All Xeon Models | Hardware Secrets

As we explained, the difference between Xeon MP and Xeon is the number of supported CPUs for SMP (symmetric multiprocessing): Xeon supports SMP up to two CPUs on the same motherboard and Xeon MP supports up to four CPUs per bus.

It is possible to build servers with more than four Xeon MP CPUs on the same motherboard. In this case the processors should be tied in groups of four – since they only support up to four processors per bus. For example, on a server with eight Xeon MP processors, the first four will be connected to the same bus and the other four will be connected to another bus. The connection between the busses should be done by the chipset.

The main technical features of Xeon MP are:

Socket 603.
L1 execution trace cache of 150 KB.
L1 data cache of 8 KB or 16 KB on the models with EM64T technology (64-bit technology).
Direct symmetric multiprocessing (SMP) up to four CPUs.
Hyper-Threading technology.

On the table below we listed all Xeon MP models released to date.

TDP stands for Thermal Design Power and indicates the CPU maximum thermal dissipation, i.e. the CPU cooler must be able to dissipate at least this amount of heat.

sSpec	Internal Clock	External Clock	Tech.	TDP	L2 Cache	L3 Cache	Max. Temp. (º C)	SSE3	Execute Disable	64-bit
SL84W	3.66 GHz	667 MHz	90 nm	110 W	1 MB	–	73	Yes	Yes	Yes
SL84UN	3.66 GHz	667 MHz	90 nm	110 W	1 MB	–	73	Yes	Yes	Yes
SL8EY	3.33 GHz	667 MHz	90 nm	129 W	1 MB	8 MB	73	Yes	Yes	Yes
SL84U	3.16 GHz	667 MHz	90 nm	110 W	1 MB	–	73	Yes	Yes	Yes
SL8UM	3.16 GHz	667 MHz	90 nm	110 W	1 MB	–	73	Yes	Yes	Yes
SL79V	3 GHz	400 MHz	130 nm	85 W	512 KB	4 MB	71	No	No	No
SL8EW	3 GHz	667 MHz	90 nm	129 W	1 MB	8 MB	73	Yes	Yes	Yes
SL8ED	2.83 GHz	667 MHz	90 nm	129 W	1 MB	4 MB	73	Yes	Yes	Yes
SL6YL	2.80 GHz	400 MHz	130 nm	72 W	512 KB	2 MB	69	No	No	No
SL79Z	2.70 GHz	400 MHz	130 nm	80 W	512 KB	2 MB	70	No	No	No
SL6Z2	2.50 GHz	400 MHz	130 nm	66 W	512 KB	1 MB	70	No	No	No
SL6Z7	2.50 GHz	400 MHz	130 nm	66 W	512 KB	1 MB	70	No	No	No
SL7A5	2.20 GHz	400 MHz	130 nm	65 W	512 KB	2 MB	65	No	No	No
SL6YJ	2 GHz	400 MHz	130 nm	57 W	512 KB	1 MB	69	No	No	No
SL6Z6	2 GHz	400 MHz	130 nm	57 W	512 KB	1 MB	69	No	No	No
SL6KD	2 GHz	400 MHz	130 nm	57 W	512 KB	2 MB	69	No	No	No
SL66Z	2 GHz	400 MHz	130 nm	57 W	512 KB	2 MB	69	No	No	No
SL6H2	1.90 GHz	400 MHz	130 nm	55 W	512 KB	1 MB	68	No	No	No
SL6KC	1.90 GHz	400 MHz	130 nm	55 W	512 KB	1 MB	68	No	No	No
SL5G8	1.60 GHz	400 MHz	180 nm	72 W	512 KB	1 MB	78	No	No	No
SL5S4	1.60 GHz	400 MHz	180 nm	72 W	512 KB	1 MB	78	No	No	No
SL6GZ	1.50 GHz	400 MHz	130 nm	48 W	512 KB	1 MB	67	No	No	No
SL6KB	1.50 GHz	400 MHz	130 nm	48 W	512 KB	1 MB	67	No	No	No
SL5RW	1.50 GHz	400 MHz	180 nm	68 W	256 KB	512 KB	76	No	No	No
SL5G2	1.50 GHz	400 MHz	180 nm	68 W	256 KB	512 KB	76	No	No	No
SL5FZ	1.40 GHz	400 MHz	180 nm	64 W	256 KB	512 KB	74	No	No	No
SL5RV	1.40 GHz	400 MHz	180 nm	64 W	256 KB	512 KB	74	No	No	No