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

Mal X said:
hi Setter

my new CPU is running better than my last 4770, my last CPU blew last week, i dont think i can blame the lap and delidd as that was a year ago..it's voltage looks like 1.26v at 4.4 OC, i cant seem to lower the voltage it's stuck on Auto

.
Click to expand...

i increased the OC to 4.6 but it gave me an Auto Vcore of 1.35, so i reduced this to 1.24 which knocked about 8 degrees off the CPU in Heaven, it looks like roughly 44 degrees now..

interestingly, reducing the voltage also reduced the FPS by about 4 frames..... 130 to 126 frames
 
I think there needs to be a rethink of degradation tends to be exagerated or shortened artificially ? for example my i5 750 does the exact same clocks needing the exact same voltage as it did the day I got it and the previous owner no doubt clocked it higher than me.Same went for the Q6600 before it.

Isn't probably more like 10 years before you need slightly more voltage to achieve the same clocks ?
 
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Also how much time do modern CPUs even spend at full voltage? My old Q6600 sucked down the full voltage 24/7 whereas my current machine hardly spends any time at full power.
 
I made a bit of a mistake going z97 lucky i only bought a £50 board and £35 cpu wish I'd known the 2600k 2700k match the 4790k easily.

Haswell and z97 seems the most pointless socket ever lol

Think i'll just wait it out for a 1156 board to come up and go back to my i5 750 and wait for skylake.Cant see any decent 8 threaded haswells being less than £100 any time soon.
 
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Edit: I undervolted my DDR to 1.62v and evidently that was unstable, so I need to basically start from scratch testing what the CPU is capable of. I was trying to encode using offset and now I will finish that with DDR @ XMP default 1.65v. Offsets do not tally with vCore have to go by what the HW sensor says to get same vCore @ load.

I've been doing some real world H265 encoding to test.

I've got round to doing some overclocking. I was under the impression that I could use 1.2v vCore but that wasn't the case.

Been using "Intel eXtreme tuning utility" for a preliminary stress test, then "x264 Stability Test V2" (which I found hard to get hold of).

My experience of Gigabyte's EasyTune is that it changes settings in the bios but the settings appear stock, so u can only tell its not at stock by looking at the PC health report.

I've been reading these guides:
http://www.overclock.net/t/1490835/the-gigabyte-z97x-overclocking-guide
http://www.overclock.net/t/1411077/haswell-overclocking-guide-with-statistics

This is what I've came up with and u can see the original resolution if u click on the "+":

vCore 1.26v with power saving disabled:


vCore same (might use offset next) with c3, c6/7, EIST enabled:


This is a 4690k with 3.5Ghz default so its quite a nice overclock already. All cores are x45 turbo and uni core is x40 as I just haven't touched it yet.

I know this test is good because I did a run with 1.2v, 1.23v vCore and Intel eXtreme overclocking utility passed and this test gave me a BSOD with 124 error code. So next I tried 1.26v - which to be fair is a lot lower than EasyTune gave it for 4.5Ghz, like 1.34v or something absurd.




This is just an example of what EasyTune sets, my vCore is 1.26v not 1.34v @ 4.5Ghz
 
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whyscotty said:
Cheers - got it to 4.8 with 1.295v so not too bad :)

Still tweaking so hopefully improve on that
Click to expand...

Not too bad, 1.300 for 4.7 here. Stable in all uses, benched it at 4.8 on 1.3100, not gaming stable though as it bsods with 0x101 which means more volts on what's already a hot chip.
 
I've got the 4690k and I just put the uncore to x35 cause when I used x45 cpu multi and auto uncore (x40) I got BSOD (auto Ring v) and hardlocking (+0.05v vRing). Basically its back to the drawing board with what is stable.

I did think my vCore was a bit high @ 1.26v for 4.5Ghz, the temps are good though. In HWiNFO64 mobo CPU temp = 58-60 degrees and core around 67 degrees. I did an encode at stock with XMP profile enabled and cpu temp was 40 degrees at load with 1.14v.

I'm encoding with x265 using mediacoder (alternative to handbrake), and that was what was giving me BSOD.

To be fair with the guide I was looking at, the first thing stated was to set uncore to stock (which I failed to do):
http://www.overclock.net/t/1411077/haswell-overclocking-guide-with-statistics
Under the +overclocking spoiler tab.

I haven't seen many people mentioning uncore in this thread but obviously in my case its critical for stability.
 
Skiddley said:
Mine's a Malay. Arrived today. Set the adaptive to +0.040v, stable at 4.6. Not tried higher yet, or lowering core voltage.

What's the typical adaptive offset you use?
Click to expand...
I reread your post after reading a guide and it has a warning about adaptive:

"NOTE: ONLY stress synthetics with adaptive OFF! It can force the motherboard to give the CPU more volts than you set it to under very heavy loads. This primarily happens with synthetic programs. Stressing with adaptive may overwhelm your cooling solution and cause sad things to happen. With override mode while running normal programs, you MAY still cause the CPU to get more voltage than you set it to, but the difference is down to say, 0.03v max. That isn't too bad but that is still significant, so be aware. The size of this small bump is basically the same from CPU to CPU. Some think this is due to a sensor inaccuracy. Either way, this small bump is normal."

I've linked to the guide in the previous post. Gigabyte boards don't have adaptive and C6/C7 states work by default rather than needing to enable adaptive on other brands of mobo.
 
String said:
No, the opposite is true. If I dial it down a notch, the vcore will fluctuate a little. The lowest setting has it fluctuating all over the place.

When set to extreme, the vcore never changes regardless of core clock.

Experiment a little with yours. Set a mild overclock and see what effect the different LLC settings have when under load. Just be careful, because when I set mine at the opposite end of extreme the vcore can fluctuate a lot.
Click to expand...
I learned that LLC affects CPU Vrin (eg 1.8-2.2v) and not vcore directly, this would explain your observations. I guess bumping up Vrin up a notch would compensate for vdroop instead of LLC.
 
Hi all, so am OCing my first i7 4790K, a new build watercooled system, am new to OCing and WCing, wanted to check some temperatures out with you to see if this is in the right ballpark or not. Any comment much appreciated. I am suspecting my CPU temps may be a bit high?

System:
CPU: Intel i7 4790K
MOBO: ReVenge Gigabyte Z97X-SOC FORCE
RAM: 32GB Team Vulcan Orange 2133Mz
GPU: EVGA GeForce GTX 980 Hydrocopper (x2, in SLI)

Waterloop details:
XSPC Dual D5 Vario pumps/res
XSPC 1x240EX radiator, 1x360EX radiator, 1x240RX radiator
XSPC Raystorm Intel Copper CPU block
XSPC fittings and Koolance QDC fittings
Aquaero 6 PRO fan controller

CPU settings:
CPU Vcore:1.3
CPU at 4.6ghz (8x multiplier)

Test:
AIDA64 Stability test: CPU / FPU / GPU / Memory

Temperature Results Stressed:
CPU 'package': Average 54C Spike: 74C
Water temps: 29-31 (approx. from 3 water sensors)

Temperatures Idle
CPU idles at 24-25C (BIOS CPU Temp reports 35C idle, although apparently this is normally higher than idle when reported through windows)
Water Temps: 23-24C
Room Temp: 23C
Pumps set to Speed 2



Thank you :)
 
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