2 Replies Latest reply on Mar 22, 2012 1:10 PM by xiangchen

    High temp with i7-860


      Just received replacement i7-860 by RMA, and tried stress testing yesterday, the core temp easily went up to 99 degree C within several minutes when Intel Processor Diagnotic Tool started stress testing, below is brief spec of my rig:


      CPU: i7-860, no OC, all defaults with stock cooler

      Mobo: Gigabyte P55A-UD4P, BIOS F14

      RAM: Gskill 2*4G @ DDR3-1600

      stress testing tool: latest IPDT (default settings except stress testing time set to 10 mins)

      temp monitor tool: Real Temp, latest version

      ambient temp: 25 degree C


      I stopped the stress testing when one of the core temp reached 99


      May I confirm what's the Tj MAX for i7-860?

      according to "Thermal/Mechanical Specifications and Design Guidelines" for intel Core i7-800 series (Table 6-2, p38), when ambient temp is below 40 degree C, T case_max should be 72.7 when power goes up to 95, I tried stress testing with my previous CPU when it works, and the max temp should be below 90 degree C.  so is it a defective CPU? or a defective fan-heatsink?

        • 1. Re: High temp with i7-860

          The maximum recommended temperature for this processor is 72.7 degrees Celsius, keep in mind that this is the CPU temperature; you do not need to worry about the cores temperature.

          The Cores temperature can reach around 110 degrees Celsius and it will be OK.

          So basically as long as the CPU temperature does not reach above 72.7 degrees Celsius, the CPU will be running under specifications.

          • 2. Re: High temp with i7-860

            Thanks for your clarification.  Following your comments, I have done more testing as below.


            Run IPDT stress testing for 10 mins, and monitor the CPU temp using Gigabyte tool EasyTune6 (since RealTemp can only report core temp). 

            • Before IPDT started to run, system temp was 35 degree C, and CPU temp was 40 degree C
            • After stress testing started, in 3 to 4 mins CPU temp raised to 81 degree C, but no change to system temp.  CPU fan speed increased to around 2070 RPM, and I could hear bit noisy
            • Till end of stress testing, there were no change to CPU temp and system temp


            Then I ran IPDT stress testing again for 10 mins, and I can get exactly the same result using AIDA64 to monitor CPU temp/system temp


            Below is IPDT result saved after one try

            --- IPDT64 - rev ---
            --- Start Time: 03/23/2012 01:55:56---
            --- Skipping Config ---
            --- Reading CPU Manufacturer ---
            Expected --> GenuineIntel
            Detected --> GenuineIntel
            Found --- Genuine Intel Processor ---
            --- Temperature Test ---
            Temperature Test Passed!!!
            Temperature = 45 degrees C below maximum.
            --- Reading Brand String ---
            Detected Brand String:
            Intel Core i7          860   2.80GHz
            Brand String Test Passed!!!
            --- Reading CPU Frequency ---
            Expected CPU Frequency is --> 2.80
            Detected CPU Frequency is --> 2.83639
            CPU Frequency Test Passed!!!
            --- FSB NOT Supported on this Processor ---
            --- Running Base Clock test ---
            Detected Base Clock --> 135
            Base Clock test Pass ---
            --- Running Floating Point test ---
            Million Floating Points per Second, MFLOPS --> 345.6
            Floating Point Test Pass ---
            --- Running Prime Number Generation Test ---
            Operation Per Second--> 4.65205e+006
            Prime Number Generation Test Pass ---
            --- Reading Cache Size --- 
            - Detected L1 Data Cache Size --> 4 x 32
            - Detected L1 Inst Cache Size --> 4 x 32
            - Detected L2 Cache Size --> 1024
            - Detected L3 Cache Size --> 8192
            Cache Size Test Passed!!!
            --- Determining MMX - SSE capabilities ---
            --- CPU FEATURES DETECTION FOR ---
            --- MMX/SSE/SSE2/SSE3/SSSE3/SSE4.1/SSE4.2 ---
            MMX      - Intel MMX Technology Feature Supported -->          Yes---> PASS
            SSE      - Streaming SIMD Extensions Feature Supported -->     Yes---> PASS
            SSE2      - Streaming SIMD Extensions 2 Feature Supported -->     Yes---> PASS
            SSE3      - Streaming SIMD Extensions 3 Feature Supported -->     Yes---> PASS
            SSSE3      - Supplemented SSE 3 Feature Supported -->          Yes---> PASS
            SSE4.1      - Streaming SIMD Extensions 4.1 Feature Supported -->     Yes---> PASS
            SSE4.2      - Streaming SIMD Extensions 4.2  Feature Supported -->     Yes---> PASS
            Test Cycle Count = 100
            --- MMX_SSE - capabilities check complete ---
            MMX - SSE Testing Passed !!
            --- Determining AVX AES PCLMULQDQ capabilities ---
            --- CPU FEATURES DETECTION FOR ---
                      --- AVX/AES/PCLMULQDQ ---
            AVX           - Advanced Vector Extensions Supported -->     No
            AVX OS Support   - AVX Operating System Supported -->          No ---> No Test Required
            AES           - Advanced Encryption Standard Supported -->     No ---> No Test Required
            PCLMULQDQ      - Polys Carry-Less Multiply Supported -->     No ---> No Test Required
            --- AVX AES PCLMULQDQ capabilities check complete ---
            AVX Compare Test Result --- Not Tested
            AES Test Result --- Not Tested
            PCLMULQDQ Test Result --- Not Tested
            No AVX AES PCLMULQDQ Tests required
            --- Reading Memory Size ---
            Detected Memory Size is --> 8.00GB
            --- Integrated Memory Controller Stress Test ---
            --- Integrated Memory Controller Stress Test Pass!!! ---
            Integrated Memory Controller Test Pass!!!
            --- Intel(R) 6 Series Chipset or Intel(R) C200 Series Chipset Not Detected  ---
            ..Platform Controller Hub Test only supported Intel(R) 6 Series Chipset or Intel(R) C200 Series Chipset..
            ..Skipping Platform Controller Hub Test..
            Skipping Platform Controller Hub Test
            ..Query 3..
            --- Querying for Intel(R) Integrated Graphics Device (IGD) ---
            ..Intel(R) Integrated Graphics Device not supported on this processor..
            ..Skipping Intel(R) Integrated Graphics Device Presence Test..
            --- CPU Load ---
            --- Load Level = 8
            CPU Load Passed!!!
            --- Temperature Test ---
            Temperature Test Passed!!!
            Temperature = 18 degrees C below maximum.
            --- Test End Time: 03/23/2012 02:05:55---


            IPDT doesn't report actual temp after stress testing, instead only 18 degrees C below maximum was reported.  I have no way to find out what is the maximum degree. 


            Adolfo_Intel, Could you please kindly advise what is the maximum degree?  if the maximum degree is 110, CPU temp is the way beyond 72.7