The Arkua 6258 uses a small 60mm fan rotating at a high speed so it tends to produce a lot of noise. To hear just how much noise the 6258 produces simply click on the pair of headphones below and play the MP3.

Synthetic Temperature Test Results: *Ranked according to 100W small interface die test results.

FrostyTech Synthetic Temperature Test Platform Results
	Mfg.	Model	Ambient Temp.	27mm large copper block	15mm small copper block		27mm large copper block	15mm small copper block	Thermal pad	No. Fans	Fan Noise	Clip force
				50W	50W		100W	100W
1	Arkua	7228	23.1	37.3	39.4		52.0	57.2	none	1	loud	easy
2	Arkua	6258	22.6	38.4	41.8		55.0	61.9	blue	1	loud	med
3	Thermal Integration	TI-V77L	26.5	39.1	44.4		57.5	63.6	grey	1	med	med
4	Coolermaster	HCC-002	22.0	41.0	45.8		54.6	66.3	none	1	loud	easy
5	Vantec	CCK-6027D	27.4	45.4	49.6		64.9	73.4	none	1	med	med
6	OCZ	Dominator	26.5	37.7	50.9		52.4	74.2	none	1	loud	med
7	Akasa	Silver Mountain	26.6	46.2	51.5		65.0	76.1	none	1	loud	med
8	Vantec	CCK-6035D-Retail	26.5	44.2	52.8		63.2	77.9	none	1	loud	med
9	Thermaltake	Volcano 6cu+	26.5	40.3	55.3		58.6	84.4	carbon	1	loud	med
10	Spire	5T060B1H3R	26.7	42.7	57.5		64.6	85.1	none	1	low	med
				50W	50W		100W	100W

It seems as though the Aruka heatsinks like to travel in pairs, close to the top of our list of reference coolers. Remember that while the Arkua and Thermal Integration coolers look similar, they are different both fin-wise and fan-wise.