The Intel® Server Board SE7520AF2 is designed to support one or two Intel® Xeon® processors with 1-MB or 2-MB L2 Cache with frequencies starting at 2.8 GHz using 90 nanometer technology and utilizing an 800 MHz front side bus. Previous generations of the Intel® Xeon® processor are not supported for use on Intel® Server Board SE7520AF2. When two processors are installed, both must be of identical revision, core voltage, cache size, and bus/core speed. When only one processor is installed, it should be populated into the socket labeled CPU_1 with the other CPU socket remaining unpopulated.
Starting with board revisions -703 or later, the Intel® Server Board SE7520AF2 will support the Intel® Xeon® Processor 2.80 GHz. 
If you are using an Intel® Server Chassis SC5300, please ensure that the passive heatsink is utilized.
Intel® Xeon® Processors:
| sSpec# | CPU Speed | Bus Speed | Mfg- Tech  | 			Stepping | Cache Size  | 			Package Type  | 			Notes | 
| 			 2.80 GHz  | 						 800 MHz  | 						 90 nm  | 						 N0  | 						 2 MB  | 						 604-pin micro-PGA  | 						 1,3,4,5,6,7,10  | 		|
| 			 2.80 GHz  | 						 800 MHz  | 						 90 nm  | 						 D0  | 						 1 MB  | 						 604-pin micro-PGA  | 						 10  | 		|
| 			 2.80 GHz  | 						 800 MHz  | 						 90 nm  | 						 D0  | 						 1 MB  | 						 604-pin micro-PGA  | 						 3,10  | 		|
| 			 2.80 GHz  | 						 800 MHz  | 						 90 nm  | 						 E0  | 						 1 MB  | 						 604-pin micro-PGA  | 						 1,2,5,10  | 		|
| 			 2.80 GHz  | 						 800 MHz  | 						 90 nm  | 						 E0  | 						 1 MB  | 						 604-pin micro-PGA  | 						 1,2,3,5,10  | 		|
| 			 3.00 GHz  | 						 800 MHz  | 						 90 nm  | 						 N0  | 						 2 MB  | 						 604-pin micro-PGA  | 						 1,3,4,5,6,7,10  | 		|
| 			 3.00 GHz  | 						 800 MHz  | 						 90 nm  | 						 N0  | 						 2 MB  | 						 604-pin micro-PGA  | 						 1,4,5,6,7,10  | 		|
| 			 3.00 GHz  | 						 800 MHz  | 						 90 nm  | 						 D0  | 						 1 MB  | 						 604-pin micro-PGA  | 						 10  | 		|
| 			 3.00 GHz  | 						 800 MHz  | 						 90 nm  | 						 D0  | 						 1 MB  | 						 604-pin micro-PGA  | 						 3,10  | 		|
| 			 3.00 GHz  | 						 800 MHz  | 						 90 nm  | 						 E0  | 						 1 MB  | 						 604-pin micro-PGA  | 						 1,2,5,10  | 		|
| 			 3.00 GHz  | 						 800 MHz  | 						 90 nm  | 						 E0  | 						 1 MB  | 						 604-pin micro-PGA  | 						 1,2,3,5,10  | 		|
| 			 3.20 GHz  | 						 800 MHz  | 						 90 nm  | 						 N0  | 						 2 MB  | 						 604-pin micro-PGA  | 						 1,3,4,5,6,7,10  | 		|
| 			 3.20 GHz  | 						 800 MHz  | 						 90 nm  | 						 N0  | 						 2 MB  | 						 604-pin micro-PGA  | 						 1,3,4,5,6,7,10  | 		|
| 			 3.20 GHz  | 						 800 MHz  | 						 90 nm  | 						 D0  | 						 1 MB  | 						 604-pin micro-PGA  | 						 10  | 		|
| 			 3.20 GHz  | 						 800 MHz  | 						 90 nm  | 						 D0  | 						 1 MB  | 						 604-pin micro-PGA  | 						 3,10  | 		|
| 			 3.20 GHz  | 						 800 MHz  | 						 90 nm  | 						 E0  | 						 1 MB  | 						 604-pin micro-PGA  | 						 1,2,5,10  | 		|
| 			 3.20 GHz  | 						 800 MHz  | 						 90 nm  | 						 E0  | 						 1 MB  | 						 604-pin micro-PGA  | 						 1,2,3,5,10  | 		|
| 			 3.40 GHz  | 						 800 MHz  | 						 90 nm  | 						 N0  | 						 2 MB  | 						 604-pin micro-PGA  | 						 1,3,4,5,6,7,10  | 		|
| 			 3.40 GHz  | 						 800 MHz  | 						 90 nm  | 						 N0  | 						 2 MB  | 						 604-pin micro-PGA  | 						 1,4,5,6,7,10  | 		|
| 			 3.40 GHz  | 						 800 MHz  | 						 90 nm  | 						 D0  | 						 1 MB  | 						 604-pin micro-PGA  | 						 4,10  | 		|
| 			 3.40 GHz  | 						 800 MHz  | 						 90 nm  | 						 D0  | 						 1 MB  | 						 604-pin micro-PGA  | 						 3,4,10  | 		|
| 			 3.40 GHz  | 						 800 MHz  | 						 90 nm  | 						 E0  | 						 1 MB  | 						 604-pin micro-PGA  | 						 1,2,4,5,10  | 		|
| 			 3.40 GHz  | 						 800 MHz  | 						 90 nm  | 						 E0  | 						 1 MB  | 						 604-pin micro-PGA  | 						 1,2,3,4,5,10  | 		|
| 			 3.60 GHz  | 						 800 MHz  | 						 90 nm  | 						 N0  | 						 2 MB  | 						 604-pin micro-PGA  | 						 1,3,4,5,6,7,10  | 		|
| 			 3.60 GHz  | 						 800 MHz  | 						 90 nm  | 						 N0  | 						 2 MB  | 						 604-pin micro-PGA  | 						 1,4,5,6,7,10  | 		|
| 			 3.60 GHz  | 						 800 MHz  | 						 90 nm  | 						 D0  | 						 1 MB  | 						 604-pin micro-PGA  | 						 4,10  | 		|
| 			 3.60 GHz  | 						 800 MHz  | 						 90 nm  | 						 D0  | 						 1 MB  | 						 604-pin micro-PGA  | 						 3,4,10  | 		|
| 			 3.60 GHz  | 						 800 MHz  | 						 90 nm  | 						 E0  | 						 1 MB  | 						 604-pin micro-PGA  | 						 1,2,4,5,10  | 		|
| 			 3.60 GHz  | 						 800 MHz  | 						 90 nm  | 						 E0  | 						 1 MB  | 						 604-pin micro-PGA  | 						 1,2,3,4,5,10  | 		|
| 			 2.80 GHz  | 						 800 MHz  | 						 90 nm  | 						 E0  | 						 1 MB  | 						 604-pin micro-PGA  | 						 2,5,6,10  | 		|
| 			 2.80 GHz  | 						 800 MHz  | 						 90 nm  | 						 R0  | 						 2 MB  | 						 604-pin micro-PGA  | 						 1,5,8,9,10,14  | 		|
| 			 2.80 GHz  | 						 800 MHz  | 						 90 nm  | 						 R0  | 						 2 MB  | 						 604-pin micro-PGA  | 						 1,5,8,9,10,14  | 		|
| 			 2.80 GHz  | 						 800 MHz  | 						 90 nm  | 						 R0  | 						 2 MB  | 						 604-pin micro-PGA  | 						 1,5,8,9,10,14  | 		|
| 			 3.00 GHz  | 						 800 MHz  | 						 90 nm  | 						 R0  | 						 2 MB  | 						 604-pin micro-PGA  | 						 1,5,8,9,10,12,14  | 		|
| 			 3.00 GHz  | 						 800 MHz  | 						 90 nm  | 						 R0  | 						 2 MB  | 						 604-pin micro-PGA  | 						 1,5,9,10,14  | 		|
| 			 3.20 GHz  | 						 800 MHz  | 						 90 nm  | 						 R0  | 						 2 MB  | 						 604-pin micro-PGA  | 						 1,5,9,10,13,14  | 		|
| 			 3.20 GHz  | 						 800 MHz  | 						 90 nm  | 						 R0  | 						 2 MB  | 						 604-pin micro-PGA  | 						 1,5,9,10,14  | 		|
| 			 3.40 GHz  | 						 800 MHz  | 						 90 nm  | 						 R0  | 						 2 MB  | 						 604-pin micro-PGA  | 						 1,45,9,10,14  | 		|
| 			 3.60 GHz  | 						 800 MHz  | 						 90 nm  | 						 R0  | 						 2 MB  | 						 604-pin micro-PGA  | 						 1,2,4,5,9,10,14  | 		|
| 			 3.80 GHz  | 						 800 MHz  | 						 90 nm  | 						 R0  | 						 2 MB  | 						 604-pin micro-PGA  | 						 1,2,4,5,8,9,10,14  | 		|
| 			 3.80 GHz  | 						 800 MHz  | 						 90 nm  | 						 R0  | 						 2 MB  | 						 604-pin micro-PGA  | 			1,2,4,5,8,9,10,14 | |
| SL8MA | 			 2.80 GHz  | 						 800 MHz  | 						 90 nm  | 						 A0  | 						 2MB x 2  | 						 604-pin micro-PGA  | 			1,2,4,5,9,10,11,15,16 | 
| Notes | 			
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