Intel Haswell Overclocking Clubhouse.

[Toothless]

Try increasing system agent voltage. For me that has really helped my chip do 4.6. I could go higher I think just haven't tried. I used to need like 1.3v to do 4.4, but now with system agent voltage at 1.06, I can get 4.4 at 1.275, maybe even 1.25.

Also 60-70 degrees is nothing to worry about with these chips.

EDIT: Oh you have a 4790k...

I have the problem child.

So this happened.

Gaming is same temps as previous volts/clocks but I do get spikes in temps when I load something.

 

[mlee49]

So I've been out of the overclocking game for a while and finally got around to working on my system. Couldnt OC it for anything, no matter what. Finally broke down and opened it up to find the damn XMP switch was turned on. So frustrating

Switched it off, rebooted into the Bios and booted at 4.4GHz. Hot damn, feels good man.

 

[Toothless]

So I've been out of the overclocking game for a while and finally got around to working on my system. Couldnt OC it for anything, no matter what. Finally broke down and opened it up to find the damn XMP switch was turned on. So frustrating

Switched it off, rebooted into the Bios and booted at 4.4GHz. Hot damn, feels good man.

I should turn off my xmp, probably, maybe...

 

[TheHunter]

Well for my Z87deluxe mobo beta 2003 bios really does some magic, ram OC is still at xmp 2400MHZ CL10 1T and no issues.,

Unlike with 2004 or 2103 - both made 2400MHZ completely unstable, had to revert back to stock 2133MHZ with these two..
heh Asus mentioned optimize overclock and improve system performance by both, yea right



Using this "a little lower" OC for a while..
4.6GHZ @ 1.234v
4.2GHZ cache @ 1.15v
LLC7, cpu current 120%, vrm Extreme (using onboard igpu for quicksync), ram current 120%, ram vrm optimized
system agent 0.045V+ offset
vccin 1.79v
blck 6ohm for 100.29MHZ blck, making my cpu OC at 4601MHZ, instead of that occasional 99.8MHZ "glitch".






And it OC's like at day one when I first got it almost 3 years ago, uff time flies by

 

[Kursah]

Well I'm still on 2103 atm...but am tossing around flashing back to 2003 beta.

I've been messing around with OC-ing my current 4790K which replaced my 4770K that was donated to another build. I had underclocked it to -.070v and ran it for some time. I found I could run 4.5GHz at that setting as well, at least for initial OCCT CPU testing, 1.14v played nice. I thought that was pretty sweet. So now I gotta see how far the rabbit tunnel goes...

I slapped a second fan on my U14S for push-pull, which brought the temps down a little further, migrating to the Corsair 600C helped as well (even on the lowest fan speed!).

Next I tried 4.6, which is achievable around 1.16v, again I ran about an hour's worth of CPU testing in OCCT, it passed I moved on deciding 4.7 is a goal. I can boot and do short term stress testing at 1.18-19v, and longer CPU-only testing at 1.207v (-.005v). So I'm still a touch undervolted running now...which is pretty cool and I was hoping to keep it that way.

Running OCCT's PSU test brings up new issues, I had to set LLC to 8 in order to prevent reboots/crashes during the stress test. Now its good for about 20 minutes in the PSU test before erroring. It doesn't state what error, but I know it's CPU-related.

My cache/ring is running stock 40X and stock 1.16v. Both are left on auto and I have monitored them, though I plan to manually enter their values at some point just to see if any changes can be documented...thus far Intel XTU and HWMonitor show no variances. About the only other changes I have is that I'm running with power savers all enabled, as I prefer to idle when my PC is idle or low load when I don't need full power and I'm running the XMP profile for my 1866 DDR3...I may mess with it later to see if I can get any extra speed out of them...but right now I want to get 1-hour stable in OCCT's PSU test at this point.

I haven't increased or changed any other voltages... CPU input voltage is 1.712v and it floats between that and 1.724v as reported by monitoring tools. I think that I'm still within safety limits of not needing to increase that but maybe not... I'm adding notes and thoughts here as I go.

I will say this CPU surprised me a bit with the OC's it is able to achieve at below stock VID, I may settle on 4.6, but hoping I can make 4.7 work and maybe chase 4.8 later on just to see where it would end up at.

 

[Kursah]

So I'm going to use this thread as my mini-OC log since its relevant.

I stuck with 2103, I wanna see what I can do..and not running uber fast DDR3 probably helps...but I'm curious to see what these Crucial 1866's can do...it'd be sweet to hit 2133 without much effort...lol.

So LLC is at 8, voltage set to stock VID, 1.21v. OCCT PSU test stable 1+ hours over the span of the afternoon/evening. Decided to download and run the Asus ROG Realbench 2.4.2...it lasted about 20-50 minutes on 1.20v, and am running a 1-hour on 1.21v.

Temps maxed at about 80C including the GPU. Not bad for low fan speed on case fans...cooler than my old case could've done with no CPU OC and higher fan speeds. Pretty damn happy overall, and my system is much quieter, cooler, and now OC'd. Snagged an extremely good deal on a 980Ti which should be here soon to retire my GTX 770...never OC'd it...doesn't look like I'll do so either.

I did manually set cache min/max 40, manually set stock voltage. Set CPU INV to 1.70v (reads 1.712 idle, 1.728 load, just as Auto did). They didn't seem to change anything...I may let it go back to auto for some A|B.

So I have one complaint...I am able to run around -.070 for stock to a minor OC. It'd be nice if Adaptive would all subtracting from the standard voltage, and add to that subtracted value for the turbo voltage... because I could really do much better tuning for when that voltage is more necessary. Not that it really makes a difference...when I can idle at .650 vs .720, it's just an OCD annoyance more than anything. I hope that future voltage control on or off-CPU becomes more granular. I did really appreciate the extra CPU voltages that I have needed to use.

I feel like I'm about good on stability for 4.7GHz...can I get 4.8 at 1.25v or less?

Stock -> 4.5 @ 1.14 (undervolted .070v), 4.6 @ 1.16 (undervolted .050v), 4.7 @ 1.21v (stock VID), 4.8 @ ???

Judging from the current steps...I'm gonna say no. I'm fine with that...I'm honestly thinking I'll go back to 4.6, mayyybe even stock when its all said and done. More to come!

 

[Kursah]

Well I am a dumbass and had to relearn about adaptive settings because it had been a while since I OC'd my last Haswell processor with this much tuning.

But turns out I can undervolt and add adaptive for turbo. So now I'm running a -.070 offset, which applies during the normal clock range, 800-4000, so I get my stable and lower .650v idle and 1.14v at the top. Then once turbo kicks in, I set it it to 1.285v, and get 1.215v (as .070 is taken away from that as well...). I forgot with the adaptive setting it's not how much you add or remove...it is the value you want. Sigh...but I got it sorted. I'm doing this testing on 4.7, which needed a little more than the 1.205 that I was giving it initially (at this point at least).

I was able to get my RAM up to 2000, I relaxed the big for from 9-9-9-27 to 10-10-10-32 for testing. Goal is 2133..which I realize is low but I'm not sure what this kit of Crucial is capable of yet...

Got 4.8 mostly stable at 1.26v last night...was OCCT stable but didn't pass Asus Realbench...came close tho. Max core temp was 83C. I'm not convinced I need 1.26v yet...but stability was spotty at 1.25...though it was 1.251 to 1.262...so I'm just nitpicking a few thousandths of a volt here lol. But it's been fun to do this again on my own rig.

Monitoring measured power consumption in HWMonitor (however (in)accurate it may be..)dropped idle load bit time with the changing of the 40X cache min multi to 8X. I also was able to undervolt the cache by .015v at this point with 0 issues. I don't know if or how far I'll try to push the cache..fwir its gains are tough to notice so we shall see...the core is what I wanted to OC to a decent level and be able to keep it on air, and kick up the RAM a little bit.

Still on 2103 too...been pretty damn good though I don't have or plan on high memory clocks so I might be okay... we shall see.

 

[TheHunter]

Nice chip, Im stuck at 4.7Ghz, one time I remember testing it at 1.25v, but guess it was a 2133mhz thing, when I moved to 2400mhz ram OC I had to use 1.280v min.. Or was it earlier bios thing.
4.8ghz I already need 1.325v or so, kinda overkill

 

[Toothless]

So I need a better cooler (as I've probably complained multiple times before unknowningly)

Stable! For now...

I'm limited by the thermals. OCCT will push it over 90c on all cores however it'll run 60-70c on normal-high loads. Curse this cooler.


EDIT: It actually needs 1.32v.

 

[Kursah]

Well I ended up settling on 1.261v for 4.8 on my chip to keep it stable and my cooler seems to handle it fine. Still fine tuning a little bit...but I think I've about found the sweet spot. Now gonna tune the RAM, in initial tests I had this 1866 up to 2133 and had relaxed the timings to 10-10-10-35. Gonna try keeping the stock CL9 timings and upping to 2133.

I'm leaving the cache at 8x-40x...and on that note, if I didn't mention it before did this on my server CPU too...I save about 7-10 watts during idle/low load.

So as it sits,

CPU vcore - Adaptive voltage, -.070 for offset (stock clock undervolting), 1.330v for adaptive voltage to apply during turbo mode, which subtracts the offset and allows for 1.261v at load and .650v at idle.
CPU Input V - 1.70v, planning to turn EPU back on...as it defaults to this and saves some more power...might as well see what I can turn on and keep stable. Still not done testing at 1.65v tho...but EPU must be disabled for changing this voltage to take effect...lesson re-learned.
Memory - XMP, 1866, CL9, 1.5v.
I'm not chasing high memory OC's either, 2133, maayybe 2200 if this memory can handle it....but this is more for fun atm...I'll likely drop back down to 1866 unless I can verify a change in games.
Asus power settings to optimal.
BIOS - 2103, I tried 2003 beta and had worse stability.

I have most power saving settings enabled at this point, Asus power settings to optimized, LLC on auto. I tried a lot of manual settings and have since put a lot of them back on auto.

I must say this system is fast, I'm extremely happy with the OC too. I have debated dropping the CPU OC which I will eventually...but I feel pretty good for accomplishing 4.8Ghz on air right now.

 

[Toothless]

So cooling isn't an issue anymore, the issue now is voltage. Not sure how high I can push it since I can't find the "safe" 24/7 voltage cap. I saw on here that it's 1.325v but I'm sure 1.4v would let me to the 4.8ghz throne.

 

[Shou Miko]

So cooling isn't an issue anymore, the issue now is voltage. Not sure how high I can push it since I can't find the "safe" 24/7 voltage cap. I saw on here that it's 1.325v but I'm sure 1.4v would let me to the 4.8ghz throne.

Have u consider delid ur i7?

I seen a lot of users doing this and not only getting better temps but been able to overclock higher at the same voltage.

 

[Toothless]

Have u consider delid ur i7?

I seen a lot of users doing this and not only getting better temps but been able to overclock higher at the same voltage.

I'm not risking a $300 chip, nor do I have the equipment to delid it. Those people can do as they wish but I'm not going to do it.

 

[Shou Miko]

I'm not risking a $300 chip, nor do I have the equipment to delid it. Those people can do as they wish but I'm not going to do it.

hehe, what r ur temps around the vrms using an aio? ppl sometimes forget that u don't have an active airflow around having a waterblock on ur cpu.

 

[Toothless]

hehe, what r ur temps around the vrms using an aio? ppl sometimes forget that u don't have an active airflow around having a waterblock on ur cpu.

Not hot enough to cause issues.

 

[TheHunter]

So cooling isn't an issue anymore, the issue now is voltage. Not sure how high I can push it since I can't find the "safe" 24/7 voltage cap. I saw on here that it's 1.325v but I'm sure 1.4v would let me to the 4.8ghz throne.

Depends, if it goes in ~ 0.06v steps by each 100Mhz bump like by mine if I go over 4.5Ghz, then you're looking at ~ 1.38V @4.8GHz. But I would say "safe" is stay at 1.35v or lower..

Maybe you can try per core OC
2core 4.9Ghz,
3core 4.8Ghz,
4core 4.7Ghz..

could be doable with max 1.38-1.43V, but anything over 1.4v is a bit tricky unless you use C3, C1E, eist and adaptive voltage (adaptive only after stable oc).

 

[FYFI13]

http://valid.canardpc.com/4dyzsv

One of my first OC'ing attempts with this CPU, like a year and half ago right after buying it.


Edit:

FYFI13|4790K|1.216/1.2|4998MHz(50x100)|1.45V|x40(4000MHz)|2133MHz|Corsair H60|Asus Z97M-Plus, no OC on RAM

 

[Toothless]

Depends, if it goes in ~ 0.06v steps by each 100Mhz bump like by mine if I go over 4.5Ghz, then you're looking at ~ 1.38V @4.8GHz. But I would say "safe" is stay at 1.35v or lower..

Maybe you can try per core OC
2core 4.9Ghz,
3core 4.8Ghz,
4core 4.7Ghz..

could be doable with max 1.38-1.43V, but anything over 1.4v is a bit tricky unless you use C3, C1E, eist and adaptive voltage (adaptive only after stable oc).

I'll try 1.35

 

[cadaveca]

Forgot I was the one keeping the list here. Anyone else want an addition to the rankings, let me know.

FYFI13|4790K|1.216/1.2|4998MHz(50x100)|1.45V|x40(4000MHz)|2133MHz|Corsair H60|Asus Z97M-Plus, no OC on RAM

 

[Schmuckley]

Needs to be a "Haswell died on me @ daily clocks" clubhouse.

 

[Toothless]

So I wonder if since the only changes I was making is core voltage and clocks, wasn't I supposed to change cache stuff and power states too?

 

[cadaveca]

So I wonder if since the only changes I was making is core voltage and clocks, wasn't I supposed to change cache stuff and power states too?

Cache, yes, a bit. Power states? NOPE.

 

[Toothless]

Cache, yes, a bit. Power states? NOPE.

Highest safe cache voltage?

 

[cadaveca]

Highest safe cache voltage?

Depnds on cooling. Maybe you should read my Haswell OC guide...?

http://www.techpowerup.com/reviews/Intel/Haswell_OC_Guide/1.html

 

[Toothless]

Depnds on cooling. Maybe you should read my Haswell OC guide...?

http://www.techpowerup.com/reviews/Intel/Haswell_OC_Guide/1.html

Followed it and got 4.7 easily. I gotta see if I can get a spot fan or something for the VRMs since now that's holding me back.