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.

PNY OPTIMA 4GB (2x2GB) Dual Channel Kit DDR2 667 MHz PC2-5300 Desktop DIMM Memory Modules MD4096KD2-667

Friday, 19. March 2010. 14:16 by memory sdhc

PNY OPTIMA 4GB (2x2GB) Dual Channel Kit DDR2 667 MHz PC2-5300 Desktop DIMM Memory Modules MD4096KD2-667 List Price: $85.99
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4GB Kit (2x2GB) PC2-5300 667MHz DDR2 DIMM Desktop
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PNY OPTIMA 2GB (2x1GB) Dual Channel Kit DDR2 667 MHz PC2-5300 Desktop DIMM Memory Modules MD2048KD2-667

Wednesday, 17. March 2010. 13:21 by memory sdhc

PNY OPTIMA 2GB (2x1GB) Dual Channel Kit DDR2 667 MHz PC2-5300 Desktop DIMM Memory Modules MD2048KD2-667 List Price: $43.99
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DDR2 is the next generation of DDR memory. DDR2 memory features faster speeds, greater bandwidth, lower power consumption and thermal performance. Although DDR2 modules are the modules the physical size as DDR modules, the plug-in connector configuration is different and DDR2 are not compatible with PCs requiring DDR modules, and vice-versa.PNY manufactures DDR2 memory upgrades valued at PC2 – 3200, PC2-4200, PC2-5300 and higher. They are compatible with desktop and notebook computers and processors including Intel Pentium, Celeron, Centrino, AMD Athlon and Sempron Socket AM2, and others. PNY expansion modules are compatible with systems from Apple, Compaq, Dell, Gateway, HP, IBM and more than 5,000 other systems.Boost performance of your PC. The PNY memory upgrades will prove to be an outstanding value now and in the future.
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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
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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.
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Toshiba – Memory – 2 GB – SO DIMM 200-pin – DDR2 – 667 MHz / PC2-5300 – unbuffered – non-ECC

Monday, 16. November 2009. 12:30 by memory sdhc

Toshiba - Memory - 2 GB - SO DIMM 200-pin - DDR2 - 667 MHz / PC2-5300 - unbuffered - non-ECC List Price: $70.60
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Reliability. Performance. Technology. Leadership. The Toshiba name means all this and much more. Toshiba builds upon this heritage by the most innovative in the industry, high-quality solutions.
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