Real Temp - New temp program for Intel Core processors

[unclewebb]

sakis_the_fraud: Readings of 0 0 in the Sensor Movement Test is the first sign that your sensors may get stuck at lower temperatures and the CPU Cool Down Test seems to confirm that. From 62.5% down to Idle, both of your sensors are stuck at 56 away from TJMax. Here is what sensors that don't get stuck will look like during this test:

http://www.xtremesystems.org/forums/...postcount=2489

You can buy a Kill A Watt meter on EBay for about $15. Plug your computer into that and monitor its power consumption. During each step of the CPU Cool Down Test, you will see power consumption decrease. If the power your CPU is consuming goes down then its heat output and core temperature will also go down as long as your CPU fan speed, cooling capacity and room temperature are all kept constant.

Intel has said that when these sensors get 50 or more away from TJMax, they have a tendency to become saturated which is another way to say that they get stuck. E0 does not always equal better sensors.

Warboy: The X33xx series CPU is not auto detected correctly...

I went to Tom's and had a look at the TJ Target tables which is based on information Intel released at the last IDF. The first table is for 65nm Desktop CPUs and as far as I can tell, every value in that first table is wrong. By wrong I mean that using Intel's TJ Target values as TJMax will, for most users, give you less accurate core temperatures, not more accurate.

At IDF, Intel also showed that TJMax is not a fixed value. TJMax for any individual processor within a series can fall into a wide range of different temperatures. For 45nm CPUs the range might be plus or minus 5C. The range for 65nm sensors might be the same or it might be different. TJ Target for 45nm CPUs might be closer to the average TJMax for 45nm. TJ Target might represent the low end of TJMax for 65nm. Are you confused yet? Me too.

I've spent a lot of time during the last few months going over Intel's IDF news releases, reading between the lines, asking questions, doing some more testing and trying to understand what is really meant by TJ Target. My conclusion is that if you use the Intel released TJ Target values as TJMax, your reported core temperatures, in most cases, will be wrong.

That's just the first table I'm looking at. If using any value in that first table as TJMax results in less accurate core temperatures, then it's impossible for me to pick through the rest of this information trying to find out which values are correct and which ones aren't.

RealTemp, Core Temp and Everest let you use whatever TJMax you want so if you believe that the information released by Intel accurately represents TJMax then use it. I disagree with that and won't be changing TJMax that RealTemp uses based on information from Intel's IDF news releases.

astaris: IA32_PERF_STATUS MSR (address 198H) used to contain information about VID for Core 2 Duo processors but it does not seem to contain VID information for Core i7 CPUs. The one Core i7 that I saw didn't seem to have anything stored in the upper 32 bits of that register. The lower 32 bits have also changed compared to Core 2 Duo.

RT MSR Tool



I think the lowest 5 bits contain the CPU multiplier for Core i7.
0x17 = 23 decimal

That's from a Core i7 940 in Turbo mode which has a multi of 22 + 1 for the Turbo.

This value changes by 1 depending on load and if Turbo mode is being used but it doesn't seem to have any relationship to VID anymore. Core i7 owners can download my tool and test their own CPU. Post a screen shot if you see something other than your multi hiding in there.

Bits [63..16] of this register are listed as Reserved and are not publicly documented by Intel and the bottom 16 bits are not clearly documented by Intel either. The docs only say "Current performance State Value" but it doesn't explain how to interpret those bits. I have a plan B to try and find where VID info has moved to but I don't like my chances at the moment.

WaterFlex: I'd like to know what TJMax is for your E3110 too.
If I could find an E0 stepping at a good price I'd probably buy one and do some testing with it.

I think Intel's IDF presentation says TJ Target = 95C and RealTemp probably uses TJMax = 100C. Try running your CPU at 1600 to 2000 MHz with the core voltage set to approximately 1.10 volts. If your sensors aren't stuck then compare your reported temperatures to your room or water temperature with your case open and it might become obvious what your TJMax is or isn't. Post some screen shots and I'll help you out.