Weird CPU Performance (4790K)

[Damien c]

So I have been having issues with my CPU temps and I was getting fed up with them, so I created a thread asking if people would de-lid my 4790k since the temperatures were just stupid.

I then decided to talk to my dad and see what he thought, and in the end I took the cpu out and popped it in a vice, popped the IHS off and applied some Artic MX4 and reseated the CPU, then applied some MX4 to the IHS and fitted the H100i's Block and booted the pc.

PC booted fine and temps were abit lower, not a staggering amount but 2c per core and the core temps are much closer together.

Prior to de-lidding the CPU I had tried multiple different CPU voltages and the pc would crash with anything lower than 1.3v or the CPU VCore set to Auto, when running OCCT with or without AVX enabled.

After de-lidding the CPU I am now trying different voltages again and have found that, I can now run OCCT with AVX enabled at 1.25v and also 1.18v set in the bios and it runs for over an hour.

I am still testing with different voltages (1.16v) to see how low I can get the voltages with OCCT running with AVX for at least 1 hour before, I then go to trying to run for longer.

So since de-lidding the CPU I am now able to run lower voltages which I couldn't prior to de-lidding which I personally find strange although it could just be a strange coincidence.

Also I have notced that voltages also do not seem to be affecting the temperatures that much.

Ambient room temp 24c with a core voltage of 1.25v the peak temperatures were 80c, with 1.180v the peak temps 76c and now with 1.16v in 4 minutes of testing the peak is currently 73c.

I have some Coollaborty Liquid Pro coming on Tuesday which I am going to put on the Die and then test again.

Cooling is currently a Corsair H100i with 4 Akasa Apache Black's in Push/Pull.

Now the temps still seem high to me, but do you think it's coincidence that the voltages are now being able to run lower and does anyone have any ideas about why the temps are barely dropping?

 

[Damien c]

Changed thread question and I thought the title but the title has not changed.

 

[SPS]

Changed the title for you

 

[Damien c]

Changed the title for you

Thanks

Just as a bit of a update I have been running OCCT with AVX enabled with a Vcore of 1.160v, with XMP Enabled for my ram so it's running at 2400Mhz at 1.65v.

Peak temps are 75c and it's been running for 2 hours and 53 minutes, I am going to leave it to run as long as I can probably till 10pm or I might leave it running all night.

Then tomorrow I will look at the possibility of overclocking it, but iirc I might need to drop the ram speeds as I think I saw somewhere online that overclocking could cause high speed memory to become unstable because of the IMC not being able to cope or something like that.

I don't might dropping the ram down to 1600Mhz if needed as I don't really see much benefit from higher frequency ram in games.

 

[AlienALX]

What clocks are you running the CPU at dude? I did read your thread but can't see anywhere what clocks you have the CPU at.

 

[Damien c]

Sorry the CPU is running at Stock Speed 4.0Ghz but it's always Turbo'd at 4.4Ghz so it rarely runs at 4.0Ghz.

 

[AlienALX]

Blimey I would out that thing faster than Salman Rushdie's butthole goes when the doorbell rings.

Have you not considered going X99? with two GPUs like that I would want a beefy CPU set up.

 

[Damien c]

If I had the money I would, but the cards were bought for me by my dad without telling me till the morning after he ordered them, as a thank you for the years of upgrades he has had off me and because one of the GTX680's that he was running died, but he wanted my GTX 780Ti's.

I am a full time carer for my mum so money is really tight, there is no way at the moment I can afford the £1100 - £1500 it would cost me to go X99 as I would need the following.

CPU (5930K Pref 5960X due to 4K video conversion)
Ram (16Gb to 32Gb)
Mobo (MSI due to previous history with Asus boards)
Waterpump
CPU Waterblock
Tubing
Fluid

Wouldn't need res, rads or fittings as I have enough of them.

I am stuck with what I have at the moment, I just about had enough in my bank to order the TIM from Overclockers, but that has left me skint till the end of the month

I am going to try the new TIM on Tuesday when it turns up, but I am out of ideas at the moment, till I can get the money together to get the bit's I need for a cpu waterloop.

 

[JR23]

Temps seem legit to me for a H100i with four average 1300RPM fans.

JR

 

[Damien c]

Temps seem legit to me for a H100i with four average 1300RPM fans.

JR

It does seem like these are the lowest temps I am going to get at the moment until I get better cooling.

The only wierd thing for me is the lack of a big difference between voltages in terms of temperature, as there is roughly between a 5c to 10c drop when going from 1.312v to 1.160v.

 

[AlienALX]

I'm not sure you would 'need' a 5930k unless you are running two M2 SSDs?

X8 X8 is more than good enough dude. I don't score any less than reviews of the Fury X in Crossfire I have read.

 

[Damien c]

I'm not sure you would 'need' a 5930k unless you are running two M2 SSDs?

X8 X8 is more than good enough dude. I don't score any less than reviews of the Fury X in Crossfire I have read.

It's the CPU Grunt that I would be looking at, as currently it takes 1.4 hours to convert a 15 minute 4K video.

 

[AlienALX]

It's the CPU Grunt that I would be looking at, as currently it takes 1.4 hours to convert a 15 minute 4K video.

The 5820k is identical to the 5930k apart from the PCIE lanes. If you can live with 28 lanes then there's no reason whatsoever to go for the 5930k.

I run Fury X x8 x8 and I get exactly the same results as X16 X16 in the reviews I have read.

 

[barnsley]

It's the CPU Grunt that I would be looking at, as currently it takes 1.4 hours to convert a 15 minute 4K video.

Maybe consider looking at a high clocked x99 xeon then? That or get the 5820k and wait/save for that rumoured x99 super xeon they have in the works.

 

[Damien c]

Maybe consider looking at a high clocked x99 xeon then? That or get the 5820k and wait/save for that rumoured x99 super xeon they have in the works.

Yeah I think I will wait and save as much as I can and then get the best I can based off, what will perform the best for video converting.


As for the temperature issues, I managed to run OCCT last night with AVX enabled for over 7 hours before I turned the pc off.

Today I managed to get my hands on the stuff I needed to get a custom loop done, and the temps have dropped although I need to let it run longer but up to now there is a 6c drop.

 

[Damien c]

Update for you.

I have received the Coollaboratory Liquid Pro and applied some to the Die, and used some Clear Nail Polish over the little bits next to the die, I cannot remember the name of them I think it's power regulators or something like that.

I then used some Noctua NT-H1 on the IHS between that and the EK Waterblock.

Booted up the PC and loaded OCCT with CPU-Z, Core Temp and Real Temp and turned on OCCT with AVX enabled and the max Core Temps are now 60c so a full 10c drop, just by using the Coollaboratory Liquid Pro on the Die compared, to Artic MX4 on the Die and Noctua NT-H1 between the IHS and the block.

Happy with the temps now, and I can look at overclocking soon.