topic Re: i7 7700k High temperatures while running AVX instructions in Mobile and Desktop Processors

i7 7700k High temperatures while running AVX instructions

LRibe2 — Thu, 30 Mar 2017 11:06:42 GMT

Hi!

After being discussing this subject a bit off topic on the thread about temperature spikes on the same CPU model, I've decided to open a new thread just to see if I can find a solution or explanation.

After 2 months of testing, I0ve got to the conclusin that my CPU can't handle AVX instructions very well. And this is why:

With BIOS defaults, The CPU can handle any non-AVX workload under 65C, but if I run a stress test with AVX, like intel burn test or prime95, the temperatures rise above 80/85C.

After trying all sorts of configurations, like lower voltages, XMP on or off, AVX offsets, Voltages offsets, adaptive, manual, higher and lower BLCK, the results are allways the same. I can get low temperatures on non-AVX instructions, even under 62C but once again, running AVX blows the CPU up to 85C.

I find this really hard to understand since I dont have any cooling issues.

My Build:

CPU: i7 7700k

COOLER: Cooler master evo 212

CASE: Bitfenix prodigy M with 6 Corsair SP120 Fans - 2 IN / 3 OUT / 1 CPU

MOTHERBOARD: Asus Z270m Prime

PSU: Corsair VS650

GRAPHICS CARD: Gigabyte GTX 1060 WF OC 6GB

RAM:Crucial Ballistix LT 32GB DDR4 2400Mhz @ 1.2V

BIOS Setup and temperatures by now:

OC: Manual

AVX Negative offset: 0

SVID: Disabled

VCORE: 1.21V

MULTIPLIER: 46

PLL voltage: 0.9V

RAM Voltage: 1.2V

RAM freq: 2.4Ghz

Intel speedstep: Disabled

Turbo: enabled

Temperatures:

IDLE: 22C

FULL LOAD non-AVX: 62C max

FULL LOAD AVX: 85C+ (after 1 or 2 minutes I stop the test by the time temps reach 84/85C)

GAMING: BF1 for example: 61C Max

If I turn on the AVX offset down (negative offset 3 or 4) to below stock turbo speeds (4.5GHZ) I can get temperatures, while running AVX, under 77C but this dosent make much sense because even at stock speeds AVX instructions burn the CPU up to 80/83C or even higher, once again I stop the test.

Is there any solution to this issue?

There dosent seem to be any cooling problems because all the other operations work perfectly fine and with good temperatures, even idle is low.

Thanks!

Regards!

Luís

Re: i7 7700k High temperatures while running AVX instructions

idata — Thu, 30 Mar 2017 18:08:08 GMT

Hello OverDriver_PT83,

Thank you for contacting the Intel community.

Please bear in mind that these temperatures for this processor is totally normal and nothing to worry about it, this processor can work under normal work load at 100°C, you can check the TJUNCTION for this processor here:

http://ark.intel.com/products/97129/Intel-Core-i7-7700K-Processor-8M-Cache-up-to-4_50-GHz http://ark.intel.com/products/97129/Intel-Core-i7-7700K-Processor-8M-Cache-up-to-4_50-GHz

I have seeing several customers complaining about this temperature but with this Intel® Core™ i7-7700K Processor this temperature is normal.

Also, when you do stress tests, it is expected that the temperature reaches 85°C or more and then when the stress test finishes it will go back to normal.

If your system detects critical temperature the system will automatically shut down when the silicon has reach an elevated temperature that risks physical damage to the product. At this point, the THERMALTRIP# signal will go active.

We recommend keeping your drivers and BIOS up to date, you should download the driver and latest bios version here:

https://www.asus.com/Motherboards/PRIME-Z270M-PLUS/ https://www.asus.com/Motherboards/PRIME-Z270M-PLUS/

NOTE: This link is being offered for your convenience and should not be viewed as an endorsement by Intel of the content, products, or services offered there.

I hope this can help.

Best regards,

Ivan.

Re: i7 7700k High temperatures while running AVX instructions

LRibe2 — Fri, 31 Mar 2017 08:36:06 GMT

Hi Ivan!

Thank you for your answer.

Well, that being said, I will no longer worry about this temperatures, if up to 85C while running AVX, it's ok.

I hope this dosent reduce the processor's lifespan.

Thank you.

Best regards!