dúvida especificção motherboard MSI K7N2-V S/R.

Estou com uma dúvida...
MEMORY
0 MB on board, Supports six memory banks using three 184-pin DDR DIMMs.
Supports up to 3.0 GB PC400/333/266/200 DDR SDRAMs.

até aqui normal. leia embaixo...

#######Note: nForce2 does NOT support x4 memory device. 1GB can be made by other density of dram chip such as x 8, x16. #######

por favor expliquem para eu esta restrição... o que seria esse x4 memory device que a placa não suporta ?????? ach que ireri comprar essa placa custa U$ 73,00. e pararece ter um bom desempenho....

segue abaixo todas as especificaçoes completa...

Placas Mãe
MSI K7N2-V S/R
Fabricante: MSI


CPU
Supports Socket A for AMD Athlon/Athlon XP/Duron processors @ Front Side Bus 200/266/333/400 MHz.
Supports up to Athlon XP 3200+ processor

BIOS
The mainboard BIOS provides "Plug & Play" BIOS which detects the peripheral devices and expansion cards of the board automatically.
The mainboard provides a Desktop Management Interface (DMI) function which records your mainboard specifications.

CHIPSET
nVIDIA nForce2 400 Chipset
- Supports DDR200/266/333/400
- Supports 8x and PCI advanced high performance memory controller.

nVIDIA nForce2 MCP2 Chipset
- AC'97 Interface supporting up to two concurrent codecs
- Ultra ATA133 for the fastest hard disk throughput
- USB 2.0 EHCI/1.1 OHCI controller

MEMORY
0 MB on board, Supports six memory banks using three 184-pin DDR DIMMs.
Supports up to 3.0 GB PC400/333/266/200 DDR SDRAMs.
Note: nForce2 does NOT support x4 memory device. 1GB can be made by other density of dram chip such as x 8, x16.

SLOTS
(5) Five 32-bit PCI bus slots (support 3.3v/5v PCI bus interface).
(1) AGP (Accelerated Graphics Port) 1.5V 4x/8x slot

AUDIO
Chip integrated (5.1 channel H/W audio)
Direct Sound AC'97 audio

VIDEO
none

LAN
Chipset integrated 10/100 Base-T Ethernet/Fast Ethernet.

PCI IDE
An IDE controller on the MCP chipset provides IDE HDD/CDROM with PIO, Bus Master and Ultra DMA133/100/66 operation modes.
Can connect up to four IDE devices.

I/O PORTS
(1) Floppy port that supports two FDD with 360KB, 720KB, 1.44MB and 2.88MB.
(1) RS-232 Serial port
(1) Parallel port supports SPP/EPP/ECP mode
(3) Audio ports for Line-in/Line-Out/Mic-In
(6) USB 2.0/1.1 ports (Rear x 2/Front x 4)
(1) 10BaseT/100BaseTX/RJ45 port
(1) IrDA connector for SIR/ASKIR/HPSIR

PCB SIZE
ATX form factor, 30.4cm x 23cm