Temps for i7 4790K

[vMax65]

Hi all,

First i'm a newbee... and a bit apprehensive as I have started to overclock. I am getting temps of around 30 degrees in idle and 65 degrees at 100% utilization in AIDA64 and in Prime95 I max out at 82 Degrees. Does this seem a bit to high based on my configuration below.

Asus Maximus Hero VII all bios setting at auto except for Core voltage which has been set to manual and dropped to 1.13. Processor running at 4.4GHZ

I have a corsair AIR 540 case with 3 fans pulling air in from the front and a Corsair H100 in push/pull chucking air out of the case and a rear fan also extracting air. Ambient temps outside the house is 22 degrees. Should I be getting better/lower temp values?

I may just be fretting over nothing as my 2600K ran cooler at 4.4ghz than this and idle was in the 20's.

Kind regards,

vMAx

 

[GLeeM]

Which version of Prime95? If it is the newest v28.5 and you used the Small FFTs torture test and ran it for at least 5 minutes, then it is good!

For example, I have mine set manual all cores at 4.5GHz with vcore 1.255.
Corsair H110 with push into the case. Temps with P95 v28.5 Small FFTs are 90-94C after ten minutes with 24 ambient.

 

[tidy]

.

 

[ShintaiDK]

Remember to disable the mobo "multicore enchancement" or something similar.If its on it will OC turbo modes and apply a healthy bit of vcore on top.

 

[tolis626]

Remember to disable the mobo "multicore enchancement" or something similar.If its on it will OC turbo modes and apply a healthy bit of vcore on top.

May I ask why? I have multicore enhancement enabled and haven't had any problems with my 4790k at 4.7GHz/1.305V. Prime95 smallFFTs, LinX and Linpack all still kill my H110 though.

 

[tolis626]

Damn, double post. Something is wrong either with the forums or with my home internet today...

 

[coffeejunkee]

It's not relevant in this case since OP set vcore manually. And it's not relevant in your case since you also set vcore + multipliers yourself.

It is relevant when you are wondering why your stock cpu under stock cooler is throttling (mainly because with mce enabled the mobo increases the vcore).

Seems to me temps are normal. 4790K still gets hot despite improved tim. Could also be mounting issue with H100, but I think you would see higher temps. Doesn't hurt to search around, plenty of ppl using washers with H100 (strange how every review never runs into that kind of trouble btw).

 

[vMax65]

I have changed the volt within AI Suite to 1.136v and have tested with Core Temp which shows the processor running speed at 4.4ghz and voltage currently live at 1.1378v. Along with this I have AIDA64 stress tested CPU at 100% for 2 hours and now temps do not go over 63 Degrees. In Prime 95 I am not going over around 73 Degrees though I have not let it run for a long time as I hear conflicting reports as to 4790K Haswells not being good for the latest version of Prime 95 though it has done the major small fft attack which I can now survive.

I did test lower voltages but it would not pass AIDA64 or Prime 95 below 1.136 volts... computer shuts down and restarts. At 1.136 everything runs fine.

Biggest change that I think made the difference is that I have re-seated my H100i cooler with some plastic washers (Thanks CoffeeJunkee) and MX-4 TIM and it has made a difference at the top end by a few degrees. Also one core always seems to be about 5 degrees cooler than the others but I think this is normal after reading a few forums.

Thanks for all your thoughts as it seems to be running OK now, the re-seating and especially plastic washers seemed to help big time and the fact that the 4790K just runs a bit hotter than my old 2600K

 

[tolis626]

It's not relevant in this case since OP set vcore manually. And it's not relevant in your case since you also set vcore + multipliers yourself.

It is relevant when you are wondering why your stock cpu under stock cooler is throttling (mainly because with mce enabled the mobo increases the vcore).

Seems to me temps are normal. 4790K still gets hot despite improved tim. Could also be mounting issue with H100, but I think you would see higher temps. Doesn't hurt to search around, plenty of ppl using washers with H100 (strange how every review never runs into that kind of trouble btw).

Yup, seems I misunderstood what Shintai meant. It just seemed strange at first glance. Thanks for clearing that up.

I think the whole washer thing applies to the H100/H100i. The H110 is a typical Asetek AIO, like the NZXT Kraken series etc. The mounting hardware isn't the most convenient, neither of the highest quality, but it gets the job done if mounted properly.

@vMax65

MX-4 is awesome. I installed the stock cooler again with MX-4 after I had it installed with its stock TIM and I got like 10C lower temperatures. Plus, it spreads better (more evenly), isn't conductive, isn't too expensive... What more can one ask for? Just be careful not to put too much of it.

 

[vMax65]

Yep agree on the MX-4 it is excellent... just used the super small pea method and it seems to have done the trick. The washer on the H100 has made a huge difference as there was always movement between the backplate and the bolts/screw thingy's that the plate sat on.

Also I have finally managed a proper Prime95 test at 4.4GHz with 1.1699v finally stable but reaching a mindnumbing 83 degrees but at least I got through it this time. AIDA64 never seems to go over around 69 Degrees all day long. Will push to 4.5GHZ and see if I can keep below 1.2V...

You guys can probably tell I am very new to this but now have the bug to push the processor at the lowest v's

 

[BonzaiDuck]

Yep agree on the MX-4 it is excellent... just used the super small pea method and it seems to have done the trick. The washer on the H100 has made a huge difference as there was always movement between the backplate and the bolts/screw thingy's that the plate sat on.

Also I have finally managed a proper Prime95 test at 4.4GHz with 1.1699v finally stable but reaching a mindnumbing 83 degrees but at least I got through it this time. AIDA64 never seems to go over around 69 Degrees all day long. Will push to 4.5GHZ and see if I can keep below 1.2V...

You guys can probably tell I am very new to this but now have the bug to push the processor at the lowest v's

Someone can correct me: I'm assuming Haswell "refresh" involved the replacement of the "old" Intel TIM with a new "polymer" TIM. Under those circumstances, I agree -- seems normal.

AIDA64 and PRIME95 don't push the thermals to the max: you have to use something like IntelBurnTest or LinX. PRIME is "limp" on my SB-K @ 4.7. I think the maximum temperatures were mid-50's C, and I use an NH-D14.

Whatever stressor you use, find the minimum, then bump up the settings that affect "turbo" voltage a couple notches. It's important to find the minimum, but it's also important to give yourself a little "Lebensraum."

 

[tolis626]

Someone can correct me: I'm assuming Haswell "refresh" involved the replacement of the "old" Intel TIM with a new "polymer" TIM. Under those circumstances, I agree -- seems normal.

AIDA64 and PRIME95 don't push the thermals to the max: you have to use something like IntelBurnTest or LinX. PRIME is "limp" on my SB-K @ 4.7. I think the maximum temperatures were mid-50's C, and I use an NH-D14.

Whatever stressor you use, find the minimum, then bump up the settings that affect "turbo" voltage a couple notches. It's important to find the minimum, but it's also important to give yourself a little "Lebensraum."

Yup, that's what happened with Haswell Refresh. They just replaced the TIM under the IHS and added a few capacitors. Nothing too fancy.

Depends which Prime95 version you use. 27.9 doesn't output the maximum heat. 28.5 kills most cooling solutions on an overclocked Haswell. About the only thing that's worse than Prime95 28.5 is AVX2 Linpack and LinX. And believe me when I say, you don't want to use those unless you have a balls to the wall water cooling loop (I wouldn't use them even then, to be honest). Prime95... I wouldn't use it on anything short of a NH-D14 class heatsink or an AIO with at least 2 120mm fans. And even so, I wouldn't suggest it, other than seeing quick and dirty results (10 minutes ought to discover most instabilities). To test for any amount of time, I'd say look elsewhere. AIDA64 and OCCT are my choices.

 

[tweakboy]

Give her stock clocks and let us know if you still have this issue.

 

[coffeejunkee]

Well, on the topic of stesstesting, allow me to share my small n=1 sample size results by means of a small table which shows the offsets required for stability at different frequencies. First Linx stable, then really stable with the difference in parentheses.

Linx 20 runs stable

4.0 -0,075
4.1 -0,055
4.2 -0,025
4.3 +0,015
4.4 +0,045
4.5 +0,105

Really stable

4.0 -0,035 (+0,040)
4.1 -0,005 (+0,050)
4.2 +0,020 (+0,045)
4.3 +0,065 (+0,050)
4.4 +0,120 (+0,075)
4.5 +0,165 (+0,065, also need to disable C3/C6)

So yeah, if you ask me I will tell you stresstesters like Linx (and others, I used pretty much every stresstester available + a few more) are utterly useless, at least for SB/IB cpu's (they did work quite well for core duo and lynnfield cpu's I had before). I determined real stability by playing games while running video/music in the background.

 

[Burner27]

It's not relevant in this case since OP set vcore manually. And it's not relevant in your case since you also set vcore + multipliers yourself.

It is relevant when you are wondering why your stock cpu under stock cooler is throttling (mainly because with mce enabled the mobo increases the vcore).

Seems to me temps are normal. 4790K still gets hot despite improved tim. Could also be mounting issue with H100, but I think you would see higher temps. Doesn't hurt to search around, plenty of ppl using washers with H100 (strange how every review never runs into that kind of trouble btw).

CoffeeJunkie,

I am using an Asus Maximus VII Gene mobo and I am experiencing the throttling you speak of. If i run Prime95, my CPU shoots up to 88c, then it throttles, but stays at 88c. I am using the stock cooler and my voltage is always 1.264. I could use your guidance on this please.

Thank you

 

[coffeejunkee]

Ok, 1.264 is way too high for stock vcore. It should be something like 1.050. I would go into the bios and check all settings under the AI tweaker tab. Make sure multicore enhancement is turned off and that turbo ratio is set to auto. Use cpu-z to make sure your cpu is running at 4.2 and not 4.4 GHz on all cores (assuming you have 4790K).

Throttling at 88C is strange though, iirc it should be 99C for Haswell cpu's.

 

[Burner27]

Ok, 1.264 is way too high for stock vcore. It should be something like 1.050. I would go into the bios and check all settings under the AI tweaker tab. Make sure multicore enhancement is turned off and that turbo ratio is set to auto. Use cpu-z to make sure your cpu is running at 4.2 and not 4.4 GHz on all cores (assuming you have 4790K).

Throttling at 88C is strange though, iirc it should be 99C for Haswell cpu's.

Did i do any damage running it at 1.264v?

I made the following changes:

MCE off
AI Overclock Tuner set to XMP
Internal CPU Power Management was set to Manual Mode Enabled. I set it to disabled and set the voltage to auto.(1.040v)

I now see the voltage change with the frequency of the CPU changing. When it hits 4GHz, it shoots up to 1.168v.

Is that better?

 

[vMax65]

Finally found a solution from NBSeen on the ROG forums

Resetting the bios settings to default and letting the bios (auto) handle Vcore seems to have made a huge impact. Not exactly sure what is really going on but will start to learn more and take things slowly. After defaulting everything the core i7-4790K is running at 4.4ghz and idleling at 25 degrees and 62 degrees max in prime95 for 1 hour... Before in Prime95 it was hitting 80 degrees plus. My changing the vcore to manual and dropping it first to 1.136 and then 1.168 was obviously not a good idea as the temps went through the roof. Letting the board handle vcore in auto seems to have made a huge difference.



Will start to overclock now but being a super noob will take it slow...

 

[vMax65]

A big thank you to all you guys out there... had been pulling my hair out trying to work out why things were running to hot... to be honest i still do not know why temps are so much better now i.e 26 Degrees in idle and under 62 Degrees in Prime95... before i reset the bios back to auto on vcore the i7-4790k was running way too hot 80 + in prime95. Maybe someone can explain exactly why when i manually reduced the vcore the temps went up and in auto it runs super cool...

 

[coffeejunkee]

Did i do any damage running it at 1.264v?

I made the following changes:

MCE off
AI Overclock Tuner set to XMP
Internal CPU Power Management was set to Manual Mode Enabled. I set it to disabled and set the voltage to auto.(1.040v)

I now see the voltage change with the frequency of the CPU changing. When it hits 4GHz, it shoots up to 1.168v.

Is that better?

No damage at all, I meant way to high as compared to what a really stock cpu should be running at.

1.168 still seems a bit high but that's probably because Haswell cpu's use extra voltage under AVX loads like Prime. Use something like Cinebench to get a better idea of real world load voltage.

 

[asendra]

Sorry to hijack the post, but I'm trying to OC my 4770K after more than 8 years without messing with this things.

I've got a basic 4.3 (100mhz base clock, 43 multiplier) with 1,175v of core, which I've gathered is not a lot of voltage, I have margin to go higher.
CPU Cooler is a H90, temps at idle are 30º, at full 65º-68º.

The problem I'm facing is no matter how much I increase the vcore (I've tried up to 1,3v) I can't get a stable 4,4 OC. I find it odd because I though when I got that 4.3, that I still had margin to go higher. Is it normal?

All the voltages are set manually in the bios, and I have turbo boost disabled. I haven't touch anything regarding memory.

 

[Burner27]

No damage at all, I meant way to high as compared to what a really stock cpu should be running at.

1.168 still seems a bit high but that's probably because Haswell cpu's use extra voltage under AVX loads like Prime. Use something like Cinebench to get a better idea of real world load voltage.

Ran Cinebench and got 1.168v under load.

 

[BonzaiDuck]

Yup, that's what happened with Haswell Refresh. They just replaced the TIM under the IHS and added a few capacitors. Nothing too fancy.

Depends which Prime95 version you use. 27.9 doesn't output the maximum heat. 28.5 kills most cooling solutions on an overclocked Haswell. About the only thing that's worse than Prime95 28.5 is AVX2 Linpack and LinX. And believe me when I say, you don't want to use those unless you have a balls to the wall water cooling loop (I wouldn't use them even then, to be honest). Prime95... I wouldn't use it on anything short of a NH-D14 class heatsink or an AIO with at least 2 120mm fans. And even so, I wouldn't suggest it, other than seeing quick and dirty results (10 minutes ought to discover most instabilities). To test for any amount of time, I'd say look elsewhere. AIDA64 and OCCT are my choices.

I used LinX with the AVX enhancement our colleagues were using to test the Sandy Bridge cores. At 4.7, room-ambient in the high 70's F, with NH-D14 and a special application of an AP-30 fan with an acoustically deadened ducting mod, my average of four cores is about 72C.

Ivy and Haswell are a different ball-game because of the die-shrinks and the reliance in a TIM versus indium solder. Throttling at 88C is still discouraging, the overclocks people mention here are discouraging.

If I build a Haswell-E next year, I'll pick a water-cooling kit that is more "custom" than an AIO. I'm still assuming that the E processor still deploys indium solder . . . On the other hand -- 140W TDP?!! Yikes!!

 

[Nomy61]

Hi guys imnew here but found this forumwhile i was doing a search about this i7 4790k pleasure to meet yas
Any ways i just upgraded my system from i7 2600k and maximus v to i7 4790k and asus z87.At first would not post due to bios needed updating.After that things were ok.my system is liquid cooled using dragoon fluid. had a boot issue after that where it kept sending me to bios cause it did not see a cpu fan so i disabled that and loaded optimizing bios setting. My ambient temp in my basement bout 22-24.My cpu was running temps around 45-50 at idle then i went into a game and my temps went up as high as 92.after reading this forum,i disabled multicore enhancement and that reduced my idle to 32-34 but im sure with the cooling system i have this should be lower.Im also using indigo XS thermo system.is there anything else i can do other than resetting the cpu and block ?

 

[coffeejunkee]

Ran Cinebench and got 1.168v under load.

Still seems a bit high to me considering my 3570K uses between 1.048 and 1.072 during Cinebench. But if your vcore is on auto and the correct turbo multipliers are applied then it is what it is.

Could also very well be the case that Intel increased vcore a bit for 4790K, after all it's clocked pretty high. Search around a bit on oc forums to try and find out what the average stock vcore for a 4790K is if you want to be absolutely sure.