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Thermalright SI-120 CPU Cooler Review
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Thermalright SI-120 CPU Cooler

The Thermalright SI-120 is a well-designed and -constructed heatsink. Thermalright appeared to have improved upon the design of the XP-120 without compromising on performance.

When paired with a 120mm fan, the SI-120 was able to cool the CPU and its surrounding components better and with less noise than its smaller counterparts. In our temperature tests, we saw a significant reduction in CPU temperature, even when we compared it against the Thermalright XP-90 which is itself a very good heatsink.

This reduction in temperature also reflected in its overclockability. Our overclocking tests showed that using the SI-120 really improved the processor's overclockability, even over the XP-90.

Although the SI-120's base was not terribly well-finished, it obviously did not affect the heatsink's performance too much. Perhaps a bit of sandpaper and elbow grease would yield even better temperatures.

Thanks to the use of aluminium for most parts of the heatsink, the SI-120 is relatively light weight at just 400 g. So, you needn't worry about it warping your motherboard when you move it about.

Overall, the Thermalright SI-120 is a great heatsink that does what we expect from Thermalright heatsinks - excellent cooling performance with no major gripes or installation difficulties!

As such, we are happy to award the Thermalright SI-120 with our Reviewer's Choice Award! Congratulations, Thermalright!

For more details, read our Comprehensive Review!


• NA

Lowest PriceGrabber Price


Comprehensive Review


• SI-120

Heatsink Dimensions

• 135 mm long
• 125 mm wide
• 90 mm high

Heatsink Weight

• 400 g

Base Material

• Pure Copper

Fin Material

• Aluminium

Compatibility • AMD
  - Athlon64 FX 3200+ (socket 939/940)
  - Athlon64 3200+ (socket 754) and above

• Intel
  - Pentium-4 socket 478 3.2 GHz and above
  - Pentium-4 LGA775 2.8GHz and above

Package Contents

• Heatsink Assembly (SI-120)
• Thermalright Sticker
• Thermal Grease
• Retention Bracket
• Screws
• Wire Clips
• Strips of Rubber
• Instruction Manual


* Our New Review System

ARP is committed to developing new ways to improve your experience with us. As part of our continuous efforts to improve the value of our reviews to you, we are implementing a new review system.

This new review system is designed to allow you to quickly receive information on the latest hardware. This new system also allows you to quickly get the gist of the review without reading through it. This can be very useful, especially in situations where you need to make a quick purchase decision.

In this new system, we start with a Product Overview whenever a company sends us a press release about their latest product. We shift through extraneous PR-talk to create a straightforward summary of the product's features as well as specifications. This allows you to quickly find out all the pertinent details about the product, without reading through official press releases.

When we receive the product for review, we will quickly take photos of it and create a Pictorial Review. The purpose of a pictorial review is to allow you, the reader, to quickly examine the product visually. It may help you make better purchase decisions, especially if you cannot wait for the full review.

After thorough testing, we will post a Comprehensive Review of the product. This adds on to the pictorial review with comprehensive test results and our final conclusion on the product.

But no matter whether you are reading a Pictorial Review or a Comprehensive Review, you can always read the summary of the review as well as examine the product's specifications right on the first page. In all our new reviews, we will maintain the first page as a Product Overview page. If the product is listed in PriceGrabber, you can also check out the lowest price online.

We hope this new review system will make your experience a lot more enjoyable and informative!


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