How does this make sense?

Specs First:
Mainboard : Asus P6T
Processor : Intel Core i7 920 @ 2666 MHz
Physical Memory : 6144 MB (3 x 2048 DDR3-SDRAM )
Video Card : NVIDIA GeForce GTX 275
Hard Disk : WDC (640 GB)
Operating System : Windows 7 Ultimate Professional 6.01.7100 (x64)

Ok so CPU-Z says I am running Dual Memory with 4 gigs, but it recognizes all three of my memory slots that are occupied trying to get tipple memory for 6 gigs. Windows 7 64bit also says I have 4 gigs of memory.

THis is what PC wizard says...

General Information :
DIMM0 (RAS 1) : 2048 (Single Bank)
DIMM1 : Empty
DIMM2 : Empty (HERE IS MY OTHER DIMM SAME AS THE OTHER TWO)
DIMM3 : Empty
DIMM4 (RAS 5) : 2048 (Single Bank)
DIMM5 : Empty

Information SPD EEPROM (DIMM0) :
Manufacturer : Mushkin
Part Number : Unspecified
Serial Number : 0018D79850517018
Specification : H
Type : DDR3-SDRAM PC3-10700 (667 MHz) - [DDR3-1333]
Format : UDIMM (133.35 x 0)
Size : 2048 MB (2 ranks, 8 banks)
Module Buffered : No
Module Registered : No
Module SLi Ready (EPP) : No
Module XMP : Yes
Width : 0-bit
Error Correction Capability : Unspecified
Refresh :
Voltage :
Prefetch Buffer : 8-bit
Manufacture : 2000
Supported Frequencies : 444 MHz, 592 MHz, 666 MHz
CAS Latency (tCL) : 6 clocks @444 MHz, 8 clocks @592 MHz, 9 clocks @666 MHz
RAS to CAS (tRCD) : 6 clocks @444 MHz, 8 clocks @592 MHz, 9 clocks @666 MHz
RAS Precharge (tRP) : 6 clocks @444 MHz, 8 clocks @592 MHz, 9 clocks @666 MHz
Cycle Time (tRAS) : 16 clocks @444 MHz, 22 clocks @592 MHz, 24 clocks @666 MHz
Min TRC : 22 clocks @444 MHz, 30 clocks @592 MHz, 33 clocks @666 MHz

Information SPD EEPROM (DIMM2) : (OMG it says it is here... ?!?!?)
Manufacturer : Mushkin
Part Number : Unspecified
Serial Number : 0018D79850517018
Specification : H
Type : DDR3-SDRAM PC3-10700 (667 MHz) - [DDR3-1333]
Format : UDIMM (133.35 x 0)
Size : 2048 MB (2 ranks, 8 banks)
Module Buffered : No
Module Registered : No
Module SLi Ready (EPP) : No
Module XMP : Yes
Width : 0-bit
Error Correction Capability : Unspecified
Refresh :
Voltage :
Prefetch Buffer : 8-bit
Manufacture : 2000
Supported Frequencies : 444 MHz, 592 MHz, 666 MHz
CAS Latency (tCL) : 6 clocks @444 MHz, 8 clocks @592 MHz, 9 clocks @666 MHz
RAS to CAS (tRCD) : 6 clocks @444 MHz, 8 clocks @592 MHz, 9 clocks @666 MHz
RAS Precharge (tRP) : 6 clocks @444 MHz, 8 clocks @592 MHz, 9 clocks @666 MHz
Cycle Time (tRAS) : 16 clocks @444 MHz, 22 clocks @592 MHz, 24 clocks @666 MHz
Min TRC : 22 clocks @444 MHz, 30 clocks @592 MHz, 33 clocks @666 MHz

Information SPD EEPROM (DIMM4) :
Manufacturer : Mushkin
Part Number : Unspecified
Serial Number : 0018D79850517018
Specification : H
Type : DDR3-SDRAM PC3-10700 (667 MHz) - [DDR3-1333]
Format : UDIMM (133.35 x 0)
Size : 2048 MB (2 ranks, 8 banks)
Module Buffered : No
Module Registered : No
Module SLi Ready (EPP) : No
Module XMP : Yes
Width : 0-bit
Error Correction Capability : Unspecified
Refresh :
Voltage :
Prefetch Buffer : 8-bit
Manufacture : 2000
Supported Frequencies : 444 MHz, 592 MHz, 666 MHz
CAS Latency (tCL) : 6 clocks @444 MHz, 8 clocks @592 MHz, 9 clocks @666 MHz
RAS to CAS (tRCD) : 6 clocks @444 MHz, 8 clocks @592 MHz, 9 clocks @666 MHz
RAS Precharge (tRP) : 6 clocks @444 MHz, 8 clocks @592 MHz, 9 clocks @666 MHz
Cycle Time (tRAS) : 16 clocks @444 MHz, 22 clocks @592 MHz, 24 clocks @666 MHz
Min TRC : 22 clocks @444 MHz, 30 clocks @592 MHz, 33 clocks @666 MHz

Memory Controller Information :
Memory Controller : DIMM, SDRAM
Number of connectors : 6
Max. Module Size : 3072 MB
Max. Memory Size : 18432 MB
Supported Speed : 70ns, 60ns
Supported Voltages : 3.3v
Error Detection Method : 64-bit ECC
Error Correction Capability : None
Current/Supported Interleave : 1-way/1-way


SO I am confused. CPU-Z and PC Wizard both show the memory in DIMM slot 2, but does not use it...

Any suggestions?