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	Thermal Integration	TI-V77L	12.6	17.9		31.0	37.1
2	Thermal Integration	TI-S86-25	16.4	21.5		31.4	43.0
3	Vantec	CCK-6027D	18.0	22.2		37.5	46.0
4	OCZ	Dominator	11.2	24.4		25.9	47.7
5	Akasa	Silver Mountain	19.6	24.9		38.4	49.5
6	Vantec	CCK-6035D-Retail	17.7	26.3		36.7	51.4
7	Swiftech	MCX370-0A	19.7	23.8		38.0	53.3
8	Spire	5E055B1H3R	26.3	30.0		55.3	57.6
9	Thermaltake	Volcano 6cu+	13.8	28.8		32.1	57.9
10	Thermalright	CB-6L	25.7	33.1		49.2	68.1
11	Fortis	A92	18.9	39.1		41.1	71.1
			50W	50W		100W	100W

Notice how out of whack the results are for the large interface die are compared to the other reference coolers? The Spire Model 5E just can't handle the larger die at elevated temperatures, and appears to be overwhelmed.

 On the smaller interface die the results are at least in line with the coolers immediately adjacent to the Model 5E. Since the large core processors are not in the category recommended for this heatsink we can ignore those results completely, but it is interesting to see the degree of difference which can result because of an increase in interface size.

The Spire Model 5E showcases pretty average performance for a heatsink, largely due to its rather tiny 60mm fan. On the positive side, of the OEM class heatsinks that the Spire has found itself next to, it is one of the smallest, and quietest. Thus if you are looking for a decent OEM cooler with low noise signatures and having a height of only 40mm the Model 5E would be well worth considering. For performance applications it just doesn't have the necessary qualities.