រលាយខ្សែថាមពល GPU ផ្សែងការផ្គត់ផ្គង់ថាមពល និងភ្លើងអគ្គិសនីកុំព្យូទ័រ¶

កុំព្យូទ័រលេងហ្គេម និងស្ថានីយការងារទំនើបៗ ថាមពលអគ្គិសនីពី 600 ទៅ 1,600 វ៉ាត់ តាមរយៈឧបករណ៍ភ្ជាប់បង្រួម និងម៉ូឌុលនិយតករតង់ស្យុងដង់ស៊ីតេខ្ពស់។ នៅពេលដែលឧបករណ៍ផ្គត់ផ្គង់ថាមពលចម្បងមួយ (PSU) ផ្ទុះដោយគ្រាប់កាំភ្លើង 16-pin 12VHPWR ឬ 12V-2x6 ខ្សែកាតក្រាហ្វិករលាយពីភាពធន់នឹងទំនាក់ទំនងខ្ពស់ ឬ MOSFET ខ្លីបញ្ឆេះផ្សែង fiberglass ខាងក្នុងករណី សកម្មភាពភ្លាមៗរបស់អ្នកកំណត់ថាតើអ្នករក្សាទុកផ្នែករឹងរបស់អ្នក និងការពារភ្លើងក្នុងបន្ទប់។

ធ្វើដូចនេះឥឡូវនេះ¶

1. ** ទាញខ្សែភ្លើង AC ត្រង់ចេញពីព្រីជញ្ជាំង ឬត្រឡប់ឧបករណ៍បំបែកសៀគ្វីក្នុងបន្ទប់។** កុំសង្កត់ប៊ូតុងថាមពលរបស់ស្រោម Windows ខាងលើ (ដែលចំណាយពេល 4 វិនាទី ហើយទុកផ្លូវដែក 5V រង់ចាំបន្តផ្ទាល់) ហើយកុំប៉ះតួកុំព្យូទ័រដែក ប្រសិនបើអ្នកសង្ស័យថាមានចរន្ត AC ខ្លី។ ដកដោតចេញពីរន្ធជញ្ជាំង ឬកុងតាក់ការពារការកើនឡើងជាមុនសិន។
2. កុំបាញ់ទឹក ពពុះ ឬបំពង់ពន្លត់អគ្គីភ័យ ABC ម្សៅពណ៌លឿងធម្មតា ទៅក្នុងកុំព្យូទ័រដែលជក់បារី លុះត្រាតែមានអណ្តាតភ្លើងគំរាមកំហែងដល់បន្ទប់។ នៅពេលដែលភ្លើងជញ្ជាំង AC ត្រូវបានកាត់ 95 ភាគរយនៃចរន្តអគ្គិសនីរបស់កុំព្យូទ័រនឹងពន្លត់ដោយខ្លួនឯងក្នុងរយៈពេល 10 វិនាទី។ ប្រសិនបើអណ្តាតភ្លើងចំហបន្តឆេះផ្លាស្ទិចនៅខាងក្នុងស្រោម សូមប្រើភ្នាក់ងារសម្អាត កាបូនឌីអុកស៊ីត (\(CO_2\)) ឬឧបករណ៍ពន្លត់ Halotron Class C។ ប្រើតែឧបករណ៍ពន្លត់អគ្គីភ័យ ABC ដែលមានជាតិគីមីស្ងួត ប្រសិនបើអគ្គីភ័យគំរាមកំហែងដល់ការរាលដាលដល់វាំងនន ឬគ្រឿងសង្ហារឹម ហើយទូរស័ព្ទទៅតំបន់របស់អ្នក លេខសង្គ្រោះបន្ទាន់ (911 នៅសហរដ្ឋអាមេរិក និងកាណាដា 112 នៅទូទាំងសហភាពអឺរ៉ុប 999 នៅចក្រភពអង់គ្លេស) ។
3. Evacuate and ventilate the room immediately if you smell sweet, fishy, or acrid chemical fumes. Blown electrolytic capacitors vent heated electrolyte vapor, and burning FR-4 motherboard fiberglass and PVC cable jackets release toxic hydrogen chloride, brominated flame retardants, and carbon monoxide. Open exterior windows and do not breathe the plume.
4. កុំចុចប៊ូតុងថាមពលជាលើកទីពីរ ដើម្បី "មើលថាតើវាចាប់ផ្ដើមឬអត់" បន្ទាប់ពីការលេចចេញ ផ្កាភ្លើង ឬបិទភ្លាមៗ។ ប្រសិនបើសៀគ្វីការពារការផ្គត់ផ្គង់ថាមពល (OCP, OVP, ឬ SCP) ទើបតែបានរក្សាទុកកាតក្រាហ្វិក ឬ motherboard របស់អ្នកពីការស្លាប់ខ្លី ដោយចុចប៊ូតុងថាមពលម្តងទៀត បង្ខំឱ្យមានការកើនឡើង 50-amp លើកទីពីរឆ្លងកាត់ស៊ីលីកុនខ្លី ហើយផ្ទុះរណ្ដៅកាបូនអចិន្រ្តៃយ៍តាមរយៈបន្ទះសៀគ្វី។
5. ទុក​ដុំ​ភ្លើង GPU ដែល​រលាយ​មិន​ត្រូវ​ប៉ះ ហើយ​ភ្ជាប់​ជាមួយ​នឹង​កន្លែង​រហូត​ដល់​អ្នក​ថត​រូប​ម៉ាក្រូ។ បើ 12VHPWR, 12V-2x6ឬឧបករណ៍ភ្ជាប់ PCIe 8-pin បានភ្ជាប់ខ្លួនវាទៅនឹងបឋមកថាកាតក្រាហ្វិករបស់អ្នក ដោយព្យាយាមគោះវាចេញដោយប្រើដង្កាប់បិទភ្ជាប់សន្លាក់ PCB ហើយការធានាទុកជាមោឃៈ។ ថតរូបចុងទាំងពីរនៃខ្សែ និងចន្លោះកន្លែងអង្គុយជាមុនសិន។
6. Never open the metal housing of a Power Supply Unit (PSU). Even hours or days after being unplugged from the wall, the large primary high-voltage bulk capacitors inside a desktop PSU store 320 to 400 volts of lethal direct current (DC) capable of causing fatal ventricular fibrillation if touched with a screwdriver or finger.

Emergency triage workflow: bang, smoke, or melting smell¶

Use this diagnostic flowchart to identify which component failed without risking electrocution or secondary hardware destruction.

flowchart TD
    A["PC Electrical Emergency: Pop, Smoke, or Burning Smell"] --> B["Unplug AC Cord from Wall Outlet & Disconnect Monitor Cables"]
    B --> C{"Are there active flames inside the PC chassis?"}
    C -->|"Yes: Open Flames Persist After Unplugging"| D["Use CO2 / Class C Extinguisher; Evacuate & Call Emergency Number if Spreading"]
    C -->|"No: Smoke Stopped When Unplugged"| E["Ventilate Room for 15 Mins; Do NOT Press Power Button Again"]
    E --> F{"Where did the sound or smell originate?"}
    F -->|"Loud Bang + Sweet/Fishy Smell from PSU"| G["Blown PSU Bulk Capacitor or Primary MOSFET: Retire PSU & Check Modular Cables"]
    F -->|"Hot Plastic Smell + Black Screen + 100% GPU Fans"| H["Inspect 12VHPWR / 12V-2x6 or 8-Pin GPU Power Plug for Melted Pins"]
    F -->|"Sharp Snap + Acrid Burnt Silicon Smell on Motherboard/GPU"| I["Shorted DrMOS VRM, MLCC Capacitor, or RGB/Fan Header: Inspect PCB Under Bright Light"]

Part 1: Decoding PC burning smells, sounds, and visual failure signatures¶

Before pulling parts out of your case, use the smell, sound, and symptom pattern from the moment of failure to pinpoint the culprit. For liquid-induced short circuits, see custom PC overheating and liquid cooler leak.

Diagnostic matrix: smell, sound, and component failure mode¶

Part 2: Melting 12VHPWR និង 12V-2x6 GPU power cables: inspection and triage¶

High-wattage graphics cards (drawing 300 to 600 watts under load) use the compact 16-pin PCI-SIG high-power connector: either the original PCIe 5.0 12VHPWR (H+ marker) or the revised CEM 5.1 12V-2x6 (H++ marker).

Why 16-pin GPU cables melt and why the screen goes black with fans at 100%¶

The 16-pin connector contains 12 main power pins (six +12V pins on the top row and six Ground pins on the bottom row) rated to carry up to 55 Amps (660 Watts) combined, plus 4 tiny sideband sense pins (SENSE0, SENSE1, CARD_PWR_STABLE, PWR_OK) underneath.

1. The 1.5-millimeter partial-seating trap: On the original 12VHPWR plug, if the stiff cable was pushed in to 90 percent depth (leaving a tiny 1 to 2 millimeter gap before the plastic latch clicked), the four sense pins could still make contact and tell the GPU it was allowed to draw the full 450W to 600W, while the main +12V pins only touched by their very tips (or angled sideways so two pins carried 90 percent of the current).
2. Joule heating (\(I^2R\)) thermal runaway: Contact resistance at a partially seated or crooked pin rises from a normal 1.5 milliohms to 20+ milliohms. At 20 amps of current on a single pin, \(I^2R\) heating generates 8 watts of concentrated heat inside a 2-millimeter metal sleeve, heating the pin past 200 degrees Celsius (392 degrees Fahrenheit), softening the Nylon-66 plastic housing, oxidizing the tin/gold plating (which raises resistance even further), and melting the plug.
3. Why GPU fans suddenly spin to 100% RPM when the screen goes black: When the melting plastic shifts the tiny SENSE0/SENSE1 pins or drops the +12V rail voltage below tolerance, the graphics card's onboard power controller shuts down the GPU core video output to protect the silicon, while the failsafe hardware PWM fan controller defaults to 100 percent emergency fan speed. If your PC screen suddenly goes black during a game while the GPU fans roar like a jet engine, shut down immediately and inspect your GPU power cable before rebooting.

Step-by-step forensic inspection of a suspected melting GPU connector¶

1. Take clear macro photos before touching the cable:
   • Use your smartphone flash to take close-up photos of the GPU power connector from the top, bottom (latch side), and both left/right profiles while it is still plugged into the graphics card in the case. Warranty adjusters for NVIDIA, AMD, board partners (ASUS, MSI, Gigabyte, etc.), and PSU/cable makers (Corsair, Seasonic, Be Quiet, CableMod) will ask to see whether the cable was seated flush.
2. Check the top row (+12V row) for plastic blistering or discoloration:
   • In 95 percent of 12VHPWR melting cases, the row of six +12V pins (the row farthest from the 4 tiny sense pins) melts first, especially the two outer corner pins where sideways cable-routing torque pulls the terminals slightly back. Look for shiny bubbled plastic, brownish discoloration on colored connectors, or a gap between the cable housing and the GPU header.
3. Attempt gentle removal ONLY if the plastic is not fused:
   • Press the retention latch firmly and pull straight back in line with the socket (never wiggle up-and-down or side-to-side).
   • If the connector refuses to budge: STOP IMMEDIATELY. Melted nylon inside the shroud has cooled and welded the male and female housings together into a solid block. Yanking it with pliers will rip the surface-mount header pads right off the graphics card PCB, turning a covered warranty repair into physical PCB destruction. Leave the cable attached (unplug the other end from the modular PSU) and ship the GPU with the fused cable still attached per the manufacturer's RMA instructions.
   • If the connector slides out: Shine a bright flashlight inside both the female cable plug and the male GPU header pins. Look for sunken or pushed-back metal sockets, blackened/bluish heat-tinted pins, or melted plastic crust inside the square pin cavities. Never reuse a cable or plug a fresh cable into a GPU header that has even a single darkened or crusted pin, because the insulating plastic melted onto the metal pin creates massive contact resistance that will instantly melt the new cable too.

How to prevent 12VHPWR និង 12V-2x6 cable melting on replacement¶

When installing a replacement graphics card or PSU cable, follow these mandatory mechanical rules:

• Use a native ATX 3.1 / PCIe 5.1 (12V-2x6) power supply cable rather than a 3x/4x 8-pin octopus adapter whenever possible: A single native 12V-2x6 cable from your PSU eliminates three intermediate adapter plugs and uses the updated H++ specification (where the 12 power pins are 0.25 millimeters longer and the 4 sense pins are recessed 1.5 millimeters deeper so the GPU cannot draw high power unless the plug is 100 percent seated).
• Pre-bend the cable at least 35 millimeters (1.4 inches) away from the connector BEFORE plugging it in: Never bend a 16-pin cable sharply upwards, downwards, or sideways right at the back of the plastic plug, as flexing the wires near the housing levers the internal crimp terminals crooked inside their cavities. Measure 35 millimeters (1.4 inches) of straight, unbent wire extending straight out of the plug before starting a gentle curve.
• Verify zero visible gap and an audible/tactile latch click: Plug the cable into the GPU outside the case (before installing the GPU into the motherboard PCIe slot) if your case is tight, press firmly on the back of the plastic connector housing (not the wires) until zero hairline gap remains between the plug collar and the GPU receptacle, and verify that your tempered-glass side panel does not press against the cable curve when closed.

Part 3: Power Supply Unit (PSU) capacitor blowouts and modular cable traps¶

When a Power Supply Unit fails with a loud bang, spark, or trip of your room's wall circuit breaker, your priority is isolating the dead PSU and verifying whether any downstream components were affected.

Why a blown PSU usually spares your motherboard and GPU¶

Modern ATX power supplies are divided into two electrically isolated halves separated by a high-frequency transformer and optocouplers:

1. The Primary (Hot / High-Voltage) Side: Takes 120V or 230V AC from your wall socket, rectifies it into -380V DC via the Active Power Factor Correction (APFC) boost circuit, and stores it in one or two large cylindrical 400V bulk electrolytic capacitors. When age, heat, or a voltage spike causes the APFC MOSFET or bulk capacitor to short out, it explodes with a dramatic flash and bang, immediately blowing the PSU's internal 10A/15A input fuse (and often tripping your home's 15A/20A room breaker). Because this explosion happens on the primary side of the isolation transformer, zero high voltage crosses over to your PC components.
2. The Secondary (Cold / Low-Voltage) Side: Generates the regulated +12V, +5V, and +3.3V DC rails monitored by a supervisor integrated circuit (OCP Over-Current, OVP Over-Voltage, UVP Under-Voltage, SCP Short-Circuit, and OTP Over-Temperature Protection). If any secondary rail rises more than 10 to 15 percent above nominal voltage, the OVP crowbar circuit shuts the PSU off in under 20 milliseconds.

The #1 deadly mistake during PSU replacement: reusing old modular cables¶

• What happens if you mix modular cables: Manufacturer A (or even Model Series X from the same brand) may wire Pin 3 on the PSU's modular SATA socket as +12V, while Manufacturer B wires Pin 3 as +5V or Ground. If you leave your old cables neatly zip-tied inside your case and simply swap the PSU box at the bottom, plugging the power button in will send raw +12 Volts straight into the +5 Volt logic chips of every SATA SSD, hard drive, AIO liquid cooler pump, and RGB controller in your PC, causing instantaneous smoke and destroying every drive in a single millisecond.
• Mandatory PSU swap rule: When removing a failed or upgraded modular PSU, strip 100 percent of its internal modular cables out of the PC case right along with the PSU box, and install only the new cables that came inside the box of your replacement PSU.

How to safely test whether your PC survived a PSU blowout¶

Once you have removed the failed PSU and all of its old modular cables, inspect and test the rest of your system in stages using a known-good replacement ATX 3.1 PSU:

1. ** ការត្រួតពិនិត្យមើលឃើញ និង olfactory នៃ motherboard និង GPU: **
   • ជាមួយនឹងការបិទបន្ទះចំហៀង និងពិលភ្លឺនៅក្នុងដៃ ពិនិត្យមើល ** តំបន់ VRM motherboard ** (នៅជុំវិញរន្ធស៊ីភីយូ នៅក្រោម ឬក្បែរឧបករណ៍ផ្ទុកកំដៅ) តំបន់ ** រន្ធដោត PCIe ** រន្ធ ** M.2 ** និង ** គម្លាតបន្ទះខាងក្រោយនៃកាតក្រាហ្វិក ** ។
   • បញ្ជាក់​ថា​គ្មាន​ចំណុច​ខ្មៅ​ដែល​ឆេះ​លើ PCB គ្មាន​ស្នាម​ប្រេះ ឬ​មាន​ពណ៌​ត្នោត​ទ្រុឌទ្រោម​រាង​ចតុកោណ​កែង​តូច (MLCCs) និង​គ្មាន​ខ្សែ​ដាន​រលាយ។ ចំណាំថា motherboard និង GPU heatsinks របស់អ្នកអាចនៅតែមានក្លិនតិចៗនៃផ្សែងបារីរបស់ PSU ដែលបានស្លាប់ក្នុងរយៈពេលពីរបីថ្ងៃ។ ស្រូបដោយផ្ទាល់ 2 សង់ទីម៉ែត្រ (1 អ៊ីញ) ពី motherboard VRMs ដើម្បីសម្គាល់ផ្សែងខ្យល់ដែលនៅជាប់នឹងបន្ទះឈីបដែលឆេះក្នុងមូលដ្ឋាន។
2. ** ផ្នែករឹងអប្បបរមា "Breadboard" ឬការធ្វើតេស្តដំណាក់កាលដែលបានបំបែក: **
   • មុនពេលភ្ជាប់ថាសរឹង SATA ដែលមានតម្លៃថ្លៃ ឬកាតក្រាហ្វិកស្មាតហ្វូនរបស់អ្នកទៅ PSU ថ្មី សូមភ្ជាប់ តែខ្សែ ATX motherboard 24-pin និងខ្សែថាមពលស៊ីភីយូ 8-pin EPS (ប្រសិនបើស៊ីភីយូរបស់អ្នកមានក្រាហ្វិករួមបញ្ចូលគ្នា សូមដក GPU ដាច់ដោយឡែកទាំងស្រុងសម្រាប់ការសាកល្បងដំបូង)។
   • ដោតចូលទៅក្នុងព្រីជញ្ជាំងដែលការពារដោយការកើនឡើង បើកកុងតាក់ PSU ហើយសង្កេតមើល LEDs រង់ចាំ motherboard ។ ប្រសិនបើ​ភ្លើង​រង់ចាំ​បំភ្លឺ​ជាធម្មតា​ដោយ​មិន​ចុច ឬ​មាន​ក្លិន​ក្តៅ សូម​ចុច​ប៊ូតុង​ថាមពល ហើយ​ផ្ទៀងផ្ទាត់​ថា​ប្រព័ន្ធ​បង្ហោះ​ទៅ BIOS។
   • បិទថាមពល ដកដោតចេញ ដំឡើងកាតក្រាហ្វិកជាមួយខ្សែ PSU ថ្មីស្រឡាងរបស់វា ដែលអាចបិទបាន 100 ភាគរយ ហើយសាកល្បង boot ទៅ Windows។

ផ្នែកទី 4: ការសម្អាតឧបករណ៍ពន្លត់អគ្គីភ័យ និងការច្រេះ PCB¶

ប្រសិនបើកំហុសអគ្គិសនីធ្ងន់ធ្ងរបង្ខំអ្នកឱ្យបញ្ចេញបំពង់ពន្លត់អគ្គីភ័យចូលទៅក្នុង ឬនៅជិតកុំព្យូទ័ររបស់អ្នក យុទ្ធសាស្ត្រសម្អាតរបស់អ្នកអាស្រ័យទាំងស្រុងលើភ្នាក់ងារគីមីនៅខាងក្នុងឧបករណ៍ពន្លត់។ សម្រាប់នីតិវិធីភ្លើងឆេះផ្ទះដ៏ទូលំទូលាយ សូមមើល ឆ្លង​ចរន្ត​អគ្គិសនី និង​ឆេះ​ផ្ទះ​.

ភ្នាក់ងារពន្លត់អគ្គីភ័យប៉ះពាល់ដល់គ្រឿងអេឡិចត្រូនិចកុំព្យូទ័រ¶

ការកំចាត់មេរោគជាជំហានៗ ប្រសិនបើម្សៅពន្លត់ ABC ពណ៌លឿងបុកកុំព្យូទ័ររបស់អ្នក។¶

ឧបករណ៍ពន្លត់អគ្គីភ័យពណ៌ក្រហមស្តង់ដារគ្រួសារមានម្សៅ **monoammonium phosphate ** ពណ៌លឿងស្លេក។ ខណៈពេលដែលវាជួយសង្រ្គោះផ្ទះរបស់អ្នកពីការឆេះ ការបន្សល់ទុកធូលីពណ៌លឿងដែលអង្គុយនៅលើកាតក្រាហ្វិក និង motherboard របស់អ្នករយៈពេលពីរថ្ងៃនឹង corrode ជាអចិន្ត្រៃយ៍រាល់សន្លាក់ solder៖

1. រក្សាបន្ទប់ឱ្យស្ងួត ហើយកុំជូតម្សៅ ABC ជាមួយក្រណាត់សើម៖ ការបន្ថែមទឹកទៅក្នុងម្សៅ monoammonium phosphate ប្រែក្លាយវាទៅជាម្សៅអាស៊ីតផូស្វ័រដែលច្រេះ។
2. ម៉ាស៊ីនបូមធូលីស្ងួត និងផ្លុំចេញក្រៅផ្ទះ៖ ពាក់ម៉ាសការពារធូលី N95 និងស្រោមដៃ nitrile យកកុំព្យូទ័រទៅខាងក្រៅ។ ដក GPU, RAM និង M.2 SSDs ។ ប្រើជក់លាបពណ៌ធម្មជាតិទន់ ឬជក់ ESD ប្រឆាំងនឹងឋិតិវន្ត ដើម្បីបន្ធូរម្សៅពណ៌លឿង ខណៈពេលដែលបឺតវាចូលទៅក្នុងបំពង់បូមធូលីហាងដែលមានចម្ងាយ 2 សង់ទីម៉ែត្រ (1 អ៊ីញ) ។
3. Submerge or flush bare PCBs with 99% Pure Isopropyl Alcohol (IPA): យក heatsinks និង fans ចេញពី graphics card និង motherboard ដាក់បន្ទះសៀគ្វីទទេនៅក្នុងថាសប្លាស្ទិករាក់ ហើយចាក់ 99% anhydrous isopropyl alcohol។ លាងជម្រះដោយទឹកស្អាតចុងក្រោយនៃ 99 ភាគរយ IPA ហើយដាក់ក្តារបញ្ឈរនៅពីមុខកង្ហារក្នុងបន្ទប់គ្រួសាររយៈពេល ** 48 ទៅ 72 ម៉ោង** មុនពេលផ្គុំឡើងវិញ។ ចូលនិវត្តន៍ និងបោះបង់អង្គភាពផ្គត់ផ្គង់ថាមពល (PSU) ទាំងស្រុង ព្រោះអ្នកមិនអាចបើក ឬសម្អាតម្សៅ ABC ដោយសុវត្ថិភាពចេញពីផ្នែកខាងក្នុង PSU វ៉ុលខ្ពស់បានទេ។

របៀបអនុវត្តការធ្វើតេស្ត PSU "Paperclip / Jumper Block" ដាច់ដោយឡែកដែលមានសុវត្ថិភាព (សម្រាប់តែ PSUs ដែលមិនជក់បារីប៉ុណ្ណោះ)¶

ប្រសិនបើកុំព្យូទ័ររបស់អ្នកមិនព្រមបើកដោយចុច "click" ស្ងាត់ និងគ្មានផ្សែង ក្លិន ឬស្នាមប្រេះដែលអាចមើលឃើញ អ្នកអាចពិនិត្យមើលថាតើខ្សែភ្លើង 5V របស់ការផ្គត់ផ្គង់ថាមពល និងការបញ្ជូនបន្តថាមពលមេនៅតែដំណើរការ ** លុះត្រាតែផ្តាច់ PSU ពីគ្រប់ផ្នែកខាងក្នុងកុំព្យូទ័ររបស់អ្នក **៖

1. កុំសាកល្បង PSU ដែលហុយ ហុយ ក្លិនស្អុយ ឆេះ ឬសើម៖ ប្រសិនបើ PSU បញ្ចេញផ្សែង ឬផ្ទុះខ្លាំង សូមរំលងការធ្វើតេស្តនេះ ហើយចូលនិវត្តន៍ភ្លាមៗ។
2. ផ្តាច់ខ្សែសមាសធាតុ 100 ភាគរយ៖ ដកខ្សែ motherboard 24-pin ខ្សែ CPU 8-pin ខ្សែ GPU និងខ្សែ SATA ទាំងអស់ចេញពីផ្នែកកុំព្យូទ័ររបស់អ្នក ដូច្នេះសូន្យ hardware ត្រូវបានភ្ជាប់ទៅនឹង PSU ក្រៅពីខ្សែមេ 24-pin របស់វាដែលអង្គុយនៅខាងក្រៅប្រអប់នៅលើតុឈើ។
3. ** ស្ពានលេខ ១៦ (PS_ON# / ខ្សែពណ៌បៃតង) ទៅ Pin 17 (COM / ដី / ខ្សែខ្មៅ): **
   • បង្វិលកុងតាក់រ៉ក PSU ខាងក្រោយទៅ ** បិទ (O)** ហើយ​ដក​ខ្សែភ្លើង AC ចេញ។
   • Use the plastic 24-pin PSU jumper test block included in the box of many modular PSUs (or bend a standard metal paperclip into a U-shape).
   • Holding the 24-pin motherboard connector with the plastic retention clip facing UP toward the ceiling and the open square pin holes facing you, count along the top row (Row 2, clip side) from left to right: Pin 16 is the 4^th pin from the left on the clip-side row, and Pin 17 is the 5^th pin from the left right next to it.
   • Insert the jumper block or paperclip into Pin 16 and Pin 17, set the connector down on a non-conductive surface without touching the metal clip, plug the AC cord in, and flip the rear PSU switch on (keep in mind that many modern "Zero-RPM" eco-mode PSUs will not spin their fan under zero load unless you turn "Eco / Zero-RPM Mode" off on the rear button).

បញ្ជីត្រួតពិនិត្យសុវត្ថិភាពអគ្គិសនី និងផ្នែករឹងរបស់កុំព្យូទ័រ¶

• Unplug AC wall power and all DisplayPort/HDMI monitor cables before touching internal components.
• Ventilate the room for 15 minutes if capacitor electrolyte or burnt fiberglass fumes are present.
• Photograph any melted 12VHPWR / 12V-2x6 GPU connector in place from all four sides before attempting removal.
• Never pull a fused GPU power connector with pliers; leave it attached and ship the card and cable together for warranty RMA.
• Remove 100% of old modular PSU cables from the case when swapping power supplies so unstandardized PSU-side pinouts never fry your drives.
• Maintain a 35-millimeter (1.4-inch) straight, unbent zone behind any 16-pin GPU power plug and verify zero visible seating gap.

សំណួរដែលគេសួរញឹកញាប់¶

Why did my PC make a loud gunshot bang and trip my room's circuit breaker, and are my GPU and SSDs ruined?¶

A loud gunshot or firecracker bang from the bottom/back of your PC accompanied by a tripped room breaker and a sweet or fishy chemical odor is the classic signature of a blown primary 400V bulk electrolytic capacitor or Active PFC MOSFET inside your Power Supply Unit (PSU). Because this failure occurs on the high-voltage AC input side of the PSU's internal isolation transformer, the PSU's internal fuse and your wall breaker cut the circuit before any surge crosses over to the low-voltage 12V/5V/3.3V DC side. In over 85 percent of cases, your motherboard, CPU, graphics card, and SSDs are completely unharmed as long as you unplug the failed PSU immediately and never try to turn it back on.

How can I tell the difference between the older 12VHPWR socket and the safer updated 12V-2x6 socket on a graphics card or PSU?¶

Look closely with a flashlight and magnifying glass at the tiny molded plastic lettering stamped onto the top or side of the 16-pin connector shroud. Original PCIe 5.0 12VHPWR connectors are stamped with the symbol "H+" (which has longer sense pins that allow high power draw even if the plug is slightly ajar). Updated CEM 5.1 12V-2x6 connectors are stamped with the symbol "H++" (which lengthens the 12 main power contact pins by 0.25 millimeters and recesses the 4 tiny sense pins by 1.5 millimeters, ensuring the GPU will refuse to power on or will limit wattage unless the connector is pushed 100 percent flush into the socket). Note that existing 12VHPWR cables are backward- and forward-compatible with 12V-2x6 headers as long as you seat them completely flush with zero gap.

Why did a single SATA power splitter cable catch fire inside my case when hard drives barely use any electricity?¶

Cheap third-party "Molex-to-SATA" or "1-to-4 SATA power splitter" cables sold online often use **injection-molded** SATA plugs rather than **crimped/assembled** plugs. Inside a cheap injection-molded SATA plug, the four internal 18AWG wires (+12V, Ground, +5V, Ground) are held only by soft PVC plastic poured over them at the factory; over time, heat and cable tension cause two adjacent wires inside the molded plastic block to touch slightly, creating a resistive bridge arc that heats to 300 degrees Celsius (572 degrees Fahrenheit) without drawing enough total amps to trip your PSU's 20-amp Over-Current Protection (OCP). Always discard molded Molex-to-SATA adapters and use only native crimped SATA cables supplied with your PSU.

Can I use a hair dryer or compressed air cans to clean out a PC after an electrical pop or smoke event?¶

Never use a household hair dryer on computer electronics, as hair dryers blow hot air mixed with thousands of volts of static electricity (ESD) that can zap delicate CMOS gates. You can use dry compressed air outdoors to blow loose dust or dry fire-extinguisher powder off unpowered components after unplugging the PC and removing the PSU, provided you hold the can upright so freezing liquid propellant does not spray onto the board, and hold fan blades still with a finger so spinning the fan motor backward does not generate back-EMF voltage into the motherboard fan header.

ប្រភពបានពិនិត្យ¶

• PCI-SIG (Peripheral Component Interconnect Special Interest Group, United States / International): PCI Express CEM 5.0 (12VHPWR) and CEM 5.1 (12V-2x6) High-Power Connector Electromechanical and Thermal Specifications.
• Intel Corporation (United States): ATX Version 3.0 and ATX Version 3.1 Multi-Rail Power Supply Design Guide (OCP, OVP, UVP, SCP, and Transient Excursion Standards).
• International Electrotechnical Commission (IEC) and Underwriters Laboratories (UL, International): UL/IEC 62368-1 Audio/Video, Information and Communication Technology Equipment Safety Requirements (Capacitor Discharge and Fire Enclosure Standards).
• National Fire Protection Association (NFPA, United States): NFPA 10 Standard for Portable Fire Extinguishers (Class C Energized Electrical Equipment Agents and Corrosive Dry Chemical Residue Mitigation).
• IPC (Association Connecting Electronics Industries, International): IPC-J-STD-001 and IPC-7711/7721 Rework, Modification, and Solvent Decontamination of Electronic Assemblies.

ការណែនាំដែលពាក់ព័ន្ធ¶

• ការឡើងកំដៅកុំព្យូទ័រផ្ទាល់ខ្លួន និងការលេចធ្លាយម៉ាស៊ីនត្រជាក់រាវ
• GPU artifacting and hardware crash recovery
• លេបផ្នែកហ្គេម និងថ្មកុងសូលហើម
• ឆ្លង​ចរន្ត​អគ្គិ​ស​នី និង​ឆាបឆេះ​ផ្ទះ​
• ការបរាជ័យនៃដ្រាយវ៍រឹង និងការសង្គ្រោះទិន្នន័យ
• លេខសង្គ្រោះបន្ទាន់