Last Revised AST RESEARCH, INC. INFORMATIONAL BULLETIN # 0019 10/14/97 TITLE: Second CPU Compatibility Manhattan P/V SUMMARY Several different versions or "steppings" of Pentium CPUs are available. Manhattan P and V servers must use the proper combination of these CPUs in order to function properly. Some symptoms of dual processor incompatibility are: When installing a second CPU in a Manhattan P/V system, the customer may experience a problem booting or the second processor will not be recognized by an operating system such as Windows NT server 3.51. This issue affects the following systems: 501500, 501501, 501502, 501503, and 501830. NOTES Several different versions or "steppings" of Pentium CPUs are available. Manhattan P and V servers must use the proper combination of these CPUs in order to function properly. Some symptoms of dual processor incompatibility are: When installing a second CPU in a Manhattan P/V system, the customer may experience a problem booting or the second processor will not be recognized by an operating system such as Windows NT server 3.51. The processor board MUST be a current revision to ensure proper support for dual processors. Refer to TB# 1354 for a list of part numbers and revision levels for the processor boards. This issue affects the following systems: 501500, 501501, 501502, 501503, and 501830. There are two ways to determine a processor's "stepping": 1. On the CPU chip itself (top and bottom sides). 2. A software utility that reads Intel proprietary information stored in the CPU. Please use the following table to determine which CPU IC to use in each socket of a 202619 CPU board (60/90, 66/100, or 66/133). These are the ONLY acceptable combinations. If a combination is not listed here, do NOT use it. PCBA part number 202619, built for 100MHz or 133 MHz CPUs (e.g. 202619-113), should NOT be downgraded in speed to use the B1 or B3 CPU steppings. If they are, the boards will work with a single CPU but will not work correctly with dual CPUs. Primary CPU Secondary CPU Freq Marking/Step Marking/Step 90MHz SX879/B1 SX874/B1 90MHz SX879/B1 SX942/B3 90MHz SX879/B1 SX957/B5 90MHz SX879/B1 SX968/C2 90MHz SX923/B3 SX874/B1 90MHz SX923/B3 SX942/B3 90MHz SX923/B3 SX957/B5 90MHz SX923/B3 SX968/C2 90MHz SX957/B5 SX874/B1 90MHz SX957/B5 SX942/B3 90MHz SX957/B5 SX957/B5 90MHz SX957/B5 SX968/C2 90MHz SX968/C2 SX874/B1 90MHz SX968/C2 SX942/B3 90MHz SX968/C2 SX957/B5 90MHz SX968/C2 SX968/C2 100MHz SX963/C2 SX963/C2 133MHz SK106/cB1 SK106/cB1 133MHz SK106/cB1 SK107/cB1 133MHz SK107/cB1 SK106/cB1 133MHz SK107/cB1 SK107/cB1 The following additions do not use the P5ID.EXE file to view the stepping. You must look at the processor chip to identify the stepping. 133MHz SK106/SSS SY022/SSS 133MHz SY022/SSS SY022/SSS For additional information on dual processor configurations, see Technical Bulletin # 1286. Contact AST's Technical Support at (800) 727-1278 to verify that the processor board in your system is at the correct revision level to support dual processors. File P5ID.EXE identifies the primary CPU's stepping. This file is available from any of AST's On-Line! services as follows: AST WWW Site: http://www.ast.com AST On-Line! BBS*: See IB0001.TXT CompuServe: GO: ASTFORUM Prodigy: JUMP: ASTSUPPORT * Refer to IB0001.TXT for a list of AST's international BBS numbers. To decompress this file, create a temporary directory on your hard drive, copy the downloaded file to that directory, and run the file. TAN 002120DZ, 001241EM --------------------------------------------------------------------- The information in this data sheet is subject to change without notice. AST Research, Inc. shall not be liable for technical or editorial errors or omissions contained herein; nor for incidental or consequential damages resulting from the furnishing, performance, or use of this material. This material contains information protected by copyright. No part of this material may be reproduced in any form without prior written consent from AST Research, Inc. All rights reserved. --------------------------------------------------------------------- Template Rev 02