Sony made an unusual engineering choice with the PlayStation 5: instead of standard thermal paste between the APU and heatsink, they used liquid metal. It was a smart call for cooling performance. It also introduced a failure mode that nobody was talking about at launch — and that we now see regularly in our repair shop. This guide covers everything: why liquid metal works, how it fails, what the warning signs look like, and what a proper replacement actually involves.

TL;DR: The PS5 uses an indium-gallium liquid metal alloy that conducts heat at 73 W/m·K — far above regular thermal paste. Over 3 to 5 years it degrades through two mechanisms: oxidation (forming solid copper gallate that blocks heat transfer) and gravity migration that creates bare "dry spots" on the APU. Both require professional repair.

What Is PS5 Liquid Metal and Why Did Sony Use It?

Sony chose liquid metal because the PS5 APU can draw over 200W at peak load — and standard thermal paste simply can't move that much heat fast enough. The liquid metal used is an indium-gallium alloy with thermal conductivity of approximately 73 W/m·K, compared to 4–12 W/m·K for typical thermal paste (Thermal Grizzly, product specifications). That's roughly six to eighteen times more effective.

The alloy stays liquid at room temperature. It makes full metal-to-metal contact across the chip surface — no air gaps, no dried-out patches. At launch, this let Sony keep the fan quiet and the chassis thin. The catch is that liquid metals are chemically active. They react with the metals they touch, and they move under gravity. Both of those facts matter a great deal after a few years of use.

How Liquid Metal Degrades: Oxidation and Migration Explained

The PS5's liquid metal degrades through two distinct processes. Oxidation begins immediately — the gallium-indium alloy reacts with the copper heatsink, forming copper gallate (CuGa₂), a solid compound with significantly lower thermal conductivity than the original alloy (Scientific Reports, 2022). Over time this reaction layer thickens and acts as an insulating barrier between chip and cooler.

The second failure mode is migration, and it's less discussed. Liquid metal is a fluid — it responds to gravity. In our experience, consoles kept vertical for extended periods show a distinctive pattern: the alloy pools toward the bottom edge of the APU, leaving the top portion of the chip with thin or no coverage. We've found this so consistently in vertically-placed units that orientation is now one of the first questions we ask when a customer books a PS5 overheating job.

Heat cycling accelerates both processes. Every time the console warms up and cools down, the alloy expands and contracts slightly, working the oxidation layer and shifting the fluid distribution. A console used for two-hour daily sessions degrades faster than one used weekly — the thermal cycles add up.

The PS5's liquid metal thermal interface — an indium-gallium alloy conducting heat at 73 W/m·K — degrades through two mechanisms: chemical oxidation with the copper heatsink forming copper gallate (CuGa₂), a solid compound with reduced conductivity, and gravity-driven migration that leaves bare "dry spots" on the APU surface. Both mechanisms worsen over 3 to 5 years of normal use. (Scientific Reports, 2022)

Signs Your PS5 Liquid Metal Has Failed

Thermal failure from degraded liquid metal shows up in recognizable patterns. The PS5's thermal management is aggressive — it would rather shut down than let the APU hit dangerous temperatures. So the symptoms tend to be abrupt rather than gradual. If your console is doing any of the following, liquid metal degradation is a likely cause.

PS5 Symptom Likely Cause Recommended Action
Sudden shutdown during demanding games Dry spot or oxidation blocking heat transfer Professional liquid metal service
Fan runs at full speed within minutes of start APU temperature rising faster than normal Liquid metal inspection + possible replacement
Fan loud but exhaust air feels cool Heat not reaching heatsink — dry spot likely Urgent — liquid metal replacement needed
"Your PS5 is too hot" on-screen warning APU thermal limit reached; cooling compromised Do not continue using — book repair immediately
Crashes only in PS5-native titles, not PS4 PS5 games push the APU harder; thermal headroom gone Liquid metal service likely resolves this
Console fine horizontally, crashes vertically Gravity migration — liquid metal has pooled to one side Switch to horizontal; book service soon

Why DIY Liquid Metal Replacement Is High-Risk

Liquid metal is electrically conductive. That single fact makes it categorically different from standard thermal paste. One drop on an exposed area of the PS5 motherboard causes an immediate short circuit — and the damage is often irreversible. Gallium also corrodes aluminium on contact, which is a problem given how many aluminium components are near the APU.

The application itself requires precision tools, Kapton tape shields over all exposed circuitry near the APU, and a steady hand. Too much liquid metal and it migrates off the chip edge. Too little and you're back to dry spots. The confinement barrier — a small silicone dam Sony applies around the chip — must be checked and, if damaged, replaced. We've found that confinement barrier failures account for a meaningful portion of the liquid metal leakage cases we see, and spotting a damaged barrier requires knowing exactly what to look for.

We're not saying it's impossible. Some experienced technicians do this at home. But the failure rate among first-timers is high, and the consequences — a shorted motherboard — cost far more to fix than a professional service would have.

What Professional Liquid Metal Replacement Involves

A proper liquid metal service is not a quick job. The PS5 requires significant disassembly to reach the APU — you're removing the outer shell, the fan, the heatsink, and working down to the board level. Each step has its own risk if done carelessly.

From what we've seen doing these in Helsinki, the state of the liquid metal when we get there varies a lot. Some consoles — particularly those used horizontally and kept in well-ventilated spaces — still have workable alloy with only mild oxidation after three years. Others, especially vertically-placed units in warm entertainment units, show heavy CuGa₂ buildup and significant pooling after just two years of daily use. That variation is worth knowing when you're deciding how urgent the repair is.

The process itself follows these steps:

  1. Full disassembly: Shell, fan assembly, and heatsink removed to expose the APU surface.
  2. Oxidized material removed: The CuGa₂ layer is carefully cleaned from both the APU lid and the copper heatsink contact plate using appropriate tools — not cotton swabs, which leave fibres.
  3. Surface cleaned: Both surfaces wiped with high-purity isopropyl alcohol (99%+) until completely clean and dry.
  4. Confinement barrier inspected: The silicone dam around the chip is checked for cracks or gaps. Replaced if compromised.
  5. Kapton tape shields applied: All exposed circuitry adjacent to the APU is shielded before new liquid metal is applied.
  6. Fresh liquid metal applied: Correct volume spread evenly across the APU surface, within the confinement barrier.
  7. Reassembly and function test: Console reassembled and tested under load to verify temperatures return to normal operating range.

How Often Does PS5 Liquid Metal Need Replacing?

Under typical home use, PS5 liquid metal performs well for 3 to 5 years before degradation becomes significant enough to affect thermal performance noticeably. That's the general interval we'd suggest for a preventive service — before symptoms appear, not after. If your console is already overheating, don't wait for a scheduled service; book it now.

Several factors shorten that interval: vertical placement, long daily sessions, a warm room or enclosed TV cabinet, and dusty environments that force the fan to work harder. Conversely, horizontal placement, good ventilation, and regular external dust cleaning can push that interval toward the longer end.

There's no firmware indicator that tells you liquid metal health. The only way to know is to open the console. An overheating console that's been cleaned externally and still runs hot is almost always a liquid metal issue by year three or four.

FAQ

Can I replace PS5 liquid metal myself at home?

Technically yes, but the risk is very high. Liquid metal is electrically conductive — a single drop on the motherboard causes an immediate short circuit. You also need Kapton tape shields, isopropyl alcohol above 99% purity, and the right application tools. Most DIY attempts we've seen result in more damage, not less. Professional service is worth it.

How long does PS5 liquid metal last?

Under normal use, PS5 liquid metal typically lasts 3 to 5 years before oxidation and migration reduce thermal performance noticeably. Consoles kept vertical, or used daily for long sessions, tend to degrade faster. Horizontal placement slows gravity-driven migration considerably and can extend the interval.

What is a "dry spot" on the PS5 APU?

A dry spot is an area on the processor's lid where liquid metal has migrated away or oxidized into a solid compound, leaving no thermal contact with the heatsink. That patch of the chip has no path to shed heat. Temperatures spike within minutes of load, triggering emergency shutdown to prevent permanent silicon damage.

Is PS5 liquid metal the same as regular thermal paste?

No — they're fundamentally different. Standard thermal paste conducts heat at roughly 4 to 12 W/m·K. The indium-gallium alloy Sony uses conducts at around 73 W/m·K — six to eighteen times more effective (Thermal Grizzly). The trade-off is chemical reactivity with metal surfaces and electrical conductivity.

Why does vertical placement make liquid metal issues worse?

Gravity acts on liquid metal continuously. In vertical placement, the alloy slowly pulls downward across the APU surface over months and years. This leaves the upper portion of the chip with progressively less coverage. Horizontal placement keeps the alloy more evenly distributed, which is why we recommend it after every liquid metal service.

What does professional PS5 liquid metal replacement cost in Helsinki?

Pricing varies by console revision and the condition of the existing thermal interface. The service includes full disassembly, oxidized material removal, surface cleaning, fresh liquid metal application, confinement barrier check, and a post-repair function test. Contact us for a current quote — we serve Helsinki, Espoo, and Vantaa.

Is your PS5 overheating or shutting down?

A degraded liquid metal layer won't fix itself — and running a console hot accelerates APU wear. Get it checked before a cooling problem becomes a board-level repair.

Book PS5 Liquid Metal Service