Here is some review tips:
Anything you write should have both an introduction and a conclusion.
Technical writing normally does not allow the use of pronouns (I, We, You, they) however most reviewers skip this, it is hard to be witty and follow this rule, but it is still doable.
A review consists of both empirical data and subjective observations.
Empirical is the benching that you do, can it handle this load and this ambient temp, in a case or on a test bench. Using dedicated hardware or software to monitor and chart the results. (Excel works really well for chart building)
Subjective means "your opinion." The difficulty level for installation, for instance is going to be different based on your experience level. A novice might find it difficult a pro might not. Use this in comparison with your own experience to create "subjective" points. Obviously these points will vary and why it is important to point out that they are your own opinions.
Appearance/aesthetics falls under opinion, and if you do not have a dedicated decibel meter than noise will as well. With no decibel meter comparing it to say fans you have laying around like yateloons, or deltas or what have you is a good way to convey sound level without a discrete measuring device. (most people do not understand decibels anyway)
Obviously no one person can cover everything at a high level, so try and focus on your strengths high level overclocker.. awesome use that to push the laod capabilities.. nothing really that can push the hardware tested? Focus on features and ease of use. etc
Outlines can help alot to keep your points in the right section. IE not talk about the mounting mechanism in say wPrime testing section lol.
Just some tips, feel free to ignore them