I have been testing the new version of Razer Blade 18 (2025) for review, and it lived up to its extravagant reputation by easily outperforming my standard benchmarks with enthusiasm. This isn’t surprising considering its top-tier specifications: an overclocked NVIDIA GeForce RTX 5090 GPU and the nearly maxed-out “Arrow Lake” Core Ultra 9 275HX processor from Intel, so it was destined for high scores.
In essence, Razer, a renowned brand for its premium offerings, typically has high price points that escalate even further. Yet, with an attractive discount, the customizable Blade 18 is now available at a starting cost of $2,999.99 on Razer’s official website, specifically for a 5070 Ti model.
My sample was quite large, and running the RTX 5090 with my collection of games felt like an easy task, given its reputation as one of the world’s most powerful gaming laptops. However, I didn’t delve too deeply into aspects such as thermals and noise levels in my previous analysis, which I aim to address today.
Of course, many are curious about how warm these high-end gaming laptops can get. It makes sense, considering they house components similar to their powerful desktop counterparts, such as an RTX 5090. However, it’s important to note that the laptop version of this GPU (175W) pales in comparison to its desktop counterpart (575W), which I tested in January. Despite this, the laptop RTX 5090 remains the top-tier GPU option, so one might wonder if the heat output increases due to its exceptional performance, don’t they?
The article is well-written, but it’s missing an essential piece of information – thermals. In order to make a comprehensive review, this detail should be included.
Belgarath, community member
As a researcher, I recently conducted a baseline test on the Razer Blade 18 (2025) using AC power through a 400W GaN charger with the ‘Balanced’ profile enabled in Razer Synapse. While streaming a YouTube video via Microsoft Edge, the CPU temperature sensor read approximately 57-62°C, suggesting a moderately warm internal chassis environment. The idle GPU hovered around a slightly cooler 52°C. Even when the system was sitting idle on an empty Windows 11 desktop, the CPU temperature remained close to 57°C, indicating minimal cooling effect.
In simple terms, when my ‘FLIR ONE Gen 3’ thermal camera is used during its nearly idle state, it registers a temperature of approximately 33.9°C on the lower chassis, with ergonomic wrist rests situated on either side of the large touchpad. The center of the keyboard slightly warms up to about 37.8°C, and the vent, which is mounted on the hinge, expels air that measures around 44.1°C.
Without requiring a thermal camera, it’s discernible when the vapor chamber is functioning. This happens because it channels cool air to tactile areas above the ‘Esc’ key and the upper part of the number pad that you can feel. These regions typically measure approximately 27.3°C, appearing as spots ranging from purple to black in most thermal imaging devices.
Powering on the RTX 5090 graphics card with a repeating ‘Steel Nomad’ stress test using 3DMark, maintaining the ‘Balanced’ setting in Synapse. This setup demonstrates that the GPU temperature reads approximately 72°C, while the Intel processor climbs to around 69°C, and the fans pick up speed closer to 2900 revolutions per minute (RPM). Such conditions are common for top-tier PC gaming experiences.
In simpler terms, when running the synthetic benchmark using the ‘Performance’ profile in Synapse, the CPU and GPU heat up significantly, causing the fans to spin at a loud 3300 RPM. However, instead of sticking with this setting, I decided to re-evaluate my gameplay performance in Cyberpunk 2077 at a high resolution (3840 x 2400) using DLSS 4 for a more real-world test. Previously, I had maximized NVIDIA’s ‘Transformer’ model to ‘Ultra Performance’ to squeeze out additional frames, but this time around, I will opt for the ‘Auto’ setting instead.
In the Razer Synapse software, you have the ability to manually crank up the fans to a speed of 4600 revolutions per minute (RPM). This operation reaches approximately 66.1 decibels (dBA), which is quite loud.
During gameplay, the on-screen benchmark reports an average frame rate of 149 FPS. The GPU temperature registers at approximately 74 degrees Celsius, while the CPU hovers around 84 degrees Celsius. The fans reach a maximum speed of about 3000 revolutions per minute (RPM). In terms of external temperatures, the wrist rest areas of the chassis record slightly higher temperatures, averaging 39.3 degrees Celsius, while the center of the keyboard rises to 43.3 degrees Celsius. The hinge emits hot air, reaching up to 59.7 degrees Celsius. This represents an overall temperature increase of nearly 9 degrees Celsius compared to its idle state.
The built-3-fan cooling system inside handles high temperatures effectively, but it does so with a noticeable sound level that I likened to a tornado, and I still maintain this comparison even after testing the Razer Blade 18 (2024) last year. At its maximum setting, the noise is almost unbearable and, consequently, contributed to the review score losing half a star. I would not subject my family to such constant whirring noise.
When the Blade 18 (2025) is idle or playing a muted YouTube video, its fans produce approximately 36.3 decibels (dBA) while spinning at 1600 revolutions per minute (RPM). As the speed increases to 3000 RPM, the noise level rises to 52.1 dBA. Running a 3DMark benchmark pushes the fans up to 3300 RPM, causing a slight increase in noise to 54.2 dBA. For amusement, I can manually adjust the fans to their maximum speed of 4600 RPM via Razer Synapse, which yields a noise level of around 66.1 dBA, much like a vacuum cleaner.
Indeed, the laptop is quite noisy, but that’s due to the powerful fans maintaining the internal temperatures at an acceptable level, especially considering its high-performance graphics. With top-tier gaming capabilities like the Razer Blade 18, heat production from the CPU and GPU is inevitable. The fan noise might be somewhat bothersome, but it serves a crucial purpose. For enhanced gaming sessions, it would be advisable to use a headset such as Razer’s improved BlackShark V3 Pro to mitigate the impact of the fan sounds. Nevertheless, these noises are there for a reason – they signify the laptop’s ability to handle demanding games effectively.
Mini LED or OLED in this day and age would be a minimum for such a high end price point
Jay Lynn, community member
I still have more to say about the Razer Blade 18, specifically regarding the display options. A reader brought up a valid concern that Razer omitted Mini LED or OLED this year, and I found that while the IPS panel reaches approximately 590 nits at maximum brightness, it doesn’t compare to the contrast of Mini LED. To better understand Razer’s decision to go with a dual-mode IPS display, possibly due to the high refresh rate of 400Hz planned for 2025, and whether this is a reasonable compromise, I plan on reaching out to Razer directly. Keep an eye out for further updates.
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2025-08-29 14:11