i5-750 temp issues

[Evilclive]

I was thinking the other day that i wanted to overclock my cpu so i decided to see what my load temps were(i always just looked at the idle temps for it not really bothering to do load temps) and noticed that it was hitting around 80c with a prime95 test after only a couple minutes.

I ran Everest to see what my cpu fan RPM was at and noticed it never went over 2000 RPM(usually stayed at 1600RPM even though 2800RPM is the max). So i went into bios and turned off automatic fan control and it sits at about 2600 rpm.

With automatic fan speed shutoff the idle temps are 32c and load are at 68c sometimes hitting 70c for a brief time. After sometime of doing the prime95 test the cpu fan speed will increase to 2800RPM.

My problem though is the fan is real loud with automatic fan speed turned off but with it on it never speeds up and the cpu starts overheating...why is this? Shouldn't the sensor know that the cpu is getting too hot and increase the fan speed more? Why does it stay at 1600-1800RPM when its at 80c!!!?

P.S. Im using the stock fan that came with it and have it at stock speeds.

 

[Fumz]

... With automatic fan speed shutoff the idle temps are 32c and load are at 68c sometimes hitting 70c for a brief time. After sometime of doing the prime95 test the cpu fan speed will increase to 2800RPM.

My problem though is the fan is real loud with automatic fan speed turned off but with it on it never speeds up and the cpu starts overheating...why is this? Shouldn't the sensor know that the cpu is getting too hot and increase the fan speed more? Why does it stay at 1600-1800RPM when its at 80c!!!?

P.S. Im using the stock fan that came with it and have it at stock speeds.

With the stock heatsink and fan, load temps of 70C are normal for the i5-750. If you want lower temps and quieter cooling, you should invest in an after market cooler.

I use a Thermalright VenomousX, Shin-Etsu X23 and a Scythe S-Flex 120mm fan (which hovers ~ 1200 rpms). Idle temps are in the high 20's, load temps are 49-52C, and more importantly, the machine is almost silent.

 

[Evilclive]

That will be a problem unfortunately, i haven't done any measuring but i have a micro atx motherboard and my video card and Ram are only a few inches away from the CPU, is there a aftermarket cooler that would fit?

 

[Fumz]

Don't quote me without any dimensions to work with, but you might want to see if a Thermalright XP 120 would work? It's a low profile heatsink that, turned the right direction, would not get in the way of your card or your RAM... hopefully.

You can also check to see if you can fit a Corsair H50? I know the cpu mount would be fine, but would you have enough room for the radiator... that's the real question?

 

[Hipster Doofus]

If you want to slow the fan down & have it speed up as the temp goes up try Speed Fan. It's not difficult to set up. Keeps an eye on temp too.

 

[Evilclive]

If you want to slow the fan down & have it speed up as the temp goes up try Speed Fan. It's not difficult to set up. Keeps an eye on temp too.

I have tried using speed fan but i cant seem to get it to work. It shows my fans in my computer but when i adjust percentages the RPM doesnt change. Am i just doing something wrong? The program seemed pretty straight forward but you never know lol

 

[Hipster Doofus]

Go to 'configure' then 'temp, highlight 'system' then configure the temp. Then go to 'speeds', highlight Speed01 then set the values.

Have a play with it but be careful. As you make changes listen to what is going on & watch your temps.

 

[Evilclive]

Under temp there is

CPU
Local
Remote 2
HD0
core0
core1
core2
core3

Which one do i change?

Edit: On the main page it has speed1 speed 2 and speed 3 showing 100%. Taking down the percentage does nothing it seems.

 

[Hipster Doofus]

Not sure. Nothing is as simple as it should be.

On the main window see if you can figure out what one is doing what. That's how I sorted mine out. Watch the speed as you lower the fan.

 

[Evilclive]

Is there a BIOS setting that would prevent this program form working? I have automatic fan control turned off in BIOS.

 

[Digerati]

With the stock heatsink and fan, load temps of 70C are normal for the i5-750.

I am afraid I have to disagree with that. Got a link? Professional reviews that I am finding mention nothing about high temperature issues - in fact, they mention good temperature control, even when overclocked. I note this Guru3d review where the maximum temp they got under 100% load was only 52°C.

Any thing over 60°C is too high for me and if not overclocking indicates you have other problems, such as a poor application of thermal interface material, or insufficient case cooling.

Also note that according to the Intel warranty (AMD is the same), if that is a retail version of the CPU and it came supplied with a heatsink fan assembly, using any cooler besides the one provided VOIDS THE WARRANTY!! Not a problem if you don't care, but it is something everyone should be aware of.

 

[Fumz]

Hot is a relative term. What's "hot" for one chip isn't necessarily hot for another. Yes, I don't like my chips to go over 50 too, but that's more of a personal peeve than anything else as it pertains to the i5's.

Intel states that the thermal max for the i5-750 is 95C, so "hot" for an i5-750 would be in the 80's and up. Intel® Core™ i5-750 Processor (8M Cache, 2.66 GHz) with SPEC Code(s) SLBLC

About that guru3d article you linked:

[FONT=verdana,geneva]This was done with a Thermalright MUX 120 air based cooler. Of course results will vary with different motherboards and cooling solutions. But as a baseline the temperatures definitely are promising, especially with overclocking in mind.[/FONT]

It's important not to omit the fact they're using one of the best third party air coolers ever made. Secondly, guru no longer does thermal tests in cases; instead, they've got some fancy smancy new setup thats supposed to give more accurate readings of just the cpu. I like the way they do it, however, in reality, the ambient air temp inside your case is going to always be a factor, and this value changes from case to case.

I'm not sure where you're looking, but I can't find a single i5-750 review, or forum post, using the stock cooler that doesn't show ~70C as being perfectly normal... and according to Intel, perfectly safe.

Two examples of reviews:
Intel Core i5-750 and Core i7-870 Processors - Temperature Testing - Legit Reviews
Intel Lynnfield Core i5-750 & Core i7-870 Processor Review - Page 20
In this second link, they show a side-by-side of the stock cooler vs the MUX 120.

Just a few of hundreds of pages of i5-750 guys on stock coolers asking the very same question:
http://www.sevenforums.com/hardware-devices/76687-intel-core-i5-750-temps.html
Temperature Issues - i5 750 - Overclock.net - Overclocking.net
[Solved] Intel i5-750 [CPU Temperature] - Cooler-and-Heatsinks - Overclocking

On a personal note... for giggles, I ran the stock cooler just to see if temps really were that high before I slapped on my Thermalright; they were that high.

Lastly, and this is very important: using a third party cooler does not void the warranty. Heatsinks do not come attached to cpu's. You can use any third party cooler you wish.

 

[Digerati]

I concede you are right that that CPU runs hot when stressed, but you are incorrect when you said,

Lastly, and this is very important: using a third party cooler does not void the warranty. Heatsinks do not come attached to cpu's. You can use any third party cooler you wish.

Note I did not say "attached" I said CPUs that come "supplied with". I run into this arguement so often I created a canned text with the proof right from Intel and AMD warranty pages:

It should be noted that using a 3rd party cooler on retail (not OEM) versions of Intel and AMD CPUs that come with heat sink fan assemblies voids the warranty!!! And damage attributed to overclocking is not covered under any CPU, motherboard, or cooler warranty either, regardless any overclocking features or software provided by motherboard makers. Certainly, this is not a concern for some enthusiasts. But it is a concern for many others, and everyone should be aware of it.

Intel CPU Warranty Information (my bold added)

Intel warrants the Product (defined as the boxed Intel® processor and the accompanying thermal solution)... ... if the Product is properly used and installed, for a period of three (3) years. This Limited Warranty does NOT cover:

• damage to the Product due to external causes, including accident, problems with electrical power, abnormal electrical, mechanical or environmental conditions, usage not in accordance with product instructions, misuse, neglect, alteration, repair, improper installation, or improper testing; OR
• any Product which has been modified or operated outside of Intel's publicly available specifications​

AMD CPU Warranty Information (their bold)

AMD is more straightforward on their page where it says the following concerning their retail, Processor In A Box (PIB), versions of their CPUs:

This Limited Warranty shall be null and void if the AMD microprocessor which is the subject of this Limited Warranty is used with any heatsink/fan other than the one provided herewith.

This limited warranty does not cover damages due to external causes, including improper use, problems with electrical power, accident, neglect, alteration, repair, improper installation, or improper testing.
​

The good news is since both AMD and Intel warranty their boxed CPUs for three years, and since replacing them at their cost is not something they want to do, both make excellent cooling solutions both in terms of cooling abilities, but also in noise levels.
​

 

[Brink]

   Warning

This thread was cleaned up of argumentative posts. Do not continue.