Question Why is Task Manager showing only 1 core on my dual core processor ?

EyyMunchian

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Dec 28, 2016
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I am unable to open the images but in task manager in the cpu section you can right click the cpu graph, select "change graph to" then select logical processors.
 
Sep 2, 2021
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Try updating your cpu drivers, do you know if your system has turned 1 core off? Check your bios and make sure all cores are enabled
i did go to the bios and turned downcoring to auto other option was single core. And how do you update cpu drivers ?? also I'm not sure if 1 core is off
 
Sep 2, 2021
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also the CPU has 2 cores and 2 threads so it should be 2 cores and 2 logical processors but it is only 1 core with 2 logical processors.
 

froggx

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Sep 6, 2017
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It's all semantics. AMD got kind of "creative" when they threw together the bulldozer microarchitecture. These things are kind of a weird hybrid crapshoot, but essentially you have 1 "module" that is addressed as 2 threads. This "module" has 2 cores for the purpose of integer calculations, so if both threads are doing ints each thread has a dedicated core to do so with. However, each module only has a single floating point unit, causing it perform like a single core, 2 thread SMT processor when both threads are running floats.

Some say 1 module = 1 core since these modules aren't true dual core items due to the shared FPU. Others will say 1 module = 2 cores since each module has 2 integer cores. Technically speaking, neither is incorrect. Either way, 1 module = 2 threads, which is clustered multithreading (CMT) rather than SMT which is used to assign 2 threads to a single core.
Bonus Reading.
 
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