The AVC-labled fan 15mm thick 70mm fan used on the 117140 is a bit noisy, but not extremely so. The fan is more powerful than other AVC heatsinks used, as it draws 0.4A when powered up.

At FrostyTech we always like to give you the option to judge for yourself, so we place each heatsink in to a special Frosty Acoustic Sampling Chamber and take a recording of it in operation. To hear this heatsink, simply click on the pair of headphones pictured below.

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

FrostyTech Synthetic Temperature Test Socket 478 Platform Results
	Mfg.	Model	Ambient Temp.	27mm large copper block		27mm large copper block	Thermal pad	No. Fans	Fan Noise	Clip force
				50W		100W
1	AVC	117140	22.6	37.8		50.4	none	1	med	med
2	Arkua	8568	22.4	37.8		51.7	none	1	med	med
3	Vantec	GSN-7025	22.5	41.7		58.5	none	1	med	med
4	Chauh Choung	DTA-478	22.4	42.1		59.0	carbon	1	low	med
5	Intel	Socket 478	22.4	41.8		59.8	carbon	1	low	med
6	Dynatron	DC1206BM-S	22.4	43.2		62.0	none	1	med	med
7	AVC	117160	22.4	42.7		62.2	white pad	1	med	med
8	Vantec	GSN-7015	22.4	47.5		69.0	none	1	loud	stiff
				50W		100W

There are really few heatsinks for the socket 478 Pentium 4 processor that cam be considered "performance" oriented. While basically anything which offers users better cooling than the socket Intel cooler is an increase in performance, we are really looking for large decreases in cooling temperature.

The AVC 117140, as you can see in the initial set of results, kills its extruded aluminum brother, the AVC 117160 (which does no use a copper core) and outperforms the stock Intel socket 478 heatsink. In fact, the numbers seem to indicate that the AVC 117140 is the best heatsink out of this set of reference coolers. Now that ain't too shabby.