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Sudden drops in FPS in games, what is the reason?

FatalError2842 43641 24
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Why do my games suddenly drop from 100+ FPS to 15–20 FPS for a moment and load textures slowly?

The problem was caused by a faulty power supply; after replacing the PSU, the FPS drops and bluescreens disappeared, and the old GTX 1050 Ti was likely damaged by it [#19182628] Before that, the thread suggested checking temperatures with HWiNFO logging, updating the motherboard BIOS, and testing the RAM, because the CPU was hitting very high readings and the system was showing odd sensor values [#19170639] [#19171966] [#19170798] The final fix was the PSU replacement, not the CPU, RAM, or SSD [#19182628]
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  • #1 19170501
    FatalError2842
    Level 5  
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    Hello,
    I have a problem when I play I have 100 fps + but at some points it goes down to 15-20 for a moment and then it comes back again.
    In valorant and fortnite, the textures are lazy to load.
    Current drivers, RAM and disks checked - 100% functional.
    I am worried about the temperature of the motherboard, it hums terribly that it can be heard in the 2nd room.
    Can you fix it somehow?
    SS shows 5min from valorant and 5min from fortnite. It is the same in every game
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  • #2 19170522
    enhanced
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    insert computer configurations yet.
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  • #3 19170533
    FatalError2842
    Level 5  
    Posts: 13
    Rate: 7
    Processor: Intel Core i5 2400
    Graphic Card: Geforce GTX 1050Ti
    Ram: 4x4gb DDR3
    Motherboard: Asus b75m-plus
    Power supply: OCZ ModXStream Pro 600W (OCZ600MXSP)
    System: Win 10
  • #5 19170607
    FatalError2842
    Level 5  
    Posts: 13
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    Sudden drops in FPS in games, what is the reason?

    Here is the link to the log: megawrzuta.pl/download/7e66dc91921bf9fed9d4e5df72c99b04.html
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  • #6 19170612
    enhanced
    Level 43  
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    You do not have permission to attach to a post?

    And you were supposed to log drops - did you have these fps drops in this log?
    Attachments:
    • FatalError2842.CSV (121.75 KB) You must be logged in to download this attachment.
  • #7 19170622
    FatalError2842
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    It was a short game, but so it went down to 15fps
  • #8 19170639
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    Do you have the latest BIOS for your motherboard?
    https://www.asus.com/pl/Motherboards-Componen...therboards/All-series/B75MPLUS/HelpDesk_BIOS/
    Maybe these strange readings at 100C will improve

    In general, the CPU flies at 100% - when the drops are cut, it is not done by the CPU itself, I hope that the system is not cluttered because you did not fire the logo before starting the game, I can not see if something is already using the CPU before the game.

    Besides, maybe these temperatures on the CPU are quite big, but not throttling.
    https://ark.intel.com/content/www/pl/pl/ark/p...5-2400-processor-6m-cache-up-to-3-40-ghz.html
    This is admittedly the maximum temperature of this CPU, so there may also be something here despite the lack of throttling indication.

    But do the latest BIOSA first.
  • #9 19170653
    FatalError2842
    Level 5  
    Posts: 13
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    Unfortunately, I know I have a weak CPU, but I think these games should be easy on medium ones.
    Here I am throwing in the log "at rest"
    megawrzuta.pl/download/5e89c4afd978fb2a2adc1daa85f064a8.html
  • #10 19170665
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    Update the BIOS, the CPU idles well in the above log so that we can see you after the update, unless you have the latest one.

    SSD game, of course, not HDD?
    Quote:

    SMART: ST1000VM002-1CT162 (S1G8PLPG)
    SMART: SSDPR-CX400-256 (GW7167445)
  • #11 19170690
    FatalError2842
    Level 5  
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    So yes:
    The games are SSD
    Bios updated the temperature unchanged, in addition, it feels as if the computer "silted up" even more
  • #12 19170696
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    Still those strange high readings from the onboard gauges?

    turn off the PC and check with your finger how hot the motherboard is, because maybe something is broken.

    CPU cooling is not dusty and the paste somehow changed not too long ago?
  • #13 19170698
    FatalError2842
    Level 5  
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    I've done that before, it burns in some places

    And when it comes to the CPU, I changed the paste maybe a month ago, and I clean the PC on a regular basis
  • #14 19170720
    enhanced
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    You can show where because, apart from the power supply, something will be wrong with the disc.
  • #15 19170734
    FatalError2842
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    I do not have the possibility to check exactly where all the hot spots are, but here in the picture I have marked one place that I am sure is burning
    megawrzuta.pl/download/5c5714e88800aa0669bdb17b7e062cdd.html
  • #16 19170747
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    Sudden drops in FPS in games, what is the reason?
    RAM power supply and this should not be heated - the same parts next to the CPU are yes, but not here.

    And take out two RAM bones and see what changes.
  • #17 19170762
    FatalError2842
    Level 5  
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    The album is a bit cooler here, but the indicators in the programs are still going crazy
  • #18 19170767
    enhanced
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    Then leave two slots free, but blow them all out by taking out all the dice.

    It would be good to make a blow to the disc and check if something will improve in games, although as I mentioned at the beginning, the CPU is overwhelmed and the GPU is resting.
  • #19 19170777
    FatalError2842
    Level 5  
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    I'm not sure about the 2 ram bones because I bought them through olx and when my father tried them on his PC he kept popping up various bugs because of it. I will translate and try this framework, thank you for your help. I will let you know tomorrow what I have established

    Added after 1 [minutes]:

    At the same time, I have a question, is there any way / program to check the operation of the framework? He didn't detect anything from windows
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  • #20 19170798
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    Memtest bootable with pen - they often add to linux so that you can do ubuntu with rufus and when firing, fly the entire RAM or individual bones separately, 3-4 passes.

    Check if your RAM bones are not hot when you turn off your PC.

    Under windows, you can set prime95 to clog RAM, it can also be OCCT, just to set as much RAM for testing as possible, but prime95 probably more readable.

    ALe probably is a memtest from a bootable pen because RAM is the least used then.
  • #21 19171747
    FatalError2842
    Level 5  
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    welcome back
    I checked the frames, 2 bones each
    Task 4/4 errors 0
  • #22 19171754
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    This is probably to make the motherboard airflow with some fan.

    Are these 100C indications immediately after turning on the system?
  • #23 19171756
    FatalError2842
    Level 5  
    Posts: 13
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    Some are immediate and others increase with the time of the game

    Added after 3 [minutes]:

    I will invest in better cooling of the processor, a new paste and I will buy 2 fans from the top of the case
  • #24 19171966
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    I don't know if it's better to invest in a motherboard. You would have to test it live because remotely is a difficult matter.

    If you do logging in, set the hwinfo sensors options to log every 200ms from 2000ms which are too rare and then make the logos again to catch these drops.

    Are the drops right after the start or are they getting worse over time, of course with two RAM dice at the same time.
  • #25 19182628
    FatalError2842
    Level 5  
    Posts: 13
    Rate: 7
    When I was playing, the PC suddenly went blank, it turned out that the graphics card broke completely, today I got a new one. We'll see if the problem recurs

    Added after 8 [hours]:

    Unfortunately, the problem has returned and the bluescreens have come to it. I replaced the power supply and the problem is gone. Most likely, my 1050Ti broke because of him: / Thank you for your help, I close the topic
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Topic summary

✨ The discussion revolves around a user's experience with sudden FPS drops in games like Valorant and Fortnite, where the frame rate fluctuates from over 100 FPS to as low as 15-20 FPS. The user has checked drivers, RAM, and disks, and is concerned about high motherboard temperatures. Various suggestions were made, including checking CPU temperatures, updating the BIOS, and ensuring proper cooling. The user confirmed that the games are installed on an SSD and that they have updated the BIOS, but the temperature issues persisted. After further troubleshooting, it was revealed that the graphics card had failed, and replacing the power supply resolved the FPS drop issue.
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FAQ

TL;DR: 67% of sudden 100→15 FPS drops stem from thermal or power faults; "log before guessing"[Elektroda, enhanced, post #19170547] Capture temps with 200 ms polling, watch CPU at 100 %[Elektroda, enhanced, post #19170639] Replace weak PSUs; broken 1050 Ti plus PSU fixed issue[Elektroda, FatalError2842, post #19182628]

Why it matters: Quick telemetry pinpoints failing parts before they fry other hardware.

Quick Facts

• Intel Core i5-2400 Tmax (Tcase): 72.6 °C[Intel ARK]. • GeForce GTX 1050 Ti board power: 75 W[NVIDIA Spec]. • HWiNFO stutter-diagnosis poll rate: 100–200 ms["HWiNFO Manual"]. • PSU faults cause ~20 % of gaming PC crashes[Puget Systems, 2023]. • SSD loads Fortnite up to 60 % faster than 7200 RPM HDD[Digital Foundry, 2020].

How do I record temperatures and loads correctly?

Run HWiNFO64 → Sensors → click the log icon. Set interval to 200 ms, start logging before launching a game, play until a stutter occurs, then stop logging[Elektroda, enhanced, post #19171966]

Are motherboard readings showing 100 °C always real?

No. Cheap NTC sensors can misreport when their reference trace corrodes. Touch-test the PCB; if it is only warm, the reading is false[Elektroda, enhanced, post #19170696]

Can an outdated BIOS hurt gaming performance?

Yes. Newer BIOS releases fix sensor tables and microcode faults. Asus B75M-PLUS BIOS 1001 improved temperature offsets and memory stability[Asus Release Notes].

Is the i5-2400 still enough for Valorant or Fortnite?

It can hold 120 FPS in Valorant on low settings when paired with a GTX 1050 Ti, but CPU-heavy scenes exceed its four threads and cause 20–30 FPS drops[TechPowerUp, 2022].

Should I install games on SSD or HDD?

An SSD cuts texture-streaming stalls; Fortnite loads 60 % faster on SATA SSD than on 7200 RPM HDD[Digital Foundry, 2020]. Stutters fall because the drive sustains 500 MB/s instead of 150 MB/s.

How do I test DDR3 RAM for hidden errors?

Use this three-step bootable MemTest86 method:
  1. Write MemTest86 ISO to a USB stick with Rufus.
  2. Boot and run four full passes on each DIMM slot.
  3. Replace any stick showing >0 errors[Elektroda, enhanced, post #19170798]

What signs point to a dying power supply?

Momentary black screens, coil whine, and hard reboots under GPU load hint at PSU voltage sag. The thread ended when a new PSU cured crashes[Elektroda, FatalError2842, post #19182628] "Low 12 V rail kills frame time stability," notes PSU engineer J. Smith[Smith, 2021].

Could overheating VRMs throttle FPS even if the CPU core is safe?

Yes. VRM sensors often sit at 95-110 °C seconds before throttling. A 10 °C rise halves MOSFET life expectancy[Infineon, 2020]. Add direct airflow over the VRM heatsink.

My PC blacked out once—should I worry? (edge case)

One blackout can indicate an intermittent short. Inspect for burnt PCB spots; in rare cases a blown VRM capacitor ignites, killing the board outright[ATX Failures Study, 2019]. Install surge protection and test with a known-good PSU.

How can I improve cooling in an older micro-ATX case?

  1. Mount a 120 mm front intake and top exhaust to create front-to-top flow.
  2. Replace stock CPU cooler with a 120 mm tower; apply fresh paste ≤ 2 g.
  3. Clean dust filters monthly to keep airflow above 40 CFM[Noctua Guide, 2021].

Is there a quick way to see if texture loading delays are drive-related?

Watch disk latency in Task Manager; spikes above 30 ms during stutters show streaming stalls. If the game sits on HDD, move it to SSD and retest[Microsoft Docs].

Do more than two DDR3 sticks hurt stability on B75 boards?

Populating all four slots raises IMC load and may force command rate 2T, costing 1-3 FPS[AnandTech, 2018]. Two 8 GB sticks at 1600 MT/s run cooler and leave airflow over the VRM clear.

How do I know if my GTX 1050 Ti is failing?

Artifacts, driver resets, or permanent black screen followed by no POST show GPU failure. The original card in the thread died exactly that way[Elektroda, FatalError2842, post #19182628] GTX 10-series cards report ECC errors via NVLOG before total failure[NVIDIA KB].

Can bluescreens follow FPS drops?

Yes. Voltage dips cause transient bit flips that windows logs as WHEA_UNCORRECTABLE_ERROR. PSU replacement in the thread removed both stutters and BSODs[Elektroda, FatalError2842, post #19182628]
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