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Unusual 100% CPU Usage and Reduced 20-30 FPS in Games on AMD FX-4100 and Nvidia GTX 650 Setup

bnx1122 6918 15
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  • #1 16996194
    bnx1122
    Level 7  
    Unfortunately, after following the tips from the video [TIP] Fortnite # 2- How to increase FPS / How to have more FPS !!! Works 100%
    (can't link)

    Some kind of massacre started to happen. The computer shows 100% CPU at the moments when it is doing anything and everything is slow. In addition, 3 days ago, in games where I had a fixed 60 FPS, I have unplayable 20-30. Something is clearly broken, please help.

    Computer Specifications:
    Processor: AMD FX-4100
    Graphics: Nvidia GTX 650
    8 GB RAM
    Motherboard: Asus M5A78L / USB3
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  • #2 16996230
    310artur
    Level 43  
    Follow the tips in the video from the end, repairing what you broke.
    Although you created a system restore point before you started messing with the system based on the knowledge taken from the technical portal which is YT?
    There is hardly anything wrong or harmful in the video itself. Maybe you messed up the CPU states, maybe the graphics driver is bad, maybe ccleaner messed up because it happens to him.
    Put the system back when you can't undo the changes. This is the fastest.

    Why do you think this is a hardware problem?
  • #3 16996673
    Kasek21
    Level 43  
    What are the temperatures?

    Install and run FRAPS, install and run HWiNFO64 (sensors only) and turn on logging to the file (bottom right corner of the program window). Start the game, play for 20 minutes. and put the log from HWiNFO in the attachment (after packing).
    By the way, Process Explorer may be running in the background and give a screen from it.
  • #4 16998672
    bnx1122
    Level 7  
    Unusual 100% CPU Usage and Reduced 20-30 FPS in Games on AMD FX-4100 and Nvidia GTX 650 Setup

    I noticed that when something turns on, this application always takes 80-90%, and the System Idle Process shown in the picture is also present and takes up a lot of CPU. And there is something weird on the HWiNFO log because it only reads 1 Cora and my CPU is Quad-Core. What do you think about it?
    Attachments:
    • Elektroda.rar (26.87 KB) You must be logged in to download this attachment.
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  • #5 16998751
    Kasek21
    Level 43  
    Unusual 100% CPU Usage and Reduced 20-30 FPS in Games on AMD FX-4100 and Nvidia GTX 650 Setup

    Yes, only one core is detected.
    WinKey + R: msconfig [enter] -> tab | Boot | -> Advanced options -> Check Number of CPUs and select 4.

    If that doesn't help, check the BIOS setting to see if all cores are enabled.

    Plus high memory usage.

    bnx1122 wrote:
    the System Idle Process shown in the picture is also present and takes up a lot of CPU.

    This process means the opposite, i.e. free resources.
  • #6 16998837
    bnx1122
    Level 7  
    After unfolding the bar with the CPU Number, I have only 1 to choose from. I turned on all the rounds in the BIOS but it did not help yet 1 core available to choose from.
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  • #7 16998848
    310artur
    Level 43  
    Well, you messed up the system well ;) you already have a problem with the solution will be worse.
    If you do not touch anything and you do a reset, it is also only one core?
  • #8 16998881
    bnx1122
    Level 7  
    1 core all the time, so is there any solution other than the format?
  • #9 16998902
    310artur
    Level 43  
    First, run some Linux from a pendrive (antix will do) and see if there are 4 cores there. Maybe something really happened to the hardware.
  • #10 16998920
    safbot1st
    Level 43  
    bnx1122 wrote:
    1 core all the time, so is there any solution other than the format?

    When I look at this manual deletion of tempos and prefetch on the film, I wonder what else you amputated from the system ... if any important files, it's just a format. . .

    Added after 3 [minutes]:

    ps. Jesu, you did everything from this tutorial?
    There, the author changes a huge number of settings (certainly, smoothing the screen fonts slows down Fortnit),
    but also changes power settings - change to default.
    Until I paste. Quote from the 6th minute of the movie "We set the CPU state to ZERO, to 100%" ...:




    Epic.
  • #11 16999997
    bnx1122
    Level 7  
    On Linux CS: GO it hoots and runs nice. And I have 4 cores to choose from.

    Yes, I did everything together with the guide. Well, I don't think I have any other choice than the format.
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  • #12 17000042
    safbot1st
    Level 43  
    Have you changed the CPU states to 100% in the power settings?

    Added after 1 [minutes]:

    bnx1122 wrote:
    On Linux CS: GO it hoots and runs nice

    I didn't know it was running under the "penguin". They write on the web that FPS pulls even more. I will recommend to those who are raving under windows ...
  • #13 17000072
    Kasek21
    Level 43  
    bnx1122 wrote:
    Well, I don't think I have any other choice than the format.

    The easiest and most reliable way. Unless you have any restore points?
  • #14 17000076
    bnx1122
    Level 7  
    I don't even have these options there now as I expand the "CPU Power Management" tab. And before that they were. I also remember changing the setting from core 1 to core 4. I can't do that either. I have the impression that CCleaner at the end of the video mixed up a lot: /.

    Added after 2 [minutes]:

    Kasek21 wrote:

    Unless you have any restore points?


    I did not create any, I did not expect such consequences.
  • #15 17000102
    safbot1st
    Level 43  
    Such a moral - "experts" from YouTube should not prefer those from elektroda.pl ...
    And typing in CMD fired as administrator:
    sfc / scannow
    Fixes something?
    You can also try logging in as a hidden admin:
    net user administrator / active: yes

    are 4 cores in this account?
  • #16 17000198
    bnx1122
    Level 7  
    sfc / scannow didn't fix anything, and it's also 1st day on this hidden admin.
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Topic summary

✨ The discussion revolves around a user experiencing 100% CPU usage and a significant drop in gaming performance (20-30 FPS) on a system with an AMD FX-4100 processor and Nvidia GTX 650 graphics card. The user followed a YouTube tutorial to optimize FPS but encountered issues, including the CPU only showing one core in use despite being a quad-core processor. Responses suggest checking CPU settings in BIOS, ensuring all cores are enabled, and restoring system settings to default. The user confirmed that the system runs properly under Linux, indicating a potential software misconfiguration rather than hardware failure. Suggestions include using system restore points, running diagnostics like sfc /scannow, and considering a system format if issues persist.

FAQ

TL;DR: On this FX-4100 + GTX 650 rig, FPS dropped from 60 to 20–30 and CPU spiked; "unplayable 20–30" after tweaks. This FAQ shows how to re‑enable all cores, reset power and undo bad changes. For PC gamers troubleshooting sudden FPS loss and 100% CPU. [Elektroda, bnx1122, post #16996194]

Why it matters:** You can restore smooth gameplay fast by reversing a few misapplied settings.

Quick Facts

Why did my FPS crash from 60 to 20–30 after YouTube “FPS boost” tweaks?

Aggressive tweaks can disable cores, alter power states, or corrupt settings. The thread starter saw FPS fall to 20–30 after such changes. If core detection breaks or power is mis-set, games stutter and CPU pegs. Undo those tweaks or restore the system to recover performance. "Unplayable 20–30" indicates a major configuration fault, not a normal GPU limit. [Elektroda, bnx1122, post #16996194]

What does “System Idle Process 90%” mean in Task Manager?

It means the CPU is mostly idle. High System Idle shows available CPU time, not real usage. A contributor clarified: “This process means the opposite, i.e. free resources.” Don’t chase this number as a problem. Focus on actual processes using CPU and whether all cores are active. [Elektroda, Kasek21, post #16998751]

How do I re‑enable all CPU cores in Windows?

Use msconfig: Win+R → msconfig → Boot → Advanced options → check Number of processors → select 4 → OK → restart. Verify with Task Manager or HWiNFO that four cores appear. If the option lists only one, check BIOS to ensure all cores are enabled. "Yes, only one core is detected" signals this exact misconfiguration. [Elektroda, Kasek21, post #16998751]

How can I tell if it’s Windows or hardware?

Boot a Linux live USB. If Linux shows four cores and games run well, hardware is fine. That isolates Windows settings or files as the cause. A forum expert suggested this quick test before reinstalling. It avoids needless part swaps and confirms configuration issues. [Elektroda, 310artur, post #16998902]

Linux shows 4 cores and CS:GO runs great—what does that prove?

It proves the CPU and board are healthy. The issue lies in Windows configuration or drivers. The poster confirmed four selectable cores and smooth gameplay under Linux. That points to misapplied tweaks or registry cleaners on Windows. Restore defaults or reinstall Windows to fix it. [Elektroda, bnx1122, post #16999997]

HWiNFO shows only one core on my FX‑4100—what now?

Windows is only enumerating one core. Revisit msconfig’s Number of processors and set it to 4. If unavailable, check BIOS core settings and power plan defaults. After reboot, confirm HWiNFO and Task Manager list all cores. "Yes, only one core is detected" matched this scenario. [Elektroda, Kasek21, post #16998751]

Which logs help diagnose sudden FPS drops?

Collect FRAPS FPS overlay, HWiNFO64 sensor logs, and a Process Explorer screenshot. Log at least 20 minutes of gameplay. These show CPU cores, clocks, temps, and which process spikes. Share the packed HWiNFO log for review. This workflow quickly isolates thermal, power, or core-detection faults. [Elektroda, Kasek21, post #16996673]

Can changing CPU power states to 100% hurt performance?

Yes. Forcing minimum and maximum processor states incorrectly can break boost behavior or lock clocks oddly. One helper asked if CPU states were set to 100% and advised reverting power settings to default. Reset your power plan to Balanced defaults and retest. [Elektroda, safbot1st, post #17000042]

Do tools like CCleaner cause issues here?

They can. A responder noted CCleaner sometimes “messed up,” and the OP suspected it caused missing options. Registry and cleanup tools may remove needed entries or settings. If used just before the problem, restore or reinstall to undo damage. [Elektroda, 310artur, post #16996230]

sfc /scannow didn’t help and admin mode didn’t change cores—what next?

If SFC finds nothing and a hidden Administrator account still shows one core, deeper damage exists. At that point, restoring from a point or reinstalling Windows is faster. This edge case confirms that system files alone aren’t the culprit. Back up and plan a clean install. [Elektroda, bnx1122, post #17000198]

Should I use a restore point or just reinstall Windows?

If you have a restore point from before the tweaks, use it first. It’s usually the fastest resolution. Without restore points, a clean reinstall is the most reliable path to undo broad changes. Create restore points before future tweaks. [Elektroda, Kasek21, post #17000072]

Why does one app show 80–90% CPU while games stutter?

A misconfigured system can shift load to a single core, making one process spike. The OP saw an application at 80–90% and poor FPS. With only one core active, any task saturates the CPU. Re‑enable all cores and reset power settings to balance load. [Elektroda, bnx1122, post #16998672]

Is this a hardware failure?

Unlikely if Linux shows four cores and games run fine. That test exonerates the CPU, RAM, and motherboard. Focus on reversing Windows tweaks, driver cleanup, or reinstalling. Hardware diagnosis comes after OS confirmation. "Run some Linux from a pendrive" remains a solid step. [Elektroda, 310artur, post #16998902]

Quick 3‑step how‑to: restore all cores and verify

  1. Win+R → msconfig → Boot → Advanced options → check Number of processors → pick 4 → OK.
  2. Reboot, then confirm four cores in Task Manager (Performance → CPU) or HWiNFO.
  3. If option unavailable, enable all cores in BIOS and repeat verification. [Elektroda, Kasek21, post #16998751]

What’s the fastest way to get back to stable 60 FPS?

Undo the video’s changes, restore defaults in power plan, and re‑enable all cores. If you lack restore points and fixes fail, reinstall Windows. Many users regain smooth play immediately after these steps. “Put the system back when you can’t undo the changes.” [Elektroda, 310artur, post #16996230]
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