Dead RAM works in Sandra but not Win2K?

I bought a new stick of 128MB SDRAM recently and it was DOA. I then got a replacement that was good. Thing is, when I put my dimms (the dead one in slot 1, the origional in slot 2, and the new one in slot three) Windows finds 256MB of RAM - as expected. But I then ran Sandra's SPDInfo tool and it came up with this:
<DOS Session>
Microsoft(R) Windows DOS
(C)Copyright Microsoft Corp 1990-1999.

C:\>cd progra~1\sisoft~1\sisoft~2

C:\PROGRA~1\SISOFT~1\SISOFT~2>spdinfo 1 7zx

SiSoftware SIMM/DIMM/RIMM SPD Analyser - Version 8.5x
(c) Copyright Catalin-Adrian Silasi 1998-2002
Distributed by SiSoftware (* DO NOT DISTRIBUTE *)
All Rights Reserved.

Part of SiSoftware Sandra(tm) Professional.
Not to be used/distributed outside the package.

1 SMB/i2c Controller(s) enabled

Ctrl 0, SMBus, Sys, IO 00000400h, Mem 00000000h, Drv Intel PIIX4 SMBus / compati
ble, Brd 7ZX
Hex dump of SPD information
000: 80 08 04 0C 09 01 40 00 01 A0 60 00 80 08 00 01
016: 8F 04 06 01 01 00 0E F0 90 00 00 14 14 14 32 10
032: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
048: FF FF FF FF FF FF FF FF FF FF FF FF FF FF 12 07
064: 7F D0 00 00 00 00 00 00 FF 44 4D 38 36 34 56 53
080: 36 35 38 30 34 2D 31 30 33 47 FF FF FF FF FF FF
096: FF FF FF 4D 45 4D 4F 52 59 20 43 41 52 44 20 54
112: 45 43 48 4E 4F 4C 4F 47 59 20 41 2F 53 20 64 A4

Detailed information

No bytes in SPD : 128
Total No of Bytes : 256
Memory Type : SDRAM
No. Module Rows : 1
Module Data Width : 64-bit
Address Row/Columns : 12 / 9 bits
SDRAM Width : x8
Burst Lengths Support: page 8 4 2 1
No. Banks : 4
CL Latencies Support : 3 2
CS Latencies Support : 0
WE Latencies Support : 0
Cycle Time High CAS : 10.0ns -> 100MHz
Access Time High CAS : 6.00ns
Cycle Time Low CAS : 15.0ns -> 67MHz
Access Time Low CAS : 9.00ns
Device Attributes : W1RB PreChrgAll AutoPreChrg
Min. Row Precharge : 20ns
Min. RowA to RowA : 20ns
Min. RAS to CAS Delay: 20ns
Min. RAS Pulse Width : 50ns
Module Size : 64MB
SPD Version : 1.2
Manufacturer Code : 7F D0 00 00 00 00 00 00
Part No. : DM864VS65804-103G 
Manufacturer Data : MEMORY CARD TECHNOLOGY A/S
Manufacture Location : FF
Revision Code : 255.255
Manufacture Date : 'FF week FF
Serial Number : FFFFFFFF
Intel Spec. Frequency: PC100
Intel PC100 Spec : CL3

Standard spec. string info

Memory Card Tech DM864VS65804-103G 64MB 8x(8Mx8) SDRAM PC100-322-622 (CL3 upto 1
00MHz) (CL2 upto 67MHz)

C:\PROGRA~1\SISOFT~1\SISOFT~2>spdinfo 2 7zx

SiSoftware SIMM/DIMM/RIMM SPD Analyser - Version 8.5x
(c) Copyright Catalin-Adrian Silasi 1998-2002
Distributed by SiSoftware (* DO NOT DISTRIBUTE *)
All Rights Reserved.

Part of SiSoftware Sandra(tm) Professional.
Not to be used/distributed outside the package.

1 SMB/i2c Controller(s) enabled

Ctrl 0, SMBus, Sys, IO 00000400h, Mem 00000000h, Drv Intel PIIX4 SMBus / compati
ble, Brd 7ZX
Hex dump of SPD information
000: 80 08 04 0C 09 02 40 00 01 A0 60 00 80 08 00 01
016: 8F 04 04 01 01 00 0F 00 00 00 00 14 14 14 32 10
032: 20 10 20 10 00 00 00 00 00 00 00 00 00 00 00 00
048: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 12 05
064: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
096: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
112: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 64 F6

Detailed information

No bytes in SPD : 128
Total No of Bytes : 256
Memory Type : SDRAM
No. Module Rows : 2
Module Data Width : 64-bit
Address Row/Columns : 12 / 9 bits
SDRAM Width : x8
Burst Lengths Support: page 8 4 2 1
No. Banks : 4
CL Latencies Support : 3
CS Latencies Support : 0
WE Latencies Support : 0
Cycle Time High CAS : 10.0ns -> 100MHz
Access Time High CAS : 6.00ns
Device Attributes : W1RB PreChrgAll AutoPreChrg EarlyRASPreChrg
Min. Row Precharge : 20ns
Min. RowA to RowA : 20ns
Min. RAS to CAS Delay: 20ns
Min. RAS Pulse Width : 50ns
Module Size : 128MB
SPD Version : 1.2
Manufacturer Code : 00 00 00 00 00 00 00 00
Part No. :
Manufacturer Data :
Serial Number : 00000000
Intel Spec. Frequency: PC100
Intel PC100 Spec : CL3 CL2

Standard spec. string info

128MB 16x(8Mx8) SDRAM PC100-322-622 (CL3 upto 100MHz)

C:\PROGRA~1\SISOFT~1\SISOFT~2>spinfo 3 7za
'SPINFO' is not recognized as an internal or external command,
operable program or batch file.

C:\PROGRA~1\SISOFT~1\SISOFT~2>spdinfo 3 7zx

SiSoftware SIMM/DIMM/RIMM SPD Analyser - Version 8.5x
(c) Copyright Catalin-Adrian Silasi 1998-2002
Distributed by SiSoftware (* DO NOT DISTRIBUTE *)
All Rights Reserved.

Part of SiSoftware Sandra(tm) Professional.
Not to be used/distributed outside the package.

1 SMB/i2c Controller(s) enabled

Ctrl 0, SMBus, Sys, IO 00000400h, Mem 00000000h, Drv Intel PIIX4 SMBus / compati
ble, Brd 7ZX
Hex dump of SPD information
000: 80 08 04 0C 09 02 40 00 01 75 54 00 80 08 00 01
016: 8F 04 06 01 01 00 0E 00 00 00 00 14 0F 14 2D 10
032: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
048: FF FF FF FF FF FF FF FF FF FF FF FF FF FF 12 47
064: 7F D0 00 00 00 00 00 00 FF 44 4D 31 36 36 35 56
080: 53 36 35 38 30 34 58 2D 37 41 47 FF FF FF FF FF
096: FF FF FF 4D 45 4D 4F 52 59 20 43 41 52 44 20 54
112: 45 43 48 4E 4F 4C 4F 47 59 20 41 2F 53 20 64 F5

Detailed information

No bytes in SPD : 128
Total No of Bytes : 256
Memory Type : SDRAM
No. Module Rows : 2
Module Data Width : 64-bit
Address Row/Columns : 12 / 9 bits
SDRAM Width : x8
Burst Lengths Support: page 8 4 2 1
No. Banks : 4
CL Latencies Support : 3 2
CS Latencies Support : 0
WE Latencies Support : 0
Cycle Time High CAS : 7.5ns -> 133MHz
Access Time High CAS : 5.40ns
Device Attributes : W1RB PreChrgAll AutoPreChrg
Min. Row Precharge : 20ns
Min. RowA to RowA : 15ns
Min. RAS to CAS Delay: 20ns
Min. RAS Pulse Width : 45ns
Module Size : 128MB
SPD Version : 1.2
Manufacturer Code : 7F D0 00 00 00 00 00 00
Part No. : DM1665VS65804X-7AG
Manufacturer Data : MEMORY CARD TECHNOLOGY A/S
Manufacture Location : FF
Revision Code : 255.255
Manufacture Date : 'FF week FF
Serial Number : FFFFFFFF
Intel Spec. Frequency: PC100
Intel PC100 Spec : CL3 ConAP

Standard spec. string info

Memory Card Tech DM1665VS65804X-7AG 128MB 16x(8Mx8) SDRAM PC133U-333-542 (CL3 up
to 133MHz)

C:\PROGRA~1\SISOFT~1\SISOFT~2>
<END DOS Session>

I couldn't belive it but after a few reboots it was still the same. I then ran Sandra's Mainborad Info test in Windows and got this:

< System Mainboard >
Manufacturer: Gigabyte Technology Co., Ltd.
MP Support: No
Model: 7ZX
Version: 1.0
Serial Number: 00000000
BIOS ID: 62-0502-001199-00101111-071595-KT133

< Memory Controller >
Error Detection Method: None
Supported/Current Memory Interleave: 4 way / 4 way
Number of Memory Slots: 3
Maximum Installable Memory: 1536MB
Maximum Module Size: 512MB
Supported Memory Types: Parity, DIMM, SDRAM
Supported Memory Voltages: 3.3V

< Physical/BIOS Memory Banks >
DIMM1: Empty
DIMM2 (RASL-2 RASL-3): 128MB DIMM SDRAM double-bank
DIMM3 (RASL-4 RASL-5): 128MB DIMM SDRAM double-bank

< System Chipset >
Model: Giga-Byte Technology VT8363/5 KT133/KM133 System
Controller
Bus(es): ISA AGP PCI USB SMBus/i2c
Front Side Bus Speed: 2x 100MHz (200MHz data rate)
In Order Queue Depth: 4 req(s)

< Logical/Chipset Memory Banks >
Bank 2 Setting: 64MB SDRAM 6-1-1-1R 4-1-1-1W 2-3-3CL
Bank 3 Setting: 64MB SDRAM 6-1-1-1R 4-1-1-1W 2-3-3CL
Bank 4 Setting: 64MB SDRAM 6-1-1-1R 4-1-1-1W 2-3-3CL
Bank 5 Setting: 64MB SDRAM 6-1-1-1R 4-1-1-1W 2-3-3CL
Bank Interleave: 4-way
Speed: 1x 100MHz (100MHz data rate)
Multiplier: 1x
Power Down Mode: No
Fixed Hole Present: No

< Memory Modules >
Memory Module 1: Memory Card Tech DM864VS65804-103G 64MB 8x(8Mx8) SDRAM PC100-322-622 (CL3 upto 100MHz) (CL2 upto 67MHz)
Memory Module 2: 128MB 16x(8Mx8) SDRAM PC100-322-622 (CL3 upto 100MHz)
Memory Module 3: Memory Card Tech DM1665VS65804X-7AG 128MB 16x(8Mx8) SDRAM PC133U-333-542 (CL3 upto 133MHz)
<END REPORT>

Physical and logical banks are "empty" but Mem module 1 is the "dead" stick.

What the hell is going on?!!!!

It's really wierd, but the ram works now! It's running perfect at 66mhz CL2. Havn't tried to o/c with it yet, will do that soon and see what comes out of it. Wish me luck!