DEC Alpha
Model history
ISA extensions R – Hardware support for rounding to infinity and negative infinity. B – BWX, the "Byte/Word Extension", adding instructions to allow 8- and 16-bit operations from memory and I/O M – MVI, "multimedia" instructions F – FIX, instructions to move data between integer and floating point registers and for square root C – CIX, instructions for counting and finding bits T – support for prefetch with modify intent to improve the performance of the first attempt to acquire a lock

DEC Alpha

Section Title: Model history
Table Section Text: ISA extensions R – Hardware support for rounding to infinity and negative infinity. B – BWX, the "Byte/Word Extension", adding instructions to allow 8- and 16-bit operations from memory and I/O M – MVI, "multimedia" instructions F – FIX, instructions to move data between integer and floating point registers and for square root C – CIX, instructions for counting and finding bits T – support for prefetch with modify intent to improve the performance of the first attempt to acquire a lock

Model	Model number	Year	Frequency [MHz]	Process [µm]	Transistors [millions]	Die size [mm2]	IO Pins	Power [W]	Voltage	Dcache [KB]	Icache [KB]	Scache	Bcache	ISA

EV4	21064	1992	100–200	0.75	1.68	234	290	30	3.3	8	8	–	128 KB–16 MB

EV4S	21064	1993	100–200	0.675	1.68	186	290	27	3.3	8	8	–	128 KB–16 MB

EV45	21064A	1994	200–300	0.5	2.85	164	33	3.3	16	16	–	256 KB–16 MB

LCA4	21066	1993	100–166	0.675	1.75	209	21	3.3	8	8	–

LCA4	21068	1994	66	0.675	1.75	209	9	3.3	8	8	–

LCA45	21066A	1994	100–266	0.5	1.8	161	23	3.3	8	8	–

LCA45	21068A	1994	100	0.5	1.8	161	3.3	8	8	–

EV5	21164	1995	266–500	0.5	9.3	299	296	56	3.3/2.5	8	8	96 KB	Up to 64 MB	R

EV56	21164A	1996	366–666	0.35	9.66	209	31–55	3.3/2.5	8	8	96 KB	Up to 64 MB	R,B

PCA56	21164PC	1997	400–533	0.35	3.5	141	264	26–35	3.3/2.5	8	16	–	512 KB–4 MB	R,B,M

PCA57	21164PC	600–666	0.28	5.7	101	283	18–23	2.5/2.0	16	32	–	512 KB–4 MB	R,B,M

EV6	21264	1998	450–600	0.35	15.2	314	389	73	2.0	64	64	–	2–8 MB	R,B,M,F

EV67	21264A	1999	600–750	0.25	15.2	210	389	2.0	64	64	–	2–8 MB	R,B,M,F,C

EV68AL	21264B	2001	800–833	0.18	15.2	125	1.7	64	64	–	2–8 MB	R,B,M,F,C,T

EV68CB	21264C	2001	1000–1250	0.18	15.2	125	65–75	1.65	64	64	–	2–8 MB	R,B,M,F,C,T

EV68CX	21264D	1.65	64	64	–	2–8 MB	R,B,M,F,C,T

EV7	21364	2003	1000–1150	0.18	130	397	125	1.5	64	64	1.75 MB	–	R,B,M,F,C,T

EV7z	21364	2004	1300	0.18	130	397	125	1.5	64	64	1.75 MB	–	R,B,M,F,C,T

Cancelled

EV78/EV79	21364A	Slated for 2004	1700	0.13	152	300	120	1.2	64	64	1.75 MB	–	R,B,M,F,C,T

EV8	21464	Slated for 2003	1200–2000	0.125	250	420	1800	??	1.2	64	64	3 MB	–	R,B,M,F,C,T

Model	Model number	Year	Frequency [MHz]	Process [µm]	Transistors [millions]	Die size [mm²]	IO Pins	Power [W]	Voltage	Dcache [KB]	Icache [KB]	Scache	Bcache	ISA

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