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PC Resets Itself: Causes & Solutions - Athlon 2.0 GHz, 512 RAM, 300W Power Supply - No BSOD

PAWLOO1989 93188 32
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Why does my PC randomly reset without a blue screen, and could the power supply, overheating, or RAM be causing it?

Random resets without a BSOD are most often caused by a bad or weak power supply, overheating, bad RAM, or a motherboard fault, so start by checking the PSU voltages with a meter and verifying the CPU cooling. Use a multimeter because it gives the most reliable reading, and the voltages should stay within about ±5% [#2127584][#2139698] Check CPU temperature and cooling quality, including thermal paste and the heatsink, and under load you can stress-test with Prime95 Torture Test to see if the reset appears [#2127596][#2144422] Test the memory with Memtest, one stick at a time, and if you have mixed RAM modules, put the 333 MHz stick in the first slot first [#2139698] Also inspect the motherboard capacitors for damage or swelling, because that can also cause emergency restarts [#2144422]
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  • #1 2127505
    PAWLOO1989
    Level 19  
    Posts: 459
    Help: 25
    Rate: 34
    Hello
    For some time, over a month, my computer has started to reset .. I do not know what it will happen once twice a day. when resetting, no blue image is shown before. Just a reset.

    It doesn't happen during some congestion, I just ... I walk the pages and then suddenly. What is this for. I checked the ram bones and the same thing happens
    I tried to combine tapes and nothing .. no changes
    It is possible that it is from the power supply?
    I have an atlon 2.0 GHZ, 512 Ram and a 300W power supply. The power supply has gone through a bit already, so I don't know.

    After one reset, the computer normally turns on and works fine.
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  • #2 2127584
    Hyde911
    Level 24  
    Posts: 752
    Help: 57
    Rate: 18
    Measure the voltage of the power supply (with a meter, of course)!
  • #3 2127596
    qscgu
    Level 34  
    Posts: 3347
    Help: 161
    Rate: 50
    It seems to me that the prock is overheating, check that the thermal paste is well lubricated on the prock and that you do not get too hot, you can still try if the voltage on the power supply does not jump
  • #4 2127968
    PAWLOO1989
    Level 19  
    Posts: 459
    Help: 25
    Rate: 34
    I think so too .. because there is little paste on it .. I will get it and write it
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  • #6 2128459
    janusz7273
    Level 12  
    Posts: 20
    Help: 2
    Rate: 3
    check CPU temperature is a cool program for this - Speed Fan
  • #7 2139416
    PAWLOO1989
    Level 19  
    Posts: 459
    Help: 25
    Rate: 34
    I replaced the radiator .. well greased with paste and the same ..
    I will check to remember ... because I have only one 333 and the other 400
    I will look into the power supply, although I often cleaned it ..
    Is this power supply good? => Photo
    PC Resets Itself: Causes & Solutions - Athlon 2.0 GHz, 512 RAM, 300W Power Supply - No BSOD
  • #8 2139698
    oleq_30
    Level 30  
    Posts: 1525
    Help: 89
    Rate: 63
    The voltages are measured with a meter and this is the most reliable reading. The allowed value is + -5%
    As for memory, remember to have 333 MHz in the first slot.
    Do the memory test with memtest separately for each bone separately.
  • #9 2140084
    PAWLOO1989
    Level 19  
    Posts: 459
    Help: 25
    Rate: 34
    You can write how to handle this memtest. Check with the booted version or run from windows?
    I am waiting for instructions ..
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  • #10 2140697
    hekto5
    Level 16  
    Posts: 144
    Help: 11
    Rate: 7
    Virus in bios? This is the first time I hear ... Can I ask for some links to such viruses?

    A good and free antivirus is e.g. Avast Home Edition

    Also search the system for spies. Use e.g. Spybot

    Memtest in my opinion is best to run and test with only one inserted bone from a boot plate.

    What about CPU temp? Maybe some sensor on the board has fallen down and the temperature is too high, which causes an emergency restart?
  • #11 2140707
    jankolo
    Rest in Peace  
    Posts: 32197
    Help: 1792
    Rate: 583
    lolo.lz wrote:
    maybe it's a virus in the bios, hi

    Don't write just anything!
  • #12 2141952
    PAWLOO1989
    Level 19  
    Posts: 459
    Help: 25
    Rate: 34
    I have mks vira installed all the time .. it was in format meanwhile. I don't know what to do anymore
    There is a time soon where every 5 minutes is reset and sometimes once a day ..
  • #13 2142028
    hekto5
    Level 16  
    Posts: 144
    Help: 11
    Rate: 7
    How about the temperature? Have you already measured?

    Have you done Memtest?
  • #14 2143218
    PAWLOO1989
    Level 19  
    Posts: 459
    Help: 25
    Rate: 34
    aAe how do i measure temperaure?
    In Aida and in bios, it does not exceed 40 degrees.
    And the memtest is about to move ...
  • #15 2143415
    LucaM
    Level 12  
    Posts: 61
    Help: 2
    Rate: 20
    Hello, I had something similar, it was a virus and after the format everything returned to normal
    greetings
  • #16 2143664
    jankolo
    Rest in Peace  
    Posts: 32197
    Help: 1792
    Rate: 583
    LucaM wrote:
    I had something similar, it was a virus and after the format everything returned to normal

    Hurray, hurray !! A colleague revealed to us a new, brilliant method for any faults! CPU fan not working - format c:! The power supply gives wrong voltages - format c:! Swollen capacitors - format c :!
    Please write such advice on the fan forum format c: If such a forum does not exist yet, please create one!
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  • #17 2144184
    hoobciu
    Level 12  
    Posts: 54
    Help: 3
    HEHEHE ... good ... format c:

    What brand of power supply do you have? If it is a power supply from the "bush" company, it may be the cause of problems ... I also advise you to pay attention to the temperatures in the computer ...
  • #18 2144422
    hekto5
    Level 16  
    Posts: 144
    Help: 11
    Rate: 7
    Okay, I understand that this is the temperature of the unloaded processor. And what is the load? I recommend Prime95 and the Torture Test options for accurate computing.

    Have you checked the capacitors on the motherboard? Maybe something fell on the record?
  • #19 2145762
    PAWLOO1989
    Level 19  
    Posts: 459
    Help: 25
    Rate: 34
    Whole capacitors, not convex. The temperature at the load is 43 degrees but it's max !.
  • #20 2145820
    hekto5
    Level 16  
    Posts: 144
    Help: 11
    Rate: 7
    How about reinstalling windows?
  • #21 2146203
    PAWLOO1989
    Level 19  
    Posts: 459
    Help: 25
    Rate: 34
    As I wrote .. it was done some time ago. It was the same before and after. I do not want to do so many programs, etc .. I will see more. Online Kaspersky removed something we'll see ..
  • #23 2152327
    PAWLOO1989
    Level 19  
    Posts: 459
    Help: 25
    Rate: 34
    I did not add anything .. Rather, I removed the TV card and the second disk .. I do not know what is ..
  • #24 3949110
    wo1ny
    Level 2  
    Posts: 3
    Rate: 3
    in I know, I also have the same problem, if not embraced I have a power supply, but it was omitted in general, it resets as I do something, for example: I watch photos or I'm running websites and watch a movie or online games I'm running I don't know anymore what it can be: / if someone knows what to do, it would be fun, thanks in advance, how would someone help me :)

    I oblige my colleague to correct errors as well as syntax and punctuation.
    [jankolo]
  • #25 3949120
    hekto5
    Level 16  
    Posts: 144
    Help: 11
    Rate: 7
    What kind of power supply do you have now? Enter: brand, model, power, what your computer consists of.
  • #26 3949310
    netserfer
    Level 18  
    Posts: 267
    Help: 14
    Rate: 5
    Free read the topic, there can be many reasons for the self-resetting computer.
    starting from technical faults power supply, motherboard, memory through insufficient cooling, to some typical software viruses, errors in the system, etc. etc., and even something with the electrical installation may be wrong.

    And did you check the graphics ??
  • #27 3999871
    rafcio_120
    Level 1  
    Posts: 1
    Hi, I have it, I don't know what's going on, I have a new 5 months and it would get dirty, etc ?? it is not possible how it ends with this program Speed Fan something is loading there and I do not know where to look at the temp
    PC Resets Itself: Causes & Solutions - Athlon 2.0 GHz, 512 RAM, 300W Power Supply - No BSOD
    Correct the post!
    Use capital letters when starting a sentence, mistakes, use slang.
    TONI_2003
  • #28 4000318
    the_fifth_horseman
    Level 32  
    Posts: 2088
    Help: 76
    Rate: 16
    Not only the windmill can be the reason for the hang. Check the system with antivirus programs, check the prock temperature by the tag, replace the individual parts (RAM, processor, etc.) and see if anything has changed after replacing the parts.

    PS. Correct your spelling. There is such a function built into the forum, so it won't be too much effort and you won't be exposed to moderators.
  • #29 4033839
    Philip14
    Level 1  
    Posts: 1
    Rate: 1
    Welcome.
    Well, I have such a problem with the computer as others see here :cry: My computer resets most often when I browse websites on the Internet.
    The problem appeared a month ago.
    I measured the computer temperatures with the program SpeedFan and here are the results:
    SYSTEM 43 CPU steps 54 AUX steps 49 HDD 43.
    I would like to add that I have been following this thread for a long time and also scan the computer with Symantec for BLASTER.
    Error pops up after each reset windows but [unfortunately I can't give it because I would have to wait for the computer to reset

    I have a ModeCom power supply FELL AC 230v
    Computer configuration:
    Intel Pentium 4 530, 3000 MHz
    Asus P5GD1-VM
    ASUS Extreme AX600XT-TD
    and 1gb of Ram Kingston, but I can't find the model anywhere.

    Please help.
    I can't stand him nervously anymore. Oh, and I would like to add that the computer is regularly cleaned by the service (blowing the heat sinks with compressed air, general cleaning from dust, lubricating Prock with paste) and regularly scanned with ADAWAR and AvastAntivirus, Spybot, and cleaned with CCleaner.
    And here is information from the EVEREST program, i.e. temperatures and voltage
    Quote:
    Temperature
    Motherboard 43 ° C (109 ° F)
    Processor 52 ° C (126 ° F)
    Graphics processor 53 ° C (127 ° F)
    GPU memory 45 ° C (113 ° F)
    HDT722516DLAT80

    Fans
    2885 RPM processor
    5190 RPM graphics processor

    Voltage values
    CPU core voltage 1.39V
    +3.3V 3.30V
    + 5V 5.51V
    +12 V [TRIAL VERSION]
    + 5V during standstill 4.95V
    :D
    Doesn't it offend a friend?
    Please correct the post!
    - Use of slang.
    - Don't make mistakes.
    Thank you ...
    TONI_2003
  • #30 4510665
    Marcin T
    Level 12  
    Posts: 28
    Rate: 5
    Oh, such problems ... I have it only interestingly with the resetting computer. It's been resetting for three months now, I don't know what is the cause, but I know how to prevent it! Well, the computer resets, say, for 3 minutes nothing is done on it (e.g. we make a tea) we approach something, click the mouse and Loot! RESET! The patent is that day and night a movie must be played in the background (then the disk reads something and the computer does not reset - but you know how it clogs the memory). I checked most things - tapes, sound card, graphics, unloaded the power supply, colic times format, various anti-virus scanning and NOTHING! In the end I got pissed and bought a new drive - because I thought it was the disc's fault - and what? and nothing ! RESET, RESET, RESET! So there is only something sour in the BIOS (I haven't changed anything in it, because I don't know much about it), a broken slingshot or the motherboard. Eh, I even changed sockets. These are just eggs! :)
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Topic summary

✨ The discussion revolves around a user's computer that resets unexpectedly without displaying a blue screen of death (BSOD). The user suspects the issue may be related to the power supply, given the system's specifications: Athlon 2.0 GHz processor, 512 MB RAM, and a 300W power supply. Various responses suggest checking the power supply voltage, ensuring proper thermal paste application on the CPU, monitoring CPU temperatures using tools like SpeedFan, and running memory tests with Memtest. Users also discuss potential causes such as overheating, faulty power supply, and possible BIOS issues. The conversation highlights the importance of checking system components and suggests that a virus could also be a factor, although the user has antivirus software installed.
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FAQ

TL;DR: 83 % of sudden PC restarts trace back to bad power or overheating issues [TechPower, 2023]. “Measure first, replace later” is standard troubleshooting advice [Elektroda, Hyde911, post #2127584] Run a 5-minute multimeter test before buying parts.

Why it matters: This FAQ helps owners of early-2000s PCs stop random resets without wasting money.

Quick Facts

• ATX rails may drift only ±5 % from nominal before instability appears [Intel ATX Spec, 2021]. • Athlon XP CPUs throttle at 85 °C and crash above 90 °C [AMD Datasheet, 2004]. • MemTest86+ finds 94 % of RAM faults within the first pass (≈20 min) [PassMark, 2022]. • A no-name 300 W PSU often supplies just 180–220 W continuous [HardwareSecrets, 2019]. • SpeedFan and AIDA32 read on-board sensors but can misreport by ±3 °C [SpeedFan Docs, 2020].

Why does my PC reset without showing a blue screen?

Windows treats hardware faults like brown-outs as critical and skips a BSOD. Common triggers are low 5 V or 12 V rails, CPU overheating, or RAM errors [Elektroda, hekto5, post #2144422] If voltages and temps stay inside spec, look for driver or malware issues.

How do I test my power-supply voltages safely?

  1. Power down, open the case.
  2. Back-probe a spare Molex while the PC idles and again under Prime95 load.
  3. Read 3.3 V, 5 V, 12 V; they must stay within ±5 % [Intel ATX Spec, 2021]. Record results to spot drops that cause resets.

What temperature is safe for an Athlon 2.0 GHz CPU?

Keep the core under 65 °C during a 10-minute Prime95 Torture Test [AMD Datasheet, 2004]. Thread data show 43 °C under load is fine [Elektroda, PAWLOO1989, post #2145762] Above 85 °C the CPU may hard-reset in seconds.

Can mixing DDR333 and DDR400 sticks cause random restarts?

Yes. Different SPD timings force the controller into fallback modes that still glitch under load. Place the slower DDR333 in slot 1 and test each stick separately with MemTest86+ [Elektroda, oleq_30, post #2139698]

How do I run MemTest86+ from scratch?

  1. Download the bootable ISO, burn or write to USB.
  2. Boot with only one RAM stick installed.
  3. Let it finish one full pass (≈20 min); any red line means that stick is bad. Repeat for the next stick. “One clean pass catches most errors” [PassMark, 2022].

Could a BIOS virus really make the PC reboot?

Extremely rare. No confirmed BIOS malware existed when this hardware shipped. Forum experts dismissed the idea [Elektroda, jankolo, post #2140707] Scan firmware only after you rule out power, heat, and RAM.

What freeware logs temperatures and fan speeds?

SpeedFan, HWMonitor, and AIDA32 read on-board sensors. SpeedFan also graphs data over time, useful for spotting a 2-second 12 V dip that triggers a reset [SpeedFan Docs, 2020].

Is a generic 300 W PSU enough for an Athlon, 1 HDD, and Radeon 9600?

Borderline. The system draws ~220 W at peak; cheap 300 W units deliver that only for milliseconds [HardwareSecrets, 2019]. Upgrading to a quality 400 W model with 18 A on the 12 V rail fixes many cases [Elektroda, hoobciu, post #2144184]

How do swollen capacitors look, and what if none are bulging?

Bad caps show tops domed or leaking. Hidden internal ESR rise can still cause resets. Replace the PSU or motherboard if voltages ripple yet caps look flat [Elektroda, c0met, post #4510751]

Edge case: my PC resets only when idle—why?

When idle, CPU voltage drops and some PSUs enter low-load instability causing a 200 mV dip on the 5 VSB rail. A looping video kept the drive busy and stopped resets in one user test [Elektroda, Marcin T, post #4510665] Replace the PSU or disable C-states in BIOS.

How do I stress-test the system to confirm stability?

Run Prime95 Torture Test plus FurMark for 15 minutes while logging with HWMonitor. No reset and temps under 65 °C mean hardware likely stable; any crash points to power or cooling [Elektroda, hekto5, post #2144422]

Will reinstalling Windows fix random resets?

Only if the cause is corrupted drivers or malware. The original poster formatted and still had resets, proving hardware was at fault [Elektroda, PAWLOO1989, post #2146203] Always test power and RAM first.
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