Every declared mode comes from the computer noise standards, and none of them is a game.
Lenovo declares idle, disk access and a processor load mode, "Operating (CPU)". MSI's procedure idles the laptop and then runs Prime95, a processor stress test, and FurMark, a graphics stress test, yet prints only one "Operation Mode" figure. For every Alienware, Dell declares idle and disk access only. ASUS prints a single figure and names no mode.
The Lenovo and MSI load figures come closest to a working number. Even they understate a long gaming session, because in a game the graphics card is the part working hardest.
For a machine that will rarely leave the desk, our desktop PC guide covers desktops declared under the same standards, where Dell and Lenovo also declare a processor load mode. Building that desktop yourself? Our guide to the quietest CPU coolers looks for the few makers that publish a figure at partial load, where a cooler actually runs.
Four makers, four conventions
None converts into another, so every ranking here stays inside one maker's figures.
Dell prints a mean sound power, LWA,m, in bels, with a statistical adder, KV, of 0.4 in a separate column. Lenovo prints an upper limit, LWA,c, with the adder already folded in, plus the sound pressure at the operator position. ASUS prints "the declared A-weighted sound power level" in dB under an old ECMA-109 method. MSI labels its figures "Bels / dB", and values like 44.6 only make sense as dB.
Meeting bels for the first time, or puzzled by Dell's separate adder column? Both are unpacked where we compare sound power with sound pressure.
How loud are Lenovo Legion and LOQ laptops under load?
From 23.3 to 34.5 dB at the operator position under CPU load, running from the Legion 7i Gen 10 at the bottom to the LOQ 15IRX10 at the top. Lenovo is alone in declaring both sound power and the sound pressure at your seat with the processor working, which makes its range the most useful of the four.
| Lenovo model | Sound pressure, CPU load | Sound power, CPU load |
|---|
| Legion 7i Gen 10 | 23.3 dB | 3.3 B |
| Legion Pro 5 Gen 10 AMD | 24.4 dB | "3" B |
| Legion 5i Gen 10 | 24.9 dB | 3.4 B |
| Legion Pro 7i Gen 10 (83F5) | 28.3 dB | 3.5 B |
| Legion 7a Gen 11 | 31.5 dB | 3.2 B |
| LOQ 15IRX10 | 34.5 dB | 4.1 B |
Sound power ranks them differently. The Legion Pro 5 Gen 10 AMD and the Legion 7a both declare less than the Legion 7i's 3.3 bels. The 7a is the clearest case: low total sound power, yet more of it reaches the operator position.
Two Legion Pro 5 machine types, two very different sheets
This is the biggest trap in Lenovo's paperwork.
The Legion Pro 5 16IAX10 declaration, for machine type 83F3, reads 3.1 bels and 25.0 dB under CPU load. The 16IAX10H declaration, for machine type 83LU, reads 5.9 bels and 48.1 dB, the highest load sound power we found from Lenovo. Same name on the box. The Legion Pro 7 splits the same way between its 83F5 and 83F4 declarations.
The machine type is the first four characters of Lenovo's part number. Match it to the declaration before you buy.
How loud are Alienware laptops?
From 2.2 to 3.3 bels mean at idle on Dell's datasheets. How loud one gets in a game is not published, because Dell declares no processor or graphics load mode.
Within what they cover, the Alienware sheets are consistent and complete. The 16 Aurora, 16X Aurora and 16 Area-51 all declare 2.2 bels mean at idle, and the 18 Area-51 declares 3.3. Sound pressure is what separates them: 14.5 dB for the 16 Aurora, 14.4 or 14.6 dB for the 16X Aurora depending on the regulatory type, 22.1 for the 16 Area-51 and 33.4 for the 18.
ASUS's single figures run from 24.1 dB for the Zephyrus G14 (2025) to 28.9 dB for the Core Ultra versions of the Strix G16 (2025), with no mode given. Its newest 2026 models, the Zephyrus G14 and G16 among them, use a newer sheet format with no noise line at all.
MSI's Stealth 16 AI declares Idle Mode 23.2 and Operation Mode 44.6, and the Vector 16 HX AI 27.5 and 48.8. Each document names its test configuration, and that is not always what MSI sells in the US: the Stealth was tested with a Core Ultra 9 285H, while the $1,749 US model has a Core Ultra 7. Several of the newest models, including the 2026 Stealth 16 AI+, had no declaration on MSI's ErP page when we checked.
HP OMEN, Razer Blade and Acer Predator publish nothing
We found no noise declaration for current HP OMEN and Victus laptops, Razer Blade laptops or Acer Predator Helios laptops. That does not make them loud. It makes them impossible to rank.
A cooling pad under the chassis adds fans too, and our cooling pad guide sorts fifteen US-sold pads by what each maker's figure actually claims. One owner on KLIM's Wind page says the pad runs quieter than the laptop's fans while gaming, but that is a review, not a measurement.
