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Athlon 64x2 only running sungle core/thread

Last response: in CPUs
May 5, 2010 12:24:17 PM

hi my friend has just noticed his athlon64 x2 is only running a single core. iv looked into it and its not his bios(it recognises the cpu and the fact that it has 2 logical processor)but if you run dxdiag or cpu-z it says its an athlon64 x2 but only shows one logical core running. we though maybe it was a HAL setting in msconfig but that didnt work either.

we are a bit stumped on this and cant find any info on the subject so any help would be awsome.

Thanks, Eoin
May 5, 2010 12:31:14 PM

this is his dxdiag info

OS Name Microsoft® Windows Vista™ Home Premium
Version 6.0.6001 Service Pack 1 Build 6001
Other OS Description Not Available
OS Manufacturer Microsoft Corporation
System Manufacturer System manufacturer
System Model System Product Name
System Type X86-based PC
Processor AMD Athlon(tm) 64 X2 Dual Core Processor 5800+, 3006 Mhz, 1 Core(s), 1 Logical Processor(s)
BIOS Version/Date American Megatrends Inc. 1302, 2/13/2009
SMBIOS Version 2.5
Windows Directory C:\Windows
System Directory C:\Windows\system32
Boot Device \Device\HarddiskVolume3
Locale United States
Hardware Abstraction Layer Version = "6.0.6001.18000"
User Name Dave_Admin-PC\Dave_Admin
Time Zone Eastern Daylight Time
Installed Physical Memory (RAM) 2.00 GB
Total Physical Memory 2.00 GB
Available Physical Memory 1.07 GB
Total Virtual Memory 7.94 GB
Available Virtual Memory 6.25 GB
Page File Space 6.00 GB
Page File C:\pagefile.sys
May 5, 2010 12:49:24 PM

Was the x2 cpu put in after windows was originally installed on a single core or was it installed with the x2 cpu?
Related resources
May 5, 2010 12:52:09 PM

no it was a fresh install on a newly built system.
May 5, 2010 12:56:13 PM

Try reseating the cpu. It's also possible one core is bad.
In task manager how many cpu graphs are there?
May 5, 2010 1:06:05 PM

only one graph shows in task manager. yeah i was hoping it wasnt a bad core but it looks that way. il ask him to reseat the cpu later when i talk to him. is their anything else that could be wrong?
May 5, 2010 2:07:10 PM

quick update, we have updated the MB chipset drivers and bios and no change.
also a friend commented on the bad core theory and suggested its not possible because the chip would fail at POST if it was gone bad. i dont know if thats true(im a novice at this) anyone got any thoughts on this?
June 22, 2014 12:30:52 AM

I had the same problem. I disabled cool n quiet in the BIOS based on someone's suggestion, and when I restarted it showed 2 logical cores in the task manager!! Computer runs much faster also! Thanks for the help.