Intel 875P Chipset and Memory Features Configuration
I have a DELL Dimension 8300 computer with a motherboard with an Intel 875P chipset that I am trying to get running.
The computer has two sets (different vendor sets) of DDR SDRAM RAM, 2x1GHB + 2x1GB, configured in dual channel configuration.
When querying chipset feature status using the ctiaw software, I was able to determine that the Intel Performance Acceleration Technology (PAT) would be fully-enabled when a 2x1GB memory set is used individually, but not when the sets are used together (status is reported as "reserved").
Also when the sets are used individually, "Overflowdevice" is disabled, but when the memory sets are used together the feature is enabled.
What is "Overflowdevice" and what is its significance?
How can I get PAT to be automatically configured fully-enabled when the two sets of RAM are used?
The various relevant reports are provided below.
The CPU- Z 1.64.0.x32 data from the modules:
Code:
Memory SPD
-------------------------------------------------------------------------
DIMM # 1
SMBus address 0x50
Memory type DDR
Manufacturer (ID) Mushkin (7F7F7F9400000000)
Size 1024 MBytes
Max bandwidth PC3200 (200 MHz)
Part number 991429B (996429B
Number of banks 2
Data width 64 bits
Correction None
Registered no
Buffered no
Nominal Voltage 2.50 Volts
EPP no
XMP no
AMP no
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 2.0-2-2-6-n.a. @ 133 MHz
JEDEC #2 2.5-3-3-7-n.a. @ 166 MHz
JEDEC #3 3.0-3-3-8-n.a. @ 200 MHz
DIMM # 2
SMBus address 0x51
Memory type DDR
Manufacturer (ID) Hyundai Electronics (AD00000000000000)
Size 1024 MBytes
Max bandwidth PC3200 (200 MHz)
Part number HYMD512 646CP8JD43
Serial number FFFF5028
Manufacturing date Week 40/Year 07
Number of banks 2
Data width 64 bits
Correction None
Registered no
Buffered no
Nominal Voltage 2.50 Volts
EPP no
XMP no
AMP no
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 2.0-2-2-6-n.a. @ 133 MHz
JEDEC #2 2.5-3-3-7-n.a. @ 166 MHz
JEDEC #3 3.0-3-3-8-n.a. @ 200 MHz
DIMM # 3
SMBus address 0x52
Memory type DDR
Manufacturer (ID) Mushkin (7F7F7F9400000000)
Size 1024 MBytes
Max bandwidth PC3200 (200 MHz)
Part number 991429B (996429B
Number of banks 2
Data width 64 bits
Correction None
Registered no
Buffered no
Nominal Voltage 2.50 Volts
EPP no
XMP no
AMP no
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 2.0-2-2-6-n.a. @ 133 MHz
JEDEC #2 2.5-3-3-7-n.a. @ 166 MHz
JEDEC #3 3.0-3-3-8-n.a. @ 200 MHz
DIMM # 4
SMBus address 0x53
Memory type DDR
Manufacturer (ID) Hyundai Electronics (AD00000000000000)
Size 1024 MBytes
Max bandwidth PC3200 (200 MHz)
Part number HYMD512 646CP8JD43
Serial number FFFF5028
Manufacturing date Week 40/Year 07
Number of banks 2
Data width 64 bits
Correction None
Registered no
Buffered no
Nominal Voltage 2.50 Volts
EPP no
XMP no
AMP no
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 2.0-2-2-6-n.a. @ 133 MHz
JEDEC #2 2.5-3-3-7-n.a. @ 166 MHz
JEDEC #3 3.0-3-3-8-n.a. @ 200 MHz
DIMM # 1
SPD registers
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00 80 08 07 0D 0B 02 40 00 04 50 65 00 82 08 00 01
10 0E 04 1C 01 02 20 C0 60 00 75 00 3C 28 3C 28 80
20 60 60 40 40 00 00 00 00 00 00 00 28 28 50 00 00
30 00 00 00 00 00 00 00 00 00 00 00 00 00 00 10 4B
40 7F 7F 7F 94 00 00 00 00 00 39 39 31 34 32 39 42
50 20 28 39 39 36 34 32 39 42 00 00 00 00 00 00 00
60 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
70 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
80 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
90 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
A0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
B0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
C0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
D0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
E0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
F0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
DIMM # 2
SPD registers
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00 80 08 07 0D 0B 02 40 00 04 50 70 00 82 08 00 01
10 0E 04 1C 01 02 20 C0 60 70 75 75 3C 28 3C 28 80
20 60 60 40 40 00 00 00 00 00 37 46 28 28 50 00 00
30 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 A8
40 AD 00 00 00 00 00 00 00 01 48 59 4D 44 35 31 32
50 20 36 34 36 43 50 38 4A 44 34 33 41 41 07 28 FF
60 FF 50 28 00 00 00 00 00 00 00 00 00 00 00 00 37
70 4E 37 37 4E 34 37 38 30 32 31 36 00 00 00 00 00
80 49 4E 54 45 4C 43 6F 72 70 6F 72 61 74 69 6F 6E
90 69 39 31 35 50 47 4E 00 00 00 00 00 00 00 00 00
A0 01 01 00 01 01 01 00 00 00 00 00 00 00 03 00 00
B0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
C0 00 00 00 00 00 00 00 00 87 00 00 00 00 00 00 00
D0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
E0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
F0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
DIMM # 3
SPD registers
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00 80 08 07 0D 0B 02 40 00 04 50 65 00 82 08 00 01
10 0E 04 1C 01 02 20 C0 60 00 75 00 3C 28 3C 28 80
20 60 60 40 40 00 00 00 00 00 00 00 28 28 50 00 00
30 00 00 00 00 00 00 00 00 00 00 00 00 00 00 10 4B
40 7F 7F 7F 94 00 00 00 00 00 39 39 31 34 32 39 42
50 20 28 39 39 36 34 32 39 42 00 00 00 00 00 00 00
60 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
70 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
80 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
90 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
A0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
B0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
C0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
D0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
E0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
F0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
DIMM # 4
SPD registers
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00 80 08 07 0D 0B 02 40 00 04 50 70 00 82 08 00 01
10 0E 04 1C 01 02 20 C0 60 70 75 75 3C 28 3C 28 80
20 60 60 40 40 00 00 00 00 00 37 46 28 28 50 00 00
30 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 A8
40 AD 00 00 00 00 00 00 00 01 48 59 4D 44 35 31 32
50 20 36 34 36 43 50 38 4A 44 34 33 41 41 07 28 FF
60 FF 50 28 00 00 00 00 00 00 00 00 00 00 00 00 37
70 4E 37 37 4E 34 37 38 30 32 31 36 00 00 00 00 00
80 49 4E 54 45 4C 43 6F 72 70 6F 72 61 74 69 6F 6E
90 69 39 31 35 50 47 4E 00 00 00 00 00 00 00 00 00
A0 01 01 00 01 01 01 00 00 00 00 00 00 00 03 00 00
B0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
C0 00 00 00 00 00 00 00 00 87 00 00 00 00 00 00 00
D0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
E0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
F0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Mushkin Set Alone:
Code:
**** INTEL/AMD/VIA memory config info, c't/Andreas Stiller V2.7 June 03 ****
Kernel Driver: WinNT DIRECTNT.SYS V01.09
Pentium 4,(0F29-09)ca 3248 MHz (sleep) 2992 MHz (load)
Bus Speed: max=200MHz, ratio=15 => 199 MHz
Hostdevice: (2578) Canterwood i875 MCH, Vendor: (8086) Intel, Rev:0002h
----------------------------------------------------------------
Intel Canterwood i875 MCH Rev:02: Bus:0, Device-Nr:0, Function:0
System Frequency : FSB800/200 MHz
Memory Frequency : DDR400/200 MHz (1:1)
IOQ Depth : 12 deep
Top of usable Memory : 2048.0 MByte
Extended SMRAM (Tseg) : disabled
Overflowdevice : disabled and unlocked, ID= 257Eh, Rev: 2
Memory Delays Base Address : FECF0000 not prefetchable
CPU Parking : enabled
Memory : row0: 1024 MByte/32 KB Pages
: row1: 1024 MByte/32 KB Pages
DRAM-Channels : Dual Channel Linear, DDR
ECC & Refresh : Non-ECC, Refresh=7.8 ?s
PAT-mode : (1) fully enabled
Active to Precharge Delay : 8 clocks .. 70 ?s
Tcl - Trcd -Trp : 3-3-3 T (DRAM Clocks)
Memory Read Bandwidth : ca. 4656.8 MBytes/s, Cacheline size= 128
>> go on with CR
Hyundai Electronics set alone:
Code:
**** INTEL/AMD/VIA memory config info, c't/Andreas Stiller V2.7 June 03 ****
Kernel Driver: WinNT DIRECTNT.SYS V01.09
Pentium 4,(0F29-09)ca 3270 MHz (sleep) 2992 MHz (load)
Bus Speed: max=200MHz, ratio=15 => 199 MHz
Hostdevice: (2578) Canterwood i875 MCH, Vendor: (8086) Intel, Rev:0002h
----------------------------------------------------------------
Intel Canterwood i875 MCH Rev:02: Bus:0, Device-Nr:0, Function:0
System Frequency : FSB800/200 MHz
Memory Frequency : DDR400/200 MHz (1:1)
IOQ Depth : 12 deep
Top of usable Memory : 2048.0 MByte
Extended SMRAM (Tseg) : disabled
Overflowdevice : disabled and unlocked, ID= 257Eh, Rev: 2
Memory Delays Base Address : FECF0000 not prefetchable
CPU Parking : enabled
Memory : row2: 1024 MByte/32 KB Pages
: row3: 1024 MByte/32 KB Pages
DRAM-Channels : Dual Channel Linear, DDR
ECC & Refresh : Non-ECC, Refresh=7.8 ?s
PAT-mode : (1) fully enabled
Active to Precharge Delay : 8 clocks .. 70 ?s
Tcl - Trcd -Trp : 3-3-3 T (DRAM Clocks)
Memory Read Bandwidth : ca. 4687.7 MBytes/s, Cacheline size= 128
>> go on with CR
Mushkin and Hyundai Electronics sets together:
Code:
**** INTEL/AMD/VIA memory config info, c't/Andreas Stiller V2.7 June 03 ****
Kernel Driver: WinNT DIRECTNT.SYS V01.09
Pentium 4,(0F29-09)ca 3270 MHz (sleep) 2992 MHz (load)
Bus Speed: max=200MHz, ratio=15 => 199 MHz
Hostdevice: (2578) Canterwood i875 MCH, Vendor: (8086) Intel, Rev:0002h
----------------------------------------------------------------
Intel Canterwood i875 MCH Rev:02: Bus:0, Device-Nr:0, Function:0
System Frequency : FSB800/200 MHz
Memory Frequency : DDR400/200 MHz (1:1)
IOQ Depth : 12 deep
Top of usable Memory : 3328.0 MByte
Extended SMRAM (Tseg) : disabled
Overflowdevice : enabled and unlocked, ID= 257Eh, Rev: 2
Memory Delays Base Address : FECF0000 not prefetchable
CPU Parking : enabled
Memory : row0: 1024 MByte/32 KB Pages
: row1: 1024 MByte/32 KB Pages
: row2: 1024 MByte/32 KB Pages
: row3: 1024 MByte/32 KB Pages
DRAM-Channels : Dual Channel Linear, DDR
ECC & Refresh : Non-ECC, Refresh=7.8 ?s
PAT-mode : (0) reserved
Active to Precharge Delay : 8 clocks .. 70 ?s
Tcl - Trcd -Trp : 3-3-3 T (DRAM Clocks)
Memory Read Bandwidth : ca. 4707.9 MBytes/s, Cacheline size= 128
>> go on with CR
