The seven fan blades are aggressively positioned on the fan itself so it is a bit surprising that no fan grill was included to protect fingers, and errant bits of wire from being sucked in. As you might expect from any fan rotation at such a high RPM, it is not the quietest of heatsinks to deal with.

While the fan technically isn't a Delta is sure makes about the same level of noise. If you click on the headphones you can hear for yourself what I mean.

FrostyTech Acoustic Sampling Chamber (~10 sec)
Spectral view.
Standard Waveform view. (Listen to an MP3 recording of this heatsink by clicking on the headphones)

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	Thermal Integration	TI-V77L	26.5	39.1	44.4		57.5	63.6	grey	1	med	med
2	Vantec	CCK-6027D	27.4	45.4	49.6		64.9	73.4	none	1	med	med
3	OCZ	Dominator	26.5	37.7	50.9		52.4	74.2	none	1	loud	med
4	Akasa	Silver Mountain	26.6	46.2	51.5		65.0	76.1	none	1	loud	med
5	Vantec	CCK-6035D-Retail	26.5	44.2	52.8		63.2	77.9	none	1	loud	med
6	Thermaltake	Volcano 6cu+	26.5	40.3	55.3		58.6	84.4	carbon	1	loud	med
7	Spire	5T060B1H3R	26.7	42.7	57.5		64.6	85.1	none	1	low	med
8	Fortis	A92	26.7	45.6	65.8		67.8	97.8	none	1	loud	stiff
				50W	50W		100W	100W

One of the greatest misconceptions we tend to hear about is that copper on a heatsink automatically makes it a performance cooler. While the Volcano 6Cu+ is a not at the depths of OEM coolers, it is not quite what we would call a performance heatsink either. For its price it offers good performance characteristics, and would be worth considering for an average system.

But given the list of reference coolers and the performance of the TI-V77L, you have a broad range of options open to you to consider. Note the Volcano 6Cu+ does offer very good performance when used on the larger interface die at both test loads so it would seem to be an acceptable solution for socket 423 Pentium 4 chips.