4790k overclocked 4.2ghz vcore 1.071 are my temps normal??

willabyblen · Jul 31, 2015

Hi,

I have a 4790k currently running at 4.2ghz with my vcore at 1.071v offset voltage.

my build is in a corsair 760t full tower

I have two intake fans at the front, one intake at the bottom, one exhaust at the rear and my h110i gt rad with the two fans exhaust.

I have a h110i gt cooler and the pump water temps are at 33.7c using blend prime 95 and 34.1c.
using intel burn test
I am using the supplied Thermal paste that was preapplied to the cooler.

my ambient temp are at 29c

my rad fans are running at 1800rpm

my pump is running at 2800rpm

I am doing a prime 95 v26.6 stress test blend test and am getting max temps of 59c

when using intel burn test and running it on maximum 67c

my idle temps are lowest 29c

With reviews on various sites they are getting much cooler temperatures than me and im wondering if the pump has been fitted properly?. I have the backplate installed as it should with the notches in the backplate in the correct area. from the look of my water pump temps and the stress tests themselves does this seem correct/normal?

should i go through the hassle of remounting my cooler?

bazzarooney · Jul 31, 2015

A lot of thermal pastes have a curing time which can measure in the 10s-100s of hours before they are most efficient.

spentshells · Jul 31, 2015

Perfectly fine to good even. I would look to continue pushing this overclock as there seems to be sufficient headroom. 1.15mV core and shoot for 4.5Ghz. It's worth a shot.

At full load you really don't want to cross 70C.
72.something would be a real thermal limit to avoid damage.

jonathan1683 · Jul 31, 2015

is that even an over clock? the chip will go to 4.4 on it's own. the temps are low and idle where mine does on water cooling. not sure if you have any problem...

iamacow · Jul 31, 2015

[strike]something is wrong with your setup. @ stock voltage you should really never go above 70c with that cooler. Even at 1.35v @4.6ghz I never hit above 80c with a H100i. So I would unmount and see if your thermal paste is messed up or you mounted it wrong.

worse case, your pump is broken.

Also people have it wrong. You can go all the way to 100c before it downclocks with no harm. I say no harm because at stock voltage these chips are meant to go for 10+ years. Normally if you overclock the half-life of the chip decreases as the heat goes up. So the lower the temps, the longer the chip will last.[/strike]

oops, I thought the ops post said 95c, not 55c.

spentshells · Jul 31, 2015

Yes it is, with turbo boost on it will turbo to 4.6.

OP as for my advice above. Disable turbo boost. This is also a reason you may be seeing slightly higher temps.

willabyblen · Jul 31, 2015

iamacow :

hi thanks for the reply,

how would i know if my pump is broken? it seems using corsair link it says it is running at 2800rpm at the moment. if it was faulty wouldnt it just how as 0 rpm?

i have a 1150 gigabyte z97x gaming gt motherboard do you think im getting that problem with the backplate? where the contact is not met properly someone over at overclock3d has put cardboard washers on his backplate and it improved temps by 10c. im a little sceptical though haha

willabyblen · Jul 31, 2015

spentshells :

thanks for the reply i will try disabling turbo boost to see how that goes thanks.

also how do i unselect a best answer i wanted to keep this topic open a little for some other feedback lol. i pressed the solution button instead of the reply button silly me!

spentshells · Jul 31, 2015

did it for ya.

willabyblen · Jul 31, 2015

great stuff thank you mate

willabyblen · Jul 31, 2015

ok now i have set the multiplier back to auto and bumped up the voltage to 1.185v and on intel burn test im getting 73c temps is that normal? i swear something is wrong haha. i have some noctua fans coming in the next few days i suppose i will remount the pump when they arrive and do the whole thing at the same time.

spentshells · Jul 31, 2015

Y did you up the voltage so high and leave the multiplier on auto?

willabyblen · Aug 1, 2015

Well here I go with my long story I hope this makes sense.

At first I thought I was overclocking my CPU but actually I was underclocking it.

I thought the 4790k turboboost was set at 4.0ghz by default. Not until yesterday did I realise it is actually default at 4.4ghz! ( I read intels spec sheet)

Don't ask me why I didn't know the turbo boost was 4.4ghz by default I just misread the clock for turbo boost

.

So thinking the turbo boost was at 4.0ghz I set the clock to 4.2ghz and got a stable voltage of 1.071v vcore.

The default voltage on my MB for a 4790k is 1.28v. I then went ahead and reduced the voltage to 1.185v and set the clock to auto for a 4.4ghz clock.

It has now been pretty stable at this voltage I did various tests and my prime 95 tests (maximum heat) are about 60c and my intel burn tests are about 73c.

To be honest im not happy with these temps at auto base clock but I am going to wait till I receive my new fans for the h110i gt and then just reseat the cooler and put some aftermarket noctua TIMM on the cooler and hope it will magically drop my temps.

Well I hope this made some sense to you, if you have any more feedback it would be greatly appreciated.

spentshells · Aug 1, 2015

new fans will not make that big of a difference, 1 or 2 degrees maybe, what thermal paste are you using? changing that may result in sizable gains of up to 5C

Anything on auto needs to be disabled with the excluding memory voltages and timings unless they are quite loose. remember though this chip with a stock of 4.0 is already most of the way into it's overhead as apposed to the other i5 chips which are clocked to a max of 3.5Ghz.

You may want to simply try to keep the overclock at 4.4 and drop to 1.1 on the core. It's worth a shot, all you have nothing to lose, if it's not stable to 1.13 and work your way up. Admittedly 73C is too hot.

willabyblen · Aug 2, 2015

thanks a lot im going to try with 1.1v and hopefully i can get a stable o/c thank you very much for the help

XlordB · Aug 2, 2015

On my rig with a 212 cooler my cpu multiplier x46 voltage 1.350 stable system max temps under stress about 85c. this is fine for i5 4690k devils canyon 90c+ is when you want to worry.

willabyblen · Aug 2, 2015

thanks a lot im going to try with 1.1v and hopefully i can get a stable o/c thank you very much for the help

4790k overclocked 4.2ghz vcore 1.071 are my temps normal??

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