Curt Sampson <cjs@cynic.net> wrote;

>> Why is the Alpha so much slower that the P-75?
>
> It's a 21066, not a 21064. The 21066 is very, very slow when
> accessing the memory and second level cache, and this cripples its
> performance. 

According to Dr. Bhandarkar book "Alpha -- Implementations and
Architecture" a table on page 119,

				21064 		21066
				--------	----------
		[ two have the same frabrication technoglogy ]

Freq.				200MHz		166MHz
SPECint92			138		76	
SPECfp92			200		87
Linpack 100x100 Mflops		43		15
Linpack 1000x1000 Mflops	156		55
Livermore Loops Mflops		28		17

The auther tells the addtional cost of external PCI chipset (21070)
could be justified by performance gain, which means there is little
win of 21066.  The chip was defeated by Pentium.

Tohru Nishimura