Help plss i am new and need help with upgrading memory motherboard: MICRO-STAR INTERNATIONAL CO., LTD

hi i was plannig to buy and upgade my memory to 2GB ram but i am stuck i dont now what type of memory i can buy or need to buy

plss can some one help me it would be great and  tell if can buy any of  these memory cards:(i phrefere to buy the seconde pair becase ist cheaper only 30 pounds

http://cgi.ebay.co.uk/2GB-PC3200-DDR-Memory-RAM-DDR400-400-MHz-2-x-1GB-Kit_W0QQitemZ360058517670QQihZ023QQcategoryZ172QQtcZphotoQQcmdZViewItemQQ_trksidZp1742.m153.l1262 can u plss check and tell me

and can i buy this one http://cgi.ebay.co.uk/SAMSUNG-2GB-PC3200-400Mhz-DDR-RAM-DDR400-2-x-1GB-GB-Go_W0QQitemZ350069217180QQihZ022QQcategoryZ172QQssPageNameZWDVWQQrdZ1QQcmdZViewItem 

wich one would be better plsss help

my motherboard details ar as follows

SiSoftware Sandra

System
Manufacturer : MEDIONPC
Model : MS-7091
ID :****

Mainboard
Manufacturer : MICRO-STAR INTERNATIONAL CO., LTD
Multi-Processor (MP) Support : No
MPS Version : 1.40
Model : MS-7091
System BIOS : 01/10/2005-Grantsdale-6A79DM4IC-00
Chipset : Intel 915G/GV (Grantsdale)

System Memory Controller
Location : Mainboard
Error Correction Capability : None
Number of Memory Slots : 4
Maximum Installable Memory : 4GB
Bank0/1 - A0 : Empty
Bank2/3 - A1 : Empty
Bank4/5 - A2 : Empty
Bank6/7 - A3 : Empty

Chipset
Model : Intel 82915G/GV/GL/P/PL/GL/910GE/GL Grantsdale Host Bridge/DRAM Controller
Revision : A5
Bus : Intel AGTL+
Front Side Bus Speed : 4x 200MHz (800MHz)
Maximum FSB Speed : 4x 200MHz (800MHz)
Width : 64-bit
HTT - Hyper-Threading Technology : Yes
I/O Queue Depth : 12 request(s)
Maximum Bus Bandwidth : 6.25GB/s

Chipset 1 Hub Interface
Type : DMI (Direct Media Interface)
Version : 1.00
Number of Ports : 4
In/Out Width : 4-bit / 4-bit
Multiplier : 3/1x
Speed : 1x 100MHz (100MHz)

Logical/Chipset Memory Banks
Bank 0 : 256MB DDR 3.0-3-3-8 1T
Bank 4 : 256MB DDR 3.0-3-3-8 1T
Maximum Installable Memory : 4GB
Supported Memory Types :  DDR DDR2
Channels : 2
Memory Bus Speed : 2x 200MHz (400MHz)
Maximum Memory Speed : 2x 266MHz (532MHz)
Multiplier : 1/1x
Width : 64-bit
Memory Controller in Processor : No
Performance Acceleration Technology : No
Refresh Rate : 7.80µs
Power Save Mode : No
Fixed Hole Present : No
Maximum Memory Bus Bandwidth : 6.25GB/s

APIC 1
Version : 2.00
Multiplier : 1/2x
Maximum Interrupts : 24
IRQ Handler Engaged : Yes
Enhanced Support : Yes

Memory Module 1
Manufacturer : Samsung
Model : M3 68L3223FTN-CCC
Serial Number : 410F43FC
Type : 256MB DDR
Technology : 8x(32Mx8)
Speed : PC3200U DDR-200
Standard Timings : 3.0-3-3-8 2-11-0-0
Version : 1.0
Date of Manufacture : 20 January 2005
Memory DC Line : 2.50V
Set Timing @ 200MHz : 3.0-3-3-8 2-11-0-0
Set Timing @ 167MHz : 2.5-3-3-7 2-9-0-0

Memory Module 2
Manufacturer : Samsung
Model : M3 68L3223FTN-CCC
Serial Number : 410343E6
Type : 256MB DDR
Technology : 8x(32Mx8)
Speed : PC3200U DDR-200
Standard Timings : 3.0-3-3-8 2-11-0-0
Version : 1.0
Date of Manufacture : 20 January 2005
Memory DC Line : 2.50V
Set Timing @ 200MHz : 3.0-3-3-8 2-11-0-0
Set Timing @ 167MHz : 2.5-3-3-7 2-9-0-0

Environment Monitor 1
Model : Winbond W83637HF ISA
Version : 8.00
Mainboard Specific Support : No

Temperature Sensor(s)
Board Temperature : 45.00°C
CPU Temperature : 67.50°C td

Cooling Device(s)
Auto Fan Speed Control : Yes
CPU Fan : 2083rpm

Voltage Sensor(s)
CPU DC Line : 1.37V
+3.3V DC Line : 3.37V
+5V DC Line : 5.02V
+12V DC Line : 11.94V
-12V DC Line : 0.25V
Standby DC Line : 4.95V
Battery DC Line : 3.25V

System Bus(es) on Hub 1
Version : 2.30
System Bus 0 : PCI
System Bus 1 : PCIe 1.00 x16 2.5Gbps
System Bus 2 : PCIe 1.00 x1 2.5Gbps
System Bus 3 : PCI66

LPC Hub Controller 1
Model : Intel 82801FB/FR (ICH6/ICH6R) LPC Interface Bridge
Revision : A4
ACPI Power Management Enabled : Yes
Advanced TCO Mode Enabled : Yes
High Precision Timer Support : Yes
High Precision Timer Enabled : No
Delayed Transaction Enabled : Yes

LPC Hub Controller 2
Model : MSI 82801FB (ICH6) SMBus Controller
Revision : A4

Audio Device
Model : Intel 82801FB (ICH6) High Definition Audio Controller
Revision : A4
Type : HD (High-Definition) Audio
Version : 1.00
Number of In / Out / Bi-Directional Streams : 4 / 4 / 0
Number of Serial Data Streams : 1

USB Controller 1
Model : MSI 82801FB (ICH6) USB UHCI Controller 1
Revision : A4
Version : 1.10
Interface : UHCI
Channels : 2
Speed : 48MHz
Supported Speed(s) : Low (1.5Mbps) Full (12Mbps)
Legacy Emulation Enabled : No

USB Controller 2
Model : MSI 82801FB (ICH6) USB UHCI Controller 2
Revision : A4
Version : 1.10
Interface : UHCI
Channels : 2
Speed : 48MHz
Supported Speed(s) : Low (1.5Mbps) Full (12Mbps)
Legacy Emulation Enabled : No

USB Controller 3
Model : MSI 82801FB (ICH6) USB UHCI Controller 3
Revision : A4
Version : 1.10
Interface : UHCI
Channels : 2
Speed : 48MHz
Supported Speed(s) : Low (1.5Mbps) Full (12Mbps)
Legacy Emulation Enabled : No

USB Controller 4
Model : MSI 82801FB (ICH6) USB UHCI Controller 4
Revision : A4
Version : 1.10
Interface : UHCI
Channels : 2
Speed : 48MHz
Supported Speed(s) : Low (1.5Mbps) Full (12Mbps)
Legacy Emulation Enabled : No

USB Controller 5
Model : MSI 82801FB (ICH6) USB 2.0 EHCI Controller
Revision : A4
Version : 2.00
Specification : 1.00
Interface : EHCI
Channels : 8
Companion Controllers : 4
Supported Speed(s) : Low (1.5Mbps) Full (12Mbps) High (480Mbps)
Addressing Support : 64-bit
Legacy Emulation Enabled : No

FireWire/1394 Controller 1
Model : MSI VT6306 VIA Fire II IEEE-1394 OHCI Link Layer Controller
Revision : I1
Version : 1.10
Interface : OHCI
Enhanced Support : No
Channels : 64
Speed : 400MHz

System SMBus Controller 1
Model : Intel 801xx/63xx SMBus
Version : 0.03
Specification : 2.00
Advanced TCO Mode Enabled : Yes
Slave Device Enabled : Yes
PEC Support : Yes
Speed : 100kHz

Expansion Slot(s)
PCI0 (1h) : PCI 32-bit +5V PME Full-Length Available
PCI1 (2h) : PCI 32-bit +5V PME Full-Length Used
PCI2 (3h) : PCI 32-bit +5V PME Full-Length Available

Port Connector(s)
PRIMARY IDE : ATA
SECONDARY IDE : ATA
FDD : 8251 FIFO / Floppy Disk
COM1 : Serial Port 16450 / 9 Pin Dual Inline / DB-9 pin male
COM2 : Serial Port 16450 / 9 Pin Dual Inline / DB-9 pin male
LPT1 : Parallel Port ECP/EPP / DB-25 pin female / DB-25 pin female
Keyboard : Keyboard / PS/2 / PS/2
PS/2 Mouse : Mouse / PS/2 / PS/2
USB0 : USB
USB1 : USB