Jiushark JF13K-Diamond
If there’s anything missing in the relatively oversaturated range of CPU coolers, it’s a properly powerful top-flow model. The Chinese company Jiushark now brings one such cooler. Although it is not a completely original design (there already has been a similar cooler), it currently makes a rather unique impression. You will look in vain for an alternative with comparable TDP to the JF13K-Diamond cooler in its price range.
Width-oriented heatsink with two fans horizontally. Veterans will be sure to imagine Cooler Master’s Gemini dual-fan coolers. The new Jiushark JF13K-Diamond is also built on a similar basis. Considering the TDP of up to 265 W it is a very low-profile cooler. Due to its height of only 92 mm it is aimed at cases where comparable tower coolers, performance-wise (due to their height) or AIO liquid coolers (due to their greater than the limit width for selected SFF systems) won’t fit.
Jiushark goes at it fairly well in terms of memory compatibility as well. The base is centered and counts with memory module mounting on both sides, which is especially useful for high-end platforms that have DIMM slots on both sides of the CPU socket. However, there is some limitation on the height of the RAM heatsinks here, up to 50 mm, or 59 mm from the side with the higher seated finning.
The illustration pictures also show sufficient spacing from the first PCI Express slot, indicating extra space for access to the latch for demounting an expansion card. Even an SSD with a tall heatsink can fit between it and the heatsink, as the JF13K-Diamond shouldn’t restrict the SSD in the M.2 slot from above. This probably doesn’t 100% apply on absolutely all motherboards, but the mutual compatibility (of CPU and SSD coolers) is significantly better here than with performance-comparable tower coolers, which in the traditional, vertical position encroach more into the motherboard space in this axis. The JF13K-Diamond is 121mm deep and the Noctua NH-U14S cooler is as “much” as 150mm deep. The dominant dimension of the Jiushark top-flow cooler is 241 mm, stretching almost across the entire width of the ATX format boards.
Two 120 mm fans with their profile reduced to 15 mm are used to cool the heatsink. The speed range is 800–1800 rpm and the specified airflow range is 39.86–109.60 m3/hr.
The first tests have already appeared, where the JF13K-Diamond is supposed to hold a Core i9-11900K processor at 217 W “package power” reported via HWiNFo software monitoring under 85 °C. This in in benchtable conditions (i.e. outside a case, without system cooling) at an ambient air temperature of 22.3 °C in front of the test build. In similar conditions with higher CPU power draw (with CPU package power 251 W), the cores are already hitting 100 °C. But the Rocket Lake is a proper workhorse and even under high load with AVX-512 instructions, you know it doesn’t just reduce the multiplier/clock speeds and the operation can be evaluated as stable even under such alarming conditions. But it probably won’t be enough for 265W AMD Ryzen 7000 processors (typically after more aggressive overclocking of Ryzen 9s).
The price of this cooler is also interesting, on item.jd.com it’s on sale for 270 Chinese yuan, which is roughly 37 EUR and even after adding customs fees it could come out to an attractive price/cooling performance ratio. Alternative top-flow coolers with potentially similar TDP, such as the Noctua NH-C14S or Phanteks PH-TC14CS are significantly more expensive and also taller (i.e. with worse compatibility with small cases).
Supported platforms are AMD AM4/AM5 and Intel LGA 1700/1200/115x and the Jiushark JF13K-Diamond cooler is available in both black and all-white variants.
English translation and edit by Jozef Dudáš
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- Jiushark JF13K-Diamond
