I am wondering if I got a bad CPU. I just built a 3770k on an ASUS-P8Z77-V deluxe and am running it with the default optimized bios and stock intel CPU cooler. The default settings boost the clock from 3.5 to 3.9 ghz at load. Running FSX Mark 11 I am getting CPU temperatures of 81 degrees celsius measured with Real Temp software. This seems very high for out of the box default settings. I also noticed that the highset cpu fan rpm is about 1600 rpm per the Hardware Monitor software.

 

Is this normal and what others have found or should I be taking this chip back for replacement? Unfortunately Microcenter only has a 15 day replacement policy so I got 2 days left to figure this out. Appreciate any help.

 

Thanks,

 

Ted.

I reckon 81 is pretty hot:

 

From the Intel site, Ted: "^TCASE Max is the maximum temperature that the ^TCASE sensor should reach. Both ^TCASE and the thermal specification information can be found on the Intel web site."

 

Your tCase is 67.4C, so I would be talking to Microcenter...

I reckon 81 is pretty hot:

 

From the Intel site, Ted: "^TCASE Max is the maximum temperature that the ^TCASE sensor should reach. Both ^TCASE and the thermal specification information can be found on the Intel web site."

 

Your tCase is 67.4C, so I would be talking to Microcenter...

 

Paul

Only a note , i not sure Real temp read the Tcase temp not sure if they can youse the DTS temp or

They calibrate the sensor to the DTS.

My 2 cents the real Tcase is 51c when read 81 in RealTemp

 

Kind Regards / Hasse

Also watch your room temperature. Anyhow looks way too high to me.

 

Dirk.

You're running out of time, but, I'd redo the TIM before pulling the chip. Wouldn't be the first time a bad mount bit somebody...Don

Hmmm. for sure.. I would like to use a couple of other temp measurement, too, Hasse. 81c is hot, though, for 3.9. even 71 would be on the hot side. As you say, though, it depends where those tools take their temp from. It's a little subjective, too, as anyone putting a new proc and heatsink on a board doesn't necessarily get it precisely right the first time, plus poor paste, plus there are some questionable methods of putting paste on that can easily cause an airspace, so it might well be hot.

 

Running CoreTemp, RealTemp and Speccy, I have three different temps showing on my pc at this minute, between 29 and 33..

Hi

81C is Very high for Fsx.

Wy not run Aida64 stabitility test there you have temp and voltagemonitoring.

I have not run a 3770k with stock cooler dont now the normal temp.

Can be that with stock cooler and bios set the vcore @3.9 slightly high.

As other pointed out high room temp , bad mount .

@3.9 running fsx an avarge temp of 50-60C would be apceptable.

Remount it... And ensure it has thermal grease on it... Or if it came with some, when you remount, just check the coverage of whatever they use is still equal. If it has several locking pins or screws on the fan assembly, tighten those down equally in a criss-cross pattern.

 

If its just very hot where you are, consider getting a sealed water cooler. I use an Antec Kuhler 620 and my i5-750 CPU runs cooler now overclocked to 3/7Ghz than it did at 2.6 Ghz with the standard fan previously. A great investment!

Thanks for all the replies guys. I made the trip back to Microcenter yesterday and they said to clean off the old thermal paste, put on some new, and try it again running prime 95. I talked to a number of people there but I could not get a definitive answer on what the normal CPU temps are with a stock cooler running the default bios settings. I cleaned off the old intel TIM and put on some artic silver 5. Running FSX mark 11 it is hitting 78C. I am going to try Prime 95 and OCCT next and will report back. The default Asus P8Z77v-deluxe bios settings enable turbos boost and it goes right to 3.9 ghz when FSX is started. I'll report back.

 

Paul, how do I determine what my T_Case is? Between hardware monitor, core temp and real temp, I see a number of CPU temperatures, but not one with that designation. I did a quick google search and the posts I found said that it can't be measured.

 

Ted

The Intel site publishes (most) specs for all processors, but as Hasse suggests - the method of where it is read and how any particular testing application might report it, is not necessarily going to give one the right answer.

 

Hasse , who is very much an expert on cooling, mentioned a figure of tCase probably being closer to 51c when RT was showing 81c, and so this may well be correct.. , with both RealTemp and CoreTemp using the temperature relative to TjMax sensor to report temperature. Problem comes about when Intel doesn't show all sensing data, or doesn't publish data which was normally published with earlier procs.

 

The temp to be aware of is the tjMax, which is 105c (reported here) for the 3770K.

 

Only a note , i not sure Real temp reads the Tcase temp. I'm also not sure if they use the DTS temp or

they calibrate the sensor to the DTS.

My 2 cents the real Tcase is 51c when reading 81c in RealTemp

Kind Regards / Hasse

My 2 cents agrees.

 

Here's a great guide for Intel temp measurement, and I learned more than a few things from it, and here, from RealTemp.

 

All the best.

I ran OCCT with the default asus bios settings and it shut itself down within a minute do to a CPU overtemp of 85C. I then ran Prime95 and it also hit 85C within a minute so I shut it down. Perhaps the stock cooler cannot handle stress testing with the turbo boost. But since I cannot find a definitve answer to this and I am out of time, its off to Microcenter I go to get another CPU.

Ted

It dont sounds good

Make a test with Adia64 ( stabitily test ) there you have temp and voltage monitoring

Run it for 1min then stopp the test check and report temp and vcore.

Probaly you have a fault CPU, or the vcore is to high for some reason

Just got back from Microcenter with a new 3770K CPU. I will run an Aida64 test in addition to the others after I get it installed. I forgot to mention above that when I ran the OCCT and Prime95 tests the vcore voltage went as high as 1.2 volts from turbo boost and the asus default auto settings. From what I am reading on the web, the temperature of these chips is very sensitive to excess voltage and 1.2 seems high for only 3.9 ghz.

I put the new CPU in with the stock Intel cooler and Intel thermal paste and ran the following tests with a room temperture of 71 F (22 C).

 

Aida 64 stability test for one minute: 70 C max CPU, 1.08 vcore max

Aida 64 stability test for 5 minutes: 73 Cmax CPU, 1.08 vcore max

Prime 95 small FFT for 3 minutes: 80 C max CPU, 1.05 vcore

OCCT small data set for 4 minutes: 78 C max CPU, 1.062 vcore

 

The bios was set at the default settings except for the fan control. When I started running the tests last night I noticed that the the turbo boost would only take it to 3.7 ghz vs the 3.9 ghz with the previous CPU. This morning I found out that the turbo boost should only allow one core to get to 3.9 ghz, if all 4 are loaded the max boost should be 3.7 ghz. I don't know why the other chip was going to 3.9 with all 4 cores. This morning I cleared the cmos and reloaded the default settings. The above tests are at 3.7 ghz on all 4 cores. Hyperthreading is also on by default so I left it on.

 

Up til this morning I had not installed the Asus AI suite software as I saw a lot of unfavorable reports about it. I decided to install it this morning as I read you could make some changes to the bios in real time without having to reboot. After loading it I discovered that the Asus CPU monitor reading was 20C lower than Core Temp, Real Temp, and all of the other 3rd party software at full load. This low CPU temp controls the fan speed and was part of the reason that my temps were so high. By default the CPU fan does not reach full speed until 70C. Well 70C per the Asus monitor equates to a 90C reading by all the other monitors. So for the tests above I changed the Asus fan curve to reach full speed at 50C(Asus) or 70C(all others). This resulted in full fan speed under load for the tests above. This is the only change I made to the bios, and this was not done in the bios, but with the AI Suite software.

 

So my questions now are:

Are the temperatures above normal for a 3770K at 3.7 ghz with the stock cooler?

Is any one else with an Asus motherboard seeing these low CPU temperatures readings with the Asus CPU monitor under load?

 

Thanks,

Ted

Doesn't surprise me to be honest, the stock Intel cooler is rubbish. Why not buy a decent CPU cooler. You've spent a lot on the PC, so why skimp on the cooler.

 

As for temp monitoring. Asus temp monitoring doesn't measure core temp, so will be cooler. Many get confused by that. I believe Asus measures temp from a probe in the socket. It's not Tcase, or Tjunction.

 

IIRC.