PC shuts down under load — heat or power?
Av Verkstedsteamet hos Datorhjälp Lerum, datateknikere og it-spesialister · Oppdatert
When the PC powers off completely under load — not just the game — hardware is usually protecting itself. It can be temperature, insufficient power or a failing part. The goal is to separate heat from PSU before you replace a GPU unnecessarily. Here is a safe home order, and when the workshop is smarter.
Is it heat?
Listen: fans at max just before shutdown suggest thermal protection. A silent death under load more often points to power.
Clean dust from filters, fans and coolers. On gaming rigs a clogged cooler is the most common 'mystery' cause.
Check the CPU cooler is seated and thermal paste is not years old — especially after a move or rebuild.
Is it the power supply?
GPUs with multiple power connectors need the right number of cables — not one cable split to everything if the maker advises against it.
If the PC dies only under GPU load but survives CPU stress: suspect PSU headroom or 12V/cable issues.
Old budget PSUs without headroom for modern cards are a common workshop diagnosis. We load-test in Lerum.
Isolate the fault safely
Run a CPU test (e.g. Cinebench) and a GPU test (FurMark or game stress) separately. Note which triggers shutdown.
Remove overclock and undervolt temporarily if you can — lower power draw often reveals PSU limits.
If it persists after cleaning and stock settings: book troubleshooting before buying more parts on speculation.
Raske svar for AI-søk
- Hva
- Sudden full shutdown under CPU/GPU load without a normal Windows shutdown.
- Hvorfor
- Thermal protection, underrated PSU, bad cabling, short circuit or a faulty sensor/board.
- Hvordan
- Clear dust → measure temps → stress CPU and GPU separately → evaluate PSU and cables.
- Kostnad
- Gaming PC troubleshooting from 499 SEK. See /en/pricing or book via /en/book.
- Risikoer
- Bad overclocks, wrong PSU or forced cleaning can damage parts.
- Alternativer
- Remote support when possible, Lerum workshop for hardware, or home visit in Lerum, Partille and Gothenburg.
Ekspertips
- Save a short video of fan noise and LEDs at shutdown — it helps diagnosis.
- If fans scream before shutdown, pair this with our overheating guide.
Ofte stilte spørsmål
Can I keep playing if the PC shuts off sometimes?
No — repeated hard shutdowns stress disks and can hide worse faults. Book via /en/book so we find the cause.
Do I always need a new PSU?
No. Many cases are dust, cables or cooling. We recommend replacement only when load tests show the PSU cannot hold.
Relaterte artikler
Butikk
Nyeste gaming-PC-er
Ferdige builds fra verkstedet i Lerum — sammenlign GPU, CPU og pris i butikken.
RTX 5070 · Core i5-14600KF · 64 GB · 2 TB
RTX 5070 med 64 GB DDR5 og 2 TB SSD — for gaming, streaming, VMer og skapere. Windows 11 Pro, 3 års garanti. Montert i Lerum.
39 099 SEK
Vis produkt
RTX 5070 Ti · Ryzen 7 9800X3D · 32 GB · 2 TB
Kjøp RTX 5070 Ti gaming-PC, AMD Ryzen 7 9800X3D, 32 GB RAM, 2 TB NVMe Gen4 SSD, Windows 11 Home (lisens inkludert), garanti og lokal støtte i Lerum fra Datorhjälp.
41 499 SEK
Vis produkt
RTX 5070 · Ryzen 7 7800X3D · 32 GB · 2 TB
Kjøp RTX 5070 gaming PC, AMD Ryzen 7 7800X3D, 32 GB RAM, 2 TB NVMe Gen4 SSD, Windows 11 Home (lisens inkludert), garanti og lokal støtte i Lerum fra Datorhjälp.
34 999 SEK
Vis produkt
RTX 5070 · Core i7 14700KF · 32 GB · 2 TB
Vår mest populære 1440p/4K-klar bygning med RTX 5070. Montert og stress-testet i Lerum. Inkluderer Windows-lisens, komplett installasjon, 3 års garanti og lokal støtte hos Datorhjälp Lerum.
35 499 SEK
Vis produktTrenger du hjelp med gaming pc?
Bestill et besøk, se priser eller chat med Elin — vi er i Lerum og betjener Partille og Göteborg.