Intel Sneaks out Cheap Pentiums
 

Intel is quietly offering a handful of low-end Pentium 4 processors to large PC makers.

Normally trumpeted as Intel Corp.'s flagship chip brand, chips such the new Pentium 4 516, which do not appear on the chip maker's public price list, are actually closer to its Celeron D value brand chips. Like the Celeron line, the low-end Pentiums lack features such as hyperthreading—which promises to bump up the performance of a computer—found in the mainstream Pentium 4 500 and Pentium 4 600 models.

http://www.pcmag.com/article2/0,1895,1864828,00.asp

This makes the old P4 Northwood HT an upgrade :)

what socket? enough cache?

S775 1MB

But, I find no increase in performance with increased cache size from Northwood to Prescott, perhaps the longer pipelines degrade the performance.