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cuttingedgecs
Joined: 08 Oct 2017
Posts: 1764
Location: Australia
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 Posted: Wed Sep 26, 2018 1:17 am Post subject: |
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| H3nrik V! wrote: | | i.e. - would the server even be able to report an error if it was a TTV? |
An old desktop system probably couldn't, but a server will usually have some sort of system management processor built in to the board, and more recent Intel chipsets feature IME which can run code in the chipset (without a working plugged in CPU). A Dell server in particular will typically also have a part called a DRAC which contains an ARM CPU which lets you in to the BIOS and other things remotely via network to do reboots etc even when the CPU crashes. So there are plenty of ways the server could be running the code to test for a CPU without a working CPU. |
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H3nrik V!
Joined: 15 Apr 2014
Posts: 1246
Location: Denmark
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| Posted: Wed Sep 26, 2018 1:21 am Post subject: |
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| cuttingedgecs wrote: | | H3nrik V! wrote: | | i.e. - would the server even be able to report an error if it was a TTV? |
An old desktop system probably couldn't, but a server will usually have some sort of system management processor built in to the board, and more recent Intel chipsets feature IME which can run code in the chipset (without a working plugged in CPU). A Dell server in particular will typically also have a part called a DRAC which contains an ARM CPU which lets you in to the BIOS and other things remotely via network to do reboots etc even when the CPU crashes. So there are plenty of ways the server could be running the code to test for a CPU without a working CPU. |
Makes sense, but I wonder if it would report another error than insufficient current, then, if die was not functional at all? |
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cuttingedgecs
Joined: 08 Oct 2017
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Location: Australia
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| Posted: Wed Sep 26, 2018 1:34 am Post subject: |
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I'm assuming the board is testing the CPU for a short circuit/low resistance with a very low voltage before trying to run it at full power to turn it on. All of the other testing that would reveal if it was just a bunch or resistors or working silicon would happen after that.
The error is really only telling us two things at the moment - the chip isn't open circuit, and the chip is drawing more power than an E series Harpertown. To learn more without destroying the chip, you'd possibly need to put it in a board that can support an X series Harpertown. Those could run up to 150W TDP like Jayhawk was supposed to. |
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lazyfortress
Joined: 16 Sep 2018
Posts: 279
Location: Maryland, USA
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| Posted: Wed Sep 26, 2018 8:23 am Post subject: |
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| cuttingedgecs wrote: | I'm assuming the board is testing the CPU for a short circuit/low resistance with a very low voltage before trying to run it at full power to turn it on. All of the other testing that would reveal if it was just a bunch or resistors or working silicon would happen after that.
The error is really only telling us two things at the moment - the chip isn't open circuit, and the chip is drawing more power than an E series Harpertown. To learn more without destroying the chip, you'd possibly need to put it in a board that can support an X series Harpertown. Those could run up to 150W TDP like Jayhawk was supposed to. |
So could I get a new motherboard for my server that supports 150W? Would I also need to get a new PSU? I haven't checked what wattage my two PSUs are. I'll do that once I get home from school.
As for the X-series Harpertown, I found a Xeon X5482 for $25-ish on AliExpress. It uses LGA 771, but I dunno what server motherboard supports 150W. |
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max1024
Joined: 15 Jan 2015
Posts: 636
Location: Belarus
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| Posted: Wed Sep 26, 2018 12:31 pm Post subject: |
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Very interesting  Can you use ordinary PCI POST card? Think It's better then Dells post system. If C1, C2 post and may be other runs we can say that it is not thermal sample, it is working CPU.
I have a Skulltrail system with 1Kwt PSU and aslo will if I have them into the motherboard  I like different HW experiments)) Good luck with Jayhawk, hope on the best!
| lazyfortress wrote: | Well I got to test my Dell PowerEdge 1950 with the Jayhawk. I believe the Jayhawk is a thermal sample.
I got an "intrusion error" at first when I plugged in my server. When I fired it up, the server ran for 1 second, then stopped suddenly, giving me an "E122C CPU" error.
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Parallel
Joined: 05 Aug 2018
Posts: 42
Location: Southwest Quadrant of Michigan
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| Posted: Wed Sep 26, 2018 12:56 pm Post subject: |
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| H3nrik V! wrote: | You can also try to see if it will boot with one of the known good processors, without changing BIOS settings?
On the "Thermal Test Vehicle" note - isn't a Thermal Test Vehicle just a resistor, consuming as much power as a real chip? i.e. - would the server even be able to report an error if it was a TTV? |
I'd think so, BIOS is still functional, right? |
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lazyfortress
Joined: 16 Sep 2018
Posts: 279
Location: Maryland, USA
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| Posted: Thu Sep 27, 2018 6:43 pm Post subject: |
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| I believe my server has been using 1 processor this whole time, according to the startup |
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