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November 21st, 2017 06:00
No hyperthreading in new motherboard
I bought a replacement motherboard for the Inspiron 17r 7720 (CN-072P0M), but the new motherboard does not have any options to allow hyperthreading for my i7 in spite of being the same part number (CN-072P0M).
Does anybody know why or how I can enable this?
EDIT: The BIOS is the newest version (A17). The CPU is the same from the prior motherboard. In the previous motherboard, Windows detected 8 CPUs and Linux detected 4 CPUs and 2 threads per CPU. In the new motherboard, Windows detects 4 CPUs and Linux detects 4 CPUs with 1 thread per CPU.
The motherboard is the only thing different.
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jphughan
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14K Posts
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November 21st, 2017 09:00
Try updating the BIOS if you haven't already. Then, have you verified that your CPU does in fact support Hyper-Threading by checking its specs on ark.intel.com? If so, have you verified that Hyper-Threading isn't already active? I guess it's possible that Hyper-Threading is simply enabled when supported by the CPU with no option to disable it anymore.
SuperMechaCow
3 Posts
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November 21st, 2017 09:00
EDIT: Whoops.
SuperMechaCow
3 Posts
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November 21st, 2017 10:00
The BIOS is the newest version (A17). The CPU is the same from the prior motherboard. In the previous motherboard, Windows detected 8 CPUs and Linux detected 4 CPUs and 2 threads per CPU. In the new motherboard, Windows detects 4 CPUs and Linux detects 4 CPUs with 1 thread per CPU.
The motherboard is the only thing different.
jphughan
9 Legend
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14K Posts
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November 21st, 2017 11:00
In that case, if there's nothing in the BIOS Setup interface about this option, it sounds like you need to exchange that replacement motherboard. There's no software utility I'm aware of that can be used to make this option configurable at a BIOS level. Sorry! :(