Rise Above Ambient Temp. (c)
	Mfg.	Model	27mm large copper block	15mm small copper block		27mm large copper block	15mm small copper block
			50W	50W		100W	100W
1	Arkua	7228	14.2	16.3		28.9	34.8
2	Thermal Integration	TI-V77L	12.6	17.9		31.0	37.1
3	Arkua	6258	15.8	19.2		32.4	39.3
4	CoolerMaster	HCC-002	19.0	23.8		32.6	44.3
5	Vantec	CCK-6027D	18.0	22.2		37.5	46.0
6	OCZ	Dominator	11.2	24.4		25.9	47.7
7	Akasa	Silver Mountain	19.6	24.9		38.4	49.5
8	Vantec	CCK-6035D-Retail	17.7	26.3		36.7	51.4
9	Arkua	6158	21.0	28.5		45.0	56.1
9	Thermaltake	Volcano 6cu+	13.8	28.8		32.1	57.9
10	Spire	5T060B1H3R	16.0	30.8		37.9	58.4
			50W	50W		100W	100W

If you haven't noticed it, the Arkua 6158 falls sharply towards the rear of our list of reference coolers as a direct result of the fan. Since we know for a fact that the actual heatsink body is identical to the 6258, you can see what a large impact fan power can have on a heatsink. Now this isn't always the case with each and every heatsink, but the volume of air moving through a heatsink has always been significant factor in how it performs overall.

Given that we know for a fact the Arkua cooler can perform a heck of lot better in other configurations I would suggest avoiding this specific model and simply getting the 6258. The performance relative to that cooler is very poor, but over all it isn't tremendously horrible. There are plenty of OEM coolers out there which have done a lot worse with equally powerful 10mm thick fans.