Processor	80486SX/CX486S/80487SX/CX486S2/80486DX/Am486DX/CX486DX/ODP486SX/80486DX2/Am468DX2/Cx486DX2/80486DX4/Pentium Overdrive
Processor Speed	20/25/33/40/50/50(internal)/66i/75i/100iMHz
Chip Set	OPTI
Max. Onboard DRAM	128MB
Cache	64/128/256/512KB
BIOS	AMI
Dimensions	220mm x 260mm
I/O Options	32-bit VESA local bus slots (3), Green PC feature
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	J1	Green monitor power supply	JP63
Power LED & keylock	JP2	External power management interface	JP68
Turbo LED	JP16	Reset switch	S1
Turbo switch	JP17	32-bit VESA Local bus slots	SL1,SL2,SL3
Speaker	JP18

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Monitor type select color	JP30	Closed
	Monitor type select monochrome	JP30	Open
»	Normal CPU ADS# operation	JP36	pins 2 & 3
	Delay CPU ADS# clock operation	JP36	pins 1 & 2
»	Power to CPU set at 5V	JP64	pins 1 & 3, 2 & 4
	Power to CPU set at 3.3V (for Intel DX4 CPU)	JP64	pins 4 & 6, 3 & 5
	Set CPU external operation clock to 3X	JP65	Open
	Set CPU external operation clock to 2X	JP65	Closed
	Cache size enabled 64KB or 256KB	JP67	Closed
	Cache size enabled 128KB or 512KB	JP67	Open
Note:Jumper JP65, for any type of CPU other than above listed, leave "Open".

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
2MB	(1) 256K x 36	(1) 256K x 36	NONE	NONE
4MB	(1) 256K x 36	(1) 256K x 36	(1) 256K x 36	(1) 256K x 36
4MB	(1) 1M x 36	NONE	NONE	NONE
5MB	(1) 256K x 36	(1) 1M x 36	NONE	NONE
8MB	(1) 1M x 36	(1) 1M x 36	NONE	NONE
10MB	(1) 256K x 36	(1) 256K x 36	(1) 1M x 36	(1) 1M x 36
12MB	(1) 1M x 36	NONE	(1) 1M x 36	(1) 1M x 36
16MB	(1) 4M x 36	NONE	NONE	NONE
16MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
20MB	(1) 1M x 36	(1) 4M x 36	NONE	NONE
20MB	(1) 1M x 36	NONE	(1) 4M x 36	NONE
32MB	(1) 4M x 36	(1) 4M x 36	NONE	NONE
64MB	(1) 16M x 36	NONE	NONE	NONE
64MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36
128MB	(1) 16M x 36	(1) 16M x 36	NONE	NONE
128MB	(1) 16M x 36	NONE	(1) 16M x 36	NONE

CACHE CONFIGURATION
Size	Bank 0	Bank 1	TAG
64KB	(4) 8K x 8	(4) 8K x 8	(1) 8K x 8
128KB	(4) 32K x 8	NONE	(1) 32K x 8
256KB	(4) 32K x 8	(4) 32K x 8	(1) 32K x 8
512KB	(4) 128K x 8	NONE	(1) 32K x 8

CACHE JUMPER CONFIGURATION
Size	JP10	JP11	JP13	JP50
64KB	Open	Open	pins 2 & 3 closed	Open
128KB	Open	Closed	pins 1 & 2 closed	Open
256KB	Closed	Closed	pins 2 & 3 closed	Open
512KB	Closed	Closed	pins 1 & 2 closed	Closed

INTERNAL CACHE TYPE CONFIGURATION
CPU Type	Internal Cache Type	JP58	JP59
P24T	Write-Through	Open	N/A
P24T	Write-Back	Closed	N/A
P24D	Write-Through	N/A	Open
P24D	Write-Back	N/A	Closed

CPU TYPE CONFIGURATION
CPU Type	JP3	JP5	JP8	JP42	JP43	JP44
80486SX	Open	Open	pins 2 & 3	Open	pins 1 & 2	Open
AM486	pins 1 & 2	pins 2 & 3	pins 1 & 2	Open	pins 1 & 2	Open
Cx486S	Open	Open	pins 2 & 3	pins 2 & 3	pins 1 & 2	Open
80487SX	pins 2 & 3	pins 2 & 3	pins 1 & 2	Open	pins 1 & 2	Open
Cx486S2	Open	Open	pins 2 & 3	pins 2 & 3	pins 2 & 3	Open
80486DX	pins 1 & 2	pins 2 & 3	pins 1 & 2	Open	pins 1 & 2	Open
Cx486DX	pins 1 & 2	pins 2 & 3	pins 1 & 2	pins 2 & 3	pins 1 & 2	Open
Cx486DX2	pins 1 & 2	pins 2 & 3	pins 1 & 2	pins 2 & 3	pins 2 & 3	Open
P24C (DX4)	pins 1 & 2	pins 2 & 3	pins 1 & 2	pins 1 & 2	pins 1 & 2	Closed
P24T	pins 2 & 3	pins 2 & 3	pins 1 & 2	Open	pins 1 & 2	Open
P24D	pins 2 & 3	pins 2 & 3	pins 1 & 2	Open	pins 1 & 2	Open
Note:Pins designated are in the closed position.

CPU TYPE CONFIGURATION (CONTINUED)
CPU Type	JP45	JP46	JP47	JP48	JP49
80486SX	Open	Open	Open	Open	pins 1 & 2
AMD486	Open	Open	Open	Open	pins 1 & 2
Cx486S	Open	Open	Closed	Closed	pins 1 & 2
80487SX	Open	Open	Open	Open	pins 1 & 2
Cx486S2	Open	Open	Closed	Closed	pins 2 & 3
80486DX	Open	Open	Open	Open	pins 1 & 2
Cx486DX	Open	Open	Closed	Closed	pins 1 & 2
Cx486DX2	Open	Open	Closed	Closed	pins 2 & 3
P24C (DX4)	Closed	Closed	Open	Open	pins 1 & 2
P24T	Open	Open	Open	Open	pins 1 & 2
P24D	Open	Open	Open	Open	pins 1 & 2
Note:Pins designated are in the closed position.

CPU TYPE (S-SERIES) CONFIGURATION
CPU Type	JP3	JP5	JP8	JP42	JP43	JP44
80486SX	Open	Open	pins 2 & 3	pins 1 & 2	pins 1 & 2	Closed
80486DX	pins 1 & 2	pins 2 & 3	pins 1 & 2	pins 1 & 2	pins 1 & 2	Closed
Note:Pins designated are in the closed position.

CPU TYPE (S-SERIES) CONFIGURATION
CPU Type	JP45	JP46	JP47	JP48	JP49
80486SX	Closed	Closed	Open	Open	pins 1 & 2
80486DX	Closed	Closed	Open	Open	pins 1 & 2
Note:Pins designated are in the closed position.

BUS SPEED (ID3) CONFIGURATION
CPU speed	JP34
<= 33MHz	Open
> 33MHz	Closed

VESA WAIT STATE (ID2) CONFIGURATION
Wait states	JP33
0 wait states	Open
1 wait state	Closed

SYSTEM CLOCK (NOT FOR P24C) CONFIGURATION
Frequency	JP21	JP22	JP23
20MHz	pins 2 & 3 closed	pins 2 & 3 closed	pins 1 & 2 closed
25MHz	pins 2 & 3 closed	pins 1 & 2 closed	pins 2 & 3 closed
33MHz	pins 1 & 2 closed	pins 2 & 3 closed	pins 2 & 3 closed
40MHz	pins 2 & 3 closed	pins 1 & 2 closed	pins 1 & 2 closed
50MHz	pins 1 & 2 closed	pins 2 & 3 closed	pins 1 & 2 closed

SYSTEM CLOCK (FOR P24C (DX4)) CONFIGURATION
Frequency	JP21	JP22	JP23
25MHz	pins 2 & 3 closed	Open	pins 2 & 3 closed
33MHz	Open	pins 2 & 3 closed	pins 2 & 3 closed
50MHz	Open	pins 2 & 3 closed	Open