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

Noxia said:
Probably a return.
Click to expand...

This bothers me greatly. How can I ensure I get a *New* chip and not one that 8 Pack has rejected or a return, or even one over a year old? I'm just waiting for Noctua D15s to come in stock before ordering and am considering getting the DC elsewhere.

The boxes aren't cellophane wrapped or sealed so impossible to tell unless its marked in some way.
 
I only test system stocks.

I have been very ill I have tested 4 DC Chips OEM in total all LN2 and air all are here on my desk.

Those Overclocking DC need to lower VCCIN for best results it seems. In my testing say your using 1.3 Vcore 5ghz 32m stable with VCCIN 1.4v. With 1.5 stable 18 loops. With 1.6 not stable at all. Just a tip. Try it out.
 
Should be able to see if a CPU has been used. There will most likely be marks on the IHS from the retention bracket.

The one I recieved and complained about a few pages back was most certainly not used, but it was just a VERY poor job by Intel. Not to mention it was over a year old.


Getting my new 4790k delivered in an hour or so, hopefully an improvement from the last one.
 
Good to see you back 8 Pack, and hope your recovery is going well.

How's the search going for decent clocking 4790k's. And thanks for posting that tip.:)
 
I have 4 doing 5ghz 1.3v or less. 2 that can run everything at less than this around 1.24v.

VCCIN is key for this it seems. You guys need to test and report back.
 
Not bad there. From reading the massive thread on oc.net, there isn't too many 5ggz sun 1.3v chips around. VCCIN is input voltage iirc?
 
8 Pack said:
In my testing say your using 1.3 Vcore 5ghz 32m stable with VCCIN 1.4v. With 1.5 stable 18 loops. With 1.6 not stable at all. Just a tip. Try it out.
Click to expand...

Takes me back to overclocking Pentium IIIs - best way to get 133MHz FSB was to drop the northbridge voltage to keep the temps down! :)

Of course, now I'm hoping that everyone here suddenly gets 5GHz on air after tweaking this setting ;)
 
8 Pack said:
I only test system stocks.

I have been very ill I have tested 4 DC Chips OEM in total all LN2 and air all are here on my desk.

Those Overclocking DC need to lower VCCIN for best results it seems. In my testing say your using 1.3 Vcore 5ghz 32m stable with VCCIN 1.4v. With 1.5 stable 18 loops. With 1.6 not stable at all. Just a tip. Try it out.
Click to expand...

Thanks for the tip, will give this a try when I get home tongiht. Isn't VCCIN the voltage that Intel recommend to be atleast 0.4v above cpu volts?
 
Top setting in Gigabyte Voltage settings on OC series bios classic mode.

It is the Voltage that is sent from the board to the VRM on the CPU that outputs to the core.

I am sharing what I have noticed here guys. +0.08 over CPU voltage brought instability for me with 0.1 being about the best for my CPU which all seem to like low settings. Try and see how you get on.

I tested me theory on ASUS M7G, Gigabyte Z97 OCF and MSI X Power all the same result lower was better upto the 0.08 threshold.
 
Thanks, pretty sure my chip can do 4.8 but struggled with temps a bit. Doesn't help that I don't really know what I'm doing other than setting he vcore and changing load line calibration.
 
My first one hit 4.8 on 1.32v, 1.88 input. Passed a few benches but not stable in games. Yet to try this second one. First one was am L3, current one is an L4.
 
8 Pack said:
I only test system stocks.

I have been very ill I have tested 4 DC Chips OEM in total all LN2 and air all are here on my desk.

Those Overclocking DC need to lower VCCIN for best results it seems. In my testing say your using 1.3 Vcore 5ghz 32m stable with VCCIN 1.4v. With 1.5 stable 18 loops. With 1.6 not stable at all. Just a tip. Try it out.
Click to expand...

hmm weird i have always been using 1.8v default vrin on my z97
and you say using down as low as 1.4 gains stability compaired to over 1.6 very strange
i will give this a try at the weekend and check some results.
 
8pack/guys

Does this lower vccin voltage also work with standard haswell ? Or we talking just DC here ?
Since they are primarily the same core thought Id ask.

Cheers :)
 
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