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2021 PS5 CFI-1100 Runs Cooler at the SoC, but Warmer at VRAM and VRM

A 2021 comparison found the revised PS5 CFI-1100B01’s SoC/CPU ran cooler than the launch model, while its VRAM and VRM readings rose. Here’s how to interpret the mixed results.
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In HardwareBusters’ 2021 comparison, the revised PS5 CFI-1100B01 had an SoC/CPU reading about 11°C lower than the launch model—but its VRAM and VRM readings were higher. So the smaller heatsink did not make every measured part hotter, nor did the SoC result mean every component ran cooler. These are results from specific test units, not Sony’s temperature specifications or a guarantee for every console.

What the 2021 comparison measured

The figures below compare a launch PS5 with the revised CFI-1100B01. The temperature readings are historical test results; ambient conditions, workload, sensor placement and test setup can affect them. They should not be read as official Sony limits.

Comparison Launch PS5 Revised CFI-1100B01 Change in the reported comparison
Heatsink mass 1,639 g (Digital Foundry) 1,368 g (Digital Foundry) 271 g lighter, calculated from the reported masses
Heat pipes Six (Digital Foundry) Four (Digital Foundry) Two fewer
SoC/CPU temperature 51.15°C (HardwareBusters) 40.08°C (HardwareBusters) 11.07°C lower on the revised test unit
VRAM temperature 40.88°C (HardwareBusters) 48.20°C (HardwareBusters) 7.32°C higher on the revised test unit
VRM temperature 44.97°C (HardwareBusters) 46.32°C (HardwareBusters) 1.35°C higher on the revised test unit
Exhaust-air temperature 39.85°C (HotHardware and Tom’s Hardware) 42.11°C (HotHardware); 41.11°C (Tom’s Hardware expanded comparison) HotHardware reported a 2.26°C increase; Tom’s Hardware reported a 1.26°C increase in its expanded comparison
Gaming power draw Exact value not stated in the cited comparison summaries (Tom’s Hardware) Exact value not stated in the cited comparison summaries (Tom’s Hardware) Reported as broadly similar
Fan noise Exact level not stated in the cited comparison summary (Tom’s Hardware) About 1 dB louder (Tom’s Hardware) About 1 dB increase reported for the revised unit

The exhaust readings differ between reports: HotHardware gives 42.11°C for the revised unit, while Tom’s Hardware gives 41.11°C in an expanded comparison. They should not be combined as if they came from one identical test. The component readings tell a more specific story than exhaust temperature alone.

Why the smaller heatsink raised concern

Digital Foundry reported that the CFI-1100 heatsink is lighter, uses four heat pipes instead of six, and contains less copper. Its fan has more blades. Those are real design changes, but heatsink size and pipe count alone do not determine the temperature of every chip or the console’s overall cooling result.

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Materials matter, too: aluminium has roughly 60% of copper’s thermal conductivity. But the heat path, airflow, fan and power-control strategy also shape temperatures. A lighter heatsink can therefore look less capable on paper without proving that the SoC will run hotter in use.

Why cooler SoC and hotter exhaust can coexist

Exhaust temperature is the temperature of air leaving the console, not a direct measurement of the SoC. A hotter exhaust stream can indicate that more heat is being carried out of the system; it does not, by itself, establish that the processor is overheating. The HardwareBusters component readings are the evidence behind the claim that the revised test unit’s SoC/CPU ran cooler.

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Separate later testing discussed by TechSpot compared temperature increases over ambient rather than relying only on absolute readings. In that separate comparison, the revised model was broadly favorable, with an APU about 10–12°C cooler and lower comparative VRM and memory deltas. That result is not interchangeable with the initial HardwareBusters figures: the test method and comparison are different.

How PS5 cooling relates to clock speeds

In his Road to PS5 presentation, system architect Mark Cerny described Sony’s approach: “We supply a generous amount of electrical power and then increase the frequency of GPU and CPU until they reach the capabilities of the system’s cooling solution.” He also explained that the console uses workload activity to set frequencies for a deterministic, repeatable experience, rather than simply reading the die’s instantaneous temperature.

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That design context helps explain why a heatsink change cannot be judged from its mass alone. The cited comparison reports broadly similar gaming behavior and power draw, and does not establish a meaningful performance penalty for the CFI-1100. It does not, however, prove that every workload, unit or ambient condition will produce identical temperatures.

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What PS5 owners should take from the results

  • The specific CFI-1100B01 unit in HardwareBusters’ comparison had a substantially lower SoC/CPU reading than the launch unit.
  • In that same comparison, VRAM and VRM readings were higher, so “runs cooler” applies to the SoC/CPU result—not to every component.
  • The smaller, lighter heatsink and reduced heat-pipe count are not, by themselves, evidence of a cooling failure.
  • The available comparisons do not show a need for a cooling accessory to make the CFI-1100 safe. They also do not establish a universal temperature result for every regional model or individual console.

When identifying a console, check the full CFI model code on its label rather than relying only on “launch” or “new” PS5 shorthand. The detailed temperature result cited here is specifically for CFI-1100B01; do not assume every suffix or region was measured in the same test.

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