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D
946GZT-AM Rev: A Page Title of Schematic :
Title Page Title Page
D

Schematics Version History Table : Cover Sheet 1 ISL Vcore DC-DC 35
Circuit Ver. PCB Ver. Total Page Modified Page(s) Date System Block Diagram 2 ISL DDR& SYSTEM DC-DC 36
A A 44 06/05/10 P4 LGA775P Part A 3 MIS DC-DC POWER 37
P4 LGA775P Part B 4 I/O Ports 38
P4 LGA775P Part C 5 RTL8100C Lan 39
P4 LGA775P Part D 6 TPM (TRUSTED PF-MODELE) 40
P4 LGA775P Part E 7 Change list 41
Clock ICS(9LPR505) 8 RESET Diagram 42
BW(MCH)Part A & E 9 CLOCK DISTRIBUTION 43
BW(MCH)Part B 10 Power Delivery 44
C C
BW(MCH)Part C&D 11
BW(MCH)Part F 12
BW(MCH)Part G 13
MCH DCPL 14
DIMM1 (DDR2 SDRAM) 15
DIMM2 (DDR2 SDRAM) 16
DIMM DECOUPING 17
VGA CONNECT 18
ICH7 Part A & D 19
ICH7 Part B & C 20
B ICH7 Part E & F 21 B



BMC5786 22
SATA & IDE Connector 23
FMH&SPI 24
H/W Monitor 25
ITE8718 LPC I/O 26
Audio Codec 27
Audio Interface 28
ATX Power & Front Panel 29
PCI Slot 1&2 30
PCIE Slot 1 31
A A

PCI Express 16-PORT 32
Back I/O 33 Elitegroup Computer Systems
TI TSB43AB23 34
Cover Sheet
Title


Size Document Number Rev
A
Custom
Date:
946GZT-AM
Tuesday, May 23, 2006 Sheet 1 of 44
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PCI LAN ICH7
ALC888
SIZE : Max 2GB (Four 512Mb X 8 Double-Sided DEVICES)
DEVICE IDSEL INT# REQ# GNT#
PCI1 17 C/D/E/F PREQ-0 PGNT-0
D
INTEL D

PCI2 18 D/E/F/G PREQ-1 PGNT-1
P4 Processor
1394 19 E PREQ-2 PGNT-2
LAN 20 F PREQ-3 PGNT-3 PSC, Tejas -
LGA 775 pin


BW : 4.1GB/s @ FSB : 533MHz & Freq : 133MHz
BW : 6.4GB/s @ FSB : 800MHz & Freq : 200MHz


BW : 10.7GB/s @ DDR2 :533/667MHz
Analong Display INTEL
RAMDAC: 400MHz VGA (G only) DDIMM1: DDR Socket 184P
I-GDS/G
Resolutions Up To 2048x1536@75Hz
C C


PCIEx16 1210pin FC-BGA
DDIMM2 : DDR Socket 184P
BW : 2GB/s (Support Lsoch)
USB V2.0 PCIEX1
USB1 USB2 USB3 USB4 USBLAN USBLAN
2 ports 2 ports 2 ports 2 ports 8 ports INTEL PCIEx1 LAN
RJ45
BMC5786
Up to Ultra ATA/100 ICH7
IDE1 40pin BW : 133MB/s @Freq : 33MHz
Two IDE Channel 609pin EBGA
Mic In PCI1 Slot 120pin @ AD17
Audio Codec AC' 97 & Lan I/F
Line Out PCI2 Slot 120pin @ AD18
ALC888
Line In LPC bus

B CEN/BAS intel B
FWH TI 1394 RTL
SURRON SATA1 7Pin 32pin PLCC TSB43AB22 8100C
SID SURRON SATA2 7pin ITE 8718
SATA3 7Pin BW : 150MB/s Super I/O
SATA4 7pin 128pin PQFP

USBLAN
RJ45




PCB : 244 x 244 mm ; 4 layers

A A




Elitegroup Computer Systems
Title
946-System Block DiagamM
Size Document Number Rev
Custom 946GZT-AM A
Date: Tuesday, May 23, 2006 Sheet 2 of 44

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ICT_775_E23 1 STP2
ICT_775_E7 1 STP9
ICT_775_F23 1 STP3




R387 Pull Down to Select 50 Ohm System bus Impedance
47-04 H_VCCPLL

D D

VTT_OUT_L 47-04 R428 COMP8 ER10 24.9-1-04 MC3 C193
10u-10V-08-O .01u-Y-04
R400 47-04

MC28 R418 47-04

COMP6 R405 49.9-1-04 VTT_OUT_R
10u-10V-08 STP8 STP10 H_VCCPLL
H_VCCPLL 12
FORCEPH_N
FORCEPH_N 35
MCH_GTLREF_CPU CPUVID0
10 MCH_GTLREF_CPU CPUVID0 35
CPUVID1




1




1
CPUVID1 35
VSSSEN VSS_SENSE_AN6 CPUVID2
35 VSSSEN CPUVID2 35
R293 0-04-O CPUVID3 VTT_OUT_R
CPUVID3 35
VCCSEN VCC_SENSE_AN5 CPUVID4
35 VCCSEN CPUVID4 35
R296 0-04-O CPUVID5
CPUVID5 35
COMP7 CPUVID6 R426 130-1-04-O
VTT_OUT_R CPUVID6 35
R385 49.9-1-04 CPUVID7 FORCEPH_N 1 2
CPUVID7 35
VR_SEL 35




1
C347 R440 0-04
.1u-16VY-04-OCPU1A C348




AM2

AM3



AM5
AM7
AC4



AH2
AN5
AN6




AN7
AE3
AE4
AE6




G10




AK6




AK4
D14
D16




D23
A20




E23
E24




B13




AL5

AL6

AL4
F23
F29
VTT_OUT_R




W1



G6
C9
D1




N4
N5
LGA-775PS-AMP R439 680-04




E5
E6
E7




P5
V1

Y3
1u-25V




F6


J3




2
RESERVED0
RESERVED1
RESERVED2
RESERVED3
RESERVED4
RESERVED5
RESERVED7
RESERVED8
RESERVED9




IMPSEL




MSID1
MSID0




VID0
VID1
VID2
VID3
VID4
VID5
VID6
VID7
RESERVED10
RESERVED11
RESERVED12
RESERVED13
RESERVED14
RESERVED15
RESERVED16
RESERVED17
RESERVED18
RESERVED19

RESERVED21
RESERVED22
RESERVED25
RESERVED26
RESERVED27
RESERVED28


RESERVED32
RESERVED33
RESERVED34
RESERVED35




VID_SELECT
H_D0 B4 L5 H_A3
10 H_D0 D0 A3 H_A3 10
H_D1 C5 P6 H_A4
10 H_D1 D1 A4 H_A4 10
H_D2 A4 M5 H_A5
10 H_D2 D2 A5 H_A5 10
H_D3 C6 L4 H_A6
10 H_D3 D3 A6 H_A6 10
H_D4 A5 M4 H_A7
10 H_D4 D4 A7 H_A7 10
H_D5 B6 R4 H_A8
10 H_D5 D5 A8 H_A8 10
H_D6 B7 T5 H_A9
C 10 H_D6 D6 A9 H_A9 10 VTT_OUT_R C
H_D7 A7 U6 H_A10
10 H_D7 D7 A10 H_A10 10
H_D8 A10 T4 H_A11
10 H_D8 D8 A11 H_A11 10
H_D9 A11 U5 H_A12
10 H_D9 D9 A12 H_A12 10
H_D10 B10 U4 H_A13
10 H_D10 D10 A13 H_A13 10
H_D11 C11 V5 H_A14
10 H_D11 D11 A14 H_A14 10
H_D12 D8 V4 H_A15 H_BPM0 R430 62-04
10 H_D12 D12 A15 H_A15 10
H_D13 B12 W5 H_A16
10 H_D13 D13 A16 H_A16 10
H_D14 C12 AB6 H_A17 H_BPM1 R434 62-04
10 H_D14 D14 A17 H_A17 10
H_D15 D11 W6 H_A18
10 H_D15 D15 A18 H_A18 10
H_D16 G9 Y6 H_A19 H_BPM2 R413 62-04
10 H_D16 D16 A19 H_A19 10
H_D17 F8 Y4 H_A20
10 H_D17 D17 A20 H_A20 10
H_D18 F9 AA4 H_A21 H_BPM3 R421 62-04
10 H_D18 D18 A21 H_A21 10
H_D19 E9 AD6 H_A22
10 H_D19 D19 A22 H_A22 10
H_D20 D7 AA5 H_A23 H_BPM4 R402 62-04
10 H_D20 D20 A23 H_A23 10
H_D21 E10 AB5 H_A24
10 H_D21 D21 A24 H_A24 10
H_D22 D10 AC5 H_A25 H_BPM5 R414 62-04
10 H_D22 D22 A25 H_A25 10
H_D23 F11 AB4 H_A26
10 H_D23 D23 A26 H_A26 10
H_D24 F12 AF5 H_A27
10 H_D24 D24 A27 H_A27 10
H_D25 D13 AF4 H_A28
10 H_D25 D25 A28 H_A28 10
H_D26 E13 AG6 H_A29
10 H_D26 D26 A29 H_A29 10
H_D27 G13 AG4 H_A30
10 H_D27 H_D28 F14
D27 A30
AG5 H_A31
H_A30 10 Please BPM TERMINATION NEAR to CPU
10 H_D28 D28 A31 H_A31 10
H_D29 G14 AH4 H_A32
10 H_D29 D29 A32 H_A32 10
H_D30 F15 AH5 H_A33
10 H_D30 D30 A33 H_A33 10
H_D31 G15 AJ5 H_A34
10 H_D31 D31 A34 H_A34 10
H_D32 G16 AJ6 H_A35
10 H_D32 D32 A35 H_A35 10
H_D33 E15
10 H_D33 H_D34 D33
10 H_D34 E16 D34
H_D35 G18 AJ2 H_BPM0
10 H_D35 H_D36 D35 BPM0 H_BPM1
10 H_D36 G17 D36 BPM1 AJ1
H_D37 F17 AD2 H_BPM2
B 10 H_D37 H_D38 D37 BPM2 H_BPM3 B
10 H_D38 F18 D38 BPM3 AG2
H_D39 E18 AF2 H_BPM4
10 H_D39 H_D40 D39 BPM4 H_BPM5
10 H_D40 E19 D40 BPM5 AG3
H_D41 F20
10 H_D41 H_D42 D41
10 H_D42 E21 D42
H_D43 F21 J16 ICT_775_J16 1 STP6
10 H_D43 H_D44 D43 DP0 ICT_775_H15
10 H_D44 G21 D44 DP1 H15 1 STP7
H_D45 E22 H16 ICT_775_H16 1 STP5
10 H_D45 H_D46 D45 DP2 ICT_775_J17
10 H_D46 D22 D46 DP3 J17 1 STP4
H_D47 G22
10 H_D47 H_D48 D47 TESTHI0 R196 47-04
10 H_D48 D20 D48 FSBVTT
H_D49 D17 K4 H_REQ0
10 H_D49 D49 REQ0 H_REQ0 10
H_D50 A14 J5 H_REQ1 TESTHI_7 R190 47-04
10 H_D50 D50 REQ1 H_REQ1 10
H_D51 C15 M6 H_REQ2
10 H_D51 D51 REQ2 H_REQ2 10
H_D52 C14 K6 H_REQ3 TESTHI1 R384 47-04 VTT_OUT_L
10 H_D52 D52 REQ3 H_REQ3 10
H_D53 B15 J6 H_REQ4
10 H_D53 D53 REQ4 H_REQ4 10
H_D54 C18 TESTHI8 R381 47-04
10 H_D54 H_D55 D54
10 H_D55 B16 D55
H_D56 A17 AE8 TESTHI9 R390 47-04
10 H_D56 H_D57 D56 SKTOCC
10 H_D57 B18 D57
H_D58 C21 TESTHI10 R403 47-04
10 H_D58 H_D59 D58 TESTHI0
10 H_D59 B21 D59 TESTH0 F26
H_D60 B19 W3 TESTHI1 TESTHI11 R383 47-04
10 H_D60 H_D61 D60 TESTH1
10 H_D61 A19 D61 TESTH2 F25
H_D62 A22 G25 TESTHI12 R392 47-04
10 H_D62 H_D63 D62 TESTH3
10 H_D63 B22 D63 TESTH4 G27
TESTH5 G26
TESTH6 G24 Please Rs & CAPs Close to CPU
H_RS0_L B3 F24 TESTHI_7
10 H_RS0_L H_RS1_L RS0 TESTH7 TESTHI8
10 H_RS1_L F5 RS1 TESTH8 G3
H_RS2_L A3 G4 TESTHI9
10 H_RS2_L RS2 TESTH9 TESTHI10
A
TESTH10 H5 A
P1 TESTHI11
TESTH11 TESTHI12
TESTH12 W2 TESTHI12 6


BOOTSELECT Y1
Elitegroup Computer Systems
LGA 775 Part A
Title


Size Document Number Rev
Custom 946GZT-AM A
Date: Tuesday, May 23, 2006 Sheet 3 of 44
5 4 3 2 1
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CPUGTLREF1 R417 124-1-04 VTT_OUT_R VTT_OUT_R




1
R397 C338 R410
C336 10-1-04 1u-25V 210-1-04 C340
220P-N-04-O .01u-Y-04




2
R382
0-04-O


Place componets as close as possible to Processor socket
trace width to cap must be no smaller than 12 Mils CPUGTLREF0 R431 124-1-04 VTT_OUT_R VTT_OUT_R




1
R396 C341 R427
D D
C335 10-1-04 1u-25V 210-1-04 C333
220P-N-04-O .01u-Y-04 GTLREF= 0.67 * VTT = 0.8V




2
GTLREF GENERATION CIRCUITS




H29

H2

H1
R195 0-04-O
CPU1B
FSBVTT 1 2




GTLREF_SEL

GTLREF1

GTLREF0
C198 1u-25V K3 A20M_L
A20M A20M_L 20
C23 D2 H_ADS_L
VCCIOPLL ADS H_ADS_L 10
L22 IND-10u-08 R6 H_A_STB0 H_IERR_L R393 62-04 VTT_OUT_R
ADSTB0 H_A_STB0 10
A23 AD5 H_A_STB1
VCCA ADSTB1 H_A_STB1 10
L21 IND-10u-08 AD3
EC45 100u-16D6.3H11EG-LU