, you've got a cracking chip there.

 

[BluD]

Here is my best 4790K out of 11 I bought and tried.

Nice one, how much do you lose each time you trade one in? I assume ya just selling them on auction site or some thing.

Im guessing the ones that clock quite high sell for a fair bit more than the price you pay for it new.

 

[SWEagle]

I'm been out of the overclocking game for quite some time but I'm decided to setup a new rig. I didn't wanted to spend allot of money but I also wanted something to last a few years.

My rig is a mini ATX with a MSI Z97m gaming, TeamGroup memory's Xtreem 2666mhz and a I7 4790k.

Initially I was using the stock Intel cooler and I had my CPU a 4.5Ghz. But then I bought a Corsair AIO liquid cooler (105i).

This is the progress of the OC:

1.100v - 4.5 GHz
1.200v - 4.7 Ghz (It could boot into Windows at 4.8Ghz but not prime stable
1.230v - 4.8Ghz prime stable
1.290v - 4.9Ghz
1.330v - 5.0Ghz prime stable

Here is the pic:

I could also boot at this speed but not prime stable:



I think that with a proper Watercooling and a little more voltage I could go even higher.

 

[BluD]

Another nice chip, i would stick it on 5 ghz and be happy thats a nice voltage to be running at 24/7

 

[Jediben]

Kimandsally/SWeagle - awesome stuff. You both seem to have great chips there
I tried for 4.9Ghz but I was on 1.3v and it still wasn't stable under Realbench, so I am going to be satisfied with 4.8 @ 1.28v. Overall I am very please with this outcome - my previous 2500k was a little bit lame and only went to 4.5Ghz under 1.35v so this is much improved

 

[BluD]

Yeah much better, ive gained 500mhz over my 3570k and hyperthreading cant hurt.

 

[McGraw]

I need 1.224v for 4.5. Very jealous.

 

[Darkman]

I'd definitely echo the recommendations of running the RealBench Benchmark test, particularly the H.264 Video Encoding and Heavy Multitasking modules. I found that overclocks that were stable in other benchmark software I tried would trip up with RealBench.

The ultimate test I found for testing a RealBench stable overclock was encoding a large FRAPS .avi in Handbrake. If it passes that it'll be fine in any game I've found.