Err0r4o4 Posted February 21, 2015 Share Posted February 21, 2015 Just installed Windows 10 and all the drivers. And now I notice that only first core is active. My cpu is the Phenom II X6. Anyone else in that boat ? Link to comment https://www.neowin.net/forum/topic/1247566-windows-10-use-only-first-cpu-core/ Share on other sites More sharing options...
Stokkolm Posted February 21, 2015 Share Posted February 21, 2015 My Core i5 seems to be making use of all 4 cores. Link to comment https://www.neowin.net/forum/topic/1247566-windows-10-use-only-first-cpu-core/#findComment-596759380 Share on other sites More sharing options...
mobilephone2003 Posted February 21, 2015 Share Posted February 21, 2015 If you're using the Task Manager and only see one graph, it's because it's showing you overall utilization. Change it to Logical Processors. goretsky, Quillz and Aergan 3 Share Link to comment https://www.neowin.net/forum/topic/1247566-windows-10-use-only-first-cpu-core/#findComment-596759394 Share on other sites More sharing options...
Err0r4o4 Posted February 21, 2015 Author Share Posted February 21, 2015 I found the problem. Core Parking. In power schemes if I select High Performance I get 2 cores out of 6. In Balanced I get 4 out of 6. I struggled to disable core parking with all the utilities out there and reg keys and it all failed until I forcefully disabled it in BIOS. I have a Asus motherboard and under Core Activation I was able to set them to manual instead of Auto. It did the trick. No more audio distortion in Youtube gawd daym html5 player because core one is handling the whole computer. To be noted I have a 24bit Audigy that is working A1 on this computer. In conclusion Microsoft really want to impose core parking so they did something different from previous Windows so we cant toy with that anymore. I'm not against it but now its broken for some of us. (Google "disable core parking"). Note: If any of you want to know if you have parked cores its in Resource Monitor under CPU that you can see in real time the cpu states. hellowalkman and goretsky 2 Share Link to comment https://www.neowin.net/forum/topic/1247566-windows-10-use-only-first-cpu-core/#findComment-596759396 Share on other sites More sharing options...
netty2014 Posted February 21, 2015 Share Posted February 21, 2015 msconfig.exe boot advanced change the number of cpu's your os is using sorry but ive know that since windows started Link to comment https://www.neowin.net/forum/topic/1247566-windows-10-use-only-first-cpu-core/#findComment-596759416 Share on other sites More sharing options...
BooBerry Posted February 21, 2015 Share Posted February 21, 2015 I found the problem. Core Parking. In power schemes if I select High Performance I get 2 cores out of 6. In Balanced I get 4 out of 6. I struggled to disable core parking with all the utilities out there and reg keys and it all failed until I forcefully disabled it in BIOS. I have a Asus motherboard and under Core Activation I was able to set them to manual instead of Auto. It did the trick. No more audio distortion in Youtube gawd daym html5 player because core one is handling the whole computer. To be noted I have a 24bit Audigy that is working A1 on this computer. In conclusion Microsoft really want to impose core parking so they did something different from previous Windows so we cant toy with that anymore. I'm not against it but now its broken for some of us. (Google "disable core parking"). Note: If any of you want to know if you have parked cores its in Resource Monitor under CPU that you can see in real time the cpu states. Please use the insider app to report so they can fix it. My APU when idle still uses 40% - 50% CPU reported it. viabaipo, guydelup, Miss Contractility and 4 others 7 Share Link to comment https://www.neowin.net/forum/topic/1247566-windows-10-use-only-first-cpu-core/#findComment-596759418 Share on other sites More sharing options...
Err0r4o4 Posted February 21, 2015 Author Share Posted February 21, 2015 Please use the insider app to report so they can fix it. My APU when idle still uses 40% - 50% CPU reported it. Done And as a follow up my computer is running very well since yesterday. Idle cpu usage is less than 1%. Power consumption (according to my UPS) is just like before I try Win 10. There are a whole lot of bugs everywhere in this Windows but at least my cpu is doing alright. Link to comment https://www.neowin.net/forum/topic/1247566-windows-10-use-only-first-cpu-core/#findComment-596759784 Share on other sites More sharing options...
BooBerry Posted February 23, 2015 Share Posted February 23, 2015 Done And as a follow up my computer is running very well since yesterday. Idle cpu usage is less than 1%. Power consumption (according to my UPS) is just like before I try Win 10. There are a whole lot of bugs everywhere in this Windows but at least my cpu is doing alright. Was is always ok in W10TP or Fixed in recent build? Tried the first two TPs where the issue occured. magicmike, Miss Contractility, guydelup and 4 others 7 Share Link to comment https://www.neowin.net/forum/topic/1247566-windows-10-use-only-first-cpu-core/#findComment-596761522 Share on other sites More sharing options...
Aergan Posted February 23, 2015 Share Posted February 23, 2015 Has always worked fine "out of the box" for me on #9926 x64: I've not needed to run or change anything - nor would I expect to have to. Link to comment https://www.neowin.net/forum/topic/1247566-windows-10-use-only-first-cpu-core/#findComment-596761948 Share on other sites More sharing options...
x-byte Posted February 24, 2015 Share Posted February 24, 2015 msconfig.exe boot advanced change the number of cpu's your os is using sorry but ive know that since windows started That's not how that works ... And has nothing to do with core parking. it is used for debugging for different core/cpu requirements. Default uses all core/cpu's. Link to comment https://www.neowin.net/forum/topic/1247566-windows-10-use-only-first-cpu-core/#findComment-596762270 Share on other sites More sharing options...
gbullr Posted June 7, 2016 Share Posted June 7, 2016 Anyone know how to fix this same problem for multiple cpu motherboards. Device manager sees 16 cores Task manager only 4. Thanks in advance Link to comment https://www.neowin.net/forum/topic/1247566-windows-10-use-only-first-cpu-core/#findComment-597445512 Share on other sites More sharing options...
chaos0099 Posted August 4, 2016 Share Posted August 4, 2016 i5 680 CPU - dual core, 4 logical. Now I'm seeing only half my cores in the Windows 10 task manager (2 logical). Device manager shows all 4. This was not the case the last time I checked and I didn't make any changes. . I think there is a nasty bug in the latest Windows 10 update. Anyone else seeing this? Link to comment https://www.neowin.net/forum/topic/1247566-windows-10-use-only-first-cpu-core/#findComment-597526790 Share on other sites More sharing options...
chaos0099 Posted September 12, 2016 Share Posted September 12, 2016 SOLVED - Windows 10 by default (which I think was set during some MS update a few months back) has the "Number of processors" for boot check box checked which, depending on the number of processors selected, will boot only that number of processors. The fix is to uncheck this check box. System Configuration --> Boot --> Advanced Options --> uncheck "Number of processors" and also uncheck "Maximum Memory" (not sure why anyone would want to limit the memory). Click OK and reboot. System should come up with correct number of logical processors (AMD cores or Intel Hyperthreads). Link to comment https://www.neowin.net/forum/topic/1247566-windows-10-use-only-first-cpu-core/#findComment-597582248 Share on other sites More sharing options...
adrynalyne Posted September 12, 2016 Share Posted September 12, 2016 On 2/21/2015 at 4:45 AM, netty2014 said: msconfig.exe boot advanced change the number of cpu's your os is using sorry but ive know that since windows started Oh lord. Not this (false) chestnut again. MorganX 1 Share Link to comment https://www.neowin.net/forum/topic/1247566-windows-10-use-only-first-cpu-core/#findComment-597582250 Share on other sites More sharing options...
NinjaGinger Posted September 12, 2016 Share Posted September 12, 2016 15 minutes ago, chaos0099 said: SOLVED - Windows 10 by default (which I think was set during some MS update a few months back) has the "Number of processors" for boot check box checked which, depending on the number of processors selected, will boot only that number of processors. The fix is to uncheck this check box. System Configuration --> Boot --> Advanced Options --> uncheck "Number of processors" and also uncheck "Maximum Memory" (not sure why anyone would want to limit the memory). Click OK and reboot. System should come up with correct number of logical processors (AMD cores or Intel Hyperthreads). Was that without me changing. Link to comment https://www.neowin.net/forum/topic/1247566-windows-10-use-only-first-cpu-core/#findComment-597582272 Share on other sites More sharing options...
norseman Posted September 12, 2016 Share Posted September 12, 2016 18 minutes ago, chaos0099 said: SOLVED - Windows 10 by default (which I think was set during some MS update a few months back) has the "Number of processors" for boot check box checked which, depending on the number of processors selected, will boot only that number of processors. The fix is to uncheck this check box. System Configuration --> Boot --> Advanced Options --> uncheck "Number of processors" and also uncheck "Maximum Memory" (not sure why anyone would want to limit the memory). Click OK and reboot. System should come up with correct number of logical processors (AMD cores or Intel Hyperthreads). Lol, you're making ###### up or running some bugged out version of your OS. This is not necessary at all. I didn't have to tweak ###### for my system to run like a mother ######er. Rolling my eyes at your post. Link to comment https://www.neowin.net/forum/topic/1247566-windows-10-use-only-first-cpu-core/#findComment-597582274 Share on other sites More sharing options...
Jason S. Global Moderator Posted September 12, 2016 Global Moderator Share Posted September 12, 2016 Everyone - this is a pretty old thread from early 2015. I'm going to close it now as it's already been solved by the OP. If you'd like to open a new thread about the topic, feel free. Link to comment https://www.neowin.net/forum/topic/1247566-windows-10-use-only-first-cpu-core/#findComment-597582286 Share on other sites More sharing options...
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