Compare: AG400 BK vs Peerless Assassin 140

Design and Aesthetics:

AG400 BK

The AG400 series is a single tower 120mm CPU cooler that built upon DeepCool's legacy products but was stripped down for a streamlined and efficient package. It has a simple and clean design, with an aluminum tower and a single 120mm fan. This cooler comes in a variety of colors including black and white, so it matches most computer setups. Additionally, this cooler has RGB lighting which may fit for setups with a RGB focus.

Peerless Assassin 140

The Peerless Assassin 140 shares a similar design with other 140mm coolers from Thermalright, featuring two 140mm heatsinks paired with a 120mm fan at the front and a 140mm fan in the middle. The difference in fan sizes helps reduce RAM clearance issues, which are common with most 140mm air coolers. This model has a polished top and comes in an all-black design, though other color options may be available.

Install Notes:

AG400 BK

This cooler is moderately difficult to install and is more difficult than other DeepCool cooler installations. For AMD CPU's, the mounting setup can be given that the cooler doesn't secure through holes but rather through notches. For this reason, keeping the backplate flush against the motherboard while also keeping the install components in line may prove to be difficult and may require a second pair of hands. This also has a very similar installation to the AK400.

Peerless Assassin 140

The Peerless Assassin 140 CPU cooler features installation components similar to many mainstream Thermalright designs, making it relatively easy to install. However, it encounters a challenge when uninstalling, as it doesn't allow for sliding or twisting to break the thermal paste seal. This can be problematic if the thermal paste creates a strong bond between the cooler and the CPU.

Cooling Performance:

AG400 BK

It's designed to work with a wide range of modern CPU sockets and is able to dissipate heat quickly and efficiently. Although this cooler doesn't push out the best cooling performance, it does well for its size with performance slightly below the Noctua NH-U12S Redux. For this reason, this cooler is best for CPUs that need a moderate cooling solution.

Peerless Assassin 140

While the cooler offers similar peak performance to its competitors, its main advantage lies in its efficiency at lower RPMs, where it provides slightly better cooling. This translates to a noticeable edge in noise-to-performance ratio compared to smaller coolers, making it quieter under lower loads while still maintaining strong cooling capabilities.

Noise Performance:

AG400 BK

This cooler has an above average noise profile, making it louder than most comparable air coolers. This means that you might experience more noise while your PC is running, which could be a drawback if you're sensitive to noise or prefer a quiet workspace. If having a quiet PC setup is important to you, it's worth considering other coolers with better noise profiles.

Peerless Assassin 140

Due to its larger fans, this cooler becomes more audible at higher RPMs. However, because the fans move more air, lower RPMs are generally sufficient for cooling under most moderate CPU loads, allowing for quieter operation without sacrificing performance.

Summary:

AG400 BK

The AG400 is an excellent choice to upgrade their CPU cooling solution. It has a sleek design with ARGB capabilities, helping create that look that sets you apart. However, this cooler isn't the most powerful cooling solution so it may not be best for all CPU's and it runs on the louder side. Overall, there is enough that sets this cooler apart that makes this cooler worth considering.

Peerless Assassin 140

The Peerless Assassin 140 CPU cooler is easy to install, thanks to its design resembling other mainstream Thermalright models, but it presents a challenge during uninstallation as it doesn’t allow for sliding or twisting to break the thermal paste seal. It features two 140mm heatsinks, a 120mm fan at the front, and a 140mm fan in the middle, which helps reduce RAM clearance issues common with larger coolers. While its peak performance is on par with competitors, it excels at lower RPMs, offering better cooling and a superior noise-to-performance ratio compared to smaller coolers. Although more audible at higher RPMs due to its larger fans, the slower speeds still provide sufficient cooling for most moderate CPU loads, ensuring quieter operation without compromising performance.