I have read a ton of research on google and found that the best option is from amazon.com
I also got very fast&free shipping from amazon for more than 50 usd items.

Crucial / 1GB / 240-pin DIMM / DDR2 PC2-5300 Memory Module

Saturday, 13. March 2010. 23:46 by memory sdhc

Crucial / 1GB / 240-pin DIMM / DDR2 PC2-5300 memory module List Price: $21.99
Want more discount? get it here -> compare price
Read customer review

Every day, rely on your computer to make life easier. A Crucial DRAM upgrade can help your system work faster, and is one of the easiest, most convenient ways to improve system performance. Reap the profits, while making the daily tasks of system-critical applications. For over 12 years, Crucial has been recognized as a leader in the modernization of DRAM. Our products help people achieve better system performance to improve productivity, reliability and speed. As part of one of the world's leading DRAM Micron Technology, our long-term design and production allow us to build high-quality solutions of system memory for specific customers. We support our products by ensuring compatibility of the system, limited lifetime warranty, and an excellent service and support. A fundamental, we are the specialists in the memory.
buy it now!


Corsair TWIN2X4096-6400C5C 4GB XMS2 PC2-6400 800MHz 240-pin Dual Channel DDR2 Desktop Memory

Tuesday, 09. March 2010. 23:54 by memory sdhc

Corsair TWIN2X4096-6400C5C 4GB XMS2 PC2-6400 800Mhz 240-pin Dual Channel DDR2 Desktop Memory List Price: $99.99
Want more discount? get it here -> compare price
Read customer review

The TWIN2X2048-6400C5 is a pair of 4 GB of DDR2 SDRAM DIMMs built using Corsair latest performance combined with high tech heat sink. This part delivers outstanding performance of the latest generation of dual-channel DDR2 motherboards like the nForce 780i chipset from NVIDIA. It has been tested extensively in most DDR2 motherboards to ensure compatibility and performance at rated speed. This memory has been verified to operate at 800MHz at low latency 5-5-5-end signature 18.Sporting sink Corsair patented heat-removing products IC XMS2 new feature dominant performance while promoting increased stability. It has been tested extensively in most DDR2 motherboards to ensure compatibility and performance at rated speed. Ask The RAM GuyCorsair has created a site 24 / 7 customer support online only for you to www.asktheramguy.com. Here you can find other people like you who are "in
buy it now!


Corsair XMS2 4GB (2 x 2GB) PC2-6400 800MHz 240-pin DDR2 Dual-Channel Memory Kit – TWIN2X4096-6400C5

Sunday, 07. March 2010. 21:29 by memory sdhc

Corsair XMS2 4 GB (2 X 2 GB) PC2-6400 800 MHz 240-PIN DDR2 Dual-Channel Memory Kit - TWIN2X4096-6400C5 List Price: $87.99
Want more discount? get it here -> compare price
Read customer review

The TWIN2X4096-6400C5 G is a pair 4096MByte of DDR2 SDRAM DIMMs. This part delivers outstanding performance of the latest generation of dual-channel DDR2-based motherboards. It has been tested extensively in most DDR2 motherboards to ensure compatibility and performance at rated speed. This memory has been verified to operate at 800MHz at low latency of 5-5-5-18.
buy it now!