[SOLVED] 3700x only detecting 3 cores

[aocon62]

I just installed my 3700x in my pc. It turns on, it works, but only is detecting three cores. I went into ms config and it shows only 6 cores. However, device manger also shows that my 3700x apparently has 16 cores. I am quite confused.
The board says it is ryzen 3000 ready, detects that it is indeed a 3700x. It also runs at boost clock of 4.2 ghz. I have not installed any drivers or updated Bios.
I have a user benchmark score that shows this:
https://www.userbenchmark.com/UserRun/19548822

 

[Lutfij]

First of all, Userbench is absolutely unwarranted for use. Even more so when you don't understand how they grade/rank a system for being good or bad.

Please list your specs like so:
CPU:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:

Mentioning what the make and model of your PSU is. What is the version for your OS? You seem to be on the second latest BIOS update out there for your board, can you check and see which version you're on?

 

[Darkbreeze]

Download HWinfo. Install it. Run it and choose the "sensors only" option.

Scroll down to the CPU information showing core utilization and take a screenshot of the CPU information showing number of cores and what percent of usage.


*Download HWinfo


Post the screenshot here.

 

[Darkbreeze]

Monitoring software​

HWmonitor, Open hardware monitor, Realtemp, Speccy, Speedfan, Windows utilities, CPU-Z, NZXT CAM, Userbenchmark and most of the bundled motherboard utilities are often not the best choice as they are not always accurate. Some are actually grossly inaccurate, especially with certain chipsets or specific sensors that for whatever reason they tend to not like or work well with. I've found HWinfo or CoreTemp to be the MOST accurate with the broadest range of chipsets and sensors. They are also almost religiously kept up to date.

CoreTemp is great for just CPU thermals including core temps or distance to TJmax on older AMD platforms.

HWinfo is great for pretty much EVERYTHING, including CPU thermals, core loads, core temps, package temps, GPU sensors, HDD and SSD sensors, motherboard chipset and VRM sensor, all of it. When starting HWinfo after installation, always check the box next to "sensors only" and de-select the box next to "summary".


Run HWinfo and look at system voltages and other sensor readings.

Monitoring temperatures, core speeds, voltages, clock ratios and other reported sensor data can often help to pick out an issue right off the bat. HWinfo is a good way to get that data and in my experience tends to be more accurate than some of the other utilities available. CPU-Z, GPU-Z and Core Temp all have their uses but HWinfo tends to have it all laid out in a more convenient fashion so you can usually see what one sensor is reporting while looking at another instead of having to flip through various tabs that have specific groupings, plus, it is extremely rare for HWinfo to not report the correct sensor values under the correct sensor listings, or misreport other information. Utilities like HWmonitor, Openhardware monitor and Speccy, tend to COMMONLY misreport sensor data, or not report it at all.

After installation, run the utility and when asked, choose "sensors only". The other window options have some use but in most cases everything you need will be located in the sensors window. If you're taking screenshots to post for troubleshooting, it will most likely require taking three screenshots and scrolling down the sensors window between screenshots in order to capture them all.

It is most helpful if you can take a series of HWinfo screenshots at idle, after a cold boot to the desktop. Open HWinfo and wait for all of the Windows startup processes to complete. Usually about four or five minutes should be plenty. Take screenshots of all the HWinfo sensors.

Next, run something demanding like Prime95 version 26.6 or Heaven benchmark. Take another set of screenshots while either of those is running so we can see what the hardware is doing while under a load.

*Download HWinfo


For temperature monitoring only, I feel Core Temp is the most accurate and also offers a quick visual reference for core speed, load and CPU voltage:


*Download Core Temp


Posting screenshots, when requested, is helpful so WE can see what is going on as well and you can learn how to do that here:

How to post images on Tom's hardware forums




​

 

[aocon62]

I got the screen shots you asked for
Idle:

https://imgur.com/fNaZlU5

View: https://imgur.com/fNaZlU5

Load:

https://imgur.com/W4RfiUX

View: https://imgur.com/W4RfiUX

 

[aocon62]

First of all, Userbench is absolutely unwarranted for use. Even more so when you don't understand how they grade/rank a system for being good or bad.

Please list your specs like so:
CPU:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:

Mentioning what the make and model of your PSU is. What is the version for your OS? You seem to be on the second latest BIOS update out there for your board, can you check and see which version you're on?

Specs:
Cpu: R7 3700x
Mobo: MSI b450 gaming pro carbon AC
Ram: trident z rgb 3000
Gpu: RTX 2060
PSU: Corsair RM 750x
OS: Windows 10
Bios version: 1.70, Bios settings called it E7B85AMS.170

 

[Darkbreeze]

First, try this. It involves installing Ryzen master if you haven't already, which it sounds like you have not.

Ryzen 5 2600 Only shows 3 cores and 6 Threads

So recently I've been having this problem where my CPU only shows up with 3 cores and 6 threads compared to the normal 6 cores and 12 threads. I recently redownloaded windows 10 and it fixed it.. at least for a day and then the problem happened again. If anyone can help me... please do.

forums.tomshardware.com

If that doesn't work then try doing a hard reset of the BIOS as follows, and if that doesn't work I'd recommend updating to the lastest bios version which is version 7B85v18.

Power off the unit, switch the PSU off and unplug the PSU cord from either the wall or the power supply.

Remove the motherboard CMOS battery for five minutes. In some cases it may be necessary to remove the graphics card to access the CMOS battery.

During that five minutes, press the power button on the case for 30 seconds. After the five minutes is up, reinstall the CMOS battery making sure to insert it with the correct side up just as it came out.

If you had to remove the graphics card you can now reinstall it, but remember to reconnect your power cables if there were any attached to it as well as your display cable.

Now, plug the power supply cable back in, switch the PSU back on and power up the system. It should display the POST screen and the options to enter CMOS/BIOS setup. Enter the bios setup program and reconfigure the boot settings for either the Windows boot manager or for legacy systems, the drive your OS is installed on if necessary.

Save settings and exit. If the system will POST and boot then you can move forward from there including going back into the bios and configuring any other custom settings you may need to configure such as Memory XMP profile settings, custom fan profile settings or other specific settings you may have previously had configured that were wiped out by resetting the CMOS.

In some cases it may be necessary when you go into the BIOS after a reset, to load the Optimal default or Default values and then save settings, to actually get the hardware tables to reset in the boot manager.

 

[aocon62]

First, try this. It involves installing Ryzen master if you haven't already, which it sounds like you have not.

Ryzen 5 2600 Only shows 3 cores and 6 Threads

So recently I've been having this problem where my CPU only shows up with 3 cores and 6 threads compared to the normal 6 cores and 12 threads. I recently redownloaded windows 10 and it fixed it.. at least for a day and then the problem happened again. If anyone can help me... please do.

forums.tomshardware.com

If that doesn't work then try doing a hard reset of the BIOS as follows, and if that doesn't work I'd recommend updating to the lastest bios version which is version 7B85v18.

Power off the unit, switch the PSU off and unplug the PSU cord from either the wall or the power supply.

Remove the motherboard CMOS battery for five minutes. In some cases it may be necessary to remove the graphics card to access the CMOS battery.

During that five minutes, press the power button on the case for 30 seconds. After the five minutes is up, reinstall the CMOS battery making sure to insert it with the correct side up just as it came out.

If you had to remove the graphics card you can now reinstall it, but remember to reconnect your power cables if there were any attached to it as well as your display cable.

Now, plug the power supply cable back in, switch the PSU back on and power up the system. It should display the POST screen and the options to enter CMOS/BIOS setup. Enter the bios setup program and reconfigure the boot settings for either the Windows boot manager or for legacy systems, the drive your OS is installed on if necessary.

Save settings and exit. If the system will POST and boot then you can move forward from there including going back into the bios and configuring any other custom settings you may need to configure such as Memory XMP profile settings, custom fan profile settings or other specific settings you may have previously had configured that were wiped out by resetting the CMOS.

In some cases it may be necessary when you go into the BIOS after a reset, to load the Optimal default or Default values and then save settings, to actually get the hardware tables to reset in the boot manager.

Yep ryzen master fixed it. Thank you so much mate

 

[kerberos_20]

in msconfig uncheck number of processors and check make all settings permanent too, then reboot

i guss u have some leftower from your old hardware settings in registry, this should solve your core issue
also make sure in your bios/uefi cpu cores arent limited there

 

[Darkbreeze]

in msconfig uncheck number of processors and check make all settings permanent too, then reboot

i guss u have some leftower from your old hardware settings in registry, this should solve your core issue
also make sure in your bios/uefi cpu cores arent limited there

This is wrong. Has nothing to do with the problem.