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TJmax of IB-E

tistou77
Level 13
Hello

The Tjmax of IB-E (4930K) is 91°C or 95°C?
Different softwares monitoring (latest) does not indicate the same

RealTemp: 91°C
Aida64: 95°C
CoreTemp: 95°C

Which is good?

Thanks
Sorry for my english 😄


Case: Lian Li A77F
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RAM: G.Skill Trident Z RGB Royal 4x8Gb @4000 C16
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7 REPLIES 7

Necrosan
Level 12
Fairly certain it is 95C.
MB: ASUS Rampage IV Black Edition
CPU: Intel Xeon E5-2697 v2 (Cooled by Corsair H100i w/ Noctua NF-F12 fans)
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HiVizMan
Level 40
You were answered quite correctly in the AIDA forum my friend.

No fixed value it can be either 91 or 95 depending.
To help us help you - please provide as much information about your system and the problem as possible.

Arne_Saknussemm
Level 40
Eh? Each CPU has a different TJmax some 95 and some 91 is that correct? Little known or publicised fact about IB-E:rolleyes:....but then I presume a single CPU should give the same max on all software right?

Do 95 chips clock higher?

Arne Saknussemm wrote:
Eh? Each CPU has a different TJmax some 95 and some 91 is that correct? Little known or publicised fact about IB-E:rolleyes:....but then I presume a single CPU should give the same max on all software right?

Do 95 chips clock higher?


Yip it seems that way.

There're actually 2 methods to detect TJMax on an Ivy Bridge-E processor. First one is the MSR method AIDA64 uses, and the other you can do it yourself if you want. Make a HTML report of any pages of AIDA64, scroll to the bottom of the report. Then start scrolling back until you reach the PCI device that's labelled:

Bxx D0A F00: Intel Ivy Bridge-E/EN/EP/EP 4S/EX - Power Control Unit 0 ("Bxx" could be e.g. "BFF")

Under that label, find the line that starts with "Offset 0E0". That line should look like:

Offset 0E0: FC 33 00 00 00 0A 5F 00 40 9F 5A 00 40 9F 06 00

In that line the 7th register (starting from "FC"), register index 0xE6 will indicate your CPU's TJMax temperature in hexadecimal Celsius value. If it reads 5F, then your CPU has a TJMax of 95 Celsius. If it reads 5B, your CPU has a TJMax of 91 Celsius. You can check the description of that register in the Ivy Bridge-E datasheet Volume 2 (Intel document number 329367-001) in section 6.1.8 TEMPERATURE_TARGET, bit 23:16.


http://www.intel.com/content/dam/www/public/us/en/documents/datasheets/4th-gen-core-i7-lga2011-datas...

p83
To help us help you - please provide as much information about your system and the problem as possible.

Arne Saknussemm wrote:
Eh? Each CPU has a different TJmax some 95 and some 91 is that correct? Little known or publicised fact about IB-E:rolleyes:....but then I presume a single CPU should give the same max on all software right?

Do 95 chips clock higher?




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tistou77
Level 13
Yes Fiery answered, 2 Tjmax for IB-E... 😛
Sorry for my english 😄


Case: Lian Li A77F
MB: Rampage VI Extreme Encore
CPU: i9 10980XE
RAM: G.Skill Trident Z RGB Royal 4x8Gb @4000 C16
GPU: EVGA RTX 2080ti XC Ultra
PSU: Seasonic Prime Ultra Titanium 1000W
OS: Intel Optane 905P PCIe
DATA: Samsung 980 Pro
SOUND: Asus Xonar Phoebus

tistou77 wrote:
Yes Fiery answered, 2 Tjmax for IB-E... 😛


the TJMax is wherever your particular chip begins to throttle 🙂

my 4820k throttles at 100c, with 4 different apps monitoring it which agree with each others readings.
...wide open