The XP-S964, as the name may tell, is a cooler that features a 92 mm fan. It's smaller in every direction than the S1283 and instead of three heatpipes seen on the larger model, the XP has four smaller ones. The fins are spaced pretty closely and this time around there's a fan shroud that goes around them. I don't see any reason why the smaller fan couldn't be installed using similar rubber pins that came with the S1283, so I guess the shroud has to do with directing the airflow through the heatsink and also enhancing the outlooks of the cooler.
- Dimensions: 104 x 52 x 133 mm (W x D x H)
- Material: Copper base + Aluminum fins
- Heatpipes: 4 x 6 mm
- Weight: 550 g (with fan)
- Thermal Resistance: 0,18 °C/W
The bundle is almost identical to that which came with the HDT-S1283. The only differences are that this time there is no plate to direct the airflow to the motherboard and the soft fan mounting "screws" are already installed to the heatsink. Also the XP-S964 is mounted using the plastic pins similar to those in the Intel's reference cooler design.
The fan is also made by Xigmatek, and as already earlier said, it's a 92 mm model. The more accurate specifications are:
- Dimensions: 92 x 92 x 25 (W x H x D)
- Speed: 1200 - 2800 R.P.M.
- Bearing type: Rifle bearing
- Air flow: 39 - 54,6 CFM
- Noise level: 24-34 dBA
It's worth noticing that the rated speed and noise of the smaller fan are much greater than the ones specified for the 120 mm fan. Smaller fans always have to run faster to produce similar airflow, but this time the maximum RPM is almost twice the 1500 RPM of the 120 mm fan. Also the specified noise level is 7 dB higher, which is a huge difference. We'll see later on how quiet these fans are in real life enviroment, but the specifications really caught my eye.
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