Extending my RAM

Hello,

I would like to buy a new memory sitck/s.
What should I buy? Which speed and capacity my motherboard and CPU supprots?
Price doesn't matter.

This is my comp. specs:

Field Value
Computer
Computer Type ACPI Multiprocessor PC
Operating System Microsoft Windows XP Professional
OS Service Pack Service Pack 3
Internet Explorer 8.0.6001.18702
DirectX 4.09.00.0904 (DirectX 9.0c)
Computer Name *******
User Name àñó
SMTP E-mail Address *******
Logon Domain *****
Date / Time 2010-01-29 / 23:13

Motherboard
CPU Type DualCore Intel Core 2 Duo E6300, 1866 MHz (7 x 267)
Motherboard Name Gigabyte GA-945P-S3 v1 (3 PCI, 3 PCI-E x1, 1 PCI-E x16, 4 DDR2 DIMM, Audio, Gigabit LAN)
Motherboard Chipset Intel Lakeport i945P
System Memory 1024 MB (DDR2-667 DDR2 SDRAM)
DIMM1: Kingston 512 MB DDR2-667 DDR2 SDRAM (5-5-5-15 @ 333 MHz) (4-4-4-12 @ 266 MHz) (3-3-3-9 @ 200 MHz)
DIMM3: Kingston 512 MB DDR2-667 DDR2 SDRAM (5-5-5-15 @ 333 MHz) (4-4-4-12 @ 266 MHz) (3-3-3-9 @ 200 MHz)
BIOS Type Award Modular (08/04/06)
Communication Port éöéàú ú÷ùåøúþ (COM1)
Communication Port éöéàú îãôñúþ (LPT1)


Field Value
Motherboard Properties
Motherboard ID 08/04/2006-I945-6A79TG08C-00
Motherboard Name Gigabyte GA-945P-S3 v1

Front Side Bus Properties
Bus Type Intel AGTL+
Bus Width 64-bit
Real Clock 267 MHz (QDR)
Effective Clock 1066 MHz
Bandwidth 8530 MB/s

Memory Bus Properties
Bus Type Dual DDR2 SDRAM
Bus Width 128-bit
DRAM:FSB Ratio 10:8
Real Clock 333 MHz (DDR)
Effective Clock 666 MHz
Bandwidth 10663 MB/s

Chipset Bus Properties
Bus Type Intel Direct Media Interface

Motherboard Physical Info
CPU Sockets/Slots 1 LGA775
Expansion Slots 3 PCI, 3 PCI-E x1, 1 PCI-E x16
RAM Slots 4 DDR2 DIMM
Integrated Devices Audio, Gigabit LAN
Form Factor ATX
Motherboard Size 190 mm x 300 mm
Motherboard Chipset i945P