Tom’s Hardware Verdict
Jiushark’s JF800 Diamond is the strongest performing air cooler we’ve ever tested, but it’s not easy to get in the U.S.
Strongest air cooler we’ve tested
Chart-topping noise-normalized performance
Nice aesthetics
You’ll probably have to import this one via AliExpress
Runs louder than competing coolers
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Features and Specifications
While Jiushark isn’t well known in U.S. enthusiast and PC building circles, we’vecovered the company in the past, highlighting some of its unique products like theJiushark M.2 Three, an M.2 SSD cooler that uses a dual heatpipe radiator and fan, much like a mini CPU cooler. We’ve also tested theJF13K Diamond low-profile CPU cooler.
Today, we’re looking at the new Jiushark JF800 Diamond dual-tower air cooler, available in white and black, with the company claiming cooling capabilities of up to 280W!
Will Jiushark’s latest makeour list of best CPU coolers on the market?There’s no question that it deserves a shot because, spoiler, this is the strongest performing dual-tower cooler we’ve ever tested, on both Intel Raptor Lake and Arrow Lake CPUs. But it’s also pretty hard to come by in the U.S., unless you’re willing to order it directly from China.
Let’s take a look at the specifications and features of the cooler. Then we’ll go over thermal performance and noise levels.
$43.40 via AliExpress
ARGB or non-ARGB fans
Unit Dimensions (including fans)
130 (L) x 135.5 (W) x 159mm (D)
254W with Core i7-14700K
Packing and included contents
Opening the compact box reveals the accessories, neatly packaged above the cooler.
Features of Jiushark’s JF800 Diamond
*️⃣ Six copper heatpipes
The Jiushark JF800 Diamond moves heat away from the CPU using six copper heatpipes – but as you’ll see in ourbenchmarks, it offers performance superior to similar air coolers we’ve tested.
*️⃣ Heatsink Design
The towers of the JF800 feature what appears to be a fairly basic fin design.
The tops of the heatsinks have a grille reminiscent of cattle guards, adding some nice aesthetics with the ARGB lighting shining through them.
*️⃣ Two 120mm fans with ARGB lighting
There’s more to a cooler than just the heatsink or radiator. The bundled fans significantly impact cooling and noise levels, as well as how the cooler looks in your case. The included fans here have nine blades, and there are models with or without ARGB lighting, according to your preference.
As you’ll see in the benchmarks below, the fans help enable superior thermal performance, but can be a little noisy.
120 x 120 x 25mm
800-1800 RPM ± 10%
Up to 83.54 CFM
Up to 2.68 mmH2O
System Fans
Iceberg Thermal IceGale Silent
There are many factors other than the CPU cooler that can influence your cooling performance, including the case you use and the fans installed in it. A system’s motherboard can also influence this, especially if itsuffers from bending, which results in poor cooler contact with the CPU.
To prevent bending from impacting our cooling results, we’ve installed Thermalright’sLGA 1700 contact frameinto our testing rig. If your motherboard is affected by bending, your thermal results will be worse than those shown below.
Not all motherboards are affected equally by this issue. I tested Raptor Lake CPUs on two motherboards. And while one showed significant thermal improvements after installing Thermalright’s LGA1700 contact frame, the other motherboard showed no temperature diffrence! Check outour review of the contact framefor more information.
I’ve also tested this cooler with Intel’s latest platform, Arrow Lake and the LGA 1851 socket.
System fans
Pre-installed case fans
LGA 1700 and 1851 installation
The installation of this air cooler is easy with the included mounting hardware.
You’ll first need to place the backplate against the rear of the motherboard after assembling it.
Next, you’ll need to take the rubber standoffs and slide them against the poles of the backplate.
Then, you’ll take the mounting bars and place them on top of the rubber standoffs, securing them with the included screws.
Apply the included thermal paste to your CPU. If you have any questions on how to do this properly, please refer to our handyhow to apply thermal pasteguide.
Remove the middle fan from the cooler, then place the cooler on top of your CPU. Use a screwdriver to secure it using the screws in between the two towers, shown below.
Once complete, connect the PWM and ARGB cables to the corresponding motherboard headers. Installation is now complete.
Current page:Features and Specifications
Albert Thomas is a contributor for Tom’s Hardware, primarily covering CPU cooling reviews.
