i7 8700k loads in windows as a dual core

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TheDarkOne198

TheDarkOne198

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Jan 9, 2012
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I just upgraded to an i7 8700K and its sitting in an MSI SLI Plus board. It for some reason loads into windows as a 2 core/4 thread CPU and damn,is everything sluggish. The i5 I had before was way faster! In the BIOS,it looks like all 6 cores are active and hyper threading is enabled. I Do not understand why. I have the latest BIOS update and from what I can tell,everything should be working fine on the BIOS end of things. Both CPU-Z and Core Temp read it as an i7 8700K,only with 2 cores/4 threads. Windows 10 has no activation issues and while I am currently installing all the fancy MSI software,I really doubt that will effect this. Is there a BIOS setting I am missing? It should automatically enable all 6 cores,which it looks like it does because,as I said before, the BIOS shows 6 cores and has HT enabled. Someome please help,I didnt spend all that money on a 7th Gen i3.
 
Solution
volkgren
Sometimes Windows has trouble reading an upgraded CPU. Sometimes resetting BIOS to defaults fixes it, other times a Windows reinstall is necessary.
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TheDarkOne198

TheDarkOne198

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Jan 9, 2012
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Edit!: I dont know what I did but I tried setting it to load only 5 cores in BIOS,rebooted and it was still 2C/4T and upon rebooting again and setting it to "All" cores, it booted into windows as a proper 6 core/12 Thread CPU. There was also an update installed of the XTU utility,although like everyone knows,its best to OC in BIOS and I dont think it should change this anyways. XTU was showing things wrong too,not showing the package temp and not showing peak CPU speeds. Not sure what I did but all seems well now. Hope the next restart does not make it go dual core again. Its resolved for now at least.
 
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TheDarkOne198

TheDarkOne198

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Jan 9, 2012
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I had to resintall,or rather "refresh" on my last upgrade from a A10-7850K to the i5 6600K because of a BSOD. Apparently the chipset drivers. I considered restting to default in BIOS but didnt think it would do anything. Apparently changing the core count in BIOS from 5 and then back to All did the trick. Giving you the best answer since you are first to respond and your suggestion probably was very plausible. Thank you!
 
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