5ghz

[Guest2]

I have a new i7 4790k and it clocks pretty well, so far at 4.7ghz, with 1.220 core voltage.

Max temps in IBT is 82c this is using a noctua nh-u14s.

Should I try for 5ghz, possibly with 1.29? Does anyone know the max temps for these chips

Thanks

 

[Guest2]

Thanks.
Is it better to leave C3 on to lower voltage when not loaded and also leave EIST so the frequence isnt at 4.7 (or whatever speed) when idle?

I have always disabled them before but surely its better for the chip if they run cool when not needed

idle temps at 800mhz are around 30c

 

[Guest2]

Thats weird, coretemp and realtemp are now showing max of 100c when running IBT!

Core voltage is still at 1.200v. Could the temp sensors be wrong or something else pushing up the temps? This is at 4.6ghz (46 x 100 on manual multi, no memory overclock)

I could understand if it was crashing due to not enought voltage or if it was on auto or set to 1.4v or something but its not

 

[Guest2]

The fan on my Noctua NH-U14S doesnt sound like it ramps up at all even when running tests, is this normal or is it just a pretty quiet fan even at max rpm?

 

[Guest2]

Hmmm, something is wrong somewhere. I hae just removed the overclock and gone back to stock settings. Running Intel burn test at maximum increases temps to 100c and fan cpu fan speed goes to max - 1480RPM

It suddenly jumps from 66c > 100c when running IBT

Voltage reported in CPUZ is 1.236. Do you think the max temps are incorrect or could it be to do with something else such as XMP or another setting?

Motherboard is Gigabyte Z97X-Gaming 7 with the latest F7 bios

edit - its also a new HSF with new Arctic MX4 applied

Thanks

 

[Guest2]

I have just re-seated the HSF thinking it was that (chip not touching the pad properly) but still the same.

Temps initially go to ~65 then jump to 100 after about a minute and I notice the voltage on auto also jumped to 1.285v at the same time. This is with stock auto settings

Using IBT v2.54.

If my config is corret and temps are 100c then Intel or the people who created IBT need to put a disclaimer on their software as it could potentially easily break a lot of CPUs

Will try real bench now

Thanks

 

[Guest2]

Realbench I get an appcrash within as few minutes 'LuxMark-x64.exe' running the stress test. Is there a good program that just tests CPU or you can target CPU/Memory/GPU seperately?

 

[Guest2]

Starting to get somewhere again.
1.230 in bios at 4.7ghz. Disabled C1, C3, C6/7 and EIST, left XMP enabled

Is it normal for 1 core to be ~5c hotter than the rest?

Realbench pic

Spoiler

 

[Guest2]

Is it normal for vcore to auto to 1.236 under load and 79c when left at stock settings? (4ghz turbo to 4.4ghz) Seems a bit high, especially as I am using a noctua nh-u14s. If I left the Intel stock cooler installed it would get roasting hot and probably throttle when running RealBench

 

[Guest2]

Not that bothered to be honest. I'm now perfectly content with my 4.7GHz overclock @ 1.214v. I don't care about more as I just don't see the point. Voltage goes up loads, temps follow. Could delid, but 4.8 is all I would get under 1.3v, so why bother?

FYI, I lapped my e6600 for the lols back in the day.

At 1.214v is it stable in real bench? I tried that and handbrake crashed almost instantly when running the stress test. Im now at 1.275v in real bench stress test - its quite brutal on gpu & cpu

Edit - it turns out the crashes were a combination of too little vcore and too high clocks on gpu memory. Im happy enough at 4.7 with 1.275, max temp is 91 in real bench stress test

Off topic but are haswell known to be poor clockers? All this effort for .3ghz overclock! My Lynnfield managed a 1.2ghz overclock with worse cooling than i have now! Thats like taking the 4790k to 5.6ghz - anyone managed that?

 

[Guest2]

What HSF are you using? One thing I noticed was my heatsink doesnt get that warm like they used to - surely this means heat is staying on the cpu and not transferring properly to the tower.

 

[Guest2]

Ta. Do both radiators get hot or stay reasonably cool. I think i could be missing something such as too much / too little thermal paste or block not properly on the cpu. I put a pea sized amount on in the middle of the cpu (a grain of rice is a lot smaller than a pea what some people recommend) Maybe I put too much on

 

[Guest2]

After 30 mins of real bench at 1.275 it hit 98c! Even for me thats rather high. Im sure im using the right holes for the mounting bracket but will check later (and also re-apply a smaller amount of paste

 

[Guest2]

When they say pea do they mean petit pois? That's what I've been assuming all these years.

I assumed a petitpoi, yes. Though i suppose it could be a jumbo peo, or chick pea!

A grain of rice size is a lot smaller than a petitpois though

edit. Pic showing temps in spoiler

What is the diffreence between these two? I have 1.275 vcore set in BIOS.

Voltage - CPU VCORE - 1.284v - 1.296v
i7 4790k - VID - 1.275

It seems to have slightly lowered temps slightly by adding a small line of paste instead of a blob (similar to here - http://i1268.photobucket.com/albums/jj576/powerresponsibilityhow/20140626_195951_zps73832ecd.jpg )

Spoiler