Hi there! I'm resurrecting my old mobo Asus m2n32 SLI deluxe. I'd recently installed: CPU: Phenom II X4 955 Black Edition + Scythe Katana 3 (replacing an Athlon X2 4600+ series). GPU: Zotac GeForce GTX 260² 896MB (replacing XFX 7600GS 512mb). SSD: Crucial MX500, plus HDD Seagate 1TB. Bios version: 5002 upgrade. Current RAM: 6 GB 2x2GB Samsung + 2x1GB Hynix DDR2 PC2-5300 (running at 333MHz). I would like to replace and upgrade to 8GB @800MHz (4x2GB), and I've got serveral options to getting PC2-6400 modules: CL5 or CL6, single or dual rank, buffered or unbuffered... which will be better? I appreciate any suggestions to optimize perform RAM on my old mobo. Thanks in advance.